Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

58 files changed, 60942 insertions, 0 deletions

diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c
new file mode 100644
index 000000000..7601ce914
--- /dev/null
+++ b/net/bluetooth/6lowpan.c
@@ -0,0 +1,1321 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+   Copyright (c) 2013-2014 Intel Corp.
+
+*/
+
+#include <linux/if_arp.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/module.h>
+#include <linux/debugfs.h>
+
+#include <net/ipv6.h>
+#include <net/ip6_route.h>
+#include <net/addrconf.h>
+#include <net/pkt_sched.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/l2cap.h>
+
+#include <net/6lowpan.h> /* for the compression support */
+
+#define VERSION "0.1"
+
+static struct dentry *lowpan_enable_debugfs;
+static struct dentry *lowpan_control_debugfs;
+
+#define IFACE_NAME_TEMPLATE "bt%d"
+
+struct skb_cb {
+	struct in6_addr addr;
+	struct in6_addr gw;
+	struct l2cap_chan *chan;
+};
+#define lowpan_cb(skb) ((struct skb_cb *)((skb)->cb))
+
+/* The devices list contains those devices that we are acting
+ * as a proxy. The BT 6LoWPAN device is a virtual device that
+ * connects to the Bluetooth LE device. The real connection to
+ * BT device is done via l2cap layer. There exists one
+ * virtual device / one BT 6LoWPAN network (=hciX device).
+ * The list contains struct lowpan_dev elements.
+ */
+static LIST_HEAD(bt_6lowpan_devices);
+static DEFINE_SPINLOCK(devices_lock);
+
+static bool enable_6lowpan;
+
+/* We are listening incoming connections via this channel
+ */
+static struct l2cap_chan *listen_chan;
+static DEFINE_MUTEX(set_lock);
+
+struct lowpan_peer {
+	struct list_head list;
+	struct rcu_head rcu;
+	struct l2cap_chan *chan;
+
+	/* peer addresses in various formats */
+	unsigned char lladdr[ETH_ALEN];
+	struct in6_addr peer_addr;
+};
+
+struct lowpan_btle_dev {
+	struct list_head list;
+
+	struct hci_dev *hdev;
+	struct net_device *netdev;
+	struct list_head peers;
+	atomic_t peer_count; /* number of items in peers list */
+
+	struct work_struct delete_netdev;
+	struct delayed_work notify_peers;
+};
+
+static inline struct lowpan_btle_dev *
+lowpan_btle_dev(const struct net_device *netdev)
+{
+	return (struct lowpan_btle_dev *)lowpan_dev(netdev)->priv;
+}
+
+static inline void peer_add(struct lowpan_btle_dev *dev,
+			    struct lowpan_peer *peer)
+{
+	list_add_rcu(&peer->list, &dev->peers);
+	atomic_inc(&dev->peer_count);
+}
+
+static inline bool peer_del(struct lowpan_btle_dev *dev,
+			    struct lowpan_peer *peer)
+{
+	list_del_rcu(&peer->list);
+	kfree_rcu(peer, rcu);
+
+	module_put(THIS_MODULE);
+
+	if (atomic_dec_and_test(&dev->peer_count)) {
+		BT_DBG("last peer");
+		return true;
+	}
+
+	return false;
+}
+
+static inline struct lowpan_peer *peer_lookup_ba(struct lowpan_btle_dev *dev,
+						 bdaddr_t *ba, __u8 type)
+{
+	struct lowpan_peer *peer;
+
+	BT_DBG("peers %d addr %pMR type %d", atomic_read(&dev->peer_count),
+	       ba, type);
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(peer, &dev->peers, list) {
+		BT_DBG("dst addr %pMR dst type %d",
+		       &peer->chan->dst, peer->chan->dst_type);
+
+		if (bacmp(&peer->chan->dst, ba))
+			continue;
+
+		if (type == peer->chan->dst_type) {
+			rcu_read_unlock();
+			return peer;
+		}
+	}
+
+	rcu_read_unlock();
+
+	return NULL;
+}
+
+static inline struct lowpan_peer *
+__peer_lookup_chan(struct lowpan_btle_dev *dev, struct l2cap_chan *chan)
+{
+	struct lowpan_peer *peer;
+
+	list_for_each_entry_rcu(peer, &dev->peers, list) {
+		if (peer->chan == chan)
+			return peer;
+	}
+
+	return NULL;
+}
+
+static inline struct lowpan_peer *
+__peer_lookup_conn(struct lowpan_btle_dev *dev, struct l2cap_conn *conn)
+{
+	struct lowpan_peer *peer;
+
+	list_for_each_entry_rcu(peer, &dev->peers, list) {
+		if (peer->chan->conn == conn)
+			return peer;
+	}
+
+	return NULL;
+}
+
+static inline struct lowpan_peer *peer_lookup_dst(struct lowpan_btle_dev *dev,
+						  struct in6_addr *daddr,
+						  struct sk_buff *skb)
+{
+	struct rt6_info *rt = (struct rt6_info *)skb_dst(skb);
+	int count = atomic_read(&dev->peer_count);
+	const struct in6_addr *nexthop;
+	struct lowpan_peer *peer;
+	struct neighbour *neigh;
+
+	BT_DBG("peers %d addr %pI6c rt %p", count, daddr, rt);
+
+	if (!rt) {
+		if (ipv6_addr_any(&lowpan_cb(skb)->gw)) {
+			/* There is neither route nor gateway,
+			 * probably the destination is a direct peer.
+			 */
+			nexthop = daddr;
+		} else {
+			/* There is a known gateway
+			 */
+			nexthop = &lowpan_cb(skb)->gw;
+		}
+	} else {
+		nexthop = rt6_nexthop(rt, daddr);
+
+		/* We need to remember the address because it is needed
+		 * by bt_xmit() when sending the packet. In bt_xmit(), the
+		 * destination routing info is not set.
+		 */
+		memcpy(&lowpan_cb(skb)->gw, nexthop, sizeof(struct in6_addr));
+	}
+
+	BT_DBG("gw %pI6c", nexthop);
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(peer, &dev->peers, list) {
+		BT_DBG("dst addr %pMR dst type %d ip %pI6c",
+		       &peer->chan->dst, peer->chan->dst_type,
+		       &peer->peer_addr);
+
+		if (!ipv6_addr_cmp(&peer->peer_addr, nexthop)) {
+			rcu_read_unlock();
+			return peer;
+		}
+	}
+
+	/* use the neighbour cache for matching addresses assigned by SLAAC
+	*/
+	neigh = __ipv6_neigh_lookup(dev->netdev, nexthop);
+	if (neigh) {
+		list_for_each_entry_rcu(peer, &dev->peers, list) {
+			if (!memcmp(neigh->ha, peer->lladdr, ETH_ALEN)) {
+				neigh_release(neigh);
+				rcu_read_unlock();
+				return peer;
+			}
+		}
+		neigh_release(neigh);
+	}
+
+	rcu_read_unlock();
+
+	return NULL;
+}
+
+static struct lowpan_peer *lookup_peer(struct l2cap_conn *conn)
+{
+	struct lowpan_btle_dev *entry;
+	struct lowpan_peer *peer = NULL;
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(entry, &bt_6lowpan_devices, list) {
+		peer = __peer_lookup_conn(entry, conn);
+		if (peer)
+			break;
+	}
+
+	rcu_read_unlock();
+
+	return peer;
+}
+
+static struct lowpan_btle_dev *lookup_dev(struct l2cap_conn *conn)
+{
+	struct lowpan_btle_dev *entry;
+	struct lowpan_btle_dev *dev = NULL;
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(entry, &bt_6lowpan_devices, list) {
+		if (conn->hcon->hdev == entry->hdev) {
+			dev = entry;
+			break;
+		}
+	}
+
+	rcu_read_unlock();
+
+	return dev;
+}
+
+static int give_skb_to_upper(struct sk_buff *skb, struct net_device *dev)
+{
+	struct sk_buff *skb_cp;
+
+	skb_cp = skb_copy(skb, GFP_ATOMIC);
+	if (!skb_cp)
+		return NET_RX_DROP;
+
+	return netif_rx_ni(skb_cp);
+}
+
+static int iphc_decompress(struct sk_buff *skb, struct net_device *netdev,
+			   struct lowpan_peer *peer)
+{
+	const u8 *saddr;
+
+	saddr = peer->lladdr;
+
+	return lowpan_header_decompress(skb, netdev, netdev->dev_addr, saddr);
+}
+
+static int recv_pkt(struct sk_buff *skb, struct net_device *dev,
+		    struct lowpan_peer *peer)
+{
+	struct sk_buff *local_skb;
+	int ret;
+
+	if (!netif_running(dev))
+		goto drop;
+
+	if (dev->type != ARPHRD_6LOWPAN || !skb->len)
+		goto drop;
+
+	skb_reset_network_header(skb);
+
+	skb = skb_share_check(skb, GFP_ATOMIC);
+	if (!skb)
+		goto drop;
+
+	/* check that it's our buffer */
+	if (lowpan_is_ipv6(*skb_network_header(skb))) {
+		/* Pull off the 1-byte of 6lowpan header. */
+		skb_pull(skb, 1);
+
+		/* Copy the packet so that the IPv6 header is
+		 * properly aligned.
+		 */
+		local_skb = skb_copy_expand(skb, NET_SKB_PAD - 1,
+					    skb_tailroom(skb), GFP_ATOMIC);
+		if (!local_skb)
+			goto drop;
+
+		local_skb->protocol = htons(ETH_P_IPV6);
+		local_skb->pkt_type = PACKET_HOST;
+		local_skb->dev = dev;
+
+		skb_set_transport_header(local_skb, sizeof(struct ipv6hdr));
+
+		if (give_skb_to_upper(local_skb, dev) != NET_RX_SUCCESS) {
+			kfree_skb(local_skb);
+			goto drop;
+		}
+
+		dev->stats.rx_bytes += skb->len;
+		dev->stats.rx_packets++;
+
+		consume_skb(local_skb);
+		consume_skb(skb);
+	} else if (lowpan_is_iphc(*skb_network_header(skb))) {
+		local_skb = skb_clone(skb, GFP_ATOMIC);
+		if (!local_skb)
+			goto drop;
+
+		local_skb->dev = dev;
+
+		ret = iphc_decompress(local_skb, dev, peer);
+		if (ret < 0) {
+			BT_DBG("iphc_decompress failed: %d", ret);
+			kfree_skb(local_skb);
+			goto drop;
+		}
+
+		local_skb->protocol = htons(ETH_P_IPV6);
+		local_skb->pkt_type = PACKET_HOST;
+
+		if (give_skb_to_upper(local_skb, dev)
+				!= NET_RX_SUCCESS) {
+			kfree_skb(local_skb);
+			goto drop;
+		}
+
+		dev->stats.rx_bytes += skb->len;
+		dev->stats.rx_packets++;
+
+		consume_skb(local_skb);
+		consume_skb(skb);
+	} else {
+		BT_DBG("unknown packet type");
+		goto drop;
+	}
+
+	return NET_RX_SUCCESS;
+
+drop:
+	dev->stats.rx_dropped++;
+	return NET_RX_DROP;
+}
+
+/* Packet from BT LE device */
+static int chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb)
+{
+	struct lowpan_btle_dev *dev;
+	struct lowpan_peer *peer;
+	int err;
+
+	peer = lookup_peer(chan->conn);
+	if (!peer)
+		return -ENOENT;
+
+	dev = lookup_dev(chan->conn);
+	if (!dev || !dev->netdev)
+		return -ENOENT;
+
+	err = recv_pkt(skb, dev->netdev, peer);
+	if (err) {
+		BT_DBG("recv pkt %d", err);
+		err = -EAGAIN;
+	}
+
+	return err;
+}
+
+static int setup_header(struct sk_buff *skb, struct net_device *netdev,
+			bdaddr_t *peer_addr, u8 *peer_addr_type)
+{
+	struct in6_addr ipv6_daddr;
+	struct ipv6hdr *hdr;
+	struct lowpan_btle_dev *dev;
+	struct lowpan_peer *peer;
+	u8 *daddr;
+	int err, status = 0;
+
+	hdr = ipv6_hdr(skb);
+
+	dev = lowpan_btle_dev(netdev);
+
+	memcpy(&ipv6_daddr, &hdr->daddr, sizeof(ipv6_daddr));
+
+	if (ipv6_addr_is_multicast(&ipv6_daddr)) {
+		lowpan_cb(skb)->chan = NULL;
+		daddr = NULL;
+	} else {
+		BT_DBG("dest IP %pI6c", &ipv6_daddr);
+
+		/* The packet might be sent to 6lowpan interface
+		 * because of routing (either via default route
+		 * or user set route) so get peer according to
+		 * the destination address.
+		 */
+		peer = peer_lookup_dst(dev, &ipv6_daddr, skb);
+		if (!peer) {
+			BT_DBG("no such peer");
+			return -ENOENT;
+		}
+
+		daddr = peer->lladdr;
+		*peer_addr = peer->chan->dst;
+		*peer_addr_type = peer->chan->dst_type;
+		lowpan_cb(skb)->chan = peer->chan;
+
+		status = 1;
+	}
+
+	lowpan_header_compress(skb, netdev, daddr, dev->netdev->dev_addr);
+
+	err = dev_hard_header(skb, netdev, ETH_P_IPV6, NULL, NULL, 0);
+	if (err < 0)
+		return err;
+
+	return status;
+}
+
+static int header_create(struct sk_buff *skb, struct net_device *netdev,
+			 unsigned short type, const void *_daddr,
+			 const void *_saddr, unsigned int len)
+{
+	if (type != ETH_P_IPV6)
+		return -EINVAL;
+
+	return 0;
+}
+
+/* Packet to BT LE device */
+static int send_pkt(struct l2cap_chan *chan, struct sk_buff *skb,
+		    struct net_device *netdev)
+{
+	struct msghdr msg;
+	struct kvec iv;
+	int err;
+
+	/* Remember the skb so that we can send EAGAIN to the caller if
+	 * we run out of credits.
+	 */
+	chan->data = skb;
+
+	iv.iov_base = skb->data;
+	iv.iov_len = skb->len;
+
+	memset(&msg, 0, sizeof(msg));
+	iov_iter_kvec(&msg.msg_iter, WRITE, &iv, 1, skb->len);
+
+	err = l2cap_chan_send(chan, &msg, skb->len);
+	if (err > 0) {
+		netdev->stats.tx_bytes += err;
+		netdev->stats.tx_packets++;
+		return 0;
+	}
+
+	if (err < 0)
+		netdev->stats.tx_errors++;
+
+	return err;
+}
+
+static int send_mcast_pkt(struct sk_buff *skb, struct net_device *netdev)
+{
+	struct sk_buff *local_skb;
+	struct lowpan_btle_dev *entry;
+	int err = 0;
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(entry, &bt_6lowpan_devices, list) {
+		struct lowpan_peer *pentry;
+		struct lowpan_btle_dev *dev;
+
+		if (entry->netdev != netdev)
+			continue;
+
+		dev = lowpan_btle_dev(entry->netdev);
+
+		list_for_each_entry_rcu(pentry, &dev->peers, list) {
+			int ret;
+
+			local_skb = skb_clone(skb, GFP_ATOMIC);
+
+			BT_DBG("xmit %s to %pMR type %d IP %pI6c chan %p",
+			       netdev->name,
+			       &pentry->chan->dst, pentry->chan->dst_type,
+			       &pentry->peer_addr, pentry->chan);
+			ret = send_pkt(pentry->chan, local_skb, netdev);
+			if (ret < 0)
+				err = ret;
+
+			kfree_skb(local_skb);
+		}
+	}
+
+	rcu_read_unlock();
+
+	return err;
+}
+
+static netdev_tx_t bt_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+	int err = 0;
+	bdaddr_t addr;
+	u8 addr_type;
+
+	/* We must take a copy of the skb before we modify/replace the ipv6
+	 * header as the header could be used elsewhere
+	 */
+	skb = skb_unshare(skb, GFP_ATOMIC);
+	if (!skb)
+		return NET_XMIT_DROP;
+
+	/* Return values from setup_header()
+	 *  <0 - error, packet is dropped
+	 *   0 - this is a multicast packet
+	 *   1 - this is unicast packet
+	 */
+	err = setup_header(skb, netdev, &addr, &addr_type);
+	if (err < 0) {
+		kfree_skb(skb);
+		return NET_XMIT_DROP;
+	}
+
+	if (err) {
+		if (lowpan_cb(skb)->chan) {
+			BT_DBG("xmit %s to %pMR type %d IP %pI6c chan %p",
+			       netdev->name, &addr, addr_type,
+			       &lowpan_cb(skb)->addr, lowpan_cb(skb)->chan);
+			err = send_pkt(lowpan_cb(skb)->chan, skb, netdev);
+		} else {
+			err = -ENOENT;
+		}
+	} else {
+		/* We need to send the packet to every device behind this
+		 * interface.
+		 */
+		err = send_mcast_pkt(skb, netdev);
+	}
+
+	dev_kfree_skb(skb);
+
+	if (err)
+		BT_DBG("ERROR: xmit failed (%d)", err);
+
+	return err < 0 ? NET_XMIT_DROP : err;
+}
+
+static int bt_dev_init(struct net_device *dev)
+{
+	netdev_lockdep_set_classes(dev);
+
+	return 0;
+}
+
+static const struct net_device_ops netdev_ops = {
+	.ndo_init		= bt_dev_init,
+	.ndo_start_xmit		= bt_xmit,
+};
+
+static const struct header_ops header_ops = {
+	.create	= header_create,
+};
+
+static void netdev_setup(struct net_device *dev)
+{
+	dev->hard_header_len	= 0;
+	dev->needed_tailroom	= 0;
+	dev->flags		= IFF_RUNNING | IFF_MULTICAST;
+	dev->watchdog_timeo	= 0;
+	dev->tx_queue_len	= DEFAULT_TX_QUEUE_LEN;
+
+	dev->netdev_ops		= &netdev_ops;
+	dev->header_ops		= &header_ops;
+	dev->needs_free_netdev	= true;
+}
+
+static struct device_type bt_type = {
+	.name	= "bluetooth",
+};
+
+static void ifup(struct net_device *netdev)
+{
+	int err;
+
+	rtnl_lock();
+	err = dev_open(netdev, NULL);
+	if (err < 0)
+		BT_INFO("iface %s cannot be opened (%d)", netdev->name, err);
+	rtnl_unlock();
+}
+
+static void ifdown(struct net_device *netdev)
+{
+	rtnl_lock();
+	dev_close(netdev);
+	rtnl_unlock();
+}
+
+static void do_notify_peers(struct work_struct *work)
+{
+	struct lowpan_btle_dev *dev = container_of(work, struct lowpan_btle_dev,
+						   notify_peers.work);
+
+	netdev_notify_peers(dev->netdev); /* send neighbour adv at startup */
+}
+
+static bool is_bt_6lowpan(struct hci_conn *hcon)
+{
+	if (hcon->type != LE_LINK)
+		return false;
+
+	if (!enable_6lowpan)
+		return false;
+
+	return true;
+}
+
+static struct l2cap_chan *chan_create(void)
+{
+	struct l2cap_chan *chan;
+
+	chan = l2cap_chan_create();
+	if (!chan)
+		return NULL;
+
+	l2cap_chan_set_defaults(chan);
+
+	chan->chan_type = L2CAP_CHAN_CONN_ORIENTED;
+	chan->mode = L2CAP_MODE_LE_FLOWCTL;
+	chan->imtu = 1280;
+
+	return chan;
+}
+
+static struct l2cap_chan *add_peer_chan(struct l2cap_chan *chan,
+					struct lowpan_btle_dev *dev,
+					bool new_netdev)
+{
+	struct lowpan_peer *peer;
+
+	peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
+	if (!peer)
+		return NULL;
+
+	peer->chan = chan;
+	memset(&peer->peer_addr, 0, sizeof(struct in6_addr));
+
+	baswap((void *)peer->lladdr, &chan->dst);
+
+	lowpan_iphc_uncompress_eui48_lladdr(&peer->peer_addr, peer->lladdr);
+
+	spin_lock(&devices_lock);
+	INIT_LIST_HEAD(&peer->list);
+	peer_add(dev, peer);
+	spin_unlock(&devices_lock);
+
+	/* Notifying peers about us needs to be done without locks held */
+	if (new_netdev)
+		INIT_DELAYED_WORK(&dev->notify_peers, do_notify_peers);
+	schedule_delayed_work(&dev->notify_peers, msecs_to_jiffies(100));
+
+	return peer->chan;
+}
+
+static int setup_netdev(struct l2cap_chan *chan, struct lowpan_btle_dev **dev)
+{
+	struct net_device *netdev;
+	int err = 0;
+
+	netdev = alloc_netdev(LOWPAN_PRIV_SIZE(sizeof(struct lowpan_btle_dev)),
+			      IFACE_NAME_TEMPLATE, NET_NAME_UNKNOWN,
+			      netdev_setup);
+	if (!netdev)
+		return -ENOMEM;
+
+	netdev->addr_assign_type = NET_ADDR_PERM;
+	baswap((void *)netdev->dev_addr, &chan->src);
+
+	netdev->netdev_ops = &netdev_ops;
+	SET_NETDEV_DEV(netdev, &chan->conn->hcon->hdev->dev);
+	SET_NETDEV_DEVTYPE(netdev, &bt_type);
+
+	*dev = lowpan_btle_dev(netdev);
+	(*dev)->netdev = netdev;
+	(*dev)->hdev = chan->conn->hcon->hdev;
+	INIT_LIST_HEAD(&(*dev)->peers);
+
+	spin_lock(&devices_lock);
+	INIT_LIST_HEAD(&(*dev)->list);
+	list_add_rcu(&(*dev)->list, &bt_6lowpan_devices);
+	spin_unlock(&devices_lock);
+
+	err = lowpan_register_netdev(netdev, LOWPAN_LLTYPE_BTLE);
+	if (err < 0) {
+		BT_INFO("register_netdev failed %d", err);
+		spin_lock(&devices_lock);
+		list_del_rcu(&(*dev)->list);
+		spin_unlock(&devices_lock);
+		free_netdev(netdev);
+		goto out;
+	}
+
+	BT_DBG("ifindex %d peer bdaddr %pMR type %d my addr %pMR type %d",
+	       netdev->ifindex, &chan->dst, chan->dst_type,
+	       &chan->src, chan->src_type);
+	set_bit(__LINK_STATE_PRESENT, &netdev->state);
+
+	return 0;
+
+out:
+	return err;
+}
+
+static inline void chan_ready_cb(struct l2cap_chan *chan)
+{
+	struct lowpan_btle_dev *dev;
+	bool new_netdev = false;
+
+	dev = lookup_dev(chan->conn);
+
+	BT_DBG("chan %p conn %p dev %p", chan, chan->conn, dev);
+
+	if (!dev) {
+		if (setup_netdev(chan, &dev) < 0) {
+			l2cap_chan_del(chan, -ENOENT);
+			return;
+		}
+		new_netdev = true;
+	}
+
+	if (!try_module_get(THIS_MODULE))
+		return;
+
+	add_peer_chan(chan, dev, new_netdev);
+	ifup(dev->netdev);
+}
+
+static inline struct l2cap_chan *chan_new_conn_cb(struct l2cap_chan *pchan)
+{
+	struct l2cap_chan *chan;
+
+	chan = chan_create();
+	if (!chan)
+		return NULL;
+
+	chan->ops = pchan->ops;
+
+	BT_DBG("chan %p pchan %p", chan, pchan);
+
+	return chan;
+}
+
+static void delete_netdev(struct work_struct *work)
+{
+	struct lowpan_btle_dev *entry = container_of(work,
+						     struct lowpan_btle_dev,
+						     delete_netdev);
+
+	lowpan_unregister_netdev(entry->netdev);
+
+	/* The entry pointer is deleted by the netdev destructor. */
+}
+
+static void chan_close_cb(struct l2cap_chan *chan)
+{
+	struct lowpan_btle_dev *entry;
+	struct lowpan_btle_dev *dev = NULL;
+	struct lowpan_peer *peer;
+	int err = -ENOENT;
+	bool last = false, remove = true;
+
+	BT_DBG("chan %p conn %p", chan, chan->conn);
+
+	if (chan->conn && chan->conn->hcon) {
+		if (!is_bt_6lowpan(chan->conn->hcon))
+			return;
+
+		/* If conn is set, then the netdev is also there and we should
+		 * not remove it.
+		 */
+		remove = false;
+	}
+
+	spin_lock(&devices_lock);
+
+	list_for_each_entry_rcu(entry, &bt_6lowpan_devices, list) {
+		dev = lowpan_btle_dev(entry->netdev);
+		peer = __peer_lookup_chan(dev, chan);
+		if (peer) {
+			last = peer_del(dev, peer);
+			err = 0;
+
+			BT_DBG("dev %p removing %speer %p", dev,
+			       last ? "last " : "1 ", peer);
+			BT_DBG("chan %p orig refcnt %d", chan,
+			       kref_read(&chan->kref));
+
+			l2cap_chan_put(chan);
+			break;
+		}
+	}
+
+	if (!err && last && dev && !atomic_read(&dev->peer_count)) {
+		spin_unlock(&devices_lock);
+
+		cancel_delayed_work_sync(&dev->notify_peers);
+
+		ifdown(dev->netdev);
+
+		if (remove) {
+			INIT_WORK(&entry->delete_netdev, delete_netdev);
+			schedule_work(&entry->delete_netdev);
+		}
+	} else {
+		spin_unlock(&devices_lock);
+	}
+
+	return;
+}
+
+static void chan_state_change_cb(struct l2cap_chan *chan, int state, int err)
+{
+	BT_DBG("chan %p conn %p state %s err %d", chan, chan->conn,
+	       state_to_string(state), err);
+}
+
+static struct sk_buff *chan_alloc_skb_cb(struct l2cap_chan *chan,
+					 unsigned long hdr_len,
+					 unsigned long len, int nb)
+{
+	/* Note that we must allocate using GFP_ATOMIC here as
+	 * this function is called originally from netdev hard xmit
+	 * function in atomic context.
+	 */
+	return bt_skb_alloc(hdr_len + len, GFP_ATOMIC);
+}
+
+static void chan_suspend_cb(struct l2cap_chan *chan)
+{
+	struct lowpan_btle_dev *dev;
+
+	BT_DBG("chan %p suspend", chan);
+
+	dev = lookup_dev(chan->conn);
+	if (!dev || !dev->netdev)
+		return;
+
+	netif_stop_queue(dev->netdev);
+}
+
+static void chan_resume_cb(struct l2cap_chan *chan)
+{
+	struct lowpan_btle_dev *dev;
+
+	BT_DBG("chan %p resume", chan);
+
+	dev = lookup_dev(chan->conn);
+	if (!dev || !dev->netdev)
+		return;
+
+	netif_wake_queue(dev->netdev);
+}
+
+static long chan_get_sndtimeo_cb(struct l2cap_chan *chan)
+{
+	return L2CAP_CONN_TIMEOUT;
+}
+
+static const struct l2cap_ops bt_6lowpan_chan_ops = {
+	.name			= "L2CAP 6LoWPAN channel",
+	.new_connection		= chan_new_conn_cb,
+	.recv			= chan_recv_cb,
+	.close			= chan_close_cb,
+	.state_change		= chan_state_change_cb,
+	.ready			= chan_ready_cb,
+	.resume			= chan_resume_cb,
+	.suspend		= chan_suspend_cb,
+	.get_sndtimeo		= chan_get_sndtimeo_cb,
+	.alloc_skb		= chan_alloc_skb_cb,
+
+	.teardown		= l2cap_chan_no_teardown,
+	.defer			= l2cap_chan_no_defer,
+	.set_shutdown		= l2cap_chan_no_set_shutdown,
+};
+
+static inline __u8 bdaddr_type(__u8 type)
+{
+	if (type == ADDR_LE_DEV_PUBLIC)
+		return BDADDR_LE_PUBLIC;
+	else
+		return BDADDR_LE_RANDOM;
+}
+
+static int bt_6lowpan_connect(bdaddr_t *addr, u8 dst_type)
+{
+	struct l2cap_chan *chan;
+	int err;
+
+	chan = chan_create();
+	if (!chan)
+		return -EINVAL;
+
+	chan->ops = &bt_6lowpan_chan_ops;
+
+	err = l2cap_chan_connect(chan, cpu_to_le16(L2CAP_PSM_IPSP), 0,
+				 addr, dst_type);
+
+	BT_DBG("chan %p err %d", chan, err);
+	if (err < 0)
+		l2cap_chan_put(chan);
+
+	return err;
+}
+
+static int bt_6lowpan_disconnect(struct l2cap_conn *conn, u8 dst_type)
+{
+	struct lowpan_peer *peer;
+
+	BT_DBG("conn %p dst type %d", conn, dst_type);
+
+	peer = lookup_peer(conn);
+	if (!peer)
+		return -ENOENT;
+
+	BT_DBG("peer %p chan %p", peer, peer->chan);
+
+	l2cap_chan_close(peer->chan, ENOENT);
+
+	return 0;
+}
+
+static struct l2cap_chan *bt_6lowpan_listen(void)
+{
+	bdaddr_t *addr = BDADDR_ANY;
+	struct l2cap_chan *chan;
+	int err;
+
+	if (!enable_6lowpan)
+		return NULL;
+
+	chan = chan_create();
+	if (!chan)
+		return NULL;
+
+	chan->ops = &bt_6lowpan_chan_ops;
+	chan->state = BT_LISTEN;
+	chan->src_type = BDADDR_LE_PUBLIC;
+
+	atomic_set(&chan->nesting, L2CAP_NESTING_PARENT);
+
+	BT_DBG("chan %p src type %d", chan, chan->src_type);
+
+	err = l2cap_add_psm(chan, addr, cpu_to_le16(L2CAP_PSM_IPSP));
+	if (err) {
+		l2cap_chan_put(chan);
+		BT_ERR("psm cannot be added err %d", err);
+		return NULL;
+	}
+
+	return chan;
+}
+
+static int get_l2cap_conn(char *buf, bdaddr_t *addr, u8 *addr_type,
+			  struct l2cap_conn **conn)
+{
+	struct hci_conn *hcon;
+	struct hci_dev *hdev;
+	int n;
+
+	n = sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx %hhu",
+		   &addr->b[5], &addr->b[4], &addr->b[3],
+		   &addr->b[2], &addr->b[1], &addr->b[0],
+		   addr_type);
+
+	if (n < 7)
+		return -EINVAL;
+
+	/* The LE_PUBLIC address type is ignored because of BDADDR_ANY */
+	hdev = hci_get_route(addr, BDADDR_ANY, BDADDR_LE_PUBLIC);
+	if (!hdev)
+		return -ENOENT;
+
+	hci_dev_lock(hdev);
+	hcon = hci_conn_hash_lookup_le(hdev, addr, *addr_type);
+	hci_dev_unlock(hdev);
+	hci_dev_put(hdev);
+
+	if (!hcon)
+		return -ENOENT;
+
+	*conn = (struct l2cap_conn *)hcon->l2cap_data;
+
+	BT_DBG("conn %p dst %pMR type %d", *conn, &hcon->dst, hcon->dst_type);
+
+	return 0;
+}
+
+static void disconnect_all_peers(void)
+{
+	struct lowpan_btle_dev *entry;
+	struct lowpan_peer *peer, *tmp_peer, *new_peer;
+	struct list_head peers;
+
+	INIT_LIST_HEAD(&peers);
+
+	/* We make a separate list of peers as the close_cb() will
+	 * modify the device peers list so it is better not to mess
+	 * with the same list at the same time.
+	 */
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(entry, &bt_6lowpan_devices, list) {
+		list_for_each_entry_rcu(peer, &entry->peers, list) {
+			new_peer = kmalloc(sizeof(*new_peer), GFP_ATOMIC);
+			if (!new_peer)
+				break;
+
+			new_peer->chan = peer->chan;
+			INIT_LIST_HEAD(&new_peer->list);
+
+			list_add(&new_peer->list, &peers);
+		}
+	}
+
+	rcu_read_unlock();
+
+	spin_lock(&devices_lock);
+	list_for_each_entry_safe(peer, tmp_peer, &peers, list) {
+		l2cap_chan_close(peer->chan, ENOENT);
+
+		list_del_rcu(&peer->list);
+		kfree_rcu(peer, rcu);
+	}
+	spin_unlock(&devices_lock);
+}
+
+struct set_enable {
+	struct work_struct work;
+	bool flag;
+};
+
+static void do_enable_set(struct work_struct *work)
+{
+	struct set_enable *set_enable = container_of(work,
+						     struct set_enable, work);
+
+	if (!set_enable->flag || enable_6lowpan != set_enable->flag)
+		/* Disconnect existing connections if 6lowpan is
+		 * disabled
+		 */
+		disconnect_all_peers();
+
+	enable_6lowpan = set_enable->flag;
+
+	mutex_lock(&set_lock);
+	if (listen_chan) {
+		l2cap_chan_close(listen_chan, 0);
+		l2cap_chan_put(listen_chan);
+	}
+
+	listen_chan = bt_6lowpan_listen();
+	mutex_unlock(&set_lock);
+
+	kfree(set_enable);
+}
+
+static int lowpan_enable_set(void *data, u64 val)
+{
+	struct set_enable *set_enable;
+
+	set_enable = kzalloc(sizeof(*set_enable), GFP_KERNEL);
+	if (!set_enable)
+		return -ENOMEM;
+
+	set_enable->flag = !!val;
+	INIT_WORK(&set_enable->work, do_enable_set);
+
+	schedule_work(&set_enable->work);
+
+	return 0;
+}
+
+static int lowpan_enable_get(void *data, u64 *val)
+{
+	*val = enable_6lowpan;
+	return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(lowpan_enable_fops, lowpan_enable_get,
+			 lowpan_enable_set, "%llu\n");
+
+static ssize_t lowpan_control_write(struct file *fp,
+				    const char __user *user_buffer,
+				    size_t count,
+				    loff_t *position)
+{
+	char buf[32];
+	size_t buf_size = min(count, sizeof(buf) - 1);
+	int ret;
+	bdaddr_t addr;
+	u8 addr_type;
+	struct l2cap_conn *conn = NULL;
+
+	if (copy_from_user(buf, user_buffer, buf_size))
+		return -EFAULT;
+
+	buf[buf_size] = '\0';
+
+	if (memcmp(buf, "connect ", 8) == 0) {
+		ret = get_l2cap_conn(&buf[8], &addr, &addr_type, &conn);
+		if (ret == -EINVAL)
+			return ret;
+
+		mutex_lock(&set_lock);
+		if (listen_chan) {
+			l2cap_chan_close(listen_chan, 0);
+			l2cap_chan_put(listen_chan);
+			listen_chan = NULL;
+		}
+		mutex_unlock(&set_lock);
+
+		if (conn) {
+			struct lowpan_peer *peer;
+
+			if (!is_bt_6lowpan(conn->hcon))
+				return -EINVAL;
+
+			peer = lookup_peer(conn);
+			if (peer) {
+				BT_DBG("6LoWPAN connection already exists");
+				return -EALREADY;
+			}
+
+			BT_DBG("conn %p dst %pMR type %d user %d", conn,
+			       &conn->hcon->dst, conn->hcon->dst_type,
+			       addr_type);
+		}
+
+		ret = bt_6lowpan_connect(&addr, addr_type);
+		if (ret < 0)
+			return ret;
+
+		return count;
+	}
+
+	if (memcmp(buf, "disconnect ", 11) == 0) {
+		ret = get_l2cap_conn(&buf[11], &addr, &addr_type, &conn);
+		if (ret < 0)
+			return ret;
+
+		ret = bt_6lowpan_disconnect(conn, addr_type);
+		if (ret < 0)
+			return ret;
+
+		return count;
+	}
+
+	return count;
+}
+
+static int lowpan_control_show(struct seq_file *f, void *ptr)
+{
+	struct lowpan_btle_dev *entry;
+	struct lowpan_peer *peer;
+
+	spin_lock(&devices_lock);
+
+	list_for_each_entry(entry, &bt_6lowpan_devices, list) {
+		list_for_each_entry(peer, &entry->peers, list)
+			seq_printf(f, "%pMR (type %u)\n",
+				   &peer->chan->dst, peer->chan->dst_type);
+	}
+
+	spin_unlock(&devices_lock);
+
+	return 0;
+}
+
+static int lowpan_control_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, lowpan_control_show, inode->i_private);
+}
+
+static const struct file_operations lowpan_control_fops = {
+	.open		= lowpan_control_open,
+	.read		= seq_read,
+	.write		= lowpan_control_write,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static void disconnect_devices(void)
+{
+	struct lowpan_btle_dev *entry, *tmp, *new_dev;
+	struct list_head devices;
+
+	INIT_LIST_HEAD(&devices);
+
+	/* We make a separate list of devices because the unregister_netdev()
+	 * will call device_event() which will also want to modify the same
+	 * devices list.
+	 */
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(entry, &bt_6lowpan_devices, list) {
+		new_dev = kmalloc(sizeof(*new_dev), GFP_ATOMIC);
+		if (!new_dev)
+			break;
+
+		new_dev->netdev = entry->netdev;
+		INIT_LIST_HEAD(&new_dev->list);
+
+		list_add_rcu(&new_dev->list, &devices);
+	}
+
+	rcu_read_unlock();
+
+	list_for_each_entry_safe(entry, tmp, &devices, list) {
+		ifdown(entry->netdev);
+		BT_DBG("Unregistering netdev %s %p",
+		       entry->netdev->name, entry->netdev);
+		lowpan_unregister_netdev(entry->netdev);
+		kfree(entry);
+	}
+}
+
+static int device_event(struct notifier_block *unused,
+			unsigned long event, void *ptr)
+{
+	struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
+	struct lowpan_btle_dev *entry;
+
+	if (netdev->type != ARPHRD_6LOWPAN)
+		return NOTIFY_DONE;
+
+	switch (event) {
+	case NETDEV_UNREGISTER:
+		spin_lock(&devices_lock);
+		list_for_each_entry(entry, &bt_6lowpan_devices, list) {
+			if (entry->netdev == netdev) {
+				BT_DBG("Unregistered netdev %s %p",
+				       netdev->name, netdev);
+				list_del(&entry->list);
+				break;
+			}
+		}
+		spin_unlock(&devices_lock);
+		break;
+	}
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block bt_6lowpan_dev_notifier = {
+	.notifier_call = device_event,
+};
+
+static int __init bt_6lowpan_init(void)
+{
+	lowpan_enable_debugfs = debugfs_create_file_unsafe("6lowpan_enable",
+							   0644, bt_debugfs,
+							   NULL,
+							   &lowpan_enable_fops);
+	lowpan_control_debugfs = debugfs_create_file("6lowpan_control", 0644,
+						     bt_debugfs, NULL,
+						     &lowpan_control_fops);
+
+	return register_netdevice_notifier(&bt_6lowpan_dev_notifier);
+}
+
+static void __exit bt_6lowpan_exit(void)
+{
+	debugfs_remove(lowpan_enable_debugfs);
+	debugfs_remove(lowpan_control_debugfs);
+
+	if (listen_chan) {
+		l2cap_chan_close(listen_chan, 0);
+		l2cap_chan_put(listen_chan);
+	}
+
+	disconnect_devices();
+
+	unregister_netdevice_notifier(&bt_6lowpan_dev_notifier);
+}
+
+module_init(bt_6lowpan_init);
+module_exit(bt_6lowpan_exit);
+
+MODULE_AUTHOR("Jukka Rissanen <jukka.rissanen@linux.intel.com>");
+MODULE_DESCRIPTION("Bluetooth 6LoWPAN");
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
diff --git a/net/bluetooth/Kconfig b/net/bluetooth/Kconfig
new file mode 100644
index 000000000..64e669acd
--- /dev/null
+++ b/net/bluetooth/Kconfig
@@ -0,0 +1,144 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Bluetooth subsystem configuration
+#
+
+menuconfig BT
+	tristate "Bluetooth subsystem support"
+	depends on NET && !S390
+	depends on RFKILL || !RFKILL
+	select CRC16
+	select CRYPTO
+	select CRYPTO_SKCIPHER
+	select CRYPTO_LIB_AES
+	imply CRYPTO_AES
+	select CRYPTO_CMAC
+	select CRYPTO_ECB
+	select CRYPTO_SHA256
+	select CRYPTO_ECDH
+	help
+	  Bluetooth is low-cost, low-power, short-range wireless technology.
+	  It was designed as a replacement for cables and other short-range
+	  technologies like IrDA.  Bluetooth operates in personal area range
+	  that typically extends up to 10 meters.  More information about
+	  Bluetooth can be found at <https://www.bluetooth.com/>.
+
+	  Linux Bluetooth subsystem consist of several layers:
+	     Bluetooth Core
+		HCI device and connection manager, scheduler
+		SCO audio links
+		L2CAP (Logical Link Control and Adaptation Protocol)
+		SMP (Security Manager Protocol) on LE (Low Energy) links
+	     HCI Device drivers (Interface to the hardware)
+	     RFCOMM Module (RFCOMM Protocol)  
+	     BNEP Module (Bluetooth Network Encapsulation Protocol)
+	     CMTP Module (CAPI Message Transport Protocol)
+	     HIDP Module (Human Interface Device Protocol)
+
+	  Say Y here to compile Bluetooth support into the kernel or say M to
+	  compile it as module (bluetooth).
+
+	  To use Linux Bluetooth subsystem, you will need several user-space
+	  utilities like hciconfig and bluetoothd.  These utilities and updates
+	  to Bluetooth kernel modules are provided in the BlueZ packages.  For
+	  more information, see <http://www.bluez.org/>.
+
+config BT_BREDR
+	bool "Bluetooth Classic (BR/EDR) features"
+	depends on BT
+	default y
+	help
+	  Bluetooth Classic includes support for Basic Rate (BR)
+	  available with Bluetooth version 1.0b or later and support
+	  for Enhanced Data Rate (EDR) available with Bluetooth
+	  version 2.0 or later.
+
+source "net/bluetooth/rfcomm/Kconfig"
+
+source "net/bluetooth/bnep/Kconfig"
+
+source "net/bluetooth/cmtp/Kconfig"
+
+source "net/bluetooth/hidp/Kconfig"
+
+config BT_HS
+	bool "Bluetooth High Speed (HS) features"
+	depends on BT_BREDR
+	help
+	  Bluetooth High Speed includes support for off-loading
+	  Bluetooth connections via 802.11 (wifi) physical layer
+	  available with Bluetooth version 3.0 or later.
+
+config BT_LE
+	bool "Bluetooth Low Energy (LE) features"
+	depends on BT
+	default y
+	help
+	  Bluetooth Low Energy includes support low-energy physical
+	  layer available with Bluetooth version 4.0 or later.
+
+config BT_6LOWPAN
+	tristate "Bluetooth 6LoWPAN support"
+	depends on BT_LE && 6LOWPAN
+	help
+	  IPv6 compression over Bluetooth Low Energy.
+
+config BT_LEDS
+	bool "Enable LED triggers"
+	depends on BT
+	depends on LEDS_CLASS
+	select LEDS_TRIGGERS
+	help
+	  This option selects a few LED triggers for different
+	  Bluetooth events.
+
+config BT_MSFTEXT
+	bool "Enable Microsoft extensions"
+	depends on BT
+	help
+	  This options enables support for the Microsoft defined HCI
+	  vendor extensions.
+
+config BT_DEBUGFS
+	bool "Export Bluetooth internals in debugfs"
+	depends on BT && DEBUG_FS
+	default y
+	help
+	  Provide extensive information about internal Bluetooth states
+	  in debugfs.
+
+config BT_SELFTEST
+	bool "Bluetooth self testing support"
+	depends on BT && DEBUG_KERNEL
+	help
+	  Run self tests when initializing the Bluetooth subsystem.  This
+	  is a developer option and can cause significant delay when booting
+	  the system.
+
+	  When the Bluetooth subsystem is built as module, then the test
+	  cases are run first thing at module load time.  When the Bluetooth
+	  subsystem is compiled into the kernel image, then the test cases
+	  are run late in the initcall hierarchy.
+
+config BT_SELFTEST_ECDH
+	bool "ECDH test cases"
+	depends on BT_LE && BT_SELFTEST
+	help
+	  Run test cases for ECDH cryptographic functionality used by the
+	  Bluetooth Low Energy Secure Connections feature.
+
+config BT_SELFTEST_SMP
+	bool "SMP test cases"
+	depends on BT_LE && BT_SELFTEST
+	help
+	  Run test cases for SMP cryptographic functionality, including both
+	  legacy SMP as well as the Secure Connections features.
+
+config BT_FEATURE_DEBUG
+	bool "Enable runtime option for debugging statements"
+	depends on BT && !DYNAMIC_DEBUG
+	help
+	  This provides an option to enable/disable debugging statements
+	  at runtime via the experimental features interface.
+
+source "drivers/bluetooth/Kconfig"
diff --git a/net/bluetooth/Makefile b/net/bluetooth/Makefile
new file mode 100644
index 000000000..1c645fba8
--- /dev/null
+++ b/net/bluetooth/Makefile
@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Linux Bluetooth subsystem.
+#
+
+obj-$(CONFIG_BT)	+= bluetooth.o
+obj-$(CONFIG_BT_RFCOMM)	+= rfcomm/
+obj-$(CONFIG_BT_BNEP)	+= bnep/
+obj-$(CONFIG_BT_CMTP)	+= cmtp/
+obj-$(CONFIG_BT_HIDP)	+= hidp/
+obj-$(CONFIG_BT_6LOWPAN) += bluetooth_6lowpan.o
+
+bluetooth_6lowpan-y := 6lowpan.o
+
+bluetooth-y := af_bluetooth.o hci_core.o hci_conn.o hci_event.o mgmt.o \
+	hci_sock.o hci_sysfs.o l2cap_core.o l2cap_sock.o smp.o lib.o \
+	ecdh_helper.o hci_request.o mgmt_util.o mgmt_config.o
+
+bluetooth-$(CONFIG_BT_BREDR) += sco.o
+bluetooth-$(CONFIG_BT_HS) += a2mp.o amp.o
+bluetooth-$(CONFIG_BT_LEDS) += leds.o
+bluetooth-$(CONFIG_BT_MSFTEXT) += msft.o
+bluetooth-$(CONFIG_BT_DEBUGFS) += hci_debugfs.o
+bluetooth-$(CONFIG_BT_SELFTEST) += selftest.o
diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c
new file mode 100644
index 000000000..463bad584
--- /dev/null
+++ b/net/bluetooth/a2mp.c
@@ -0,0 +1,1054 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+   Copyright (c) 2010,2011 Code Aurora Forum.  All rights reserved.
+   Copyright (c) 2011,2012 Intel Corp.
+
+*/
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/l2cap.h>
+
+#include "hci_request.h"
+#include "a2mp.h"
+#include "amp.h"
+
+#define A2MP_FEAT_EXT	0x8000
+
+/* Global AMP Manager list */
+static LIST_HEAD(amp_mgr_list);
+static DEFINE_MUTEX(amp_mgr_list_lock);
+
+/* A2MP build & send command helper functions */
+static struct a2mp_cmd *__a2mp_build(u8 code, u8 ident, u16 len, void *data)
+{
+	struct a2mp_cmd *cmd;
+	int plen;
+
+	plen = sizeof(*cmd) + len;
+	cmd = kzalloc(plen, GFP_KERNEL);
+	if (!cmd)
+		return NULL;
+
+	cmd->code = code;
+	cmd->ident = ident;
+	cmd->len = cpu_to_le16(len);
+
+	memcpy(cmd->data, data, len);
+
+	return cmd;
+}
+
+static void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len, void *data)
+{
+	struct l2cap_chan *chan = mgr->a2mp_chan;
+	struct a2mp_cmd *cmd;
+	u16 total_len = len + sizeof(*cmd);
+	struct kvec iv;
+	struct msghdr msg;
+
+	cmd = __a2mp_build(code, ident, len, data);
+	if (!cmd)
+		return;
+
+	iv.iov_base = cmd;
+	iv.iov_len = total_len;
+
+	memset(&msg, 0, sizeof(msg));
+
+	iov_iter_kvec(&msg.msg_iter, WRITE, &iv, 1, total_len);
+
+	l2cap_chan_send(chan, &msg, total_len);
+
+	kfree(cmd);
+}
+
+static u8 __next_ident(struct amp_mgr *mgr)
+{
+	if (++mgr->ident == 0)
+		mgr->ident = 1;
+
+	return mgr->ident;
+}
+
+static struct amp_mgr *amp_mgr_lookup_by_state(u8 state)
+{
+	struct amp_mgr *mgr;
+
+	mutex_lock(&amp_mgr_list_lock);
+	list_for_each_entry(mgr, &amp_mgr_list, list) {
+		if (test_and_clear_bit(state, &mgr->state)) {
+			amp_mgr_get(mgr);
+			mutex_unlock(&amp_mgr_list_lock);
+			return mgr;
+		}
+	}
+	mutex_unlock(&amp_mgr_list_lock);
+
+	return NULL;
+}
+
+/* hci_dev_list shall be locked */
+static void __a2mp_add_cl(struct amp_mgr *mgr, struct a2mp_cl *cl)
+{
+	struct hci_dev *hdev;
+	int i = 1;
+
+	cl[0].id = AMP_ID_BREDR;
+	cl[0].type = AMP_TYPE_BREDR;
+	cl[0].status = AMP_STATUS_BLUETOOTH_ONLY;
+
+	list_for_each_entry(hdev, &hci_dev_list, list) {
+		if (hdev->dev_type == HCI_AMP) {
+			cl[i].id = hdev->id;
+			cl[i].type = hdev->amp_type;
+			if (test_bit(HCI_UP, &hdev->flags))
+				cl[i].status = hdev->amp_status;
+			else
+				cl[i].status = AMP_STATUS_POWERED_DOWN;
+			i++;
+		}
+	}
+}
+
+/* Processing A2MP messages */
+static int a2mp_command_rej(struct amp_mgr *mgr, struct sk_buff *skb,
+			    struct a2mp_cmd *hdr)
+{
+	struct a2mp_cmd_rej *rej = (void *) skb->data;
+
+	if (le16_to_cpu(hdr->len) < sizeof(*rej))
+		return -EINVAL;
+
+	BT_DBG("ident %d reason %d", hdr->ident, le16_to_cpu(rej->reason));
+
+	skb_pull(skb, sizeof(*rej));
+
+	return 0;
+}
+
+static int a2mp_discover_req(struct amp_mgr *mgr, struct sk_buff *skb,
+			     struct a2mp_cmd *hdr)
+{
+	struct a2mp_discov_req *req = (void *) skb->data;
+	u16 len = le16_to_cpu(hdr->len);
+	struct a2mp_discov_rsp *rsp;
+	u16 ext_feat;
+	u8 num_ctrl;
+	struct hci_dev *hdev;
+
+	if (len < sizeof(*req))
+		return -EINVAL;
+
+	skb_pull(skb, sizeof(*req));
+
+	ext_feat = le16_to_cpu(req->ext_feat);
+
+	BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(req->mtu), ext_feat);
+
+	/* check that packet is not broken for now */
+	while (ext_feat & A2MP_FEAT_EXT) {
+		if (len < sizeof(ext_feat))
+			return -EINVAL;
+
+		ext_feat = get_unaligned_le16(skb->data);
+		BT_DBG("efm 0x%4.4x", ext_feat);
+		len -= sizeof(ext_feat);
+		skb_pull(skb, sizeof(ext_feat));
+	}
+
+	read_lock(&hci_dev_list_lock);
+
+	/* at minimum the BR/EDR needs to be listed */
+	num_ctrl = 1;
+
+	list_for_each_entry(hdev, &hci_dev_list, list) {
+		if (hdev->dev_type == HCI_AMP)
+			num_ctrl++;
+	}
+
+	len = struct_size(rsp, cl, num_ctrl);
+	rsp = kmalloc(len, GFP_ATOMIC);
+	if (!rsp) {
+		read_unlock(&hci_dev_list_lock);
+		return -ENOMEM;
+	}
+
+	rsp->mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU);
+	rsp->ext_feat = 0;
+
+	__a2mp_add_cl(mgr, rsp->cl);
+
+	read_unlock(&hci_dev_list_lock);
+
+	a2mp_send(mgr, A2MP_DISCOVER_RSP, hdr->ident, len, rsp);
+
+	kfree(rsp);
+	return 0;
+}
+
+static int a2mp_discover_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
+			     struct a2mp_cmd *hdr)
+{
+	struct a2mp_discov_rsp *rsp = (void *) skb->data;
+	u16 len = le16_to_cpu(hdr->len);
+	struct a2mp_cl *cl;
+	u16 ext_feat;
+	bool found = false;
+
+	if (len < sizeof(*rsp))
+		return -EINVAL;
+
+	len -= sizeof(*rsp);
+	skb_pull(skb, sizeof(*rsp));
+
+	ext_feat = le16_to_cpu(rsp->ext_feat);
+
+	BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(rsp->mtu), ext_feat);
+
+	/* check that packet is not broken for now */
+	while (ext_feat & A2MP_FEAT_EXT) {
+		if (len < sizeof(ext_feat))
+			return -EINVAL;
+
+		ext_feat = get_unaligned_le16(skb->data);
+		BT_DBG("efm 0x%4.4x", ext_feat);
+		len -= sizeof(ext_feat);
+		skb_pull(skb, sizeof(ext_feat));
+	}
+
+	cl = (void *) skb->data;
+	while (len >= sizeof(*cl)) {
+		BT_DBG("Remote AMP id %d type %d status %d", cl->id, cl->type,
+		       cl->status);
+
+		if (cl->id != AMP_ID_BREDR && cl->type != AMP_TYPE_BREDR) {
+			struct a2mp_info_req req;
+
+			found = true;
+
+			memset(&req, 0, sizeof(req));
+
+			req.id = cl->id;
+			a2mp_send(mgr, A2MP_GETINFO_REQ, __next_ident(mgr),
+				  sizeof(req), &req);
+		}
+
+		len -= sizeof(*cl);
+		cl = skb_pull(skb, sizeof(*cl));
+	}
+
+	/* Fall back to L2CAP init sequence */
+	if (!found) {
+		struct l2cap_conn *conn = mgr->l2cap_conn;
+		struct l2cap_chan *chan;
+
+		mutex_lock(&conn->chan_lock);
+
+		list_for_each_entry(chan, &conn->chan_l, list) {
+
+			BT_DBG("chan %p state %s", chan,
+			       state_to_string(chan->state));
+
+			if (chan->scid == L2CAP_CID_A2MP)
+				continue;
+
+			l2cap_chan_lock(chan);
+
+			if (chan->state == BT_CONNECT)
+				l2cap_send_conn_req(chan);
+
+			l2cap_chan_unlock(chan);
+		}
+
+		mutex_unlock(&conn->chan_lock);
+	}
+
+	return 0;
+}
+
+static int a2mp_change_notify(struct amp_mgr *mgr, struct sk_buff *skb,
+			      struct a2mp_cmd *hdr)
+{
+	struct a2mp_cl *cl = (void *) skb->data;
+
+	while (skb->len >= sizeof(*cl)) {
+		BT_DBG("Controller id %d type %d status %d", cl->id, cl->type,
+		       cl->status);
+		cl = skb_pull(skb, sizeof(*cl));
+	}
+
+	/* TODO send A2MP_CHANGE_RSP */
+
+	return 0;
+}
+
+static void read_local_amp_info_complete(struct hci_dev *hdev, u8 status,
+					 u16 opcode)
+{
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	a2mp_send_getinfo_rsp(hdev);
+}
+
+static int a2mp_getinfo_req(struct amp_mgr *mgr, struct sk_buff *skb,
+			    struct a2mp_cmd *hdr)
+{
+	struct a2mp_info_req *req  = (void *) skb->data;
+	struct hci_dev *hdev;
+	struct hci_request hreq;
+	int err = 0;
+
+	if (le16_to_cpu(hdr->len) < sizeof(*req))
+		return -EINVAL;
+
+	BT_DBG("id %d", req->id);
+
+	hdev = hci_dev_get(req->id);
+	if (!hdev || hdev->dev_type != HCI_AMP) {
+		struct a2mp_info_rsp rsp;
+
+		memset(&rsp, 0, sizeof(rsp));
+
+		rsp.id = req->id;
+		rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
+
+		a2mp_send(mgr, A2MP_GETINFO_RSP, hdr->ident, sizeof(rsp),
+			  &rsp);
+
+		goto done;
+	}
+
+	set_bit(READ_LOC_AMP_INFO, &mgr->state);
+	hci_req_init(&hreq, hdev);
+	hci_req_add(&hreq, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
+	err = hci_req_run(&hreq, read_local_amp_info_complete);
+	if (err < 0)
+		a2mp_send_getinfo_rsp(hdev);
+
+done:
+	if (hdev)
+		hci_dev_put(hdev);
+
+	skb_pull(skb, sizeof(*req));
+	return 0;
+}
+
+static int a2mp_getinfo_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
+			    struct a2mp_cmd *hdr)
+{
+	struct a2mp_info_rsp *rsp = (struct a2mp_info_rsp *) skb->data;
+	struct a2mp_amp_assoc_req req;
+	struct amp_ctrl *ctrl;
+
+	if (le16_to_cpu(hdr->len) < sizeof(*rsp))
+		return -EINVAL;
+
+	BT_DBG("id %d status 0x%2.2x", rsp->id, rsp->status);
+
+	if (rsp->status)
+		return -EINVAL;
+
+	ctrl = amp_ctrl_add(mgr, rsp->id);
+	if (!ctrl)
+		return -ENOMEM;
+
+	memset(&req, 0, sizeof(req));
+
+	req.id = rsp->id;
+	a2mp_send(mgr, A2MP_GETAMPASSOC_REQ, __next_ident(mgr), sizeof(req),
+		  &req);
+
+	skb_pull(skb, sizeof(*rsp));
+	return 0;
+}
+
+static int a2mp_getampassoc_req(struct amp_mgr *mgr, struct sk_buff *skb,
+				struct a2mp_cmd *hdr)
+{
+	struct a2mp_amp_assoc_req *req = (void *) skb->data;
+	struct hci_dev *hdev;
+	struct amp_mgr *tmp;
+
+	if (le16_to_cpu(hdr->len) < sizeof(*req))
+		return -EINVAL;
+
+	BT_DBG("id %d", req->id);
+
+	/* Make sure that other request is not processed */
+	tmp = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC);
+
+	hdev = hci_dev_get(req->id);
+	if (!hdev || hdev->amp_type == AMP_TYPE_BREDR || tmp) {
+		struct a2mp_amp_assoc_rsp rsp;
+
+		memset(&rsp, 0, sizeof(rsp));
+		rsp.id = req->id;
+
+		if (tmp) {
+			rsp.status = A2MP_STATUS_COLLISION_OCCURED;
+			amp_mgr_put(tmp);
+		} else {
+			rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
+		}
+
+		a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, hdr->ident, sizeof(rsp),
+			  &rsp);
+
+		goto done;
+	}
+
+	amp_read_loc_assoc(hdev, mgr);
+
+done:
+	if (hdev)
+		hci_dev_put(hdev);
+
+	skb_pull(skb, sizeof(*req));
+	return 0;
+}
+
+static int a2mp_getampassoc_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
+				struct a2mp_cmd *hdr)
+{
+	struct a2mp_amp_assoc_rsp *rsp = (void *) skb->data;
+	u16 len = le16_to_cpu(hdr->len);
+	struct hci_dev *hdev;
+	struct amp_ctrl *ctrl;
+	struct hci_conn *hcon;
+	size_t assoc_len;
+
+	if (len < sizeof(*rsp))
+		return -EINVAL;
+
+	assoc_len = len - sizeof(*rsp);
+
+	BT_DBG("id %d status 0x%2.2x assoc len %zu", rsp->id, rsp->status,
+	       assoc_len);
+
+	if (rsp->status)
+		return -EINVAL;
+
+	/* Save remote ASSOC data */
+	ctrl = amp_ctrl_lookup(mgr, rsp->id);
+	if (ctrl) {
+		u8 *assoc;
+
+		assoc = kmemdup(rsp->amp_assoc, assoc_len, GFP_KERNEL);
+		if (!assoc) {
+			amp_ctrl_put(ctrl);
+			return -ENOMEM;
+		}
+
+		ctrl->assoc = assoc;
+		ctrl->assoc_len = assoc_len;
+		ctrl->assoc_rem_len = assoc_len;
+		ctrl->assoc_len_so_far = 0;
+
+		amp_ctrl_put(ctrl);
+	}
+
+	/* Create Phys Link */
+	hdev = hci_dev_get(rsp->id);
+	if (!hdev)
+		return -EINVAL;
+
+	hcon = phylink_add(hdev, mgr, rsp->id, true);
+	if (!hcon)
+		goto done;
+
+	BT_DBG("Created hcon %p: loc:%d -> rem:%d", hcon, hdev->id, rsp->id);
+
+	mgr->bredr_chan->remote_amp_id = rsp->id;
+
+	amp_create_phylink(hdev, mgr, hcon);
+
+done:
+	hci_dev_put(hdev);
+	skb_pull(skb, len);
+	return 0;
+}
+
+static int a2mp_createphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
+				   struct a2mp_cmd *hdr)
+{
+	struct a2mp_physlink_req *req = (void *) skb->data;
+	struct a2mp_physlink_rsp rsp;
+	struct hci_dev *hdev;
+	struct hci_conn *hcon;
+	struct amp_ctrl *ctrl;
+
+	if (le16_to_cpu(hdr->len) < sizeof(*req))
+		return -EINVAL;
+
+	BT_DBG("local_id %d, remote_id %d", req->local_id, req->remote_id);
+
+	memset(&rsp, 0, sizeof(rsp));
+
+	rsp.local_id = req->remote_id;
+	rsp.remote_id = req->local_id;
+
+	hdev = hci_dev_get(req->remote_id);
+	if (!hdev || hdev->amp_type == AMP_TYPE_BREDR) {
+		rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
+		goto send_rsp;
+	}
+
+	ctrl = amp_ctrl_lookup(mgr, rsp.remote_id);
+	if (!ctrl) {
+		ctrl = amp_ctrl_add(mgr, rsp.remote_id);
+		if (ctrl) {
+			amp_ctrl_get(ctrl);
+		} else {
+			rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
+			goto send_rsp;
+		}
+	}
+
+	if (ctrl) {
+		size_t assoc_len = le16_to_cpu(hdr->len) - sizeof(*req);
+		u8 *assoc;
+
+		assoc = kmemdup(req->amp_assoc, assoc_len, GFP_KERNEL);
+		if (!assoc) {
+			amp_ctrl_put(ctrl);
+			hci_dev_put(hdev);
+			return -ENOMEM;
+		}
+
+		ctrl->assoc = assoc;
+		ctrl->assoc_len = assoc_len;
+		ctrl->assoc_rem_len = assoc_len;
+		ctrl->assoc_len_so_far = 0;
+
+		amp_ctrl_put(ctrl);
+	}
+
+	hcon = phylink_add(hdev, mgr, req->local_id, false);
+	if (hcon) {
+		amp_accept_phylink(hdev, mgr, hcon);
+		rsp.status = A2MP_STATUS_SUCCESS;
+	} else {
+		rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
+	}
+
+send_rsp:
+	if (hdev)
+		hci_dev_put(hdev);
+
+	/* Reply error now and success after HCI Write Remote AMP Assoc
+	   command complete with success status
+	 */
+	if (rsp.status != A2MP_STATUS_SUCCESS) {
+		a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident,
+			  sizeof(rsp), &rsp);
+	} else {
+		set_bit(WRITE_REMOTE_AMP_ASSOC, &mgr->state);
+		mgr->ident = hdr->ident;
+	}
+
+	skb_pull(skb, le16_to_cpu(hdr->len));
+	return 0;
+}
+
+static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
+				 struct a2mp_cmd *hdr)
+{
+	struct a2mp_physlink_req *req = (void *) skb->data;
+	struct a2mp_physlink_rsp rsp;
+	struct hci_dev *hdev;
+	struct hci_conn *hcon;
+
+	if (le16_to_cpu(hdr->len) < sizeof(*req))
+		return -EINVAL;
+
+	BT_DBG("local_id %d remote_id %d", req->local_id, req->remote_id);
+
+	memset(&rsp, 0, sizeof(rsp));
+
+	rsp.local_id = req->remote_id;
+	rsp.remote_id = req->local_id;
+	rsp.status = A2MP_STATUS_SUCCESS;
+
+	hdev = hci_dev_get(req->remote_id);
+	if (!hdev) {
+		rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
+		goto send_rsp;
+	}
+
+	hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK,
+				       &mgr->l2cap_conn->hcon->dst);
+	if (!hcon) {
+		bt_dev_err(hdev, "no phys link exist");
+		rsp.status = A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS;
+		goto clean;
+	}
+
+	/* TODO Disconnect Phys Link here */
+
+clean:
+	hci_dev_put(hdev);
+
+send_rsp:
+	a2mp_send(mgr, A2MP_DISCONNPHYSLINK_RSP, hdr->ident, sizeof(rsp), &rsp);
+
+	skb_pull(skb, sizeof(*req));
+	return 0;
+}
+
+static inline int a2mp_cmd_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
+			       struct a2mp_cmd *hdr)
+{
+	BT_DBG("ident %d code 0x%2.2x", hdr->ident, hdr->code);
+
+	skb_pull(skb, le16_to_cpu(hdr->len));
+	return 0;
+}
+
+/* Handle A2MP signalling */
+static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb)
+{
+	struct a2mp_cmd *hdr;
+	struct amp_mgr *mgr = chan->data;
+	int err = 0;
+
+	amp_mgr_get(mgr);
+
+	while (skb->len >= sizeof(*hdr)) {
+		u16 len;
+
+		hdr = (void *) skb->data;
+		len = le16_to_cpu(hdr->len);
+
+		BT_DBG("code 0x%2.2x id %d len %u", hdr->code, hdr->ident, len);
+
+		skb_pull(skb, sizeof(*hdr));
+
+		if (len > skb->len || !hdr->ident) {
+			err = -EINVAL;
+			break;
+		}
+
+		mgr->ident = hdr->ident;
+
+		switch (hdr->code) {
+		case A2MP_COMMAND_REJ:
+			a2mp_command_rej(mgr, skb, hdr);
+			break;
+
+		case A2MP_DISCOVER_REQ:
+			err = a2mp_discover_req(mgr, skb, hdr);
+			break;
+
+		case A2MP_CHANGE_NOTIFY:
+			err = a2mp_change_notify(mgr, skb, hdr);
+			break;
+
+		case A2MP_GETINFO_REQ:
+			err = a2mp_getinfo_req(mgr, skb, hdr);
+			break;
+
+		case A2MP_GETAMPASSOC_REQ:
+			err = a2mp_getampassoc_req(mgr, skb, hdr);
+			break;
+
+		case A2MP_CREATEPHYSLINK_REQ:
+			err = a2mp_createphyslink_req(mgr, skb, hdr);
+			break;
+
+		case A2MP_DISCONNPHYSLINK_REQ:
+			err = a2mp_discphyslink_req(mgr, skb, hdr);
+			break;
+
+		case A2MP_DISCOVER_RSP:
+			err = a2mp_discover_rsp(mgr, skb, hdr);
+			break;
+
+		case A2MP_GETINFO_RSP:
+			err = a2mp_getinfo_rsp(mgr, skb, hdr);
+			break;
+
+		case A2MP_GETAMPASSOC_RSP:
+			err = a2mp_getampassoc_rsp(mgr, skb, hdr);
+			break;
+
+		case A2MP_CHANGE_RSP:
+		case A2MP_CREATEPHYSLINK_RSP:
+		case A2MP_DISCONNPHYSLINK_RSP:
+			err = a2mp_cmd_rsp(mgr, skb, hdr);
+			break;
+
+		default:
+			BT_ERR("Unknown A2MP sig cmd 0x%2.2x", hdr->code);
+			err = -EINVAL;
+			break;
+		}
+	}
+
+	if (err) {
+		struct a2mp_cmd_rej rej;
+
+		memset(&rej, 0, sizeof(rej));
+
+		rej.reason = cpu_to_le16(0);
+		hdr = (void *) skb->data;
+
+		BT_DBG("Send A2MP Rej: cmd 0x%2.2x err %d", hdr->code, err);
+
+		a2mp_send(mgr, A2MP_COMMAND_REJ, hdr->ident, sizeof(rej),
+			  &rej);
+	}
+
+	/* Always free skb and return success error code to prevent
+	   from sending L2CAP Disconnect over A2MP channel */
+	kfree_skb(skb);
+
+	amp_mgr_put(mgr);
+
+	return 0;
+}
+
+static void a2mp_chan_close_cb(struct l2cap_chan *chan)
+{
+	l2cap_chan_put(chan);
+}
+
+static void a2mp_chan_state_change_cb(struct l2cap_chan *chan, int state,
+				      int err)
+{
+	struct amp_mgr *mgr = chan->data;
+
+	if (!mgr)
+		return;
+
+	BT_DBG("chan %p state %s", chan, state_to_string(state));
+
+	chan->state = state;
+
+	switch (state) {
+	case BT_CLOSED:
+		if (mgr)
+			amp_mgr_put(mgr);
+		break;
+	}
+}
+
+static struct sk_buff *a2mp_chan_alloc_skb_cb(struct l2cap_chan *chan,
+					      unsigned long hdr_len,
+					      unsigned long len, int nb)
+{
+	struct sk_buff *skb;
+
+	skb = bt_skb_alloc(hdr_len + len, GFP_KERNEL);
+	if (!skb)
+		return ERR_PTR(-ENOMEM);
+
+	return skb;
+}
+
+static const struct l2cap_ops a2mp_chan_ops = {
+	.name = "L2CAP A2MP channel",
+	.recv = a2mp_chan_recv_cb,
+	.close = a2mp_chan_close_cb,
+	.state_change = a2mp_chan_state_change_cb,
+	.alloc_skb = a2mp_chan_alloc_skb_cb,
+
+	/* Not implemented for A2MP */
+	.new_connection = l2cap_chan_no_new_connection,
+	.teardown = l2cap_chan_no_teardown,
+	.ready = l2cap_chan_no_ready,
+	.defer = l2cap_chan_no_defer,
+	.resume = l2cap_chan_no_resume,
+	.set_shutdown = l2cap_chan_no_set_shutdown,
+	.get_sndtimeo = l2cap_chan_no_get_sndtimeo,
+};
+
+static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn, bool locked)
+{
+	struct l2cap_chan *chan;
+	int err;
+
+	chan = l2cap_chan_create();
+	if (!chan)
+		return NULL;
+
+	BT_DBG("chan %p", chan);
+
+	chan->chan_type = L2CAP_CHAN_FIXED;
+	chan->scid = L2CAP_CID_A2MP;
+	chan->dcid = L2CAP_CID_A2MP;
+	chan->omtu = L2CAP_A2MP_DEFAULT_MTU;
+	chan->imtu = L2CAP_A2MP_DEFAULT_MTU;
+	chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;
+
+	chan->ops = &a2mp_chan_ops;
+
+	l2cap_chan_set_defaults(chan);
+	chan->remote_max_tx = chan->max_tx;
+	chan->remote_tx_win = chan->tx_win;
+
+	chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO;
+	chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO;
+
+	skb_queue_head_init(&chan->tx_q);
+
+	chan->mode = L2CAP_MODE_ERTM;
+
+	err = l2cap_ertm_init(chan);
+	if (err < 0) {
+		l2cap_chan_del(chan, 0);
+		return NULL;
+	}
+
+	chan->conf_state = 0;
+
+	if (locked)
+		__l2cap_chan_add(conn, chan);
+	else
+		l2cap_chan_add(conn, chan);
+
+	chan->remote_mps = chan->omtu;
+	chan->mps = chan->omtu;
+
+	chan->state = BT_CONNECTED;
+
+	return chan;
+}
+
+/* AMP Manager functions */
+struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr)
+{
+	BT_DBG("mgr %p orig refcnt %d", mgr, kref_read(&mgr->kref));
+
+	kref_get(&mgr->kref);
+
+	return mgr;
+}
+
+static void amp_mgr_destroy(struct kref *kref)
+{
+	struct amp_mgr *mgr = container_of(kref, struct amp_mgr, kref);
+
+	BT_DBG("mgr %p", mgr);
+
+	mutex_lock(&amp_mgr_list_lock);
+	list_del(&mgr->list);
+	mutex_unlock(&amp_mgr_list_lock);
+
+	amp_ctrl_list_flush(mgr);
+	kfree(mgr);
+}
+
+int amp_mgr_put(struct amp_mgr *mgr)
+{
+	BT_DBG("mgr %p orig refcnt %d", mgr, kref_read(&mgr->kref));
+
+	return kref_put(&mgr->kref, &amp_mgr_destroy);
+}
+
+static struct amp_mgr *amp_mgr_create(struct l2cap_conn *conn, bool locked)
+{
+	struct amp_mgr *mgr;
+	struct l2cap_chan *chan;
+
+	mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
+	if (!mgr)
+		return NULL;
+
+	BT_DBG("conn %p mgr %p", conn, mgr);
+
+	mgr->l2cap_conn = conn;
+
+	chan = a2mp_chan_open(conn, locked);
+	if (!chan) {
+		kfree(mgr);
+		return NULL;
+	}
+
+	mgr->a2mp_chan = chan;
+	chan->data = mgr;
+
+	conn->hcon->amp_mgr = mgr;
+
+	kref_init(&mgr->kref);
+
+	/* Remote AMP ctrl list initialization */
+	INIT_LIST_HEAD(&mgr->amp_ctrls);
+	mutex_init(&mgr->amp_ctrls_lock);
+
+	mutex_lock(&amp_mgr_list_lock);
+	list_add(&mgr->list, &amp_mgr_list);
+	mutex_unlock(&amp_mgr_list_lock);
+
+	return mgr;
+}
+
+struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
+				       struct sk_buff *skb)
+{
+	struct amp_mgr *mgr;
+
+	if (conn->hcon->type != ACL_LINK)
+		return NULL;
+
+	mgr = amp_mgr_create(conn, false);
+	if (!mgr) {
+		BT_ERR("Could not create AMP manager");
+		return NULL;
+	}
+
+	BT_DBG("mgr: %p chan %p", mgr, mgr->a2mp_chan);
+
+	return mgr->a2mp_chan;
+}
+
+void a2mp_send_getinfo_rsp(struct hci_dev *hdev)
+{
+	struct amp_mgr *mgr;
+	struct a2mp_info_rsp rsp;
+
+	mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_INFO);
+	if (!mgr)
+		return;
+
+	BT_DBG("%s mgr %p", hdev->name, mgr);
+
+	memset(&rsp, 0, sizeof(rsp));
+
+	rsp.id = hdev->id;
+	rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
+
+	if (hdev->amp_type != AMP_TYPE_BREDR) {
+		rsp.status = 0;
+		rsp.total_bw = cpu_to_le32(hdev->amp_total_bw);
+		rsp.max_bw = cpu_to_le32(hdev->amp_max_bw);
+		rsp.min_latency = cpu_to_le32(hdev->amp_min_latency);
+		rsp.pal_cap = cpu_to_le16(hdev->amp_pal_cap);
+		rsp.assoc_size = cpu_to_le16(hdev->amp_assoc_size);
+	}
+
+	a2mp_send(mgr, A2MP_GETINFO_RSP, mgr->ident, sizeof(rsp), &rsp);
+	amp_mgr_put(mgr);
+}
+
+void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status)
+{
+	struct amp_mgr *mgr;
+	struct amp_assoc *loc_assoc = &hdev->loc_assoc;
+	struct a2mp_amp_assoc_rsp *rsp;
+	size_t len;
+
+	mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC);
+	if (!mgr)
+		return;
+
+	BT_DBG("%s mgr %p", hdev->name, mgr);
+
+	len = sizeof(struct a2mp_amp_assoc_rsp) + loc_assoc->len;
+	rsp = kzalloc(len, GFP_KERNEL);
+	if (!rsp) {
+		amp_mgr_put(mgr);
+		return;
+	}
+
+	rsp->id = hdev->id;
+
+	if (status) {
+		rsp->status = A2MP_STATUS_INVALID_CTRL_ID;
+	} else {
+		rsp->status = A2MP_STATUS_SUCCESS;
+		memcpy(rsp->amp_assoc, loc_assoc->data, loc_assoc->len);
+	}
+
+	a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, mgr->ident, len, rsp);
+	amp_mgr_put(mgr);
+	kfree(rsp);
+}
+
+void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status)
+{
+	struct amp_mgr *mgr;
+	struct amp_assoc *loc_assoc = &hdev->loc_assoc;
+	struct a2mp_physlink_req *req;
+	struct l2cap_chan *bredr_chan;
+	size_t len;
+
+	mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC_FINAL);
+	if (!mgr)
+		return;
+
+	len = sizeof(*req) + loc_assoc->len;
+
+	BT_DBG("%s mgr %p assoc_len %zu", hdev->name, mgr, len);
+
+	req = kzalloc(len, GFP_KERNEL);
+	if (!req) {
+		amp_mgr_put(mgr);
+		return;
+	}
+
+	bredr_chan = mgr->bredr_chan;
+	if (!bredr_chan)
+		goto clean;
+
+	req->local_id = hdev->id;
+	req->remote_id = bredr_chan->remote_amp_id;
+	memcpy(req->amp_assoc, loc_assoc->data, loc_assoc->len);
+
+	a2mp_send(mgr, A2MP_CREATEPHYSLINK_REQ, __next_ident(mgr), len, req);
+
+clean:
+	amp_mgr_put(mgr);
+	kfree(req);
+}
+
+void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status)
+{
+	struct amp_mgr *mgr;
+	struct a2mp_physlink_rsp rsp;
+	struct hci_conn *hs_hcon;
+
+	mgr = amp_mgr_lookup_by_state(WRITE_REMOTE_AMP_ASSOC);
+	if (!mgr)
+		return;
+
+	memset(&rsp, 0, sizeof(rsp));
+
+	hs_hcon = hci_conn_hash_lookup_state(hdev, AMP_LINK, BT_CONNECT);
+	if (!hs_hcon) {
+		rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
+	} else {
+		rsp.remote_id = hs_hcon->remote_id;
+		rsp.status = A2MP_STATUS_SUCCESS;
+	}
+
+	BT_DBG("%s mgr %p hs_hcon %p status %u", hdev->name, mgr, hs_hcon,
+	       status);
+
+	rsp.local_id = hdev->id;
+	a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, mgr->ident, sizeof(rsp), &rsp);
+	amp_mgr_put(mgr);
+}
+
+void a2mp_discover_amp(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct amp_mgr *mgr = conn->hcon->amp_mgr;
+	struct a2mp_discov_req req;
+
+	BT_DBG("chan %p conn %p mgr %p", chan, conn, mgr);
+
+	if (!mgr) {
+		mgr = amp_mgr_create(conn, true);
+		if (!mgr)
+			return;
+	}
+
+	mgr->bredr_chan = chan;
+
+	memset(&req, 0, sizeof(req));
+
+	req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU);
+	req.ext_feat = 0;
+	a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req);
+}
diff --git a/net/bluetooth/a2mp.h b/net/bluetooth/a2mp.h
new file mode 100644
index 000000000..2fd253a61
--- /dev/null
+++ b/net/bluetooth/a2mp.h
@@ -0,0 +1,154 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+   Copyright (c) 2010,2011 Code Aurora Forum.  All rights reserved.
+   Copyright (c) 2011,2012 Intel Corp.
+
+*/
+
+#ifndef __A2MP_H
+#define __A2MP_H
+
+#include <net/bluetooth/l2cap.h>
+
+enum amp_mgr_state {
+	READ_LOC_AMP_INFO,
+	READ_LOC_AMP_ASSOC,
+	READ_LOC_AMP_ASSOC_FINAL,
+	WRITE_REMOTE_AMP_ASSOC,
+};
+
+struct amp_mgr {
+	struct list_head	list;
+	struct l2cap_conn	*l2cap_conn;
+	struct l2cap_chan	*a2mp_chan;
+	struct l2cap_chan	*bredr_chan;
+	struct kref		kref;
+	__u8			ident;
+	__u8			handle;
+	unsigned long		state;
+	unsigned long		flags;
+
+	struct list_head	amp_ctrls;
+	struct mutex		amp_ctrls_lock;
+};
+
+struct a2mp_cmd {
+	__u8	code;
+	__u8	ident;
+	__le16	len;
+	__u8	data[];
+} __packed;
+
+/* A2MP command codes */
+#define A2MP_COMMAND_REJ         0x01
+struct a2mp_cmd_rej {
+	__le16	reason;
+	__u8	data[];
+} __packed;
+
+#define A2MP_DISCOVER_REQ        0x02
+struct a2mp_discov_req {
+	__le16	mtu;
+	__le16	ext_feat;
+} __packed;
+
+struct a2mp_cl {
+	__u8	id;
+	__u8	type;
+	__u8	status;
+} __packed;
+
+#define A2MP_DISCOVER_RSP        0x03
+struct a2mp_discov_rsp {
+	__le16     mtu;
+	__le16     ext_feat;
+	struct a2mp_cl cl[];
+} __packed;
+
+#define A2MP_CHANGE_NOTIFY       0x04
+#define A2MP_CHANGE_RSP          0x05
+
+#define A2MP_GETINFO_REQ         0x06
+struct a2mp_info_req {
+	__u8       id;
+} __packed;
+
+#define A2MP_GETINFO_RSP         0x07
+struct a2mp_info_rsp {
+	__u8	id;
+	__u8	status;
+	__le32	total_bw;
+	__le32	max_bw;
+	__le32	min_latency;
+	__le16	pal_cap;
+	__le16	assoc_size;
+} __packed;
+
+#define A2MP_GETAMPASSOC_REQ     0x08
+struct a2mp_amp_assoc_req {
+	__u8	id;
+} __packed;
+
+#define A2MP_GETAMPASSOC_RSP     0x09
+struct a2mp_amp_assoc_rsp {
+	__u8	id;
+	__u8	status;
+	__u8	amp_assoc[];
+} __packed;
+
+#define A2MP_CREATEPHYSLINK_REQ  0x0A
+#define A2MP_DISCONNPHYSLINK_REQ 0x0C
+struct a2mp_physlink_req {
+	__u8	local_id;
+	__u8	remote_id;
+	__u8	amp_assoc[];
+} __packed;
+
+#define A2MP_CREATEPHYSLINK_RSP  0x0B
+#define A2MP_DISCONNPHYSLINK_RSP 0x0D
+struct a2mp_physlink_rsp {
+	__u8	local_id;
+	__u8	remote_id;
+	__u8	status;
+} __packed;
+
+/* A2MP response status */
+#define A2MP_STATUS_SUCCESS			0x00
+#define A2MP_STATUS_INVALID_CTRL_ID		0x01
+#define A2MP_STATUS_UNABLE_START_LINK_CREATION	0x02
+#define A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS	0x02
+#define A2MP_STATUS_COLLISION_OCCURED		0x03
+#define A2MP_STATUS_DISCONN_REQ_RECVD		0x04
+#define A2MP_STATUS_PHYS_LINK_EXISTS		0x05
+#define A2MP_STATUS_SECURITY_VIOLATION		0x06
+
+struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr);
+
+#if IS_ENABLED(CONFIG_BT_HS)
+int amp_mgr_put(struct amp_mgr *mgr);
+struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
+				       struct sk_buff *skb);
+void a2mp_discover_amp(struct l2cap_chan *chan);
+#else
+static inline int amp_mgr_put(struct amp_mgr *mgr)
+{
+	return 0;
+}
+
+static inline struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
+						     struct sk_buff *skb)
+{
+	return NULL;
+}
+
+static inline void a2mp_discover_amp(struct l2cap_chan *chan)
+{
+}
+#endif
+
+void a2mp_send_getinfo_rsp(struct hci_dev *hdev);
+void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status);
+void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status);
+void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status);
+
+#endif /* __A2MP_H */
diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c
new file mode 100644
index 000000000..14a917e70
--- /dev/null
+++ b/net/bluetooth/af_bluetooth.c
@@ -0,0 +1,811 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2000-2001 Qualcomm Incorporated
+
+   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth address family and sockets. */
+
+#include <linux/module.h>
+#include <linux/debugfs.h>
+#include <linux/stringify.h>
+#include <linux/sched/signal.h>
+
+#include <asm/ioctls.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <linux/proc_fs.h>
+
+#include "leds.h"
+#include "selftest.h"
+
+/* Bluetooth sockets */
+#define BT_MAX_PROTO	8
+static const struct net_proto_family *bt_proto[BT_MAX_PROTO];
+static DEFINE_RWLOCK(bt_proto_lock);
+
+static struct lock_class_key bt_lock_key[BT_MAX_PROTO];
+static const char *const bt_key_strings[BT_MAX_PROTO] = {
+	"sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP",
+	"sk_lock-AF_BLUETOOTH-BTPROTO_HCI",
+	"sk_lock-AF_BLUETOOTH-BTPROTO_SCO",
+	"sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM",
+	"sk_lock-AF_BLUETOOTH-BTPROTO_BNEP",
+	"sk_lock-AF_BLUETOOTH-BTPROTO_CMTP",
+	"sk_lock-AF_BLUETOOTH-BTPROTO_HIDP",
+	"sk_lock-AF_BLUETOOTH-BTPROTO_AVDTP",
+};
+
+static struct lock_class_key bt_slock_key[BT_MAX_PROTO];
+static const char *const bt_slock_key_strings[BT_MAX_PROTO] = {
+	"slock-AF_BLUETOOTH-BTPROTO_L2CAP",
+	"slock-AF_BLUETOOTH-BTPROTO_HCI",
+	"slock-AF_BLUETOOTH-BTPROTO_SCO",
+	"slock-AF_BLUETOOTH-BTPROTO_RFCOMM",
+	"slock-AF_BLUETOOTH-BTPROTO_BNEP",
+	"slock-AF_BLUETOOTH-BTPROTO_CMTP",
+	"slock-AF_BLUETOOTH-BTPROTO_HIDP",
+	"slock-AF_BLUETOOTH-BTPROTO_AVDTP",
+};
+
+void bt_sock_reclassify_lock(struct sock *sk, int proto)
+{
+	BUG_ON(!sk);
+	BUG_ON(!sock_allow_reclassification(sk));
+
+	sock_lock_init_class_and_name(sk,
+			bt_slock_key_strings[proto], &bt_slock_key[proto],
+				bt_key_strings[proto], &bt_lock_key[proto]);
+}
+EXPORT_SYMBOL(bt_sock_reclassify_lock);
+
+int bt_sock_register(int proto, const struct net_proto_family *ops)
+{
+	int err = 0;
+
+	if (proto < 0 || proto >= BT_MAX_PROTO)
+		return -EINVAL;
+
+	write_lock(&bt_proto_lock);
+
+	if (bt_proto[proto])
+		err = -EEXIST;
+	else
+		bt_proto[proto] = ops;
+
+	write_unlock(&bt_proto_lock);
+
+	return err;
+}
+EXPORT_SYMBOL(bt_sock_register);
+
+void bt_sock_unregister(int proto)
+{
+	if (proto < 0 || proto >= BT_MAX_PROTO)
+		return;
+
+	write_lock(&bt_proto_lock);
+	bt_proto[proto] = NULL;
+	write_unlock(&bt_proto_lock);
+}
+EXPORT_SYMBOL(bt_sock_unregister);
+
+static int bt_sock_create(struct net *net, struct socket *sock, int proto,
+			  int kern)
+{
+	int err;
+
+	if (net != &init_net)
+		return -EAFNOSUPPORT;
+
+	if (proto < 0 || proto >= BT_MAX_PROTO)
+		return -EINVAL;
+
+	if (!bt_proto[proto])
+		request_module("bt-proto-%d", proto);
+
+	err = -EPROTONOSUPPORT;
+
+	read_lock(&bt_proto_lock);
+
+	if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) {
+		err = bt_proto[proto]->create(net, sock, proto, kern);
+		if (!err)
+			bt_sock_reclassify_lock(sock->sk, proto);
+		module_put(bt_proto[proto]->owner);
+	}
+
+	read_unlock(&bt_proto_lock);
+
+	return err;
+}
+
+void bt_sock_link(struct bt_sock_list *l, struct sock *sk)
+{
+	write_lock(&l->lock);
+	sk_add_node(sk, &l->head);
+	write_unlock(&l->lock);
+}
+EXPORT_SYMBOL(bt_sock_link);
+
+void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk)
+{
+	write_lock(&l->lock);
+	sk_del_node_init(sk);
+	write_unlock(&l->lock);
+}
+EXPORT_SYMBOL(bt_sock_unlink);
+
+void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh)
+{
+	BT_DBG("parent %p, sk %p", parent, sk);
+
+	sock_hold(sk);
+
+	if (bh)
+		bh_lock_sock_nested(sk);
+	else
+		lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
+
+	list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q);
+	bt_sk(sk)->parent = parent;
+
+	if (bh)
+		bh_unlock_sock(sk);
+	else
+		release_sock(sk);
+
+	sk_acceptq_added(parent);
+}
+EXPORT_SYMBOL(bt_accept_enqueue);
+
+/* Calling function must hold the sk lock.
+ * bt_sk(sk)->parent must be non-NULL meaning sk is in the parent list.
+ */
+void bt_accept_unlink(struct sock *sk)
+{
+	BT_DBG("sk %p state %d", sk, sk->sk_state);
+
+	list_del_init(&bt_sk(sk)->accept_q);
+	sk_acceptq_removed(bt_sk(sk)->parent);
+	bt_sk(sk)->parent = NULL;
+	sock_put(sk);
+}
+EXPORT_SYMBOL(bt_accept_unlink);
+
+struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock)
+{
+	struct bt_sock *s, *n;
+	struct sock *sk;
+
+	BT_DBG("parent %p", parent);
+
+restart:
+	list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) {
+		sk = (struct sock *)s;
+
+		/* Prevent early freeing of sk due to unlink and sock_kill */
+		sock_hold(sk);
+		lock_sock(sk);
+
+		/* Check sk has not already been unlinked via
+		 * bt_accept_unlink() due to serialisation caused by sk locking
+		 */
+		if (!bt_sk(sk)->parent) {
+			BT_DBG("sk %p, already unlinked", sk);
+			release_sock(sk);
+			sock_put(sk);
+
+			/* Restart the loop as sk is no longer in the list
+			 * and also avoid a potential infinite loop because
+			 * list_for_each_entry_safe() is not thread safe.
+			 */
+			goto restart;
+		}
+
+		/* sk is safely in the parent list so reduce reference count */
+		sock_put(sk);
+
+		/* FIXME: Is this check still needed */
+		if (sk->sk_state == BT_CLOSED) {
+			bt_accept_unlink(sk);
+			release_sock(sk);
+			continue;
+		}
+
+		if (sk->sk_state == BT_CONNECTED || !newsock ||
+		    test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) {
+			bt_accept_unlink(sk);
+			if (newsock)
+				sock_graft(sk, newsock);
+
+			release_sock(sk);
+			return sk;
+		}
+
+		release_sock(sk);
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL(bt_accept_dequeue);
+
+int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
+		    int flags)
+{
+	int noblock = flags & MSG_DONTWAIT;
+	struct sock *sk = sock->sk;
+	struct sk_buff *skb;
+	size_t copied;
+	size_t skblen;
+	int err;
+
+	BT_DBG("sock %p sk %p len %zu", sock, sk, len);
+
+	if (flags & MSG_OOB)
+		return -EOPNOTSUPP;
+
+	lock_sock(sk);
+
+	skb = skb_recv_datagram(sk, flags, noblock, &err);
+	if (!skb) {
+		if (sk->sk_shutdown & RCV_SHUTDOWN)
+			err = 0;
+
+		release_sock(sk);
+		return err;
+	}
+
+	skblen = skb->len;
+	copied = skb->len;
+	if (len < copied) {
+		msg->msg_flags |= MSG_TRUNC;
+		copied = len;
+	}
+
+	skb_reset_transport_header(skb);
+	err = skb_copy_datagram_msg(skb, 0, msg, copied);
+	if (err == 0) {
+		sock_recv_ts_and_drops(msg, sk, skb);
+
+		if (msg->msg_name && bt_sk(sk)->skb_msg_name)
+			bt_sk(sk)->skb_msg_name(skb, msg->msg_name,
+						&msg->msg_namelen);
+
+		if (bt_sk(sk)->skb_put_cmsg)
+			bt_sk(sk)->skb_put_cmsg(skb, msg, sk);
+	}
+
+	skb_free_datagram(sk, skb);
+
+	release_sock(sk);
+
+	if (flags & MSG_TRUNC)
+		copied = skblen;
+
+	return err ? : copied;
+}
+EXPORT_SYMBOL(bt_sock_recvmsg);
+
+static long bt_sock_data_wait(struct sock *sk, long timeo)
+{
+	DECLARE_WAITQUEUE(wait, current);
+
+	add_wait_queue(sk_sleep(sk), &wait);
+	for (;;) {
+		set_current_state(TASK_INTERRUPTIBLE);
+
+		if (!skb_queue_empty(&sk->sk_receive_queue))
+			break;
+
+		if (sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN))
+			break;
+
+		if (signal_pending(current) || !timeo)
+			break;
+
+		sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
+		release_sock(sk);
+		timeo = schedule_timeout(timeo);
+		lock_sock(sk);
+		sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
+	}
+
+	__set_current_state(TASK_RUNNING);
+	remove_wait_queue(sk_sleep(sk), &wait);
+	return timeo;
+}
+
+int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
+			   size_t size, int flags)
+{
+	struct sock *sk = sock->sk;
+	int err = 0;
+	size_t target, copied = 0;
+	long timeo;
+
+	if (flags & MSG_OOB)
+		return -EOPNOTSUPP;
+
+	BT_DBG("sk %p size %zu", sk, size);
+
+	lock_sock(sk);
+
+	target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
+	timeo  = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
+
+	do {
+		struct sk_buff *skb;
+		int chunk;
+
+		skb = skb_dequeue(&sk->sk_receive_queue);
+		if (!skb) {
+			if (copied >= target)
+				break;
+
+			err = sock_error(sk);
+			if (err)
+				break;
+			if (sk->sk_shutdown & RCV_SHUTDOWN)
+				break;
+
+			err = -EAGAIN;
+			if (!timeo)
+				break;
+
+			timeo = bt_sock_data_wait(sk, timeo);
+
+			if (signal_pending(current)) {
+				err = sock_intr_errno(timeo);
+				goto out;
+			}
+			continue;
+		}
+
+		chunk = min_t(unsigned int, skb->len, size);
+		if (skb_copy_datagram_msg(skb, 0, msg, chunk)) {
+			skb_queue_head(&sk->sk_receive_queue, skb);
+			if (!copied)
+				copied = -EFAULT;
+			break;
+		}
+		copied += chunk;
+		size   -= chunk;
+
+		sock_recv_ts_and_drops(msg, sk, skb);
+
+		if (!(flags & MSG_PEEK)) {
+			int skb_len = skb_headlen(skb);
+
+			if (chunk <= skb_len) {
+				__skb_pull(skb, chunk);
+			} else {
+				struct sk_buff *frag;
+
+				__skb_pull(skb, skb_len);
+				chunk -= skb_len;
+
+				skb_walk_frags(skb, frag) {
+					if (chunk <= frag->len) {
+						/* Pulling partial data */
+						skb->len -= chunk;
+						skb->data_len -= chunk;
+						__skb_pull(frag, chunk);
+						break;
+					} else if (frag->len) {
+						/* Pulling all frag data */
+						chunk -= frag->len;
+						skb->len -= frag->len;
+						skb->data_len -= frag->len;
+						__skb_pull(frag, frag->len);
+					}
+				}
+			}
+
+			if (skb->len) {
+				skb_queue_head(&sk->sk_receive_queue, skb);
+				break;
+			}
+			kfree_skb(skb);
+
+		} else {
+			/* put message back and return */
+			skb_queue_head(&sk->sk_receive_queue, skb);
+			break;
+		}
+	} while (size);
+
+out:
+	release_sock(sk);
+	return copied ? : err;
+}
+EXPORT_SYMBOL(bt_sock_stream_recvmsg);
+
+static inline __poll_t bt_accept_poll(struct sock *parent)
+{
+	struct bt_sock *s, *n;
+	struct sock *sk;
+
+	list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) {
+		sk = (struct sock *)s;
+		if (sk->sk_state == BT_CONNECTED ||
+		    (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) &&
+		     sk->sk_state == BT_CONNECT2))
+			return EPOLLIN | EPOLLRDNORM;
+	}
+
+	return 0;
+}
+
+__poll_t bt_sock_poll(struct file *file, struct socket *sock,
+			  poll_table *wait)
+{
+	struct sock *sk = sock->sk;
+	__poll_t mask = 0;
+
+	poll_wait(file, sk_sleep(sk), wait);
+
+	if (sk->sk_state == BT_LISTEN)
+		return bt_accept_poll(sk);
+
+	if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
+		mask |= EPOLLERR |
+			(sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);
+
+	if (sk->sk_shutdown & RCV_SHUTDOWN)
+		mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
+
+	if (sk->sk_shutdown == SHUTDOWN_MASK)
+		mask |= EPOLLHUP;
+
+	if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
+		mask |= EPOLLIN | EPOLLRDNORM;
+
+	if (sk->sk_state == BT_CLOSED)
+		mask |= EPOLLHUP;
+
+	if (sk->sk_state == BT_CONNECT ||
+			sk->sk_state == BT_CONNECT2 ||
+			sk->sk_state == BT_CONFIG)
+		return mask;
+
+	if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk))
+		mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND;
+	else
+		sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
+
+	return mask;
+}
+EXPORT_SYMBOL(bt_sock_poll);
+
+int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+	struct sock *sk = sock->sk;
+	struct sk_buff *skb;
+	long amount;
+	int err;
+
+	BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);
+
+	switch (cmd) {
+	case TIOCOUTQ:
+		if (sk->sk_state == BT_LISTEN)
+			return -EINVAL;
+
+		amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
+		if (amount < 0)
+			amount = 0;
+		err = put_user(amount, (int __user *) arg);
+		break;
+
+	case TIOCINQ:
+		if (sk->sk_state == BT_LISTEN)
+			return -EINVAL;
+
+		lock_sock(sk);
+		skb = skb_peek(&sk->sk_receive_queue);
+		amount = skb ? skb->len : 0;
+		release_sock(sk);
+		err = put_user(amount, (int __user *) arg);
+		break;
+
+	default:
+		err = -ENOIOCTLCMD;
+		break;
+	}
+
+	return err;
+}
+EXPORT_SYMBOL(bt_sock_ioctl);
+
+/* This function expects the sk lock to be held when called */
+int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	int err = 0;
+
+	BT_DBG("sk %p", sk);
+
+	add_wait_queue(sk_sleep(sk), &wait);
+	set_current_state(TASK_INTERRUPTIBLE);
+	while (sk->sk_state != state) {
+		if (!timeo) {
+			err = -EINPROGRESS;
+			break;
+		}
+
+		if (signal_pending(current)) {
+			err = sock_intr_errno(timeo);
+			break;
+		}
+
+		release_sock(sk);
+		timeo = schedule_timeout(timeo);
+		lock_sock(sk);
+		set_current_state(TASK_INTERRUPTIBLE);
+
+		err = sock_error(sk);
+		if (err)
+			break;
+	}
+	__set_current_state(TASK_RUNNING);
+	remove_wait_queue(sk_sleep(sk), &wait);
+	return err;
+}
+EXPORT_SYMBOL(bt_sock_wait_state);
+
+/* This function expects the sk lock to be held when called */
+int bt_sock_wait_ready(struct sock *sk, unsigned long flags)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	unsigned long timeo;
+	int err = 0;
+
+	BT_DBG("sk %p", sk);
+
+	timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
+
+	add_wait_queue(sk_sleep(sk), &wait);
+	set_current_state(TASK_INTERRUPTIBLE);
+	while (test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags)) {
+		if (!timeo) {
+			err = -EAGAIN;
+			break;
+		}
+
+		if (signal_pending(current)) {
+			err = sock_intr_errno(timeo);
+			break;
+		}
+
+		release_sock(sk);
+		timeo = schedule_timeout(timeo);
+		lock_sock(sk);
+		set_current_state(TASK_INTERRUPTIBLE);
+
+		err = sock_error(sk);
+		if (err)
+			break;
+	}
+	__set_current_state(TASK_RUNNING);
+	remove_wait_queue(sk_sleep(sk), &wait);
+
+	return err;
+}
+EXPORT_SYMBOL(bt_sock_wait_ready);
+
+#ifdef CONFIG_PROC_FS
+static void *bt_seq_start(struct seq_file *seq, loff_t *pos)
+	__acquires(seq->private->l->lock)
+{
+	struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));
+
+	read_lock(&l->lock);
+	return seq_hlist_start_head(&l->head, *pos);
+}
+
+static void *bt_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));
+
+	return seq_hlist_next(v, &l->head, pos);
+}
+
+static void bt_seq_stop(struct seq_file *seq, void *v)
+	__releases(seq->private->l->lock)
+{
+	struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));
+
+	read_unlock(&l->lock);
+}
+
+static int bt_seq_show(struct seq_file *seq, void *v)
+{
+	struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));
+
+	if (v == SEQ_START_TOKEN) {
+		seq_puts(seq ,"sk               RefCnt Rmem   Wmem   User   Inode  Parent");
+
+		if (l->custom_seq_show) {
+			seq_putc(seq, ' ');
+			l->custom_seq_show(seq, v);
+		}
+
+		seq_putc(seq, '\n');
+	} else {
+		struct sock *sk = sk_entry(v);
+		struct bt_sock *bt = bt_sk(sk);
+
+		seq_printf(seq,
+			   "%pK %-6d %-6u %-6u %-6u %-6lu %-6lu",
+			   sk,
+			   refcount_read(&sk->sk_refcnt),
+			   sk_rmem_alloc_get(sk),
+			   sk_wmem_alloc_get(sk),
+			   from_kuid(seq_user_ns(seq), sock_i_uid(sk)),
+			   sock_i_ino(sk),
+			   bt->parent? sock_i_ino(bt->parent): 0LU);
+
+		if (l->custom_seq_show) {
+			seq_putc(seq, ' ');
+			l->custom_seq_show(seq, v);
+		}
+
+		seq_putc(seq, '\n');
+	}
+	return 0;
+}
+
+static const struct seq_operations bt_seq_ops = {
+	.start = bt_seq_start,
+	.next  = bt_seq_next,
+	.stop  = bt_seq_stop,
+	.show  = bt_seq_show,
+};
+
+int bt_procfs_init(struct net *net, const char *name,
+		   struct bt_sock_list *sk_list,
+		   int (* seq_show)(struct seq_file *, void *))
+{
+	sk_list->custom_seq_show = seq_show;
+
+	if (!proc_create_seq_data(name, 0, net->proc_net, &bt_seq_ops, sk_list))
+		return -ENOMEM;
+	return 0;
+}
+
+void bt_procfs_cleanup(struct net *net, const char *name)
+{
+	remove_proc_entry(name, net->proc_net);
+}
+#else
+int bt_procfs_init(struct net *net, const char *name,
+		   struct bt_sock_list *sk_list,
+		   int (* seq_show)(struct seq_file *, void *))
+{
+	return 0;
+}
+
+void bt_procfs_cleanup(struct net *net, const char *name)
+{
+}
+#endif
+EXPORT_SYMBOL(bt_procfs_init);
+EXPORT_SYMBOL(bt_procfs_cleanup);
+
+static const struct net_proto_family bt_sock_family_ops = {
+	.owner	= THIS_MODULE,
+	.family	= PF_BLUETOOTH,
+	.create	= bt_sock_create,
+};
+
+struct dentry *bt_debugfs;
+EXPORT_SYMBOL_GPL(bt_debugfs);
+
+#define VERSION __stringify(BT_SUBSYS_VERSION) "." \
+		__stringify(BT_SUBSYS_REVISION)
+
+static int __init bt_init(void)
+{
+	int err;
+
+	sock_skb_cb_check_size(sizeof(struct bt_skb_cb));
+
+	BT_INFO("Core ver %s", VERSION);
+
+	err = bt_selftest();
+	if (err < 0)
+		return err;
+
+	bt_debugfs = debugfs_create_dir("bluetooth", NULL);
+
+	bt_leds_init();
+
+	err = bt_sysfs_init();
+	if (err < 0)
+		goto cleanup_led;
+
+	err = sock_register(&bt_sock_family_ops);
+	if (err)
+		goto cleanup_sysfs;
+
+	BT_INFO("HCI device and connection manager initialized");
+
+	err = hci_sock_init();
+	if (err)
+		goto unregister_socket;
+
+	err = l2cap_init();
+	if (err)
+		goto cleanup_socket;
+
+	err = sco_init();
+	if (err)
+		goto cleanup_cap;
+
+	err = mgmt_init();
+	if (err)
+		goto cleanup_sco;
+
+	return 0;
+
+cleanup_sco:
+	sco_exit();
+cleanup_cap:
+	l2cap_exit();
+cleanup_socket:
+	hci_sock_cleanup();
+unregister_socket:
+	sock_unregister(PF_BLUETOOTH);
+cleanup_sysfs:
+	bt_sysfs_cleanup();
+cleanup_led:
+	bt_leds_cleanup();
+	return err;
+}
+
+static void __exit bt_exit(void)
+{
+	mgmt_exit();
+
+	sco_exit();
+
+	l2cap_exit();
+
+	hci_sock_cleanup();
+
+	sock_unregister(PF_BLUETOOTH);
+
+	bt_sysfs_cleanup();
+
+	bt_leds_cleanup();
+
+	debugfs_remove_recursive(bt_debugfs);
+}
+
+subsys_initcall(bt_init);
+module_exit(bt_exit);
+
+MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
+MODULE_DESCRIPTION("Bluetooth Core ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NETPROTO(PF_BLUETOOTH);
diff --git a/net/bluetooth/amp.c b/net/bluetooth/amp.c
new file mode 100644
index 000000000..be2d469d6
--- /dev/null
+++ b/net/bluetooth/amp.c
@@ -0,0 +1,591 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+   Copyright (c) 2011,2012 Intel Corp.
+
+*/
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci.h>
+#include <net/bluetooth/hci_core.h>
+#include <crypto/hash.h>
+
+#include "hci_request.h"
+#include "a2mp.h"
+#include "amp.h"
+
+/* Remote AMP Controllers interface */
+void amp_ctrl_get(struct amp_ctrl *ctrl)
+{
+	BT_DBG("ctrl %p orig refcnt %d", ctrl,
+	       kref_read(&ctrl->kref));
+
+	kref_get(&ctrl->kref);
+}
+
+static void amp_ctrl_destroy(struct kref *kref)
+{
+	struct amp_ctrl *ctrl = container_of(kref, struct amp_ctrl, kref);
+
+	BT_DBG("ctrl %p", ctrl);
+
+	kfree(ctrl->assoc);
+	kfree(ctrl);
+}
+
+int amp_ctrl_put(struct amp_ctrl *ctrl)
+{
+	BT_DBG("ctrl %p orig refcnt %d", ctrl,
+	       kref_read(&ctrl->kref));
+
+	return kref_put(&ctrl->kref, &amp_ctrl_destroy);
+}
+
+struct amp_ctrl *amp_ctrl_add(struct amp_mgr *mgr, u8 id)
+{
+	struct amp_ctrl *ctrl;
+
+	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
+	if (!ctrl)
+		return NULL;
+
+	kref_init(&ctrl->kref);
+	ctrl->id = id;
+
+	mutex_lock(&mgr->amp_ctrls_lock);
+	list_add(&ctrl->list, &mgr->amp_ctrls);
+	mutex_unlock(&mgr->amp_ctrls_lock);
+
+	BT_DBG("mgr %p ctrl %p", mgr, ctrl);
+
+	return ctrl;
+}
+
+void amp_ctrl_list_flush(struct amp_mgr *mgr)
+{
+	struct amp_ctrl *ctrl, *n;
+
+	BT_DBG("mgr %p", mgr);
+
+	mutex_lock(&mgr->amp_ctrls_lock);
+	list_for_each_entry_safe(ctrl, n, &mgr->amp_ctrls, list) {
+		list_del(&ctrl->list);
+		amp_ctrl_put(ctrl);
+	}
+	mutex_unlock(&mgr->amp_ctrls_lock);
+}
+
+struct amp_ctrl *amp_ctrl_lookup(struct amp_mgr *mgr, u8 id)
+{
+	struct amp_ctrl *ctrl;
+
+	BT_DBG("mgr %p id %d", mgr, id);
+
+	mutex_lock(&mgr->amp_ctrls_lock);
+	list_for_each_entry(ctrl, &mgr->amp_ctrls, list) {
+		if (ctrl->id == id) {
+			amp_ctrl_get(ctrl);
+			mutex_unlock(&mgr->amp_ctrls_lock);
+			return ctrl;
+		}
+	}
+	mutex_unlock(&mgr->amp_ctrls_lock);
+
+	return NULL;
+}
+
+/* Physical Link interface */
+static u8 __next_handle(struct amp_mgr *mgr)
+{
+	if (++mgr->handle == 0)
+		mgr->handle = 1;
+
+	return mgr->handle;
+}
+
+struct hci_conn *phylink_add(struct hci_dev *hdev, struct amp_mgr *mgr,
+			     u8 remote_id, bool out)
+{
+	bdaddr_t *dst = &mgr->l2cap_conn->hcon->dst;
+	struct hci_conn *hcon;
+	u8 role = out ? HCI_ROLE_MASTER : HCI_ROLE_SLAVE;
+
+	hcon = hci_conn_add(hdev, AMP_LINK, dst, role);
+	if (!hcon)
+		return NULL;
+
+	BT_DBG("hcon %p dst %pMR", hcon, dst);
+
+	hcon->state = BT_CONNECT;
+	hcon->attempt++;
+	hcon->handle = __next_handle(mgr);
+	hcon->remote_id = remote_id;
+	hcon->amp_mgr = amp_mgr_get(mgr);
+
+	return hcon;
+}
+
+/* AMP crypto key generation interface */
+static int hmac_sha256(u8 *key, u8 ksize, char *plaintext, u8 psize, u8 *output)
+{
+	struct crypto_shash *tfm;
+	struct shash_desc *shash;
+	int ret;
+
+	if (!ksize)
+		return -EINVAL;
+
+	tfm = crypto_alloc_shash("hmac(sha256)", 0, 0);
+	if (IS_ERR(tfm)) {
+		BT_DBG("crypto_alloc_ahash failed: err %ld", PTR_ERR(tfm));
+		return PTR_ERR(tfm);
+	}
+
+	ret = crypto_shash_setkey(tfm, key, ksize);
+	if (ret) {
+		BT_DBG("crypto_ahash_setkey failed: err %d", ret);
+		goto failed;
+	}
+
+	shash = kzalloc(sizeof(*shash) + crypto_shash_descsize(tfm),
+			GFP_KERNEL);
+	if (!shash) {
+		ret = -ENOMEM;
+		goto failed;
+	}
+
+	shash->tfm = tfm;
+
+	ret = crypto_shash_digest(shash, plaintext, psize, output);
+
+	kfree(shash);
+
+failed:
+	crypto_free_shash(tfm);
+	return ret;
+}
+
+int phylink_gen_key(struct hci_conn *conn, u8 *data, u8 *len, u8 *type)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct link_key *key;
+	u8 keybuf[HCI_AMP_LINK_KEY_SIZE];
+	u8 gamp_key[HCI_AMP_LINK_KEY_SIZE];
+	int err;
+
+	if (!hci_conn_check_link_mode(conn))
+		return -EACCES;
+
+	BT_DBG("conn %p key_type %d", conn, conn->key_type);
+
+	/* Legacy key */
+	if (conn->key_type < 3) {
+		bt_dev_err(hdev, "legacy key type %d", conn->key_type);
+		return -EACCES;
+	}
+
+	*type = conn->key_type;
+	*len = HCI_AMP_LINK_KEY_SIZE;
+
+	key = hci_find_link_key(hdev, &conn->dst);
+	if (!key) {
+		BT_DBG("No Link key for conn %p dst %pMR", conn, &conn->dst);
+		return -EACCES;
+	}
+
+	/* BR/EDR Link Key concatenated together with itself */
+	memcpy(&keybuf[0], key->val, HCI_LINK_KEY_SIZE);
+	memcpy(&keybuf[HCI_LINK_KEY_SIZE], key->val, HCI_LINK_KEY_SIZE);
+
+	/* Derive Generic AMP Link Key (gamp) */
+	err = hmac_sha256(keybuf, HCI_AMP_LINK_KEY_SIZE, "gamp", 4, gamp_key);
+	if (err) {
+		bt_dev_err(hdev, "could not derive Generic AMP Key: err %d", err);
+		return err;
+	}
+
+	if (conn->key_type == HCI_LK_DEBUG_COMBINATION) {
+		BT_DBG("Use Generic AMP Key (gamp)");
+		memcpy(data, gamp_key, HCI_AMP_LINK_KEY_SIZE);
+		return err;
+	}
+
+	/* Derive Dedicated AMP Link Key: "802b" is 802.11 PAL keyID */
+	return hmac_sha256(gamp_key, HCI_AMP_LINK_KEY_SIZE, "802b", 4, data);
+}
+
+static void read_local_amp_assoc_complete(struct hci_dev *hdev, u8 status,
+					  u16 opcode, struct sk_buff *skb)
+{
+	struct hci_rp_read_local_amp_assoc *rp = (void *)skb->data;
+	struct amp_assoc *assoc = &hdev->loc_assoc;
+	size_t rem_len, frag_len;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		goto send_rsp;
+
+	frag_len = skb->len - sizeof(*rp);
+	rem_len = __le16_to_cpu(rp->rem_len);
+
+	if (rem_len > frag_len) {
+		BT_DBG("frag_len %zu rem_len %zu", frag_len, rem_len);
+
+		memcpy(assoc->data + assoc->offset, rp->frag, frag_len);
+		assoc->offset += frag_len;
+
+		/* Read other fragments */
+		amp_read_loc_assoc_frag(hdev, rp->phy_handle);
+
+		return;
+	}
+
+	memcpy(assoc->data + assoc->offset, rp->frag, rem_len);
+	assoc->len = assoc->offset + rem_len;
+	assoc->offset = 0;
+
+send_rsp:
+	/* Send A2MP Rsp when all fragments are received */
+	a2mp_send_getampassoc_rsp(hdev, rp->status);
+	a2mp_send_create_phy_link_req(hdev, rp->status);
+}
+
+void amp_read_loc_assoc_frag(struct hci_dev *hdev, u8 phy_handle)
+{
+	struct hci_cp_read_local_amp_assoc cp;
+	struct amp_assoc *loc_assoc = &hdev->loc_assoc;
+	struct hci_request req;
+	int err;
+
+	BT_DBG("%s handle %d", hdev->name, phy_handle);
+
+	cp.phy_handle = phy_handle;
+	cp.max_len = cpu_to_le16(hdev->amp_assoc_size);
+	cp.len_so_far = cpu_to_le16(loc_assoc->offset);
+
+	hci_req_init(&req, hdev);
+	hci_req_add(&req, HCI_OP_READ_LOCAL_AMP_ASSOC, sizeof(cp), &cp);
+	err = hci_req_run_skb(&req, read_local_amp_assoc_complete);
+	if (err < 0)
+		a2mp_send_getampassoc_rsp(hdev, A2MP_STATUS_INVALID_CTRL_ID);
+}
+
+void amp_read_loc_assoc(struct hci_dev *hdev, struct amp_mgr *mgr)
+{
+	struct hci_cp_read_local_amp_assoc cp;
+	struct hci_request req;
+	int err;
+
+	memset(&hdev->loc_assoc, 0, sizeof(struct amp_assoc));
+	memset(&cp, 0, sizeof(cp));
+
+	cp.max_len = cpu_to_le16(hdev->amp_assoc_size);
+
+	set_bit(READ_LOC_AMP_ASSOC, &mgr->state);
+	hci_req_init(&req, hdev);
+	hci_req_add(&req, HCI_OP_READ_LOCAL_AMP_ASSOC, sizeof(cp), &cp);
+	err = hci_req_run_skb(&req, read_local_amp_assoc_complete);
+	if (err < 0)
+		a2mp_send_getampassoc_rsp(hdev, A2MP_STATUS_INVALID_CTRL_ID);
+}
+
+void amp_read_loc_assoc_final_data(struct hci_dev *hdev,
+				   struct hci_conn *hcon)
+{
+	struct hci_cp_read_local_amp_assoc cp;
+	struct amp_mgr *mgr = hcon->amp_mgr;
+	struct hci_request req;
+	int err;
+
+	if (!mgr)
+		return;
+
+	cp.phy_handle = hcon->handle;
+	cp.len_so_far = cpu_to_le16(0);
+	cp.max_len = cpu_to_le16(hdev->amp_assoc_size);
+
+	set_bit(READ_LOC_AMP_ASSOC_FINAL, &mgr->state);
+
+	/* Read Local AMP Assoc final link information data */
+	hci_req_init(&req, hdev);
+	hci_req_add(&req, HCI_OP_READ_LOCAL_AMP_ASSOC, sizeof(cp), &cp);
+	err = hci_req_run_skb(&req, read_local_amp_assoc_complete);
+	if (err < 0)
+		a2mp_send_getampassoc_rsp(hdev, A2MP_STATUS_INVALID_CTRL_ID);
+}
+
+static void write_remote_amp_assoc_complete(struct hci_dev *hdev, u8 status,
+					    u16 opcode, struct sk_buff *skb)
+{
+	struct hci_rp_write_remote_amp_assoc *rp = (void *)skb->data;
+
+	BT_DBG("%s status 0x%2.2x phy_handle 0x%2.2x",
+	       hdev->name, rp->status, rp->phy_handle);
+
+	if (rp->status)
+		return;
+
+	amp_write_rem_assoc_continue(hdev, rp->phy_handle);
+}
+
+/* Write AMP Assoc data fragments, returns true with last fragment written*/
+static bool amp_write_rem_assoc_frag(struct hci_dev *hdev,
+				     struct hci_conn *hcon)
+{
+	struct hci_cp_write_remote_amp_assoc *cp;
+	struct amp_mgr *mgr = hcon->amp_mgr;
+	struct amp_ctrl *ctrl;
+	struct hci_request req;
+	u16 frag_len, len;
+
+	ctrl = amp_ctrl_lookup(mgr, hcon->remote_id);
+	if (!ctrl)
+		return false;
+
+	if (!ctrl->assoc_rem_len) {
+		BT_DBG("all fragments are written");
+		ctrl->assoc_rem_len = ctrl->assoc_len;
+		ctrl->assoc_len_so_far = 0;
+
+		amp_ctrl_put(ctrl);
+		return true;
+	}
+
+	frag_len = min_t(u16, 248, ctrl->assoc_rem_len);
+	len = frag_len + sizeof(*cp);
+
+	cp = kzalloc(len, GFP_KERNEL);
+	if (!cp) {
+		amp_ctrl_put(ctrl);
+		return false;
+	}
+
+	BT_DBG("hcon %p ctrl %p frag_len %u assoc_len %u rem_len %u",
+	       hcon, ctrl, frag_len, ctrl->assoc_len, ctrl->assoc_rem_len);
+
+	cp->phy_handle = hcon->handle;
+	cp->len_so_far = cpu_to_le16(ctrl->assoc_len_so_far);
+	cp->rem_len = cpu_to_le16(ctrl->assoc_rem_len);
+	memcpy(cp->frag, ctrl->assoc, frag_len);
+
+	ctrl->assoc_len_so_far += frag_len;
+	ctrl->assoc_rem_len -= frag_len;
+
+	amp_ctrl_put(ctrl);
+
+	hci_req_init(&req, hdev);
+	hci_req_add(&req, HCI_OP_WRITE_REMOTE_AMP_ASSOC, len, cp);
+	hci_req_run_skb(&req, write_remote_amp_assoc_complete);
+
+	kfree(cp);
+
+	return false;
+}
+
+void amp_write_rem_assoc_continue(struct hci_dev *hdev, u8 handle)
+{
+	struct hci_conn *hcon;
+
+	BT_DBG("%s phy handle 0x%2.2x", hdev->name, handle);
+
+	hcon = hci_conn_hash_lookup_handle(hdev, handle);
+	if (!hcon)
+		return;
+
+	/* Send A2MP create phylink rsp when all fragments are written */
+	if (amp_write_rem_assoc_frag(hdev, hcon))
+		a2mp_send_create_phy_link_rsp(hdev, 0);
+}
+
+void amp_write_remote_assoc(struct hci_dev *hdev, u8 handle)
+{
+	struct hci_conn *hcon;
+
+	BT_DBG("%s phy handle 0x%2.2x", hdev->name, handle);
+
+	hcon = hci_conn_hash_lookup_handle(hdev, handle);
+	if (!hcon)
+		return;
+
+	BT_DBG("%s phy handle 0x%2.2x hcon %p", hdev->name, handle, hcon);
+
+	amp_write_rem_assoc_frag(hdev, hcon);
+}
+
+static void create_phylink_complete(struct hci_dev *hdev, u8 status,
+				    u16 opcode)
+{
+	struct hci_cp_create_phy_link *cp;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_PHY_LINK);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	if (status) {
+		struct hci_conn *hcon;
+
+		hcon = hci_conn_hash_lookup_handle(hdev, cp->phy_handle);
+		if (hcon)
+			hci_conn_del(hcon);
+	} else {
+		amp_write_remote_assoc(hdev, cp->phy_handle);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+void amp_create_phylink(struct hci_dev *hdev, struct amp_mgr *mgr,
+			struct hci_conn *hcon)
+{
+	struct hci_cp_create_phy_link cp;
+	struct hci_request req;
+
+	cp.phy_handle = hcon->handle;
+
+	BT_DBG("%s hcon %p phy handle 0x%2.2x", hdev->name, hcon,
+	       hcon->handle);
+
+	if (phylink_gen_key(mgr->l2cap_conn->hcon, cp.key, &cp.key_len,
+			    &cp.key_type)) {
+		BT_DBG("Cannot create link key");
+		return;
+	}
+
+	hci_req_init(&req, hdev);
+	hci_req_add(&req, HCI_OP_CREATE_PHY_LINK, sizeof(cp), &cp);
+	hci_req_run(&req, create_phylink_complete);
+}
+
+static void accept_phylink_complete(struct hci_dev *hdev, u8 status,
+				    u16 opcode)
+{
+	struct hci_cp_accept_phy_link *cp;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_ACCEPT_PHY_LINK);
+	if (!cp)
+		return;
+
+	amp_write_remote_assoc(hdev, cp->phy_handle);
+}
+
+void amp_accept_phylink(struct hci_dev *hdev, struct amp_mgr *mgr,
+			struct hci_conn *hcon)
+{
+	struct hci_cp_accept_phy_link cp;
+	struct hci_request req;
+
+	cp.phy_handle = hcon->handle;
+
+	BT_DBG("%s hcon %p phy handle 0x%2.2x", hdev->name, hcon,
+	       hcon->handle);
+
+	if (phylink_gen_key(mgr->l2cap_conn->hcon, cp.key, &cp.key_len,
+			    &cp.key_type)) {
+		BT_DBG("Cannot create link key");
+		return;
+	}
+
+	hci_req_init(&req, hdev);
+	hci_req_add(&req, HCI_OP_ACCEPT_PHY_LINK, sizeof(cp), &cp);
+	hci_req_run(&req, accept_phylink_complete);
+}
+
+void amp_physical_cfm(struct hci_conn *bredr_hcon, struct hci_conn *hs_hcon)
+{
+	struct hci_dev *bredr_hdev = hci_dev_hold(bredr_hcon->hdev);
+	struct amp_mgr *mgr = hs_hcon->amp_mgr;
+	struct l2cap_chan *bredr_chan;
+
+	BT_DBG("bredr_hcon %p hs_hcon %p mgr %p", bredr_hcon, hs_hcon, mgr);
+
+	if (!bredr_hdev || !mgr || !mgr->bredr_chan)
+		return;
+
+	bredr_chan = mgr->bredr_chan;
+
+	l2cap_chan_lock(bredr_chan);
+
+	set_bit(FLAG_EFS_ENABLE, &bredr_chan->flags);
+	bredr_chan->remote_amp_id = hs_hcon->remote_id;
+	bredr_chan->local_amp_id = hs_hcon->hdev->id;
+	bredr_chan->hs_hcon = hs_hcon;
+	bredr_chan->conn->mtu = hs_hcon->hdev->block_mtu;
+
+	__l2cap_physical_cfm(bredr_chan, 0);
+
+	l2cap_chan_unlock(bredr_chan);
+
+	hci_dev_put(bredr_hdev);
+}
+
+void amp_create_logical_link(struct l2cap_chan *chan)
+{
+	struct hci_conn *hs_hcon = chan->hs_hcon;
+	struct hci_cp_create_accept_logical_link cp;
+	struct hci_dev *hdev;
+
+	BT_DBG("chan %p hs_hcon %p dst %pMR", chan, hs_hcon,
+	       &chan->conn->hcon->dst);
+
+	if (!hs_hcon)
+		return;
+
+	hdev = hci_dev_hold(chan->hs_hcon->hdev);
+	if (!hdev)
+		return;
+
+	cp.phy_handle = hs_hcon->handle;
+
+	cp.tx_flow_spec.id = chan->local_id;
+	cp.tx_flow_spec.stype = chan->local_stype;
+	cp.tx_flow_spec.msdu = cpu_to_le16(chan->local_msdu);
+	cp.tx_flow_spec.sdu_itime = cpu_to_le32(chan->local_sdu_itime);
+	cp.tx_flow_spec.acc_lat = cpu_to_le32(chan->local_acc_lat);
+	cp.tx_flow_spec.flush_to = cpu_to_le32(chan->local_flush_to);
+
+	cp.rx_flow_spec.id = chan->remote_id;
+	cp.rx_flow_spec.stype = chan->remote_stype;
+	cp.rx_flow_spec.msdu = cpu_to_le16(chan->remote_msdu);
+	cp.rx_flow_spec.sdu_itime = cpu_to_le32(chan->remote_sdu_itime);
+	cp.rx_flow_spec.acc_lat = cpu_to_le32(chan->remote_acc_lat);
+	cp.rx_flow_spec.flush_to = cpu_to_le32(chan->remote_flush_to);
+
+	if (hs_hcon->out)
+		hci_send_cmd(hdev, HCI_OP_CREATE_LOGICAL_LINK, sizeof(cp),
+			     &cp);
+	else
+		hci_send_cmd(hdev, HCI_OP_ACCEPT_LOGICAL_LINK, sizeof(cp),
+			     &cp);
+
+	hci_dev_put(hdev);
+}
+
+void amp_disconnect_logical_link(struct hci_chan *hchan)
+{
+	struct hci_conn *hcon = hchan->conn;
+	struct hci_cp_disconn_logical_link cp;
+
+	if (hcon->state != BT_CONNECTED) {
+		BT_DBG("hchan %p not connected", hchan);
+		return;
+	}
+
+	cp.log_handle = cpu_to_le16(hchan->handle);
+	hci_send_cmd(hcon->hdev, HCI_OP_DISCONN_LOGICAL_LINK, sizeof(cp), &cp);
+}
+
+void amp_destroy_logical_link(struct hci_chan *hchan, u8 reason)
+{
+	BT_DBG("hchan %p", hchan);
+
+	hci_chan_del(hchan);
+}
diff --git a/net/bluetooth/amp.h b/net/bluetooth/amp.h
new file mode 100644
index 000000000..832764dfb
--- /dev/null
+++ b/net/bluetooth/amp.h
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+   Copyright (c) 2011,2012 Intel Corp.
+
+*/
+
+#ifndef __AMP_H
+#define __AMP_H
+
+struct amp_ctrl {
+	struct list_head	list;
+	struct kref		kref;
+	__u8			id;
+	__u16			assoc_len_so_far;
+	__u16			assoc_rem_len;
+	__u16			assoc_len;
+	__u8			*assoc;
+};
+
+int amp_ctrl_put(struct amp_ctrl *ctrl);
+void amp_ctrl_get(struct amp_ctrl *ctrl);
+struct amp_ctrl *amp_ctrl_add(struct amp_mgr *mgr, u8 id);
+struct amp_ctrl *amp_ctrl_lookup(struct amp_mgr *mgr, u8 id);
+void amp_ctrl_list_flush(struct amp_mgr *mgr);
+
+struct hci_conn *phylink_add(struct hci_dev *hdev, struct amp_mgr *mgr,
+			     u8 remote_id, bool out);
+
+int phylink_gen_key(struct hci_conn *hcon, u8 *data, u8 *len, u8 *type);
+
+void amp_read_loc_info(struct hci_dev *hdev, struct amp_mgr *mgr);
+void amp_read_loc_assoc_frag(struct hci_dev *hdev, u8 phy_handle);
+void amp_read_loc_assoc(struct hci_dev *hdev, struct amp_mgr *mgr);
+void amp_read_loc_assoc_final_data(struct hci_dev *hdev,
+				   struct hci_conn *hcon);
+void amp_create_phylink(struct hci_dev *hdev, struct amp_mgr *mgr,
+			struct hci_conn *hcon);
+void amp_accept_phylink(struct hci_dev *hdev, struct amp_mgr *mgr,
+			struct hci_conn *hcon);
+
+#if IS_ENABLED(CONFIG_BT_HS)
+void amp_create_logical_link(struct l2cap_chan *chan);
+void amp_disconnect_logical_link(struct hci_chan *hchan);
+#else
+static inline void amp_create_logical_link(struct l2cap_chan *chan)
+{
+}
+
+static inline void amp_disconnect_logical_link(struct hci_chan *hchan)
+{
+}
+#endif
+
+void amp_write_remote_assoc(struct hci_dev *hdev, u8 handle);
+void amp_write_rem_assoc_continue(struct hci_dev *hdev, u8 handle);
+void amp_physical_cfm(struct hci_conn *bredr_hcon, struct hci_conn *hs_hcon);
+void amp_create_logical_link(struct l2cap_chan *chan);
+void amp_disconnect_logical_link(struct hci_chan *hchan);
+void amp_destroy_logical_link(struct hci_chan *hchan, u8 reason);
+
+#endif /* __AMP_H */
diff --git a/net/bluetooth/bnep/Kconfig b/net/bluetooth/bnep/Kconfig
new file mode 100644
index 000000000..aac02b5b0
--- /dev/null
+++ b/net/bluetooth/bnep/Kconfig
@@ -0,0 +1,25 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config BT_BNEP
+	tristate "BNEP protocol support"
+	depends on BT_BREDR
+	select CRC32
+	help
+	  BNEP (Bluetooth Network Encapsulation Protocol) is Ethernet
+	  emulation layer on top of Bluetooth.  BNEP is required for
+	  Bluetooth PAN (Personal Area Network).
+
+	  Say Y here to compile BNEP support into the kernel or say M to
+	  compile it as module (bnep).
+
+config BT_BNEP_MC_FILTER
+	bool "Multicast filter support"
+	depends on BT_BNEP
+	help
+	  This option enables the multicast filter support for BNEP.
+
+config BT_BNEP_PROTO_FILTER
+	bool "Protocol filter support"
+	depends on BT_BNEP
+	help
+	  This option enables the protocol filter support for BNEP.
+
diff --git a/net/bluetooth/bnep/Makefile b/net/bluetooth/bnep/Makefile
new file mode 100644
index 000000000..8af9d56bb
--- /dev/null
+++ b/net/bluetooth/bnep/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the Linux Bluetooth BNEP layer.
+#
+
+obj-$(CONFIG_BT_BNEP) += bnep.o
+
+bnep-objs := core.o sock.o netdev.o
diff --git a/net/bluetooth/bnep/bnep.h b/net/bluetooth/bnep/bnep.h
new file mode 100644
index 000000000..9680473ed
--- /dev/null
+++ b/net/bluetooth/bnep/bnep.h
@@ -0,0 +1,173 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+  BNEP protocol definition for Linux Bluetooth stack (BlueZ).
+  Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
+
+*/
+
+#ifndef _BNEP_H
+#define _BNEP_H
+
+#include <linux/types.h>
+#include <linux/crc32.h>
+#include <net/bluetooth/bluetooth.h>
+
+/* Limits */
+#define BNEP_MAX_PROTO_FILTERS		5
+#define BNEP_MAX_MULTICAST_FILTERS	20
+
+/* UUIDs */
+#define BNEP_BASE_UUID	0x0000000000001000800000805F9B34FB
+#define BNEP_UUID16	0x02
+#define BNEP_UUID32	0x04
+#define BNEP_UUID128	0x16
+
+#define BNEP_SVC_PANU	0x1115
+#define BNEP_SVC_NAP	0x1116
+#define BNEP_SVC_GN	0x1117
+
+/* Packet types */
+#define BNEP_GENERAL			0x00
+#define BNEP_CONTROL			0x01
+#define BNEP_COMPRESSED			0x02
+#define BNEP_COMPRESSED_SRC_ONLY	0x03
+#define BNEP_COMPRESSED_DST_ONLY	0x04
+
+/* Control types */
+#define BNEP_CMD_NOT_UNDERSTOOD		0x00
+#define BNEP_SETUP_CONN_REQ		0x01
+#define BNEP_SETUP_CONN_RSP		0x02
+#define BNEP_FILTER_NET_TYPE_SET	0x03
+#define BNEP_FILTER_NET_TYPE_RSP	0x04
+#define BNEP_FILTER_MULTI_ADDR_SET	0x05
+#define BNEP_FILTER_MULTI_ADDR_RSP	0x06
+
+/* Extension types */
+#define BNEP_EXT_CONTROL 0x00
+
+/* Response messages */
+#define BNEP_SUCCESS 0x00
+
+#define BNEP_CONN_INVALID_DST 0x01
+#define BNEP_CONN_INVALID_SRC 0x02
+#define BNEP_CONN_INVALID_SVC 0x03
+#define BNEP_CONN_NOT_ALLOWED 0x04
+
+#define BNEP_FILTER_UNSUPPORTED_REQ	0x01
+#define BNEP_FILTER_INVALID_RANGE	0x02
+#define BNEP_FILTER_INVALID_MCADDR	0x02
+#define BNEP_FILTER_LIMIT_REACHED	0x03
+#define BNEP_FILTER_DENIED_SECURITY	0x04
+
+/* L2CAP settings */
+#define BNEP_MTU	1691
+#define BNEP_PSM	0x0f
+#define BNEP_FLUSH_TO	0xffff
+#define BNEP_CONNECT_TO	15
+#define BNEP_FILTER_TO	15
+
+/* Headers */
+#define BNEP_TYPE_MASK	0x7f
+#define BNEP_EXT_HEADER	0x80
+
+struct bnep_setup_conn_req {
+	__u8 type;
+	__u8 ctrl;
+	__u8 uuid_size;
+	__u8 service[];
+} __packed;
+
+struct bnep_set_filter_req {
+	__u8 type;
+	__u8 ctrl;
+	__be16 len;
+	__u8 list[];
+} __packed;
+
+struct bnep_control_rsp {
+	__u8 type;
+	__u8 ctrl;
+	__be16 resp;
+} __packed;
+
+struct bnep_ext_hdr {
+	__u8 type;
+	__u8 len;
+	__u8 data[];
+} __packed;
+
+/* BNEP ioctl defines */
+#define BNEPCONNADD	_IOW('B', 200, int)
+#define BNEPCONNDEL	_IOW('B', 201, int)
+#define BNEPGETCONNLIST	_IOR('B', 210, int)
+#define BNEPGETCONNINFO	_IOR('B', 211, int)
+#define BNEPGETSUPPFEAT	_IOR('B', 212, int)
+
+#define BNEP_SETUP_RESPONSE	0
+#define BNEP_SETUP_RSP_SENT	10
+
+struct bnep_connadd_req {
+	int   sock;		/* Connected socket */
+	__u32 flags;
+	__u16 role;
+	char  device[16];	/* Name of the Ethernet device */
+};
+
+struct bnep_conndel_req {
+	__u32 flags;
+	__u8  dst[ETH_ALEN];
+};
+
+struct bnep_conninfo {
+	__u32 flags;
+	__u16 role;
+	__u16 state;
+	__u8  dst[ETH_ALEN];
+	char  device[16];
+};
+
+struct bnep_connlist_req {
+	__u32  cnum;
+	struct bnep_conninfo __user *ci;
+};
+
+struct bnep_proto_filter {
+	__u16 start;
+	__u16 end;
+};
+
+int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock);
+int bnep_del_connection(struct bnep_conndel_req *req);
+int bnep_get_connlist(struct bnep_connlist_req *req);
+int bnep_get_conninfo(struct bnep_conninfo *ci);
+
+/* BNEP sessions */
+struct bnep_session {
+	struct list_head list;
+
+	unsigned int  role;
+	unsigned long state;
+	unsigned long flags;
+	atomic_t      terminate;
+	struct task_struct *task;
+
+	struct ethhdr eh;
+	struct msghdr msg;
+
+	struct bnep_proto_filter proto_filter[BNEP_MAX_PROTO_FILTERS];
+	unsigned long long mc_filter;
+
+	struct socket    *sock;
+	struct net_device *dev;
+};
+
+void bnep_net_setup(struct net_device *dev);
+int bnep_sock_init(void);
+void bnep_sock_cleanup(void);
+
+static inline int bnep_mc_hash(__u8 *addr)
+{
+	return crc32_be(~0, addr, ETH_ALEN) >> 26;
+}
+
+#endif
diff --git a/net/bluetooth/bnep/core.c b/net/bluetooth/bnep/core.c
new file mode 100644
index 000000000..43c284158
--- /dev/null
+++ b/net/bluetooth/bnep/core.c
@@ -0,0 +1,769 @@
+/*
+   BNEP implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2001-2002 Inventel Systemes
+   Written 2001-2002 by
+	Clément Moreau <clement.moreau@inventel.fr>
+	David Libault  <david.libault@inventel.fr>
+
+   Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#include <linux/module.h>
+#include <linux/kthread.h>
+#include <linux/file.h>
+#include <linux/etherdevice.h>
+#include <asm/unaligned.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/l2cap.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "bnep.h"
+
+#define VERSION "1.3"
+
+static bool compress_src = true;
+static bool compress_dst = true;
+
+static LIST_HEAD(bnep_session_list);
+static DECLARE_RWSEM(bnep_session_sem);
+
+static struct bnep_session *__bnep_get_session(u8 *dst)
+{
+	struct bnep_session *s;
+
+	BT_DBG("");
+
+	list_for_each_entry(s, &bnep_session_list, list)
+		if (ether_addr_equal(dst, s->eh.h_source))
+			return s;
+
+	return NULL;
+}
+
+static void __bnep_link_session(struct bnep_session *s)
+{
+	list_add(&s->list, &bnep_session_list);
+}
+
+static void __bnep_unlink_session(struct bnep_session *s)
+{
+	list_del(&s->list);
+}
+
+static int bnep_send(struct bnep_session *s, void *data, size_t len)
+{
+	struct socket *sock = s->sock;
+	struct kvec iv = { data, len };
+
+	return kernel_sendmsg(sock, &s->msg, &iv, 1, len);
+}
+
+static int bnep_send_rsp(struct bnep_session *s, u8 ctrl, u16 resp)
+{
+	struct bnep_control_rsp rsp;
+	rsp.type = BNEP_CONTROL;
+	rsp.ctrl = ctrl;
+	rsp.resp = htons(resp);
+	return bnep_send(s, &rsp, sizeof(rsp));
+}
+
+#ifdef CONFIG_BT_BNEP_PROTO_FILTER
+static inline void bnep_set_default_proto_filter(struct bnep_session *s)
+{
+	/* (IPv4, ARP)  */
+	s->proto_filter[0].start = ETH_P_IP;
+	s->proto_filter[0].end   = ETH_P_ARP;
+	/* (RARP, AppleTalk) */
+	s->proto_filter[1].start = ETH_P_RARP;
+	s->proto_filter[1].end   = ETH_P_AARP;
+	/* (IPX, IPv6) */
+	s->proto_filter[2].start = ETH_P_IPX;
+	s->proto_filter[2].end   = ETH_P_IPV6;
+}
+#endif
+
+static int bnep_ctrl_set_netfilter(struct bnep_session *s, __be16 *data, int len)
+{
+	int n;
+
+	if (len < 2)
+		return -EILSEQ;
+
+	n = get_unaligned_be16(data);
+	data++;
+	len -= 2;
+
+	if (len < n)
+		return -EILSEQ;
+
+	BT_DBG("filter len %d", n);
+
+#ifdef CONFIG_BT_BNEP_PROTO_FILTER
+	n /= 4;
+	if (n <= BNEP_MAX_PROTO_FILTERS) {
+		struct bnep_proto_filter *f = s->proto_filter;
+		int i;
+
+		for (i = 0; i < n; i++) {
+			f[i].start = get_unaligned_be16(data++);
+			f[i].end   = get_unaligned_be16(data++);
+
+			BT_DBG("proto filter start %d end %d",
+				f[i].start, f[i].end);
+		}
+
+		if (i < BNEP_MAX_PROTO_FILTERS)
+			memset(f + i, 0, sizeof(*f));
+
+		if (n == 0)
+			bnep_set_default_proto_filter(s);
+
+		bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_SUCCESS);
+	} else {
+		bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_LIMIT_REACHED);
+	}
+#else
+	bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_UNSUPPORTED_REQ);
+#endif
+	return 0;
+}
+
+static int bnep_ctrl_set_mcfilter(struct bnep_session *s, u8 *data, int len)
+{
+	int n;
+
+	if (len < 2)
+		return -EILSEQ;
+
+	n = get_unaligned_be16(data);
+	data += 2;
+	len -= 2;
+
+	if (len < n)
+		return -EILSEQ;
+
+	BT_DBG("filter len %d", n);
+
+#ifdef CONFIG_BT_BNEP_MC_FILTER
+	n /= (ETH_ALEN * 2);
+
+	if (n > 0) {
+		int i;
+
+		s->mc_filter = 0;
+
+		/* Always send broadcast */
+		set_bit(bnep_mc_hash(s->dev->broadcast), (ulong *) &s->mc_filter);
+
+		/* Add address ranges to the multicast hash */
+		for (; n > 0; n--) {
+			u8 a1[6], *a2;
+
+			memcpy(a1, data, ETH_ALEN);
+			data += ETH_ALEN;
+			a2 = data;
+			data += ETH_ALEN;
+
+			BT_DBG("mc filter %pMR -> %pMR", a1, a2);
+
+			/* Iterate from a1 to a2 */
+			set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter);
+			while (memcmp(a1, a2, 6) < 0 && s->mc_filter != ~0LL) {
+				/* Increment a1 */
+				i = 5;
+				while (i >= 0 && ++a1[i--] == 0)
+					;
+
+				set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter);
+			}
+		}
+	}
+
+	BT_DBG("mc filter hash 0x%llx", s->mc_filter);
+
+	bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_SUCCESS);
+#else
+	bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_FILTER_UNSUPPORTED_REQ);
+#endif
+	return 0;
+}
+
+static int bnep_rx_control(struct bnep_session *s, void *data, int len)
+{
+	u8  cmd = *(u8 *)data;
+	int err = 0;
+
+	data++;
+	len--;
+
+	switch (cmd) {
+	case BNEP_CMD_NOT_UNDERSTOOD:
+	case BNEP_SETUP_CONN_RSP:
+	case BNEP_FILTER_NET_TYPE_RSP:
+	case BNEP_FILTER_MULTI_ADDR_RSP:
+		/* Ignore these for now */
+		break;
+
+	case BNEP_FILTER_NET_TYPE_SET:
+		err = bnep_ctrl_set_netfilter(s, data, len);
+		break;
+
+	case BNEP_FILTER_MULTI_ADDR_SET:
+		err = bnep_ctrl_set_mcfilter(s, data, len);
+		break;
+
+	case BNEP_SETUP_CONN_REQ:
+		/* Successful response should be sent only once */
+		if (test_bit(BNEP_SETUP_RESPONSE, &s->flags) &&
+		    !test_and_set_bit(BNEP_SETUP_RSP_SENT, &s->flags))
+			err = bnep_send_rsp(s, BNEP_SETUP_CONN_RSP,
+					    BNEP_SUCCESS);
+		else
+			err = bnep_send_rsp(s, BNEP_SETUP_CONN_RSP,
+					    BNEP_CONN_NOT_ALLOWED);
+		break;
+
+	default: {
+			u8 pkt[3];
+			pkt[0] = BNEP_CONTROL;
+			pkt[1] = BNEP_CMD_NOT_UNDERSTOOD;
+			pkt[2] = cmd;
+			err = bnep_send(s, pkt, sizeof(pkt));
+		}
+		break;
+	}
+
+	return err;
+}
+
+static int bnep_rx_extension(struct bnep_session *s, struct sk_buff *skb)
+{
+	struct bnep_ext_hdr *h;
+	int err = 0;
+
+	do {
+		h = (void *) skb->data;
+		if (!skb_pull(skb, sizeof(*h))) {
+			err = -EILSEQ;
+			break;
+		}
+
+		BT_DBG("type 0x%x len %d", h->type, h->len);
+
+		switch (h->type & BNEP_TYPE_MASK) {
+		case BNEP_EXT_CONTROL:
+			bnep_rx_control(s, skb->data, skb->len);
+			break;
+
+		default:
+			/* Unknown extension, skip it. */
+			break;
+		}
+
+		if (!skb_pull(skb, h->len)) {
+			err = -EILSEQ;
+			break;
+		}
+	} while (!err && (h->type & BNEP_EXT_HEADER));
+
+	return err;
+}
+
+static u8 __bnep_rx_hlen[] = {
+	ETH_HLEN,     /* BNEP_GENERAL */
+	0,            /* BNEP_CONTROL */
+	2,            /* BNEP_COMPRESSED */
+	ETH_ALEN + 2, /* BNEP_COMPRESSED_SRC_ONLY */
+	ETH_ALEN + 2  /* BNEP_COMPRESSED_DST_ONLY */
+};
+
+static int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb)
+{
+	struct net_device *dev = s->dev;
+	struct sk_buff *nskb;
+	u8 type, ctrl_type;
+
+	dev->stats.rx_bytes += skb->len;
+
+	type = *(u8 *) skb->data;
+	skb_pull(skb, 1);
+	ctrl_type = *(u8 *)skb->data;
+
+	if ((type & BNEP_TYPE_MASK) >= sizeof(__bnep_rx_hlen))
+		goto badframe;
+
+	if ((type & BNEP_TYPE_MASK) == BNEP_CONTROL) {
+		if (bnep_rx_control(s, skb->data, skb->len) < 0) {
+			dev->stats.tx_errors++;
+			kfree_skb(skb);
+			return 0;
+		}
+
+		if (!(type & BNEP_EXT_HEADER)) {
+			kfree_skb(skb);
+			return 0;
+		}
+
+		/* Verify and pull ctrl message since it's already processed */
+		switch (ctrl_type) {
+		case BNEP_SETUP_CONN_REQ:
+			/* Pull: ctrl type (1 b), len (1 b), data (len bytes) */
+			if (!skb_pull(skb, 2 + *(u8 *)(skb->data + 1) * 2))
+				goto badframe;
+			break;
+		case BNEP_FILTER_MULTI_ADDR_SET:
+		case BNEP_FILTER_NET_TYPE_SET:
+			/* Pull: ctrl type (1 b), len (2 b), data (len bytes) */
+			if (!skb_pull(skb, 3 + *(u16 *)(skb->data + 1) * 2))
+				goto badframe;
+			break;
+		default:
+			kfree_skb(skb);
+			return 0;
+		}
+	} else {
+		skb_reset_mac_header(skb);
+
+		/* Verify and pull out header */
+		if (!skb_pull(skb, __bnep_rx_hlen[type & BNEP_TYPE_MASK]))
+			goto badframe;
+
+		s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2));
+	}
+
+	if (type & BNEP_EXT_HEADER) {
+		if (bnep_rx_extension(s, skb) < 0)
+			goto badframe;
+	}
+
+	/* Strip 802.1p header */
+	if (ntohs(s->eh.h_proto) == ETH_P_8021Q) {
+		if (!skb_pull(skb, 4))
+			goto badframe;
+		s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2));
+	}
+
+	/* We have to alloc new skb and copy data here :(. Because original skb
+	 * may not be modified and because of the alignment requirements. */
+	nskb = alloc_skb(2 + ETH_HLEN + skb->len, GFP_KERNEL);
+	if (!nskb) {
+		dev->stats.rx_dropped++;
+		kfree_skb(skb);
+		return -ENOMEM;
+	}
+	skb_reserve(nskb, 2);
+
+	/* Decompress header and construct ether frame */
+	switch (type & BNEP_TYPE_MASK) {
+	case BNEP_COMPRESSED:
+		__skb_put_data(nskb, &s->eh, ETH_HLEN);
+		break;
+
+	case BNEP_COMPRESSED_SRC_ONLY:
+		__skb_put_data(nskb, s->eh.h_dest, ETH_ALEN);
+		__skb_put_data(nskb, skb_mac_header(skb), ETH_ALEN);
+		put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2));
+		break;
+
+	case BNEP_COMPRESSED_DST_ONLY:
+		__skb_put_data(nskb, skb_mac_header(skb), ETH_ALEN);
+		__skb_put_data(nskb, s->eh.h_source, ETH_ALEN + 2);
+		break;
+
+	case BNEP_GENERAL:
+		__skb_put_data(nskb, skb_mac_header(skb), ETH_ALEN * 2);
+		put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2));
+		break;
+	}
+
+	skb_copy_from_linear_data(skb, __skb_put(nskb, skb->len), skb->len);
+	kfree_skb(skb);
+
+	dev->stats.rx_packets++;
+	nskb->ip_summed = CHECKSUM_NONE;
+	nskb->protocol  = eth_type_trans(nskb, dev);
+	netif_rx_ni(nskb);
+	return 0;
+
+badframe:
+	dev->stats.rx_errors++;
+	kfree_skb(skb);
+	return 0;
+}
+
+static u8 __bnep_tx_types[] = {
+	BNEP_GENERAL,
+	BNEP_COMPRESSED_SRC_ONLY,
+	BNEP_COMPRESSED_DST_ONLY,
+	BNEP_COMPRESSED
+};
+
+static int bnep_tx_frame(struct bnep_session *s, struct sk_buff *skb)
+{
+	struct ethhdr *eh = (void *) skb->data;
+	struct socket *sock = s->sock;
+	struct kvec iv[3];
+	int len = 0, il = 0;
+	u8 type = 0;
+
+	BT_DBG("skb %p dev %p type %d", skb, skb->dev, skb->pkt_type);
+
+	if (!skb->dev) {
+		/* Control frame sent by us */
+		goto send;
+	}
+
+	iv[il++] = (struct kvec) { &type, 1 };
+	len++;
+
+	if (compress_src && ether_addr_equal(eh->h_dest, s->eh.h_source))
+		type |= 0x01;
+
+	if (compress_dst && ether_addr_equal(eh->h_source, s->eh.h_dest))
+		type |= 0x02;
+
+	if (type)
+		skb_pull(skb, ETH_ALEN * 2);
+
+	type = __bnep_tx_types[type];
+	switch (type) {
+	case BNEP_COMPRESSED_SRC_ONLY:
+		iv[il++] = (struct kvec) { eh->h_source, ETH_ALEN };
+		len += ETH_ALEN;
+		break;
+
+	case BNEP_COMPRESSED_DST_ONLY:
+		iv[il++] = (struct kvec) { eh->h_dest, ETH_ALEN };
+		len += ETH_ALEN;
+		break;
+	}
+
+send:
+	iv[il++] = (struct kvec) { skb->data, skb->len };
+	len += skb->len;
+
+	/* FIXME: linearize skb */
+	{
+		len = kernel_sendmsg(sock, &s->msg, iv, il, len);
+	}
+	kfree_skb(skb);
+
+	if (len > 0) {
+		s->dev->stats.tx_bytes += len;
+		s->dev->stats.tx_packets++;
+		return 0;
+	}
+
+	return len;
+}
+
+static int bnep_session(void *arg)
+{
+	struct bnep_session *s = arg;
+	struct net_device *dev = s->dev;
+	struct sock *sk = s->sock->sk;
+	struct sk_buff *skb;
+	DEFINE_WAIT_FUNC(wait, woken_wake_function);
+
+	BT_DBG("");
+
+	set_user_nice(current, -15);
+
+	add_wait_queue(sk_sleep(sk), &wait);
+	while (1) {
+		if (atomic_read(&s->terminate))
+			break;
+		/* RX */
+		while ((skb = skb_dequeue(&sk->sk_receive_queue))) {
+			skb_orphan(skb);
+			if (!skb_linearize(skb))
+				bnep_rx_frame(s, skb);
+			else
+				kfree_skb(skb);
+		}
+
+		if (sk->sk_state != BT_CONNECTED)
+			break;
+
+		/* TX */
+		while ((skb = skb_dequeue(&sk->sk_write_queue)))
+			if (bnep_tx_frame(s, skb))
+				break;
+		netif_wake_queue(dev);
+
+		/*
+		 * wait_woken() performs the necessary memory barriers
+		 * for us; see the header comment for this primitive.
+		 */
+		wait_woken(&wait, TASK_INTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
+	}
+	remove_wait_queue(sk_sleep(sk), &wait);
+
+	/* Cleanup session */
+	down_write(&bnep_session_sem);
+
+	/* Delete network device */
+	unregister_netdev(dev);
+
+	/* Wakeup user-space polling for socket errors */
+	s->sock->sk->sk_err = EUNATCH;
+
+	wake_up_interruptible(sk_sleep(s->sock->sk));
+
+	/* Release the socket */
+	fput(s->sock->file);
+
+	__bnep_unlink_session(s);
+
+	up_write(&bnep_session_sem);
+	free_netdev(dev);
+	module_put_and_exit(0);
+	return 0;
+}
+
+static struct device *bnep_get_device(struct bnep_session *session)
+{
+	struct l2cap_conn *conn = l2cap_pi(session->sock->sk)->chan->conn;
+
+	if (!conn || !conn->hcon)
+		return NULL;
+
+	return &conn->hcon->dev;
+}
+
+static struct device_type bnep_type = {
+	.name	= "bluetooth",
+};
+
+int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock)
+{
+	u32 valid_flags = BIT(BNEP_SETUP_RESPONSE);
+	struct net_device *dev;
+	struct bnep_session *s, *ss;
+	u8 dst[ETH_ALEN], src[ETH_ALEN];
+	int err;
+
+	BT_DBG("");
+
+	if (!l2cap_is_socket(sock))
+		return -EBADFD;
+
+	if (req->flags & ~valid_flags)
+		return -EINVAL;
+
+	baswap((void *) dst, &l2cap_pi(sock->sk)->chan->dst);
+	baswap((void *) src, &l2cap_pi(sock->sk)->chan->src);
+
+	/* session struct allocated as private part of net_device */
+	dev = alloc_netdev(sizeof(struct bnep_session),
+			   (*req->device) ? req->device : "bnep%d",
+			   NET_NAME_UNKNOWN,
+			   bnep_net_setup);
+	if (!dev)
+		return -ENOMEM;
+
+	down_write(&bnep_session_sem);
+
+	ss = __bnep_get_session(dst);
+	if (ss && ss->state == BT_CONNECTED) {
+		err = -EEXIST;
+		goto failed;
+	}
+
+	s = netdev_priv(dev);
+
+	/* This is rx header therefore addresses are swapped.
+	 * ie. eh.h_dest is our local address. */
+	memcpy(s->eh.h_dest,   &src, ETH_ALEN);
+	memcpy(s->eh.h_source, &dst, ETH_ALEN);
+	memcpy(dev->dev_addr, s->eh.h_dest, ETH_ALEN);
+
+	s->dev   = dev;
+	s->sock  = sock;
+	s->role  = req->role;
+	s->state = BT_CONNECTED;
+	s->flags = req->flags;
+
+	s->msg.msg_flags = MSG_NOSIGNAL;
+
+#ifdef CONFIG_BT_BNEP_MC_FILTER
+	/* Set default mc filter to not filter out any mc addresses
+	 * as defined in the BNEP specification (revision 0.95a)
+	 * http://grouper.ieee.org/groups/802/15/Bluetooth/BNEP.pdf
+	 */
+	s->mc_filter = ~0LL;
+#endif
+
+#ifdef CONFIG_BT_BNEP_PROTO_FILTER
+	/* Set default protocol filter */
+	bnep_set_default_proto_filter(s);
+#endif
+
+	SET_NETDEV_DEV(dev, bnep_get_device(s));
+	SET_NETDEV_DEVTYPE(dev, &bnep_type);
+
+	err = register_netdev(dev);
+	if (err)
+		goto failed;
+
+	__bnep_link_session(s);
+
+	__module_get(THIS_MODULE);
+	s->task = kthread_run(bnep_session, s, "kbnepd %s", dev->name);
+	if (IS_ERR(s->task)) {
+		/* Session thread start failed, gotta cleanup. */
+		module_put(THIS_MODULE);
+		unregister_netdev(dev);
+		__bnep_unlink_session(s);
+		err = PTR_ERR(s->task);
+		goto failed;
+	}
+
+	up_write(&bnep_session_sem);
+	strcpy(req->device, dev->name);
+	return 0;
+
+failed:
+	up_write(&bnep_session_sem);
+	free_netdev(dev);
+	return err;
+}
+
+int bnep_del_connection(struct bnep_conndel_req *req)
+{
+	u32 valid_flags = 0;
+	struct bnep_session *s;
+	int  err = 0;
+
+	BT_DBG("");
+
+	if (req->flags & ~valid_flags)
+		return -EINVAL;
+
+	down_read(&bnep_session_sem);
+
+	s = __bnep_get_session(req->dst);
+	if (s) {
+		atomic_inc(&s->terminate);
+		wake_up_interruptible(sk_sleep(s->sock->sk));
+	} else
+		err = -ENOENT;
+
+	up_read(&bnep_session_sem);
+	return err;
+}
+
+static void __bnep_copy_ci(struct bnep_conninfo *ci, struct bnep_session *s)
+{
+	u32 valid_flags = BIT(BNEP_SETUP_RESPONSE);
+
+	memset(ci, 0, sizeof(*ci));
+	memcpy(ci->dst, s->eh.h_source, ETH_ALEN);
+	strcpy(ci->device, s->dev->name);
+	ci->flags = s->flags & valid_flags;
+	ci->state = s->state;
+	ci->role  = s->role;
+}
+
+int bnep_get_connlist(struct bnep_connlist_req *req)
+{
+	struct bnep_session *s;
+	int err = 0, n = 0;
+
+	down_read(&bnep_session_sem);
+
+	list_for_each_entry(s, &bnep_session_list, list) {
+		struct bnep_conninfo ci;
+
+		__bnep_copy_ci(&ci, s);
+
+		if (copy_to_user(req->ci, &ci, sizeof(ci))) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (++n >= req->cnum)
+			break;
+
+		req->ci++;
+	}
+	req->cnum = n;
+
+	up_read(&bnep_session_sem);
+	return err;
+}
+
+int bnep_get_conninfo(struct bnep_conninfo *ci)
+{
+	struct bnep_session *s;
+	int err = 0;
+
+	down_read(&bnep_session_sem);
+
+	s = __bnep_get_session(ci->dst);
+	if (s)
+		__bnep_copy_ci(ci, s);
+	else
+		err = -ENOENT;
+
+	up_read(&bnep_session_sem);
+	return err;
+}
+
+static int __init bnep_init(void)
+{
+	char flt[50] = "";
+
+#ifdef CONFIG_BT_BNEP_PROTO_FILTER
+	strcat(flt, "protocol ");
+#endif
+
+#ifdef CONFIG_BT_BNEP_MC_FILTER
+	strcat(flt, "multicast");
+#endif
+
+	BT_INFO("BNEP (Ethernet Emulation) ver %s", VERSION);
+	if (flt[0])
+		BT_INFO("BNEP filters: %s", flt);
+
+	bnep_sock_init();
+	return 0;
+}
+
+static void __exit bnep_exit(void)
+{
+	bnep_sock_cleanup();
+}
+
+module_init(bnep_init);
+module_exit(bnep_exit);
+
+module_param(compress_src, bool, 0644);
+MODULE_PARM_DESC(compress_src, "Compress sources headers");
+
+module_param(compress_dst, bool, 0644);
+MODULE_PARM_DESC(compress_dst, "Compress destination headers");
+
+MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
+MODULE_DESCRIPTION("Bluetooth BNEP ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("bt-proto-4");
diff --git a/net/bluetooth/bnep/netdev.c b/net/bluetooth/bnep/netdev.c
new file mode 100644
index 000000000..cc1cff631
--- /dev/null
+++ b/net/bluetooth/bnep/netdev.c
@@ -0,0 +1,230 @@
+/*
+   BNEP implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2001-2002 Inventel Systemes
+   Written 2001-2002 by
+	Clément Moreau <clement.moreau@inventel.fr>
+	David Libault  <david.libault@inventel.fr>
+
+   Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#include <linux/etherdevice.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/l2cap.h>
+
+#include "bnep.h"
+
+#define BNEP_TX_QUEUE_LEN 20
+
+static int bnep_net_open(struct net_device *dev)
+{
+	netif_start_queue(dev);
+	return 0;
+}
+
+static int bnep_net_close(struct net_device *dev)
+{
+	netif_stop_queue(dev);
+	return 0;
+}
+
+static void bnep_net_set_mc_list(struct net_device *dev)
+{
+#ifdef CONFIG_BT_BNEP_MC_FILTER
+	struct bnep_session *s = netdev_priv(dev);
+	struct sock *sk = s->sock->sk;
+	struct bnep_set_filter_req *r;
+	struct sk_buff *skb;
+	int size;
+
+	BT_DBG("%s mc_count %d", dev->name, netdev_mc_count(dev));
+
+	size = sizeof(*r) + (BNEP_MAX_MULTICAST_FILTERS + 1) * ETH_ALEN * 2;
+	skb  = alloc_skb(size, GFP_ATOMIC);
+	if (!skb) {
+		BT_ERR("%s Multicast list allocation failed", dev->name);
+		return;
+	}
+
+	r = (void *) skb->data;
+	__skb_put(skb, sizeof(*r));
+
+	r->type = BNEP_CONTROL;
+	r->ctrl = BNEP_FILTER_MULTI_ADDR_SET;
+
+	if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
+		u8 start[ETH_ALEN] = { 0x01 };
+
+		/* Request all addresses */
+		__skb_put_data(skb, start, ETH_ALEN);
+		__skb_put_data(skb, dev->broadcast, ETH_ALEN);
+		r->len = htons(ETH_ALEN * 2);
+	} else {
+		struct netdev_hw_addr *ha;
+		int i, len = skb->len;
+
+		if (dev->flags & IFF_BROADCAST) {
+			__skb_put_data(skb, dev->broadcast, ETH_ALEN);
+			__skb_put_data(skb, dev->broadcast, ETH_ALEN);
+		}
+
+		/* FIXME: We should group addresses here. */
+
+		i = 0;
+		netdev_for_each_mc_addr(ha, dev) {
+			if (i == BNEP_MAX_MULTICAST_FILTERS)
+				break;
+			__skb_put_data(skb, ha->addr, ETH_ALEN);
+			__skb_put_data(skb, ha->addr, ETH_ALEN);
+
+			i++;
+		}
+		r->len = htons(skb->len - len);
+	}
+
+	skb_queue_tail(&sk->sk_write_queue, skb);
+	wake_up_interruptible(sk_sleep(sk));
+#endif
+}
+
+static int bnep_net_set_mac_addr(struct net_device *dev, void *arg)
+{
+	BT_DBG("%s", dev->name);
+	return 0;
+}
+
+static void bnep_net_timeout(struct net_device *dev, unsigned int txqueue)
+{
+	BT_DBG("net_timeout");
+	netif_wake_queue(dev);
+}
+
+#ifdef CONFIG_BT_BNEP_MC_FILTER
+static int bnep_net_mc_filter(struct sk_buff *skb, struct bnep_session *s)
+{
+	struct ethhdr *eh = (void *) skb->data;
+
+	if ((eh->h_dest[0] & 1) && !test_bit(bnep_mc_hash(eh->h_dest), (ulong *) &s->mc_filter))
+		return 1;
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_BT_BNEP_PROTO_FILTER
+/* Determine ether protocol. Based on eth_type_trans. */
+static u16 bnep_net_eth_proto(struct sk_buff *skb)
+{
+	struct ethhdr *eh = (void *) skb->data;
+	u16 proto = ntohs(eh->h_proto);
+
+	if (proto >= ETH_P_802_3_MIN)
+		return proto;
+
+	if (get_unaligned((__be16 *) skb->data) == htons(0xFFFF))
+		return ETH_P_802_3;
+
+	return ETH_P_802_2;
+}
+
+static int bnep_net_proto_filter(struct sk_buff *skb, struct bnep_session *s)
+{
+	u16 proto = bnep_net_eth_proto(skb);
+	struct bnep_proto_filter *f = s->proto_filter;
+	int i;
+
+	for (i = 0; i < BNEP_MAX_PROTO_FILTERS && f[i].end; i++) {
+		if (proto >= f[i].start && proto <= f[i].end)
+			return 0;
+	}
+
+	BT_DBG("BNEP: filtered skb %p, proto 0x%.4x", skb, proto);
+	return 1;
+}
+#endif
+
+static netdev_tx_t bnep_net_xmit(struct sk_buff *skb,
+				 struct net_device *dev)
+{
+	struct bnep_session *s = netdev_priv(dev);
+	struct sock *sk = s->sock->sk;
+
+	BT_DBG("skb %p, dev %p", skb, dev);
+
+#ifdef CONFIG_BT_BNEP_MC_FILTER
+	if (bnep_net_mc_filter(skb, s)) {
+		kfree_skb(skb);
+		return NETDEV_TX_OK;
+	}
+#endif
+
+#ifdef CONFIG_BT_BNEP_PROTO_FILTER
+	if (bnep_net_proto_filter(skb, s)) {
+		kfree_skb(skb);
+		return NETDEV_TX_OK;
+	}
+#endif
+
+	/*
+	 * We cannot send L2CAP packets from here as we are potentially in a bh.
+	 * So we have to queue them and wake up session thread which is sleeping
+	 * on the sk_sleep(sk).
+	 */
+	netif_trans_update(dev);
+	skb_queue_tail(&sk->sk_write_queue, skb);
+	wake_up_interruptible(sk_sleep(sk));
+
+	if (skb_queue_len(&sk->sk_write_queue) >= BNEP_TX_QUEUE_LEN) {
+		BT_DBG("tx queue is full");
+
+		/* Stop queuing.
+		 * Session thread will do netif_wake_queue() */
+		netif_stop_queue(dev);
+	}
+
+	return NETDEV_TX_OK;
+}
+
+static const struct net_device_ops bnep_netdev_ops = {
+	.ndo_open            = bnep_net_open,
+	.ndo_stop            = bnep_net_close,
+	.ndo_start_xmit	     = bnep_net_xmit,
+	.ndo_validate_addr   = eth_validate_addr,
+	.ndo_set_rx_mode     = bnep_net_set_mc_list,
+	.ndo_set_mac_address = bnep_net_set_mac_addr,
+	.ndo_tx_timeout      = bnep_net_timeout,
+
+};
+
+void bnep_net_setup(struct net_device *dev)
+{
+
+	eth_broadcast_addr(dev->broadcast);
+	dev->addr_len = ETH_ALEN;
+
+	ether_setup(dev);
+	dev->min_mtu = 0;
+	dev->max_mtu = ETH_MAX_MTU;
+	dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+	dev->netdev_ops = &bnep_netdev_ops;
+
+	dev->watchdog_timeo  = HZ * 2;
+}
diff --git a/net/bluetooth/bnep/sock.c b/net/bluetooth/bnep/sock.c
new file mode 100644
index 000000000..d515571b2
--- /dev/null
+++ b/net/bluetooth/bnep/sock.c
@@ -0,0 +1,267 @@
+/*
+   BNEP implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2001-2002 Inventel Systemes
+   Written 2001-2002 by
+	David Libault  <david.libault@inventel.fr>
+
+   Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#include <linux/export.h>
+#include <linux/file.h>
+
+#include "bnep.h"
+
+static struct bt_sock_list bnep_sk_list = {
+	.lock = __RW_LOCK_UNLOCKED(bnep_sk_list.lock)
+};
+
+static int bnep_sock_release(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+
+	BT_DBG("sock %p sk %p", sock, sk);
+
+	if (!sk)
+		return 0;
+
+	bt_sock_unlink(&bnep_sk_list, sk);
+
+	sock_orphan(sk);
+	sock_put(sk);
+	return 0;
+}
+
+static int do_bnep_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp)
+{
+	struct bnep_connlist_req cl;
+	struct bnep_connadd_req  ca;
+	struct bnep_conndel_req  cd;
+	struct bnep_conninfo ci;
+	struct socket *nsock;
+	__u32 supp_feat = BIT(BNEP_SETUP_RESPONSE);
+	int err;
+
+	BT_DBG("cmd %x arg %p", cmd, argp);
+
+	switch (cmd) {
+	case BNEPCONNADD:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+
+		if (copy_from_user(&ca, argp, sizeof(ca)))
+			return -EFAULT;
+
+		nsock = sockfd_lookup(ca.sock, &err);
+		if (!nsock)
+			return err;
+
+		if (nsock->sk->sk_state != BT_CONNECTED) {
+			sockfd_put(nsock);
+			return -EBADFD;
+		}
+		ca.device[sizeof(ca.device)-1] = 0;
+
+		err = bnep_add_connection(&ca, nsock);
+		if (!err) {
+			if (copy_to_user(argp, &ca, sizeof(ca)))
+				err = -EFAULT;
+		} else
+			sockfd_put(nsock);
+
+		return err;
+
+	case BNEPCONNDEL:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+
+		if (copy_from_user(&cd, argp, sizeof(cd)))
+			return -EFAULT;
+
+		return bnep_del_connection(&cd);
+
+	case BNEPGETCONNLIST:
+		if (copy_from_user(&cl, argp, sizeof(cl)))
+			return -EFAULT;
+
+		if (cl.cnum <= 0)
+			return -EINVAL;
+
+		err = bnep_get_connlist(&cl);
+		if (!err && copy_to_user(argp, &cl, sizeof(cl)))
+			return -EFAULT;
+
+		return err;
+
+	case BNEPGETCONNINFO:
+		if (copy_from_user(&ci, argp, sizeof(ci)))
+			return -EFAULT;
+
+		err = bnep_get_conninfo(&ci);
+		if (!err && copy_to_user(argp, &ci, sizeof(ci)))
+			return -EFAULT;
+
+		return err;
+
+	case BNEPGETSUPPFEAT:
+		if (copy_to_user(argp, &supp_feat, sizeof(supp_feat)))
+			return -EFAULT;
+
+		return 0;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+	return do_bnep_sock_ioctl(sock, cmd, (void __user *)arg);
+}
+
+#ifdef CONFIG_COMPAT
+static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+	void __user *argp = compat_ptr(arg);
+	if (cmd == BNEPGETCONNLIST) {
+		struct bnep_connlist_req cl;
+		unsigned __user *p = argp;
+		u32 uci;
+		int err;
+
+		if (get_user(cl.cnum, p) || get_user(uci, p + 1))
+			return -EFAULT;
+
+		cl.ci = compat_ptr(uci);
+
+		if (cl.cnum <= 0)
+			return -EINVAL;
+
+		err = bnep_get_connlist(&cl);
+
+		if (!err && put_user(cl.cnum, p))
+			err = -EFAULT;
+
+		return err;
+	}
+
+	return do_bnep_sock_ioctl(sock, cmd, argp);
+}
+#endif
+
+static const struct proto_ops bnep_sock_ops = {
+	.family		= PF_BLUETOOTH,
+	.owner		= THIS_MODULE,
+	.release	= bnep_sock_release,
+	.ioctl		= bnep_sock_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= bnep_sock_compat_ioctl,
+#endif
+	.bind		= sock_no_bind,
+	.getname	= sock_no_getname,
+	.sendmsg	= sock_no_sendmsg,
+	.recvmsg	= sock_no_recvmsg,
+	.listen		= sock_no_listen,
+	.shutdown	= sock_no_shutdown,
+	.connect	= sock_no_connect,
+	.socketpair	= sock_no_socketpair,
+	.accept		= sock_no_accept,
+	.mmap		= sock_no_mmap
+};
+
+static struct proto bnep_proto = {
+	.name		= "BNEP",
+	.owner		= THIS_MODULE,
+	.obj_size	= sizeof(struct bt_sock)
+};
+
+static int bnep_sock_create(struct net *net, struct socket *sock, int protocol,
+			    int kern)
+{
+	struct sock *sk;
+
+	BT_DBG("sock %p", sock);
+
+	if (sock->type != SOCK_RAW)
+		return -ESOCKTNOSUPPORT;
+
+	sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto, kern);
+	if (!sk)
+		return -ENOMEM;
+
+	sock_init_data(sock, sk);
+
+	sock->ops = &bnep_sock_ops;
+
+	sock->state = SS_UNCONNECTED;
+
+	sock_reset_flag(sk, SOCK_ZAPPED);
+
+	sk->sk_protocol = protocol;
+	sk->sk_state	= BT_OPEN;
+
+	bt_sock_link(&bnep_sk_list, sk);
+	return 0;
+}
+
+static const struct net_proto_family bnep_sock_family_ops = {
+	.family = PF_BLUETOOTH,
+	.owner	= THIS_MODULE,
+	.create = bnep_sock_create
+};
+
+int __init bnep_sock_init(void)
+{
+	int err;
+
+	err = proto_register(&bnep_proto, 0);
+	if (err < 0)
+		return err;
+
+	err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops);
+	if (err < 0) {
+		BT_ERR("Can't register BNEP socket");
+		goto error;
+	}
+
+	err = bt_procfs_init(&init_net, "bnep", &bnep_sk_list, NULL);
+	if (err < 0) {
+		BT_ERR("Failed to create BNEP proc file");
+		bt_sock_unregister(BTPROTO_BNEP);
+		goto error;
+	}
+
+	BT_INFO("BNEP socket layer initialized");
+
+	return 0;
+
+error:
+	proto_unregister(&bnep_proto);
+	return err;
+}
+
+void __exit bnep_sock_cleanup(void)
+{
+	bt_procfs_cleanup(&init_net, "bnep");
+	bt_sock_unregister(BTPROTO_BNEP);
+	proto_unregister(&bnep_proto);
+}
diff --git a/net/bluetooth/cmtp/Kconfig b/net/bluetooth/cmtp/Kconfig
new file mode 100644
index 000000000..c8337786d
--- /dev/null
+++ b/net/bluetooth/cmtp/Kconfig
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config BT_CMTP
+	tristate "CMTP protocol support"
+	depends on BT_BREDR && ISDN_CAPI
+	help
+	  CMTP (CAPI Message Transport Protocol) is a transport layer
+	  for CAPI messages.  CMTP is required for the Bluetooth Common
+	  ISDN Access Profile.
+
+	  Say Y here to compile CMTP support into the kernel or say M to
+	  compile it as module (cmtp).
+
diff --git a/net/bluetooth/cmtp/Makefile b/net/bluetooth/cmtp/Makefile
new file mode 100644
index 000000000..b2262ca97
--- /dev/null
+++ b/net/bluetooth/cmtp/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the Linux Bluetooth CMTP layer
+#
+
+obj-$(CONFIG_BT_CMTP) += cmtp.o
+
+cmtp-objs := core.o sock.o capi.o
diff --git a/net/bluetooth/cmtp/capi.c b/net/bluetooth/cmtp/capi.c
new file mode 100644
index 000000000..eb4155600
--- /dev/null
+++ b/net/bluetooth/cmtp/capi.c
@@ -0,0 +1,595 @@
+/*
+   CMTP implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2002-2003 Marcel Holtmann <marcel@holtmann.org>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#include <linux/export.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/sched/signal.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/fcntl.h>
+#include <linux/skbuff.h>
+#include <linux/socket.h>
+#include <linux/ioctl.h>
+#include <linux/file.h>
+#include <linux/wait.h>
+#include <linux/kthread.h>
+#include <net/sock.h>
+
+#include <linux/isdn/capilli.h>
+#include <linux/isdn/capicmd.h>
+#include <linux/isdn/capiutil.h>
+
+#include "cmtp.h"
+
+#define CAPI_INTEROPERABILITY		0x20
+
+#define CAPI_INTEROPERABILITY_REQ	CAPICMD(CAPI_INTEROPERABILITY, CAPI_REQ)
+#define CAPI_INTEROPERABILITY_CONF	CAPICMD(CAPI_INTEROPERABILITY, CAPI_CONF)
+#define CAPI_INTEROPERABILITY_IND	CAPICMD(CAPI_INTEROPERABILITY, CAPI_IND)
+#define CAPI_INTEROPERABILITY_RESP	CAPICMD(CAPI_INTEROPERABILITY, CAPI_RESP)
+
+#define CAPI_INTEROPERABILITY_REQ_LEN	(CAPI_MSG_BASELEN + 2)
+#define CAPI_INTEROPERABILITY_CONF_LEN	(CAPI_MSG_BASELEN + 4)
+#define CAPI_INTEROPERABILITY_IND_LEN	(CAPI_MSG_BASELEN + 2)
+#define CAPI_INTEROPERABILITY_RESP_LEN	(CAPI_MSG_BASELEN + 2)
+
+#define CAPI_FUNCTION_REGISTER		0
+#define CAPI_FUNCTION_RELEASE		1
+#define CAPI_FUNCTION_GET_PROFILE	2
+#define CAPI_FUNCTION_GET_MANUFACTURER	3
+#define CAPI_FUNCTION_GET_VERSION	4
+#define CAPI_FUNCTION_GET_SERIAL_NUMBER	5
+#define CAPI_FUNCTION_MANUFACTURER	6
+#define CAPI_FUNCTION_LOOPBACK		7
+
+
+#define CMTP_MSGNUM	1
+#define CMTP_APPLID	2
+#define CMTP_MAPPING	3
+
+static struct cmtp_application *cmtp_application_add(struct cmtp_session *session, __u16 appl)
+{
+	struct cmtp_application *app = kzalloc(sizeof(*app), GFP_KERNEL);
+
+	BT_DBG("session %p application %p appl %d", session, app, appl);
+
+	if (!app)
+		return NULL;
+
+	app->state = BT_OPEN;
+	app->appl = appl;
+
+	list_add_tail(&app->list, &session->applications);
+
+	return app;
+}
+
+static void cmtp_application_del(struct cmtp_session *session, struct cmtp_application *app)
+{
+	BT_DBG("session %p application %p", session, app);
+
+	if (app) {
+		list_del(&app->list);
+		kfree(app);
+	}
+}
+
+static struct cmtp_application *cmtp_application_get(struct cmtp_session *session, int pattern, __u16 value)
+{
+	struct cmtp_application *app;
+
+	list_for_each_entry(app, &session->applications, list) {
+		switch (pattern) {
+		case CMTP_MSGNUM:
+			if (app->msgnum == value)
+				return app;
+			break;
+		case CMTP_APPLID:
+			if (app->appl == value)
+				return app;
+			break;
+		case CMTP_MAPPING:
+			if (app->mapping == value)
+				return app;
+			break;
+		}
+	}
+
+	return NULL;
+}
+
+static int cmtp_msgnum_get(struct cmtp_session *session)
+{
+	session->msgnum++;
+
+	if ((session->msgnum & 0xff) > 200)
+		session->msgnum = CMTP_INITIAL_MSGNUM + 1;
+
+	return session->msgnum;
+}
+
+static void cmtp_send_capimsg(struct cmtp_session *session, struct sk_buff *skb)
+{
+	struct cmtp_scb *scb = (void *) skb->cb;
+
+	BT_DBG("session %p skb %p len %d", session, skb, skb->len);
+
+	scb->id = -1;
+	scb->data = (CAPIMSG_COMMAND(skb->data) == CAPI_DATA_B3);
+
+	skb_queue_tail(&session->transmit, skb);
+
+	wake_up_interruptible(sk_sleep(session->sock->sk));
+}
+
+static void cmtp_send_interopmsg(struct cmtp_session *session,
+					__u8 subcmd, __u16 appl, __u16 msgnum,
+					__u16 function, unsigned char *buf, int len)
+{
+	struct sk_buff *skb;
+	unsigned char *s;
+
+	BT_DBG("session %p subcmd 0x%02x appl %d msgnum %d", session, subcmd, appl, msgnum);
+
+	skb = alloc_skb(CAPI_MSG_BASELEN + 6 + len, GFP_ATOMIC);
+	if (!skb) {
+		BT_ERR("Can't allocate memory for interoperability packet");
+		return;
+	}
+
+	s = skb_put(skb, CAPI_MSG_BASELEN + 6 + len);
+
+	capimsg_setu16(s, 0, CAPI_MSG_BASELEN + 6 + len);
+	capimsg_setu16(s, 2, appl);
+	capimsg_setu8 (s, 4, CAPI_INTEROPERABILITY);
+	capimsg_setu8 (s, 5, subcmd);
+	capimsg_setu16(s, 6, msgnum);
+
+	/* Interoperability selector (Bluetooth Device Management) */
+	capimsg_setu16(s, 8, 0x0001);
+
+	capimsg_setu8 (s, 10, 3 + len);
+	capimsg_setu16(s, 11, function);
+	capimsg_setu8 (s, 13, len);
+
+	if (len > 0)
+		memcpy(s + 14, buf, len);
+
+	cmtp_send_capimsg(session, skb);
+}
+
+static void cmtp_recv_interopmsg(struct cmtp_session *session, struct sk_buff *skb)
+{
+	struct capi_ctr *ctrl = &session->ctrl;
+	struct cmtp_application *application;
+	__u16 appl, msgnum, func, info;
+	__u32 controller;
+
+	BT_DBG("session %p skb %p len %d", session, skb, skb->len);
+
+	switch (CAPIMSG_SUBCOMMAND(skb->data)) {
+	case CAPI_CONF:
+		if (skb->len < CAPI_MSG_BASELEN + 10)
+			break;
+
+		func = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 5);
+		info = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 8);
+
+		switch (func) {
+		case CAPI_FUNCTION_REGISTER:
+			msgnum = CAPIMSG_MSGID(skb->data);
+
+			application = cmtp_application_get(session, CMTP_MSGNUM, msgnum);
+			if (application) {
+				application->state = BT_CONNECTED;
+				application->msgnum = 0;
+				application->mapping = CAPIMSG_APPID(skb->data);
+				wake_up_interruptible(&session->wait);
+			}
+
+			break;
+
+		case CAPI_FUNCTION_RELEASE:
+			appl = CAPIMSG_APPID(skb->data);
+
+			application = cmtp_application_get(session, CMTP_MAPPING, appl);
+			if (application) {
+				application->state = BT_CLOSED;
+				application->msgnum = 0;
+				wake_up_interruptible(&session->wait);
+			}
+
+			break;
+
+		case CAPI_FUNCTION_GET_PROFILE:
+			if (skb->len < CAPI_MSG_BASELEN + 11 + sizeof(capi_profile))
+				break;
+
+			controller = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 11);
+			msgnum = CAPIMSG_MSGID(skb->data);
+
+			if (!info && (msgnum == CMTP_INITIAL_MSGNUM)) {
+				session->ncontroller = controller;
+				wake_up_interruptible(&session->wait);
+				break;
+			}
+
+			if (!info && ctrl) {
+				memcpy(&ctrl->profile,
+					skb->data + CAPI_MSG_BASELEN + 11,
+					sizeof(capi_profile));
+				session->state = BT_CONNECTED;
+				capi_ctr_ready(ctrl);
+			}
+
+			break;
+
+		case CAPI_FUNCTION_GET_MANUFACTURER:
+			if (skb->len < CAPI_MSG_BASELEN + 15)
+				break;
+
+			if (!info && ctrl) {
+				int len = min_t(uint, CAPI_MANUFACTURER_LEN,
+						skb->data[CAPI_MSG_BASELEN + 14]);
+
+				memset(ctrl->manu, 0, CAPI_MANUFACTURER_LEN);
+				strncpy(ctrl->manu,
+					skb->data + CAPI_MSG_BASELEN + 15, len);
+			}
+
+			break;
+
+		case CAPI_FUNCTION_GET_VERSION:
+			if (skb->len < CAPI_MSG_BASELEN + 32)
+				break;
+
+			if (!info && ctrl) {
+				ctrl->version.majorversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 16);
+				ctrl->version.minorversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 20);
+				ctrl->version.majormanuversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 24);
+				ctrl->version.minormanuversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 28);
+			}
+
+			break;
+
+		case CAPI_FUNCTION_GET_SERIAL_NUMBER:
+			if (skb->len < CAPI_MSG_BASELEN + 17)
+				break;
+
+			if (!info && ctrl) {
+				int len = min_t(uint, CAPI_SERIAL_LEN,
+						skb->data[CAPI_MSG_BASELEN + 16]);
+
+				memset(ctrl->serial, 0, CAPI_SERIAL_LEN);
+				strncpy(ctrl->serial,
+					skb->data + CAPI_MSG_BASELEN + 17, len);
+			}
+
+			break;
+		}
+
+		break;
+
+	case CAPI_IND:
+		if (skb->len < CAPI_MSG_BASELEN + 6)
+			break;
+
+		func = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 3);
+
+		if (func == CAPI_FUNCTION_LOOPBACK) {
+			int len = min_t(uint, skb->len - CAPI_MSG_BASELEN - 6,
+						skb->data[CAPI_MSG_BASELEN + 5]);
+			appl = CAPIMSG_APPID(skb->data);
+			msgnum = CAPIMSG_MSGID(skb->data);
+			cmtp_send_interopmsg(session, CAPI_RESP, appl, msgnum, func,
+						skb->data + CAPI_MSG_BASELEN + 6, len);
+		}
+
+		break;
+	}
+
+	kfree_skb(skb);
+}
+
+void cmtp_recv_capimsg(struct cmtp_session *session, struct sk_buff *skb)
+{
+	struct capi_ctr *ctrl = &session->ctrl;
+	struct cmtp_application *application;
+	__u16 appl;
+	__u32 contr;
+
+	BT_DBG("session %p skb %p len %d", session, skb, skb->len);
+
+	if (skb->len < CAPI_MSG_BASELEN)
+		return;
+
+	if (CAPIMSG_COMMAND(skb->data) == CAPI_INTEROPERABILITY) {
+		cmtp_recv_interopmsg(session, skb);
+		return;
+	}
+
+	if (session->flags & BIT(CMTP_LOOPBACK)) {
+		kfree_skb(skb);
+		return;
+	}
+
+	appl = CAPIMSG_APPID(skb->data);
+	contr = CAPIMSG_CONTROL(skb->data);
+
+	application = cmtp_application_get(session, CMTP_MAPPING, appl);
+	if (application) {
+		appl = application->appl;
+		CAPIMSG_SETAPPID(skb->data, appl);
+	} else {
+		BT_ERR("Can't find application with id %d", appl);
+		kfree_skb(skb);
+		return;
+	}
+
+	if ((contr & 0x7f) == 0x01) {
+		contr = (contr & 0xffffff80) | session->num;
+		CAPIMSG_SETCONTROL(skb->data, contr);
+	}
+
+	capi_ctr_handle_message(ctrl, appl, skb);
+}
+
+static int cmtp_load_firmware(struct capi_ctr *ctrl, capiloaddata *data)
+{
+	BT_DBG("ctrl %p data %p", ctrl, data);
+
+	return 0;
+}
+
+static void cmtp_reset_ctr(struct capi_ctr *ctrl)
+{
+	struct cmtp_session *session = ctrl->driverdata;
+
+	BT_DBG("ctrl %p", ctrl);
+
+	capi_ctr_down(ctrl);
+
+	atomic_inc(&session->terminate);
+	wake_up_process(session->task);
+}
+
+static void cmtp_register_appl(struct capi_ctr *ctrl, __u16 appl, capi_register_params *rp)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	struct cmtp_session *session = ctrl->driverdata;
+	struct cmtp_application *application;
+	unsigned long timeo = CMTP_INTEROP_TIMEOUT;
+	unsigned char buf[8];
+	int err = 0, nconn, want = rp->level3cnt;
+
+	BT_DBG("ctrl %p appl %d level3cnt %d datablkcnt %d datablklen %d",
+		ctrl, appl, rp->level3cnt, rp->datablkcnt, rp->datablklen);
+
+	application = cmtp_application_add(session, appl);
+	if (!application) {
+		BT_ERR("Can't allocate memory for new application");
+		return;
+	}
+
+	if (want < 0)
+		nconn = ctrl->profile.nbchannel * -want;
+	else
+		nconn = want;
+
+	if (nconn == 0)
+		nconn = ctrl->profile.nbchannel;
+
+	capimsg_setu16(buf, 0, nconn);
+	capimsg_setu16(buf, 2, rp->datablkcnt);
+	capimsg_setu16(buf, 4, rp->datablklen);
+
+	application->state = BT_CONFIG;
+	application->msgnum = cmtp_msgnum_get(session);
+
+	cmtp_send_interopmsg(session, CAPI_REQ, 0x0000, application->msgnum,
+				CAPI_FUNCTION_REGISTER, buf, 6);
+
+	add_wait_queue(&session->wait, &wait);
+	while (1) {
+		set_current_state(TASK_INTERRUPTIBLE);
+
+		if (!timeo) {
+			err = -EAGAIN;
+			break;
+		}
+
+		if (application->state == BT_CLOSED) {
+			err = -application->err;
+			break;
+		}
+
+		if (application->state == BT_CONNECTED)
+			break;
+
+		if (signal_pending(current)) {
+			err = -EINTR;
+			break;
+		}
+
+		timeo = schedule_timeout(timeo);
+	}
+	set_current_state(TASK_RUNNING);
+	remove_wait_queue(&session->wait, &wait);
+
+	if (err) {
+		cmtp_application_del(session, application);
+		return;
+	}
+}
+
+static void cmtp_release_appl(struct capi_ctr *ctrl, __u16 appl)
+{
+	struct cmtp_session *session = ctrl->driverdata;
+	struct cmtp_application *application;
+
+	BT_DBG("ctrl %p appl %d", ctrl, appl);
+
+	application = cmtp_application_get(session, CMTP_APPLID, appl);
+	if (!application) {
+		BT_ERR("Can't find application");
+		return;
+	}
+
+	application->msgnum = cmtp_msgnum_get(session);
+
+	cmtp_send_interopmsg(session, CAPI_REQ, application->mapping, application->msgnum,
+				CAPI_FUNCTION_RELEASE, NULL, 0);
+
+	wait_event_interruptible_timeout(session->wait,
+			(application->state == BT_CLOSED), CMTP_INTEROP_TIMEOUT);
+
+	cmtp_application_del(session, application);
+}
+
+static u16 cmtp_send_message(struct capi_ctr *ctrl, struct sk_buff *skb)
+{
+	struct cmtp_session *session = ctrl->driverdata;
+	struct cmtp_application *application;
+	__u16 appl;
+	__u32 contr;
+
+	BT_DBG("ctrl %p skb %p", ctrl, skb);
+
+	appl = CAPIMSG_APPID(skb->data);
+	contr = CAPIMSG_CONTROL(skb->data);
+
+	application = cmtp_application_get(session, CMTP_APPLID, appl);
+	if ((!application) || (application->state != BT_CONNECTED)) {
+		BT_ERR("Can't find application with id %d", appl);
+		return CAPI_ILLAPPNR;
+	}
+
+	CAPIMSG_SETAPPID(skb->data, application->mapping);
+
+	if ((contr & 0x7f) == session->num) {
+		contr = (contr & 0xffffff80) | 0x01;
+		CAPIMSG_SETCONTROL(skb->data, contr);
+	}
+
+	cmtp_send_capimsg(session, skb);
+
+	return CAPI_NOERROR;
+}
+
+static char *cmtp_procinfo(struct capi_ctr *ctrl)
+{
+	return "CAPI Message Transport Protocol";
+}
+
+static int cmtp_proc_show(struct seq_file *m, void *v)
+{
+	struct capi_ctr *ctrl = m->private;
+	struct cmtp_session *session = ctrl->driverdata;
+	struct cmtp_application *app;
+
+	seq_printf(m, "%s\n\n", cmtp_procinfo(ctrl));
+	seq_printf(m, "addr %s\n", session->name);
+	seq_printf(m, "ctrl %d\n", session->num);
+
+	list_for_each_entry(app, &session->applications, list) {
+		seq_printf(m, "appl %d -> %d\n", app->appl, app->mapping);
+	}
+
+	return 0;
+}
+
+int cmtp_attach_device(struct cmtp_session *session)
+{
+	unsigned char buf[4];
+	long ret;
+
+	BT_DBG("session %p", session);
+
+	capimsg_setu32(buf, 0, 0);
+
+	cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, CMTP_INITIAL_MSGNUM,
+				CAPI_FUNCTION_GET_PROFILE, buf, 4);
+
+	ret = wait_event_interruptible_timeout(session->wait,
+			session->ncontroller, CMTP_INTEROP_TIMEOUT);
+
+	BT_INFO("Found %d CAPI controller(s) on device %s", session->ncontroller, session->name);
+
+	if (!ret)
+		return -ETIMEDOUT;
+
+	if (!session->ncontroller)
+		return -ENODEV;
+
+	if (session->ncontroller > 1)
+		BT_INFO("Setting up only CAPI controller 1");
+
+	session->ctrl.owner      = THIS_MODULE;
+	session->ctrl.driverdata = session;
+	strcpy(session->ctrl.name, session->name);
+
+	session->ctrl.driver_name   = "cmtp";
+	session->ctrl.load_firmware = cmtp_load_firmware;
+	session->ctrl.reset_ctr     = cmtp_reset_ctr;
+	session->ctrl.register_appl = cmtp_register_appl;
+	session->ctrl.release_appl  = cmtp_release_appl;
+	session->ctrl.send_message  = cmtp_send_message;
+
+	session->ctrl.procinfo      = cmtp_procinfo;
+	session->ctrl.proc_show     = cmtp_proc_show;
+
+	if (attach_capi_ctr(&session->ctrl) < 0) {
+		BT_ERR("Can't attach new controller");
+		return -EBUSY;
+	}
+
+	session->num = session->ctrl.cnr;
+
+	BT_DBG("session %p num %d", session, session->num);
+
+	capimsg_setu32(buf, 0, 1);
+
+	cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
+				CAPI_FUNCTION_GET_MANUFACTURER, buf, 4);
+
+	cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
+				CAPI_FUNCTION_GET_VERSION, buf, 4);
+
+	cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
+				CAPI_FUNCTION_GET_SERIAL_NUMBER, buf, 4);
+
+	cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
+				CAPI_FUNCTION_GET_PROFILE, buf, 4);
+
+	return 0;
+}
+
+void cmtp_detach_device(struct cmtp_session *session)
+{
+	BT_DBG("session %p", session);
+
+	detach_capi_ctr(&session->ctrl);
+}
diff --git a/net/bluetooth/cmtp/cmtp.h b/net/bluetooth/cmtp/cmtp.h
new file mode 100644
index 000000000..f6b9dc4e4
--- /dev/null
+++ b/net/bluetooth/cmtp/cmtp.h
@@ -0,0 +1,129 @@
+/*
+   CMTP implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2002-2003 Marcel Holtmann <marcel@holtmann.org>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#ifndef __CMTP_H
+#define __CMTP_H
+
+#include <linux/types.h>
+#include <net/bluetooth/bluetooth.h>
+
+#define BTNAMSIZ 21
+
+/* CMTP ioctl defines */
+#define CMTPCONNADD	_IOW('C', 200, int)
+#define CMTPCONNDEL	_IOW('C', 201, int)
+#define CMTPGETCONNLIST	_IOR('C', 210, int)
+#define CMTPGETCONNINFO	_IOR('C', 211, int)
+
+#define CMTP_LOOPBACK	0
+
+struct cmtp_connadd_req {
+	int   sock;	/* Connected socket */
+	__u32 flags;
+};
+
+struct cmtp_conndel_req {
+	bdaddr_t bdaddr;
+	__u32    flags;
+};
+
+struct cmtp_conninfo {
+	bdaddr_t bdaddr;
+	__u32    flags;
+	__u16    state;
+	int      num;
+};
+
+struct cmtp_connlist_req {
+	__u32  cnum;
+	struct cmtp_conninfo __user *ci;
+};
+
+int cmtp_add_connection(struct cmtp_connadd_req *req, struct socket *sock);
+int cmtp_del_connection(struct cmtp_conndel_req *req);
+int cmtp_get_connlist(struct cmtp_connlist_req *req);
+int cmtp_get_conninfo(struct cmtp_conninfo *ci);
+
+/* CMTP session defines */
+#define CMTP_INTEROP_TIMEOUT	(HZ * 5)
+#define CMTP_INITIAL_MSGNUM	0xff00
+
+struct cmtp_session {
+	struct list_head list;
+
+	struct socket *sock;
+
+	bdaddr_t bdaddr;
+
+	unsigned long state;
+	unsigned long flags;
+
+	uint mtu;
+
+	char name[BTNAMSIZ];
+
+	atomic_t terminate;
+	struct task_struct *task;
+
+	wait_queue_head_t wait;
+
+	int ncontroller;
+	int num;
+	struct capi_ctr ctrl;
+
+	struct list_head applications;
+
+	unsigned long blockids;
+	int msgnum;
+
+	struct sk_buff_head transmit;
+
+	struct sk_buff *reassembly[16];
+};
+
+struct cmtp_application {
+	struct list_head list;
+
+	unsigned long state;
+	int err;
+
+	__u16 appl;
+	__u16 mapping;
+
+	__u16 msgnum;
+};
+
+struct cmtp_scb {
+	int id;
+	int data;
+};
+
+int  cmtp_attach_device(struct cmtp_session *session);
+void cmtp_detach_device(struct cmtp_session *session);
+
+void cmtp_recv_capimsg(struct cmtp_session *session, struct sk_buff *skb);
+
+/* CMTP init defines */
+int cmtp_init_sockets(void);
+void cmtp_cleanup_sockets(void);
+
+#endif /* __CMTP_H */
diff --git a/net/bluetooth/cmtp/core.c b/net/bluetooth/cmtp/core.c
new file mode 100644
index 000000000..83eb84e8e
--- /dev/null
+++ b/net/bluetooth/cmtp/core.c
@@ -0,0 +1,519 @@
+/*
+   CMTP implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2002-2003 Marcel Holtmann <marcel@holtmann.org>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#include <linux/module.h>
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/fcntl.h>
+#include <linux/freezer.h>
+#include <linux/skbuff.h>
+#include <linux/socket.h>
+#include <linux/ioctl.h>
+#include <linux/file.h>
+#include <linux/init.h>
+#include <linux/kthread.h>
+#include <net/sock.h>
+
+#include <linux/isdn/capilli.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/l2cap.h>
+
+#include "cmtp.h"
+
+#define VERSION "1.0"
+
+static DECLARE_RWSEM(cmtp_session_sem);
+static LIST_HEAD(cmtp_session_list);
+
+static struct cmtp_session *__cmtp_get_session(bdaddr_t *bdaddr)
+{
+	struct cmtp_session *session;
+
+	BT_DBG("");
+
+	list_for_each_entry(session, &cmtp_session_list, list)
+		if (!bacmp(bdaddr, &session->bdaddr))
+			return session;
+
+	return NULL;
+}
+
+static void __cmtp_link_session(struct cmtp_session *session)
+{
+	list_add(&session->list, &cmtp_session_list);
+}
+
+static void __cmtp_unlink_session(struct cmtp_session *session)
+{
+	list_del(&session->list);
+}
+
+static void __cmtp_copy_session(struct cmtp_session *session, struct cmtp_conninfo *ci)
+{
+	u32 valid_flags = BIT(CMTP_LOOPBACK);
+	memset(ci, 0, sizeof(*ci));
+	bacpy(&ci->bdaddr, &session->bdaddr);
+
+	ci->flags = session->flags & valid_flags;
+	ci->state = session->state;
+
+	ci->num = session->num;
+}
+
+
+static inline int cmtp_alloc_block_id(struct cmtp_session *session)
+{
+	int i, id = -1;
+
+	for (i = 0; i < 16; i++)
+		if (!test_and_set_bit(i, &session->blockids)) {
+			id = i;
+			break;
+		}
+
+	return id;
+}
+
+static inline void cmtp_free_block_id(struct cmtp_session *session, int id)
+{
+	clear_bit(id, &session->blockids);
+}
+
+static inline void cmtp_add_msgpart(struct cmtp_session *session, int id, const unsigned char *buf, int count)
+{
+	struct sk_buff *skb = session->reassembly[id], *nskb;
+	int size;
+
+	BT_DBG("session %p buf %p count %d", session, buf, count);
+
+	size = (skb) ? skb->len + count : count;
+
+	nskb = alloc_skb(size, GFP_ATOMIC);
+	if (!nskb) {
+		BT_ERR("Can't allocate memory for CAPI message");
+		return;
+	}
+
+	if (skb && (skb->len > 0))
+		skb_copy_from_linear_data(skb, skb_put(nskb, skb->len), skb->len);
+
+	skb_put_data(nskb, buf, count);
+
+	session->reassembly[id] = nskb;
+
+	kfree_skb(skb);
+}
+
+static inline int cmtp_recv_frame(struct cmtp_session *session, struct sk_buff *skb)
+{
+	__u8 hdr, hdrlen, id;
+	__u16 len;
+
+	BT_DBG("session %p skb %p len %d", session, skb, skb->len);
+
+	while (skb->len > 0) {
+		hdr = skb->data[0];
+
+		switch (hdr & 0xc0) {
+		case 0x40:
+			hdrlen = 2;
+			len = skb->data[1];
+			break;
+		case 0x80:
+			hdrlen = 3;
+			len = skb->data[1] | (skb->data[2] << 8);
+			break;
+		default:
+			hdrlen = 1;
+			len = 0;
+			break;
+		}
+
+		id = (hdr & 0x3c) >> 2;
+
+		BT_DBG("hdr 0x%02x hdrlen %d len %d id %d", hdr, hdrlen, len, id);
+
+		if (hdrlen + len > skb->len) {
+			BT_ERR("Wrong size or header information in CMTP frame");
+			break;
+		}
+
+		if (len == 0) {
+			skb_pull(skb, hdrlen);
+			continue;
+		}
+
+		switch (hdr & 0x03) {
+		case 0x00:
+			cmtp_add_msgpart(session, id, skb->data + hdrlen, len);
+			cmtp_recv_capimsg(session, session->reassembly[id]);
+			session->reassembly[id] = NULL;
+			break;
+		case 0x01:
+			cmtp_add_msgpart(session, id, skb->data + hdrlen, len);
+			break;
+		default:
+			kfree_skb(session->reassembly[id]);
+			session->reassembly[id] = NULL;
+			break;
+		}
+
+		skb_pull(skb, hdrlen + len);
+	}
+
+	kfree_skb(skb);
+	return 0;
+}
+
+static int cmtp_send_frame(struct cmtp_session *session, unsigned char *data, int len)
+{
+	struct socket *sock = session->sock;
+	struct kvec iv = { data, len };
+	struct msghdr msg;
+
+	BT_DBG("session %p data %p len %d", session, data, len);
+
+	if (!len)
+		return 0;
+
+	memset(&msg, 0, sizeof(msg));
+
+	return kernel_sendmsg(sock, &msg, &iv, 1, len);
+}
+
+static void cmtp_process_transmit(struct cmtp_session *session)
+{
+	struct sk_buff *skb, *nskb;
+	unsigned char *hdr;
+	unsigned int size, tail;
+
+	BT_DBG("session %p", session);
+
+	nskb = alloc_skb(session->mtu, GFP_ATOMIC);
+	if (!nskb) {
+		BT_ERR("Can't allocate memory for new frame");
+		return;
+	}
+
+	while ((skb = skb_dequeue(&session->transmit))) {
+		struct cmtp_scb *scb = (void *) skb->cb;
+
+		tail = session->mtu - nskb->len;
+		if (tail < 5) {
+			cmtp_send_frame(session, nskb->data, nskb->len);
+			skb_trim(nskb, 0);
+			tail = session->mtu;
+		}
+
+		size = min_t(uint, ((tail < 258) ? (tail - 2) : (tail - 3)), skb->len);
+
+		if (scb->id < 0) {
+			scb->id = cmtp_alloc_block_id(session);
+			if (scb->id < 0) {
+				skb_queue_head(&session->transmit, skb);
+				break;
+			}
+		}
+
+		if (size < 256) {
+			hdr = skb_put(nskb, 2);
+			hdr[0] = 0x40
+				| ((scb->id << 2) & 0x3c)
+				| ((skb->len == size) ? 0x00 : 0x01);
+			hdr[1] = size;
+		} else {
+			hdr = skb_put(nskb, 3);
+			hdr[0] = 0x80
+				| ((scb->id << 2) & 0x3c)
+				| ((skb->len == size) ? 0x00 : 0x01);
+			hdr[1] = size & 0xff;
+			hdr[2] = size >> 8;
+		}
+
+		skb_copy_from_linear_data(skb, skb_put(nskb, size), size);
+		skb_pull(skb, size);
+
+		if (skb->len > 0) {
+			skb_queue_head(&session->transmit, skb);
+		} else {
+			cmtp_free_block_id(session, scb->id);
+			if (scb->data) {
+				cmtp_send_frame(session, nskb->data, nskb->len);
+				skb_trim(nskb, 0);
+			}
+			kfree_skb(skb);
+		}
+	}
+
+	cmtp_send_frame(session, nskb->data, nskb->len);
+
+	kfree_skb(nskb);
+}
+
+static int cmtp_session(void *arg)
+{
+	struct cmtp_session *session = arg;
+	struct sock *sk = session->sock->sk;
+	struct sk_buff *skb;
+	DEFINE_WAIT_FUNC(wait, woken_wake_function);
+
+	BT_DBG("session %p", session);
+
+	set_user_nice(current, -15);
+
+	add_wait_queue(sk_sleep(sk), &wait);
+	while (1) {
+		if (atomic_read(&session->terminate))
+			break;
+		if (sk->sk_state != BT_CONNECTED)
+			break;
+
+		while ((skb = skb_dequeue(&sk->sk_receive_queue))) {
+			skb_orphan(skb);
+			if (!skb_linearize(skb))
+				cmtp_recv_frame(session, skb);
+			else
+				kfree_skb(skb);
+		}
+
+		cmtp_process_transmit(session);
+
+		/*
+		 * wait_woken() performs the necessary memory barriers
+		 * for us; see the header comment for this primitive.
+		 */
+		wait_woken(&wait, TASK_INTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
+	}
+	remove_wait_queue(sk_sleep(sk), &wait);
+
+	down_write(&cmtp_session_sem);
+
+	if (!(session->flags & BIT(CMTP_LOOPBACK)))
+		cmtp_detach_device(session);
+
+	fput(session->sock->file);
+
+	__cmtp_unlink_session(session);
+
+	up_write(&cmtp_session_sem);
+
+	kfree(session);
+	module_put_and_exit(0);
+	return 0;
+}
+
+int cmtp_add_connection(struct cmtp_connadd_req *req, struct socket *sock)
+{
+	u32 valid_flags = BIT(CMTP_LOOPBACK);
+	struct cmtp_session *session, *s;
+	int i, err;
+
+	BT_DBG("");
+
+	if (!l2cap_is_socket(sock))
+		return -EBADFD;
+
+	if (req->flags & ~valid_flags)
+		return -EINVAL;
+
+	session = kzalloc(sizeof(struct cmtp_session), GFP_KERNEL);
+	if (!session)
+		return -ENOMEM;
+
+	down_write(&cmtp_session_sem);
+
+	s = __cmtp_get_session(&l2cap_pi(sock->sk)->chan->dst);
+	if (s && s->state == BT_CONNECTED) {
+		err = -EEXIST;
+		goto failed;
+	}
+
+	bacpy(&session->bdaddr, &l2cap_pi(sock->sk)->chan->dst);
+
+	session->mtu = min_t(uint, l2cap_pi(sock->sk)->chan->omtu,
+					l2cap_pi(sock->sk)->chan->imtu);
+
+	BT_DBG("mtu %d", session->mtu);
+
+	sprintf(session->name, "%pMR", &session->bdaddr);
+
+	session->sock  = sock;
+	session->state = BT_CONFIG;
+
+	init_waitqueue_head(&session->wait);
+
+	session->msgnum = CMTP_INITIAL_MSGNUM;
+
+	INIT_LIST_HEAD(&session->applications);
+
+	skb_queue_head_init(&session->transmit);
+
+	for (i = 0; i < 16; i++)
+		session->reassembly[i] = NULL;
+
+	session->flags = req->flags;
+
+	__cmtp_link_session(session);
+
+	__module_get(THIS_MODULE);
+	session->task = kthread_run(cmtp_session, session, "kcmtpd_ctr_%d",
+								session->num);
+	if (IS_ERR(session->task)) {
+		module_put(THIS_MODULE);
+		err = PTR_ERR(session->task);
+		goto unlink;
+	}
+
+	if (!(session->flags & BIT(CMTP_LOOPBACK))) {
+		err = cmtp_attach_device(session);
+		if (err < 0) {
+			/* Caller will call fput in case of failure, and so
+			 * will cmtp_session kthread.
+			 */
+			get_file(session->sock->file);
+
+			atomic_inc(&session->terminate);
+			wake_up_interruptible(sk_sleep(session->sock->sk));
+			up_write(&cmtp_session_sem);
+			return err;
+		}
+	}
+
+	up_write(&cmtp_session_sem);
+	return 0;
+
+unlink:
+	__cmtp_unlink_session(session);
+
+failed:
+	up_write(&cmtp_session_sem);
+	kfree(session);
+	return err;
+}
+
+int cmtp_del_connection(struct cmtp_conndel_req *req)
+{
+	u32 valid_flags = 0;
+	struct cmtp_session *session;
+	int err = 0;
+
+	BT_DBG("");
+
+	if (req->flags & ~valid_flags)
+		return -EINVAL;
+
+	down_read(&cmtp_session_sem);
+
+	session = __cmtp_get_session(&req->bdaddr);
+	if (session) {
+		/* Flush the transmit queue */
+		skb_queue_purge(&session->transmit);
+
+		/* Stop session thread */
+		atomic_inc(&session->terminate);
+
+		/*
+		 * See the comment preceding the call to wait_woken()
+		 * in cmtp_session().
+		 */
+		wake_up_interruptible(sk_sleep(session->sock->sk));
+	} else
+		err = -ENOENT;
+
+	up_read(&cmtp_session_sem);
+	return err;
+}
+
+int cmtp_get_connlist(struct cmtp_connlist_req *req)
+{
+	struct cmtp_session *session;
+	int err = 0, n = 0;
+
+	BT_DBG("");
+
+	down_read(&cmtp_session_sem);
+
+	list_for_each_entry(session, &cmtp_session_list, list) {
+		struct cmtp_conninfo ci;
+
+		__cmtp_copy_session(session, &ci);
+
+		if (copy_to_user(req->ci, &ci, sizeof(ci))) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (++n >= req->cnum)
+			break;
+
+		req->ci++;
+	}
+	req->cnum = n;
+
+	up_read(&cmtp_session_sem);
+	return err;
+}
+
+int cmtp_get_conninfo(struct cmtp_conninfo *ci)
+{
+	struct cmtp_session *session;
+	int err = 0;
+
+	down_read(&cmtp_session_sem);
+
+	session = __cmtp_get_session(&ci->bdaddr);
+	if (session)
+		__cmtp_copy_session(session, ci);
+	else
+		err = -ENOENT;
+
+	up_read(&cmtp_session_sem);
+	return err;
+}
+
+
+static int __init cmtp_init(void)
+{
+	BT_INFO("CMTP (CAPI Emulation) ver %s", VERSION);
+
+	return cmtp_init_sockets();
+}
+
+static void __exit cmtp_exit(void)
+{
+	cmtp_cleanup_sockets();
+}
+
+module_init(cmtp_init);
+module_exit(cmtp_exit);
+
+MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
+MODULE_DESCRIPTION("Bluetooth CMTP ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("bt-proto-5");
diff --git a/net/bluetooth/cmtp/sock.c b/net/bluetooth/cmtp/sock.c
new file mode 100644
index 000000000..96d49d9fa
--- /dev/null
+++ b/net/bluetooth/cmtp/sock.c
@@ -0,0 +1,271 @@
+/*
+   CMTP implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2002-2003 Marcel Holtmann <marcel@holtmann.org>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#include <linux/export.h>
+
+#include <linux/types.h>
+#include <linux/capability.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/poll.h>
+#include <linux/fcntl.h>
+#include <linux/skbuff.h>
+#include <linux/socket.h>
+#include <linux/ioctl.h>
+#include <linux/file.h>
+#include <linux/compat.h>
+#include <linux/gfp.h>
+#include <linux/uaccess.h>
+#include <net/sock.h>
+
+#include <linux/isdn/capilli.h>
+
+
+#include "cmtp.h"
+
+static struct bt_sock_list cmtp_sk_list = {
+	.lock = __RW_LOCK_UNLOCKED(cmtp_sk_list.lock)
+};
+
+static int cmtp_sock_release(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+
+	BT_DBG("sock %p sk %p", sock, sk);
+
+	if (!sk)
+		return 0;
+
+	bt_sock_unlink(&cmtp_sk_list, sk);
+
+	sock_orphan(sk);
+	sock_put(sk);
+
+	return 0;
+}
+
+static int do_cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp)
+{
+	struct cmtp_connadd_req ca;
+	struct cmtp_conndel_req cd;
+	struct cmtp_connlist_req cl;
+	struct cmtp_conninfo ci;
+	struct socket *nsock;
+	int err;
+
+	BT_DBG("cmd %x arg %p", cmd, argp);
+
+	switch (cmd) {
+	case CMTPCONNADD:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+
+		if (copy_from_user(&ca, argp, sizeof(ca)))
+			return -EFAULT;
+
+		nsock = sockfd_lookup(ca.sock, &err);
+		if (!nsock)
+			return err;
+
+		if (nsock->sk->sk_state != BT_CONNECTED) {
+			sockfd_put(nsock);
+			return -EBADFD;
+		}
+
+		err = cmtp_add_connection(&ca, nsock);
+		if (!err) {
+			if (copy_to_user(argp, &ca, sizeof(ca)))
+				err = -EFAULT;
+		} else
+			sockfd_put(nsock);
+
+		return err;
+
+	case CMTPCONNDEL:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+
+		if (copy_from_user(&cd, argp, sizeof(cd)))
+			return -EFAULT;
+
+		return cmtp_del_connection(&cd);
+
+	case CMTPGETCONNLIST:
+		if (copy_from_user(&cl, argp, sizeof(cl)))
+			return -EFAULT;
+
+		if (cl.cnum <= 0)
+			return -EINVAL;
+
+		err = cmtp_get_connlist(&cl);
+		if (!err && copy_to_user(argp, &cl, sizeof(cl)))
+			return -EFAULT;
+
+		return err;
+
+	case CMTPGETCONNINFO:
+		if (copy_from_user(&ci, argp, sizeof(ci)))
+			return -EFAULT;
+
+		err = cmtp_get_conninfo(&ci);
+		if (!err && copy_to_user(argp, &ci, sizeof(ci)))
+			return -EFAULT;
+
+		return err;
+	}
+
+	return -EINVAL;
+}
+
+static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+	return do_cmtp_sock_ioctl(sock, cmd, (void __user *)arg);
+}
+
+#ifdef CONFIG_COMPAT
+static int cmtp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+	void __user *argp = compat_ptr(arg);
+	if (cmd == CMTPGETCONNLIST) {
+		struct cmtp_connlist_req cl;
+		u32 __user *p = argp;
+		u32 uci;
+		int err;
+
+		if (get_user(cl.cnum, p) || get_user(uci, p + 1))
+			return -EFAULT;
+
+		cl.ci = compat_ptr(uci);
+
+		if (cl.cnum <= 0)
+			return -EINVAL;
+
+		err = cmtp_get_connlist(&cl);
+
+		if (!err && put_user(cl.cnum, p))
+			err = -EFAULT;
+
+		return err;
+	}
+
+	return do_cmtp_sock_ioctl(sock, cmd, argp);
+}
+#endif
+
+static const struct proto_ops cmtp_sock_ops = {
+	.family		= PF_BLUETOOTH,
+	.owner		= THIS_MODULE,
+	.release	= cmtp_sock_release,
+	.ioctl		= cmtp_sock_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= cmtp_sock_compat_ioctl,
+#endif
+	.bind		= sock_no_bind,
+	.getname	= sock_no_getname,
+	.sendmsg	= sock_no_sendmsg,
+	.recvmsg	= sock_no_recvmsg,
+	.listen		= sock_no_listen,
+	.shutdown	= sock_no_shutdown,
+	.connect	= sock_no_connect,
+	.socketpair	= sock_no_socketpair,
+	.accept		= sock_no_accept,
+	.mmap		= sock_no_mmap
+};
+
+static struct proto cmtp_proto = {
+	.name		= "CMTP",
+	.owner		= THIS_MODULE,
+	.obj_size	= sizeof(struct bt_sock)
+};
+
+static int cmtp_sock_create(struct net *net, struct socket *sock, int protocol,
+			    int kern)
+{
+	struct sock *sk;
+
+	BT_DBG("sock %p", sock);
+
+	if (sock->type != SOCK_RAW)
+		return -ESOCKTNOSUPPORT;
+
+	sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &cmtp_proto, kern);
+	if (!sk)
+		return -ENOMEM;
+
+	sock_init_data(sock, sk);
+
+	sock->ops = &cmtp_sock_ops;
+
+	sock->state = SS_UNCONNECTED;
+
+	sock_reset_flag(sk, SOCK_ZAPPED);
+
+	sk->sk_protocol = protocol;
+	sk->sk_state    = BT_OPEN;
+
+	bt_sock_link(&cmtp_sk_list, sk);
+
+	return 0;
+}
+
+static const struct net_proto_family cmtp_sock_family_ops = {
+	.family	= PF_BLUETOOTH,
+	.owner	= THIS_MODULE,
+	.create	= cmtp_sock_create
+};
+
+int cmtp_init_sockets(void)
+{
+	int err;
+
+	err = proto_register(&cmtp_proto, 0);
+	if (err < 0)
+		return err;
+
+	err = bt_sock_register(BTPROTO_CMTP, &cmtp_sock_family_ops);
+	if (err < 0) {
+		BT_ERR("Can't register CMTP socket");
+		goto error;
+	}
+
+	err = bt_procfs_init(&init_net, "cmtp", &cmtp_sk_list, NULL);
+	if (err < 0) {
+		BT_ERR("Failed to create CMTP proc file");
+		bt_sock_unregister(BTPROTO_HIDP);
+		goto error;
+	}
+
+	BT_INFO("CMTP socket layer initialized");
+
+	return 0;
+
+error:
+	proto_unregister(&cmtp_proto);
+	return err;
+}
+
+void cmtp_cleanup_sockets(void)
+{
+	bt_procfs_cleanup(&init_net, "cmtp");
+	bt_sock_unregister(BTPROTO_CMTP);
+	proto_unregister(&cmtp_proto);
+}
diff --git a/net/bluetooth/ecdh_helper.c b/net/bluetooth/ecdh_helper.c
new file mode 100644
index 000000000..3226fe02e
--- /dev/null
+++ b/net/bluetooth/ecdh_helper.c
@@ -0,0 +1,230 @@
+/*
+ * ECDH helper functions - KPP wrappings
+ *
+ * Copyright (C) 2017 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+ * CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+ * COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+ * SOFTWARE IS DISCLAIMED.
+ */
+#include "ecdh_helper.h"
+
+#include <linux/scatterlist.h>
+#include <crypto/ecdh.h>
+
+struct ecdh_completion {
+	struct completion completion;
+	int err;
+};
+
+static void ecdh_complete(struct crypto_async_request *req, int err)
+{
+	struct ecdh_completion *res = req->data;
+
+	if (err == -EINPROGRESS)
+		return;
+
+	res->err = err;
+	complete(&res->completion);
+}
+
+static inline void swap_digits(u64 *in, u64 *out, unsigned int ndigits)
+{
+	int i;
+
+	for (i = 0; i < ndigits; i++)
+		out[i] = __swab64(in[ndigits - 1 - i]);
+}
+
+/* compute_ecdh_secret() - function assumes that the private key was
+ *                         already set.
+ * @tfm:          KPP tfm handle allocated with crypto_alloc_kpp().
+ * @public_key:   pair's ecc public key.
+ * secret:        memory where the ecdh computed shared secret will be saved.
+ *
+ * Return: zero on success; error code in case of error.
+ */
+int compute_ecdh_secret(struct crypto_kpp *tfm, const u8 public_key[64],
+			u8 secret[32])
+{
+	struct kpp_request *req;
+	u8 *tmp;
+	struct ecdh_completion result;
+	struct scatterlist src, dst;
+	int err;
+
+	tmp = kmalloc(64, GFP_KERNEL);
+	if (!tmp)
+		return -ENOMEM;
+
+	req = kpp_request_alloc(tfm, GFP_KERNEL);
+	if (!req) {
+		err = -ENOMEM;
+		goto free_tmp;
+	}
+
+	init_completion(&result.completion);
+
+	swap_digits((u64 *)public_key, (u64 *)tmp, 4); /* x */
+	swap_digits((u64 *)&public_key[32], (u64 *)&tmp[32], 4); /* y */
+
+	sg_init_one(&src, tmp, 64);
+	sg_init_one(&dst, secret, 32);
+	kpp_request_set_input(req, &src, 64);
+	kpp_request_set_output(req, &dst, 32);
+	kpp_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
+				 ecdh_complete, &result);
+	err = crypto_kpp_compute_shared_secret(req);
+	if (err == -EINPROGRESS) {
+		wait_for_completion(&result.completion);
+		err = result.err;
+	}
+	if (err < 0) {
+		pr_err("alg: ecdh: compute shared secret failed. err %d\n",
+		       err);
+		goto free_all;
+	}
+
+	swap_digits((u64 *)secret, (u64 *)tmp, 4);
+	memcpy(secret, tmp, 32);
+
+free_all:
+	kpp_request_free(req);
+free_tmp:
+	kfree_sensitive(tmp);
+	return err;
+}
+
+/* set_ecdh_privkey() - set or generate ecc private key.
+ *
+ * Function generates an ecc private key in the crypto subsystem when receiving
+ * a NULL private key or sets the received key when not NULL.
+ *
+ * @tfm:           KPP tfm handle allocated with crypto_alloc_kpp().
+ * @private_key:   user's ecc private key. When not NULL, the key is expected
+ *                 in little endian format.
+ *
+ * Return: zero on success; error code in case of error.
+ */
+int set_ecdh_privkey(struct crypto_kpp *tfm, const u8 private_key[32])
+{
+	u8 *buf, *tmp = NULL;
+	unsigned int buf_len;
+	int err;
+	struct ecdh p = {0};
+
+	p.curve_id = ECC_CURVE_NIST_P256;
+
+	if (private_key) {
+		tmp = kmalloc(32, GFP_KERNEL);
+		if (!tmp)
+			return -ENOMEM;
+		swap_digits((u64 *)private_key, (u64 *)tmp, 4);
+		p.key = tmp;
+		p.key_size = 32;
+	}
+
+	buf_len = crypto_ecdh_key_len(&p);
+	buf = kmalloc(buf_len, GFP_KERNEL);
+	if (!buf) {
+		err = -ENOMEM;
+		goto free_tmp;
+	}
+
+	err = crypto_ecdh_encode_key(buf, buf_len, &p);
+	if (err)
+		goto free_all;
+
+	err = crypto_kpp_set_secret(tfm, buf, buf_len);
+	/* fall through */
+free_all:
+	kfree_sensitive(buf);
+free_tmp:
+	kfree_sensitive(tmp);
+	return err;
+}
+
+/* generate_ecdh_public_key() - function assumes that the private key was
+ *                              already set.
+ *
+ * @tfm:          KPP tfm handle allocated with crypto_alloc_kpp().
+ * @public_key:   memory where the computed ecc public key will be saved.
+ *
+ * Return: zero on success; error code in case of error.
+ */
+int generate_ecdh_public_key(struct crypto_kpp *tfm, u8 public_key[64])
+{
+	struct kpp_request *req;
+	u8 *tmp;
+	struct ecdh_completion result;
+	struct scatterlist dst;
+	int err;
+
+	tmp = kmalloc(64, GFP_KERNEL);
+	if (!tmp)
+		return -ENOMEM;
+
+	req = kpp_request_alloc(tfm, GFP_KERNEL);
+	if (!req) {
+		err = -ENOMEM;
+		goto free_tmp;
+	}
+
+	init_completion(&result.completion);
+	sg_init_one(&dst, tmp, 64);
+	kpp_request_set_input(req, NULL, 0);
+	kpp_request_set_output(req, &dst, 64);
+	kpp_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
+				 ecdh_complete, &result);
+
+	err = crypto_kpp_generate_public_key(req);
+	if (err == -EINPROGRESS) {
+		wait_for_completion(&result.completion);
+		err = result.err;
+	}
+	if (err < 0)
+		goto free_all;
+
+	/* The public key is handed back in little endian as expected by
+	 * the Security Manager Protocol.
+	 */
+	swap_digits((u64 *)tmp, (u64 *)public_key, 4); /* x */
+	swap_digits((u64 *)&tmp[32], (u64 *)&public_key[32], 4); /* y */
+
+free_all:
+	kpp_request_free(req);
+free_tmp:
+	kfree(tmp);
+	return err;
+}
+
+/* generate_ecdh_keys() - generate ecc key pair.
+ *
+ * @tfm:          KPP tfm handle allocated with crypto_alloc_kpp().
+ * @public_key:   memory where the computed ecc public key will be saved.
+ *
+ * Return: zero on success; error code in case of error.
+ */
+int generate_ecdh_keys(struct crypto_kpp *tfm, u8 public_key[64])
+{
+	int err;
+
+	err = set_ecdh_privkey(tfm, NULL);
+	if (err)
+		return err;
+
+	return generate_ecdh_public_key(tfm, public_key);
+}
diff --git a/net/bluetooth/ecdh_helper.h b/net/bluetooth/ecdh_helper.h
new file mode 100644
index 000000000..830723971
--- /dev/null
+++ b/net/bluetooth/ecdh_helper.h
@@ -0,0 +1,30 @@
+/*
+ * ECDH helper functions - KPP wrappings
+ *
+ * Copyright (C) 2017 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+ * CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+ * COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+ * SOFTWARE IS DISCLAIMED.
+ */
+#include <crypto/kpp.h>
+#include <linux/types.h>
+
+int compute_ecdh_secret(struct crypto_kpp *tfm, const u8 pair_public_key[64],
+			u8 secret[32]);
+int set_ecdh_privkey(struct crypto_kpp *tfm, const u8 private_key[32]);
+int generate_ecdh_public_key(struct crypto_kpp *tfm, u8 public_key[64]);
+int generate_ecdh_keys(struct crypto_kpp *tfm, u8 public_key[64]);
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
new file mode 100644
index 000000000..52e512f41
--- /dev/null
+++ b/net/bluetooth/hci_conn.c
@@ -0,0 +1,1903 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
+
+   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth HCI connection handling. */
+
+#include <linux/export.h>
+#include <linux/debugfs.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/l2cap.h>
+
+#include "hci_request.h"
+#include "smp.h"
+#include "a2mp.h"
+
+struct sco_param {
+	u16 pkt_type;
+	u16 max_latency;
+	u8  retrans_effort;
+};
+
+static const struct sco_param esco_param_cvsd[] = {
+	{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a,	0x01 }, /* S3 */
+	{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007,	0x01 }, /* S2 */
+	{ EDR_ESCO_MASK | ESCO_EV3,   0x0007,	0x01 }, /* S1 */
+	{ EDR_ESCO_MASK | ESCO_HV3,   0xffff,	0x01 }, /* D1 */
+	{ EDR_ESCO_MASK | ESCO_HV1,   0xffff,	0x01 }, /* D0 */
+};
+
+static const struct sco_param sco_param_cvsd[] = {
+	{ EDR_ESCO_MASK | ESCO_HV3,   0xffff,	0xff }, /* D1 */
+	{ EDR_ESCO_MASK | ESCO_HV1,   0xffff,	0xff }, /* D0 */
+};
+
+static const struct sco_param esco_param_msbc[] = {
+	{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d,	0x02 }, /* T2 */
+	{ EDR_ESCO_MASK | ESCO_EV3,   0x0008,	0x02 }, /* T1 */
+};
+
+/* This function requires the caller holds hdev->lock */
+static void hci_connect_le_scan_cleanup(struct hci_conn *conn)
+{
+	struct hci_conn_params *params;
+	struct hci_dev *hdev = conn->hdev;
+	struct smp_irk *irk;
+	bdaddr_t *bdaddr;
+	u8 bdaddr_type;
+
+	bdaddr = &conn->dst;
+	bdaddr_type = conn->dst_type;
+
+	/* Check if we need to convert to identity address */
+	irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
+	if (irk) {
+		bdaddr = &irk->bdaddr;
+		bdaddr_type = irk->addr_type;
+	}
+
+	params = hci_pend_le_action_lookup(&hdev->pend_le_conns, bdaddr,
+					   bdaddr_type);
+	if (!params || !params->explicit_connect)
+		return;
+
+	/* The connection attempt was doing scan for new RPA, and is
+	 * in scan phase. If params are not associated with any other
+	 * autoconnect action, remove them completely. If they are, just unmark
+	 * them as waiting for connection, by clearing explicit_connect field.
+	 */
+	params->explicit_connect = false;
+
+	list_del_init(&params->action);
+
+	switch (params->auto_connect) {
+	case HCI_AUTO_CONN_EXPLICIT:
+		hci_conn_params_del(hdev, bdaddr, bdaddr_type);
+		/* return instead of break to avoid duplicate scan update */
+		return;
+	case HCI_AUTO_CONN_DIRECT:
+	case HCI_AUTO_CONN_ALWAYS:
+		list_add(&params->action, &hdev->pend_le_conns);
+		break;
+	case HCI_AUTO_CONN_REPORT:
+		list_add(&params->action, &hdev->pend_le_reports);
+		break;
+	default:
+		break;
+	}
+
+	hci_update_background_scan(hdev);
+}
+
+static void hci_conn_cleanup(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+
+	if (test_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags))
+		hci_conn_params_del(conn->hdev, &conn->dst, conn->dst_type);
+
+	hci_chan_list_flush(conn);
+
+	hci_conn_hash_del(hdev, conn);
+
+	if (conn->type == SCO_LINK || conn->type == ESCO_LINK) {
+		switch (conn->setting & SCO_AIRMODE_MASK) {
+		case SCO_AIRMODE_CVSD:
+		case SCO_AIRMODE_TRANSP:
+			if (hdev->notify)
+				hdev->notify(hdev, HCI_NOTIFY_DISABLE_SCO);
+			break;
+		}
+	} else {
+		if (hdev->notify)
+			hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
+	}
+
+	debugfs_remove_recursive(conn->debugfs);
+
+	hci_conn_del_sysfs(conn);
+
+	hci_dev_put(hdev);
+}
+
+static void le_scan_cleanup(struct work_struct *work)
+{
+	struct hci_conn *conn = container_of(work, struct hci_conn,
+					     le_scan_cleanup);
+	struct hci_dev *hdev = conn->hdev;
+	struct hci_conn *c = NULL;
+
+	BT_DBG("%s hcon %p", hdev->name, conn);
+
+	hci_dev_lock(hdev);
+
+	/* Check that the hci_conn is still around */
+	rcu_read_lock();
+	list_for_each_entry_rcu(c, &hdev->conn_hash.list, list) {
+		if (c == conn)
+			break;
+	}
+	rcu_read_unlock();
+
+	if (c == conn) {
+		hci_connect_le_scan_cleanup(conn);
+		hci_conn_cleanup(conn);
+	}
+
+	hci_dev_unlock(hdev);
+	hci_dev_put(hdev);
+	hci_conn_put(conn);
+}
+
+static void hci_connect_le_scan_remove(struct hci_conn *conn)
+{
+	BT_DBG("%s hcon %p", conn->hdev->name, conn);
+
+	/* We can't call hci_conn_del/hci_conn_cleanup here since that
+	 * could deadlock with another hci_conn_del() call that's holding
+	 * hci_dev_lock and doing cancel_delayed_work_sync(&conn->disc_work).
+	 * Instead, grab temporary extra references to the hci_dev and
+	 * hci_conn and perform the necessary cleanup in a separate work
+	 * callback.
+	 */
+
+	hci_dev_hold(conn->hdev);
+	hci_conn_get(conn);
+
+	/* Even though we hold a reference to the hdev, many other
+	 * things might get cleaned up meanwhile, including the hdev's
+	 * own workqueue, so we can't use that for scheduling.
+	 */
+	schedule_work(&conn->le_scan_cleanup);
+}
+
+static void hci_acl_create_connection(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct inquiry_entry *ie;
+	struct hci_cp_create_conn cp;
+
+	BT_DBG("hcon %p", conn);
+
+	conn->state = BT_CONNECT;
+	conn->out = true;
+	conn->role = HCI_ROLE_MASTER;
+
+	conn->attempt++;
+
+	conn->link_policy = hdev->link_policy;
+
+	memset(&cp, 0, sizeof(cp));
+	bacpy(&cp.bdaddr, &conn->dst);
+	cp.pscan_rep_mode = 0x02;
+
+	ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
+	if (ie) {
+		if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
+			cp.pscan_rep_mode = ie->data.pscan_rep_mode;
+			cp.pscan_mode     = ie->data.pscan_mode;
+			cp.clock_offset   = ie->data.clock_offset |
+					    cpu_to_le16(0x8000);
+		}
+
+		memcpy(conn->dev_class, ie->data.dev_class, 3);
+	}
+
+	cp.pkt_type = cpu_to_le16(conn->pkt_type);
+	if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
+		cp.role_switch = 0x01;
+	else
+		cp.role_switch = 0x00;
+
+	hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
+}
+
+int hci_disconnect(struct hci_conn *conn, __u8 reason)
+{
+	BT_DBG("hcon %p", conn);
+
+	/* When we are central of an established connection and it enters
+	 * the disconnect timeout, then go ahead and try to read the
+	 * current clock offset.  Processing of the result is done
+	 * within the event handling and hci_clock_offset_evt function.
+	 */
+	if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER &&
+	    (conn->state == BT_CONNECTED || conn->state == BT_CONFIG)) {
+		struct hci_dev *hdev = conn->hdev;
+		struct hci_cp_read_clock_offset clkoff_cp;
+
+		clkoff_cp.handle = cpu_to_le16(conn->handle);
+		hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp),
+			     &clkoff_cp);
+	}
+
+	return hci_abort_conn(conn, reason);
+}
+
+static void hci_add_sco(struct hci_conn *conn, __u16 handle)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct hci_cp_add_sco cp;
+
+	BT_DBG("hcon %p", conn);
+
+	conn->state = BT_CONNECT;
+	conn->out = true;
+
+	conn->attempt++;
+
+	cp.handle   = cpu_to_le16(handle);
+	cp.pkt_type = cpu_to_le16(conn->pkt_type);
+
+	hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
+}
+
+bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct hci_cp_setup_sync_conn cp;
+	const struct sco_param *param;
+
+	BT_DBG("hcon %p", conn);
+
+	conn->state = BT_CONNECT;
+	conn->out = true;
+
+	conn->attempt++;
+
+	cp.handle   = cpu_to_le16(handle);
+
+	cp.tx_bandwidth   = cpu_to_le32(0x00001f40);
+	cp.rx_bandwidth   = cpu_to_le32(0x00001f40);
+	cp.voice_setting  = cpu_to_le16(conn->setting);
+
+	switch (conn->setting & SCO_AIRMODE_MASK) {
+	case SCO_AIRMODE_TRANSP:
+		if (conn->attempt > ARRAY_SIZE(esco_param_msbc))
+			return false;
+		param = &esco_param_msbc[conn->attempt - 1];
+		break;
+	case SCO_AIRMODE_CVSD:
+		if (lmp_esco_capable(conn->link)) {
+			if (conn->attempt > ARRAY_SIZE(esco_param_cvsd))
+				return false;
+			param = &esco_param_cvsd[conn->attempt - 1];
+		} else {
+			if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
+				return false;
+			param = &sco_param_cvsd[conn->attempt - 1];
+		}
+		break;
+	default:
+		return false;
+	}
+
+	cp.retrans_effort = param->retrans_effort;
+	cp.pkt_type = __cpu_to_le16(param->pkt_type);
+	cp.max_latency = __cpu_to_le16(param->max_latency);
+
+	if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0)
+		return false;
+
+	return true;
+}
+
+u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
+		      u16 to_multiplier)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct hci_conn_params *params;
+	struct hci_cp_le_conn_update cp;
+
+	hci_dev_lock(hdev);
+
+	params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
+	if (params) {
+		params->conn_min_interval = min;
+		params->conn_max_interval = max;
+		params->conn_latency = latency;
+		params->supervision_timeout = to_multiplier;
+	}
+
+	hci_dev_unlock(hdev);
+
+	memset(&cp, 0, sizeof(cp));
+	cp.handle		= cpu_to_le16(conn->handle);
+	cp.conn_interval_min	= cpu_to_le16(min);
+	cp.conn_interval_max	= cpu_to_le16(max);
+	cp.conn_latency		= cpu_to_le16(latency);
+	cp.supervision_timeout	= cpu_to_le16(to_multiplier);
+	cp.min_ce_len		= cpu_to_le16(0x0000);
+	cp.max_ce_len		= cpu_to_le16(0x0000);
+
+	hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
+
+	if (params)
+		return 0x01;
+
+	return 0x00;
+}
+
+void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
+		      __u8 ltk[16], __u8 key_size)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct hci_cp_le_start_enc cp;
+
+	BT_DBG("hcon %p", conn);
+
+	memset(&cp, 0, sizeof(cp));
+
+	cp.handle = cpu_to_le16(conn->handle);
+	cp.rand = rand;
+	cp.ediv = ediv;
+	memcpy(cp.ltk, ltk, key_size);
+
+	hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
+}
+
+/* Device _must_ be locked */
+void hci_sco_setup(struct hci_conn *conn, __u8 status)
+{
+	struct hci_conn *sco = conn->link;
+
+	if (!sco)
+		return;
+
+	BT_DBG("hcon %p", conn);
+
+	if (!status) {
+		if (lmp_esco_capable(conn->hdev))
+			hci_setup_sync(sco, conn->handle);
+		else
+			hci_add_sco(sco, conn->handle);
+	} else {
+		hci_connect_cfm(sco, status);
+		hci_conn_del(sco);
+	}
+}
+
+static void hci_conn_timeout(struct work_struct *work)
+{
+	struct hci_conn *conn = container_of(work, struct hci_conn,
+					     disc_work.work);
+	int refcnt = atomic_read(&conn->refcnt);
+
+	BT_DBG("hcon %p state %s", conn, state_to_string(conn->state));
+
+	WARN_ON(refcnt < 0);
+
+	/* FIXME: It was observed that in pairing failed scenario, refcnt
+	 * drops below 0. Probably this is because l2cap_conn_del calls
+	 * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is
+	 * dropped. After that loop hci_chan_del is called which also drops
+	 * conn. For now make sure that ACL is alive if refcnt is higher then 0,
+	 * otherwise drop it.
+	 */
+	if (refcnt > 0)
+		return;
+
+	/* LE connections in scanning state need special handling */
+	if (conn->state == BT_CONNECT && conn->type == LE_LINK &&
+	    test_bit(HCI_CONN_SCANNING, &conn->flags)) {
+		hci_connect_le_scan_remove(conn);
+		return;
+	}
+
+	hci_abort_conn(conn, hci_proto_disconn_ind(conn));
+}
+
+/* Enter sniff mode */
+static void hci_conn_idle(struct work_struct *work)
+{
+	struct hci_conn *conn = container_of(work, struct hci_conn,
+					     idle_work.work);
+	struct hci_dev *hdev = conn->hdev;
+
+	BT_DBG("hcon %p mode %d", conn, conn->mode);
+
+	if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
+		return;
+
+	if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
+		return;
+
+	if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
+		struct hci_cp_sniff_subrate cp;
+		cp.handle             = cpu_to_le16(conn->handle);
+		cp.max_latency        = cpu_to_le16(0);
+		cp.min_remote_timeout = cpu_to_le16(0);
+		cp.min_local_timeout  = cpu_to_le16(0);
+		hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
+	}
+
+	if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
+		struct hci_cp_sniff_mode cp;
+		cp.handle       = cpu_to_le16(conn->handle);
+		cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
+		cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
+		cp.attempt      = cpu_to_le16(4);
+		cp.timeout      = cpu_to_le16(1);
+		hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
+	}
+}
+
+static void hci_conn_auto_accept(struct work_struct *work)
+{
+	struct hci_conn *conn = container_of(work, struct hci_conn,
+					     auto_accept_work.work);
+
+	hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
+		     &conn->dst);
+}
+
+static void le_disable_advertising(struct hci_dev *hdev)
+{
+	if (ext_adv_capable(hdev)) {
+		struct hci_cp_le_set_ext_adv_enable cp;
+
+		cp.enable = 0x00;
+		cp.num_of_sets = 0x00;
+
+		hci_send_cmd(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE, sizeof(cp),
+			     &cp);
+	} else {
+		u8 enable = 0x00;
+		hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
+			     &enable);
+	}
+}
+
+static void le_conn_timeout(struct work_struct *work)
+{
+	struct hci_conn *conn = container_of(work, struct hci_conn,
+					     le_conn_timeout.work);
+	struct hci_dev *hdev = conn->hdev;
+
+	BT_DBG("");
+
+	/* We could end up here due to having done directed advertising,
+	 * so clean up the state if necessary. This should however only
+	 * happen with broken hardware or if low duty cycle was used
+	 * (which doesn't have a timeout of its own).
+	 */
+	if (conn->role == HCI_ROLE_SLAVE) {
+		/* Disable LE Advertising */
+		le_disable_advertising(hdev);
+		hci_dev_lock(hdev);
+		hci_le_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT);
+		hci_dev_unlock(hdev);
+		return;
+	}
+
+	hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM);
+}
+
+struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
+			      u8 role)
+{
+	struct hci_conn *conn;
+
+	BT_DBG("%s dst %pMR", hdev->name, dst);
+
+	conn = kzalloc(sizeof(*conn), GFP_KERNEL);
+	if (!conn)
+		return NULL;
+
+	bacpy(&conn->dst, dst);
+	bacpy(&conn->src, &hdev->bdaddr);
+	conn->hdev  = hdev;
+	conn->type  = type;
+	conn->role  = role;
+	conn->mode  = HCI_CM_ACTIVE;
+	conn->state = BT_OPEN;
+	conn->auth_type = HCI_AT_GENERAL_BONDING;
+	conn->io_capability = hdev->io_capability;
+	conn->remote_auth = 0xff;
+	conn->key_type = 0xff;
+	conn->rssi = HCI_RSSI_INVALID;
+	conn->tx_power = HCI_TX_POWER_INVALID;
+	conn->max_tx_power = HCI_TX_POWER_INVALID;
+
+	set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
+	conn->disc_timeout = HCI_DISCONN_TIMEOUT;
+
+	/* Set Default Authenticated payload timeout to 30s */
+	conn->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
+
+	if (conn->role == HCI_ROLE_MASTER)
+		conn->out = true;
+
+	switch (type) {
+	case ACL_LINK:
+		conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
+		break;
+	case LE_LINK:
+		/* conn->src should reflect the local identity address */
+		hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
+		break;
+	case SCO_LINK:
+		if (lmp_esco_capable(hdev))
+			conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
+					(hdev->esco_type & EDR_ESCO_MASK);
+		else
+			conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
+		break;
+	case ESCO_LINK:
+		conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
+		break;
+	}
+
+	skb_queue_head_init(&conn->data_q);
+
+	INIT_LIST_HEAD(&conn->chan_list);
+
+	INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
+	INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept);
+	INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle);
+	INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout);
+	INIT_WORK(&conn->le_scan_cleanup, le_scan_cleanup);
+
+	atomic_set(&conn->refcnt, 0);
+
+	hci_dev_hold(hdev);
+
+	hci_conn_hash_add(hdev, conn);
+
+	/* The SCO and eSCO connections will only be notified when their
+	 * setup has been completed. This is different to ACL links which
+	 * can be notified right away.
+	 */
+	if (conn->type != SCO_LINK && conn->type != ESCO_LINK) {
+		if (hdev->notify)
+			hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
+	}
+
+	hci_conn_init_sysfs(conn);
+
+	return conn;
+}
+
+int hci_conn_del(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+
+	BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
+
+	cancel_delayed_work_sync(&conn->disc_work);
+	cancel_delayed_work_sync(&conn->auto_accept_work);
+	cancel_delayed_work_sync(&conn->idle_work);
+
+	if (conn->type == ACL_LINK) {
+		struct hci_conn *sco = conn->link;
+		if (sco)
+			sco->link = NULL;
+
+		/* Unacked frames */
+		hdev->acl_cnt += conn->sent;
+	} else if (conn->type == LE_LINK) {
+		cancel_delayed_work(&conn->le_conn_timeout);
+
+		if (hdev->le_pkts)
+			hdev->le_cnt += conn->sent;
+		else
+			hdev->acl_cnt += conn->sent;
+	} else {
+		struct hci_conn *acl = conn->link;
+		if (acl) {
+			acl->link = NULL;
+			hci_conn_drop(acl);
+		}
+	}
+
+	if (conn->amp_mgr)
+		amp_mgr_put(conn->amp_mgr);
+
+	skb_queue_purge(&conn->data_q);
+
+	/* Remove the connection from the list and cleanup its remaining
+	 * state. This is a separate function since for some cases like
+	 * BT_CONNECT_SCAN we *only* want the cleanup part without the
+	 * rest of hci_conn_del.
+	 */
+	hci_conn_cleanup(conn);
+
+	return 0;
+}
+
+struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, uint8_t src_type)
+{
+	int use_src = bacmp(src, BDADDR_ANY);
+	struct hci_dev *hdev = NULL, *d;
+
+	BT_DBG("%pMR -> %pMR", src, dst);
+
+	read_lock(&hci_dev_list_lock);
+
+	list_for_each_entry(d, &hci_dev_list, list) {
+		if (!test_bit(HCI_UP, &d->flags) ||
+		    hci_dev_test_flag(d, HCI_USER_CHANNEL) ||
+		    d->dev_type != HCI_PRIMARY)
+			continue;
+
+		/* Simple routing:
+		 *   No source address - find interface with bdaddr != dst
+		 *   Source address    - find interface with bdaddr == src
+		 */
+
+		if (use_src) {
+			bdaddr_t id_addr;
+			u8 id_addr_type;
+
+			if (src_type == BDADDR_BREDR) {
+				if (!lmp_bredr_capable(d))
+					continue;
+				bacpy(&id_addr, &d->bdaddr);
+				id_addr_type = BDADDR_BREDR;
+			} else {
+				if (!lmp_le_capable(d))
+					continue;
+
+				hci_copy_identity_address(d, &id_addr,
+							  &id_addr_type);
+
+				/* Convert from HCI to three-value type */
+				if (id_addr_type == ADDR_LE_DEV_PUBLIC)
+					id_addr_type = BDADDR_LE_PUBLIC;
+				else
+					id_addr_type = BDADDR_LE_RANDOM;
+			}
+
+			if (!bacmp(&id_addr, src) && id_addr_type == src_type) {
+				hdev = d; break;
+			}
+		} else {
+			if (bacmp(&d->bdaddr, dst)) {
+				hdev = d; break;
+			}
+		}
+	}
+
+	if (hdev)
+		hdev = hci_dev_hold(hdev);
+
+	read_unlock(&hci_dev_list_lock);
+	return hdev;
+}
+EXPORT_SYMBOL(hci_get_route);
+
+/* This function requires the caller holds hdev->lock */
+void hci_le_conn_failed(struct hci_conn *conn, u8 status)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct hci_conn_params *params;
+
+	params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
+					   conn->dst_type);
+	if (params && params->conn) {
+		hci_conn_drop(params->conn);
+		hci_conn_put(params->conn);
+		params->conn = NULL;
+	}
+
+	conn->state = BT_CLOSED;
+
+	/* If the status indicates successful cancellation of
+	 * the attempt (i.e. Unkown Connection Id) there's no point of
+	 * notifying failure since we'll go back to keep trying to
+	 * connect. The only exception is explicit connect requests
+	 * where a timeout + cancel does indicate an actual failure.
+	 */
+	if (status != HCI_ERROR_UNKNOWN_CONN_ID ||
+	    (params && params->explicit_connect))
+		mgmt_connect_failed(hdev, &conn->dst, conn->type,
+				    conn->dst_type, status);
+
+	hci_connect_cfm(conn, status);
+
+	hci_conn_del(conn);
+
+	/* Since we may have temporarily stopped the background scanning in
+	 * favor of connection establishment, we should restart it.
+	 */
+	hci_update_background_scan(hdev);
+
+	/* Re-enable advertising in case this was a failed connection
+	 * attempt as a peripheral.
+	 */
+	hci_req_reenable_advertising(hdev);
+}
+
+static void create_le_conn_complete(struct hci_dev *hdev, u8 status, u16 opcode)
+{
+	struct hci_conn *conn;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_lookup_le_connect(hdev);
+
+	if (!status) {
+		hci_connect_le_scan_cleanup(conn);
+		goto done;
+	}
+
+	bt_dev_err(hdev, "request failed to create LE connection: "
+		   "status 0x%2.2x", status);
+
+	if (!conn)
+		goto done;
+
+	hci_le_conn_failed(conn, status);
+
+done:
+	hci_dev_unlock(hdev);
+}
+
+static bool conn_use_rpa(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+
+	return hci_dev_test_flag(hdev, HCI_PRIVACY);
+}
+
+static void set_ext_conn_params(struct hci_conn *conn,
+				struct hci_cp_le_ext_conn_param *p)
+{
+	struct hci_dev *hdev = conn->hdev;
+
+	memset(p, 0, sizeof(*p));
+
+	p->scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
+	p->scan_window = cpu_to_le16(hdev->le_scan_window_connect);
+	p->conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
+	p->conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
+	p->conn_latency = cpu_to_le16(conn->le_conn_latency);
+	p->supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
+	p->min_ce_len = cpu_to_le16(0x0000);
+	p->max_ce_len = cpu_to_le16(0x0000);
+}
+
+static void hci_req_add_le_create_conn(struct hci_request *req,
+				       struct hci_conn *conn,
+				       bdaddr_t *direct_rpa)
+{
+	struct hci_dev *hdev = conn->hdev;
+	u8 own_addr_type;
+
+	/* If direct address was provided we use it instead of current
+	 * address.
+	 */
+	if (direct_rpa) {
+		if (bacmp(&req->hdev->random_addr, direct_rpa))
+			hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6,
+								direct_rpa);
+
+		/* direct address is always RPA */
+		own_addr_type = ADDR_LE_DEV_RANDOM;
+	} else {
+		/* Update random address, but set require_privacy to false so
+		 * that we never connect with an non-resolvable address.
+		 */
+		if (hci_update_random_address(req, false, conn_use_rpa(conn),
+					      &own_addr_type))
+			return;
+	}
+
+	if (use_ext_conn(hdev)) {
+		struct hci_cp_le_ext_create_conn *cp;
+		struct hci_cp_le_ext_conn_param *p;
+		u8 data[sizeof(*cp) + sizeof(*p) * 3];
+		u32 plen;
+
+		cp = (void *) data;
+		p = (void *) cp->data;
+
+		memset(cp, 0, sizeof(*cp));
+
+		bacpy(&cp->peer_addr, &conn->dst);
+		cp->peer_addr_type = conn->dst_type;
+		cp->own_addr_type = own_addr_type;
+
+		plen = sizeof(*cp);
+
+		if (scan_1m(hdev)) {
+			cp->phys |= LE_SCAN_PHY_1M;
+			set_ext_conn_params(conn, p);
+
+			p++;
+			plen += sizeof(*p);
+		}
+
+		if (scan_2m(hdev)) {
+			cp->phys |= LE_SCAN_PHY_2M;
+			set_ext_conn_params(conn, p);
+
+			p++;
+			plen += sizeof(*p);
+		}
+
+		if (scan_coded(hdev)) {
+			cp->phys |= LE_SCAN_PHY_CODED;
+			set_ext_conn_params(conn, p);
+
+			plen += sizeof(*p);
+		}
+
+		hci_req_add(req, HCI_OP_LE_EXT_CREATE_CONN, plen, data);
+
+	} else {
+		struct hci_cp_le_create_conn cp;
+
+		memset(&cp, 0, sizeof(cp));
+
+		cp.scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
+		cp.scan_window = cpu_to_le16(hdev->le_scan_window_connect);
+
+		bacpy(&cp.peer_addr, &conn->dst);
+		cp.peer_addr_type = conn->dst_type;
+		cp.own_address_type = own_addr_type;
+		cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
+		cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
+		cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
+		cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
+		cp.min_ce_len = cpu_to_le16(0x0000);
+		cp.max_ce_len = cpu_to_le16(0x0000);
+
+		hci_req_add(req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
+	}
+
+	conn->state = BT_CONNECT;
+	clear_bit(HCI_CONN_SCANNING, &conn->flags);
+}
+
+static void hci_req_directed_advertising(struct hci_request *req,
+					 struct hci_conn *conn)
+{
+	struct hci_dev *hdev = req->hdev;
+	u8 own_addr_type;
+	u8 enable;
+
+	if (ext_adv_capable(hdev)) {
+		struct hci_cp_le_set_ext_adv_params cp;
+		bdaddr_t random_addr;
+
+		/* Set require_privacy to false so that the remote device has a
+		 * chance of identifying us.
+		 */
+		if (hci_get_random_address(hdev, false, conn_use_rpa(conn), NULL,
+					   &own_addr_type, &random_addr) < 0)
+			return;
+
+		memset(&cp, 0, sizeof(cp));
+
+		cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_DIRECT_IND);
+		cp.own_addr_type = own_addr_type;
+		cp.channel_map = hdev->le_adv_channel_map;
+		cp.tx_power = HCI_TX_POWER_INVALID;
+		cp.primary_phy = HCI_ADV_PHY_1M;
+		cp.secondary_phy = HCI_ADV_PHY_1M;
+		cp.handle = 0; /* Use instance 0 for directed adv */
+		cp.own_addr_type = own_addr_type;
+		cp.peer_addr_type = conn->dst_type;
+		bacpy(&cp.peer_addr, &conn->dst);
+
+		/* As per Core Spec 5.2 Vol 2, PART E, Sec 7.8.53, for
+		 * advertising_event_property LE_LEGACY_ADV_DIRECT_IND
+		 * does not supports advertising data when the advertising set already
+		 * contains some, the controller shall return erroc code 'Invalid
+		 * HCI Command Parameters(0x12).
+		 * So it is required to remove adv set for handle 0x00. since we use
+		 * instance 0 for directed adv.
+		 */
+		__hci_req_remove_ext_adv_instance(req, cp.handle);
+
+		hci_req_add(req, HCI_OP_LE_SET_EXT_ADV_PARAMS, sizeof(cp), &cp);
+
+		if (own_addr_type == ADDR_LE_DEV_RANDOM &&
+		    bacmp(&random_addr, BDADDR_ANY) &&
+		    bacmp(&random_addr, &hdev->random_addr)) {
+			struct hci_cp_le_set_adv_set_rand_addr cp;
+
+			memset(&cp, 0, sizeof(cp));
+
+			cp.handle = 0;
+			bacpy(&cp.bdaddr, &random_addr);
+
+			hci_req_add(req,
+				    HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
+				    sizeof(cp), &cp);
+		}
+
+		__hci_req_enable_ext_advertising(req, 0x00);
+	} else {
+		struct hci_cp_le_set_adv_param cp;
+
+		/* Clear the HCI_LE_ADV bit temporarily so that the
+		 * hci_update_random_address knows that it's safe to go ahead
+		 * and write a new random address. The flag will be set back on
+		 * as soon as the SET_ADV_ENABLE HCI command completes.
+		 */
+		hci_dev_clear_flag(hdev, HCI_LE_ADV);
+
+		/* Set require_privacy to false so that the remote device has a
+		 * chance of identifying us.
+		 */
+		if (hci_update_random_address(req, false, conn_use_rpa(conn),
+					      &own_addr_type) < 0)
+			return;
+
+		memset(&cp, 0, sizeof(cp));
+
+		/* Some controllers might reject command if intervals are not
+		 * within range for undirected advertising.
+		 * BCM20702A0 is known to be affected by this.
+		 */
+		cp.min_interval = cpu_to_le16(0x0020);
+		cp.max_interval = cpu_to_le16(0x0020);
+
+		cp.type = LE_ADV_DIRECT_IND;
+		cp.own_address_type = own_addr_type;
+		cp.direct_addr_type = conn->dst_type;
+		bacpy(&cp.direct_addr, &conn->dst);
+		cp.channel_map = hdev->le_adv_channel_map;
+
+		hci_req_add(req, HCI_OP_LE_SET_ADV_PARAM, sizeof(cp), &cp);
+
+		enable = 0x01;
+		hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
+			    &enable);
+	}
+
+	conn->state = BT_CONNECT;
+}
+
+struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
+				u8 dst_type, u8 sec_level, u16 conn_timeout,
+				u8 role, bdaddr_t *direct_rpa)
+{
+	struct hci_conn_params *params;
+	struct hci_conn *conn;
+	struct smp_irk *irk;
+	struct hci_request req;
+	int err;
+
+	/* This ensures that during disable le_scan address resolution
+	 * will not be disabled if it is followed by le_create_conn
+	 */
+	bool rpa_le_conn = true;
+
+	/* Let's make sure that le is enabled.*/
+	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
+		if (lmp_le_capable(hdev))
+			return ERR_PTR(-ECONNREFUSED);
+
+		return ERR_PTR(-EOPNOTSUPP);
+	}
+
+	/* Since the controller supports only one LE connection attempt at a
+	 * time, we return -EBUSY if there is any connection attempt running.
+	 */
+	if (hci_lookup_le_connect(hdev))
+		return ERR_PTR(-EBUSY);
+
+	/* If there's already a connection object but it's not in
+	 * scanning state it means it must already be established, in
+	 * which case we can't do anything else except report a failure
+	 * to connect.
+	 */
+	conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
+	if (conn && !test_bit(HCI_CONN_SCANNING, &conn->flags)) {
+		return ERR_PTR(-EBUSY);
+	}
+
+	/* When given an identity address with existing identity
+	 * resolving key, the connection needs to be established
+	 * to a resolvable random address.
+	 *
+	 * Storing the resolvable random address is required here
+	 * to handle connection failures. The address will later
+	 * be resolved back into the original identity address
+	 * from the connect request.
+	 */
+	irk = hci_find_irk_by_addr(hdev, dst, dst_type);
+	if (irk && bacmp(&irk->rpa, BDADDR_ANY)) {
+		dst = &irk->rpa;
+		dst_type = ADDR_LE_DEV_RANDOM;
+	}
+
+	if (conn) {
+		bacpy(&conn->dst, dst);
+	} else {
+		conn = hci_conn_add(hdev, LE_LINK, dst, role);
+		if (!conn)
+			return ERR_PTR(-ENOMEM);
+		hci_conn_hold(conn);
+		conn->pending_sec_level = sec_level;
+	}
+
+	conn->dst_type = dst_type;
+	conn->sec_level = BT_SECURITY_LOW;
+	conn->conn_timeout = conn_timeout;
+
+	hci_req_init(&req, hdev);
+
+	/* Disable advertising if we're active. For central role
+	 * connections most controllers will refuse to connect if
+	 * advertising is enabled, and for peripheral role connections we
+	 * anyway have to disable it in order to start directed
+	 * advertising.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_LE_ADV))
+		 __hci_req_disable_advertising(&req);
+
+	/* If requested to connect as peripheral use directed advertising */
+	if (conn->role == HCI_ROLE_SLAVE) {
+		/* If we're active scanning most controllers are unable
+		 * to initiate advertising. Simply reject the attempt.
+		 */
+		if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
+		    hdev->le_scan_type == LE_SCAN_ACTIVE) {
+			hci_req_purge(&req);
+			hci_conn_del(conn);
+			return ERR_PTR(-EBUSY);
+		}
+
+		hci_req_directed_advertising(&req, conn);
+		goto create_conn;
+	}
+
+	params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
+	if (params) {
+		conn->le_conn_min_interval = params->conn_min_interval;
+		conn->le_conn_max_interval = params->conn_max_interval;
+		conn->le_conn_latency = params->conn_latency;
+		conn->le_supv_timeout = params->supervision_timeout;
+	} else {
+		conn->le_conn_min_interval = hdev->le_conn_min_interval;
+		conn->le_conn_max_interval = hdev->le_conn_max_interval;
+		conn->le_conn_latency = hdev->le_conn_latency;
+		conn->le_supv_timeout = hdev->le_supv_timeout;
+	}
+
+	/* If controller is scanning, we stop it since some controllers are
+	 * not able to scan and connect at the same time. Also set the
+	 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
+	 * handler for scan disabling knows to set the correct discovery
+	 * state.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
+		hci_req_add_le_scan_disable(&req, rpa_le_conn);
+		hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
+	}
+
+	hci_req_add_le_create_conn(&req, conn, direct_rpa);
+
+create_conn:
+	err = hci_req_run(&req, create_le_conn_complete);
+	if (err) {
+		hci_conn_del(conn);
+		return ERR_PTR(err);
+	}
+
+	return conn;
+}
+
+static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
+{
+	struct hci_conn *conn;
+
+	conn = hci_conn_hash_lookup_le(hdev, addr, type);
+	if (!conn)
+		return false;
+
+	if (conn->state != BT_CONNECTED)
+		return false;
+
+	return true;
+}
+
+/* This function requires the caller holds hdev->lock */
+static int hci_explicit_conn_params_set(struct hci_dev *hdev,
+					bdaddr_t *addr, u8 addr_type)
+{
+	struct hci_conn_params *params;
+
+	if (is_connected(hdev, addr, addr_type))
+		return -EISCONN;
+
+	params = hci_conn_params_lookup(hdev, addr, addr_type);
+	if (!params) {
+		params = hci_conn_params_add(hdev, addr, addr_type);
+		if (!params)
+			return -ENOMEM;
+
+		/* If we created new params, mark them to be deleted in
+		 * hci_connect_le_scan_cleanup. It's different case than
+		 * existing disabled params, those will stay after cleanup.
+		 */
+		params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
+	}
+
+	/* We're trying to connect, so make sure params are at pend_le_conns */
+	if (params->auto_connect == HCI_AUTO_CONN_DISABLED ||
+	    params->auto_connect == HCI_AUTO_CONN_REPORT ||
+	    params->auto_connect == HCI_AUTO_CONN_EXPLICIT) {
+		list_del_init(&params->action);
+		list_add(&params->action, &hdev->pend_le_conns);
+	}
+
+	params->explicit_connect = true;
+
+	BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type,
+	       params->auto_connect);
+
+	return 0;
+}
+
+/* This function requires the caller holds hdev->lock */
+struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
+				     u8 dst_type, u8 sec_level,
+				     u16 conn_timeout,
+				     enum conn_reasons conn_reason)
+{
+	struct hci_conn *conn;
+
+	/* Let's make sure that le is enabled.*/
+	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
+		if (lmp_le_capable(hdev))
+			return ERR_PTR(-ECONNREFUSED);
+
+		return ERR_PTR(-EOPNOTSUPP);
+	}
+
+	/* Some devices send ATT messages as soon as the physical link is
+	 * established. To be able to handle these ATT messages, the user-
+	 * space first establishes the connection and then starts the pairing
+	 * process.
+	 *
+	 * So if a hci_conn object already exists for the following connection
+	 * attempt, we simply update pending_sec_level and auth_type fields
+	 * and return the object found.
+	 */
+	conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
+	if (conn) {
+		if (conn->pending_sec_level < sec_level)
+			conn->pending_sec_level = sec_level;
+		goto done;
+	}
+
+	BT_DBG("requesting refresh of dst_addr");
+
+	conn = hci_conn_add(hdev, LE_LINK, dst, HCI_ROLE_MASTER);
+	if (!conn)
+		return ERR_PTR(-ENOMEM);
+
+	if (hci_explicit_conn_params_set(hdev, dst, dst_type) < 0) {
+		hci_conn_del(conn);
+		return ERR_PTR(-EBUSY);
+	}
+
+	conn->state = BT_CONNECT;
+	set_bit(HCI_CONN_SCANNING, &conn->flags);
+	conn->dst_type = dst_type;
+	conn->sec_level = BT_SECURITY_LOW;
+	conn->pending_sec_level = sec_level;
+	conn->conn_timeout = conn_timeout;
+	conn->conn_reason = conn_reason;
+
+	hci_update_background_scan(hdev);
+
+done:
+	hci_conn_hold(conn);
+	return conn;
+}
+
+struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
+				 u8 sec_level, u8 auth_type,
+				 enum conn_reasons conn_reason)
+{
+	struct hci_conn *acl;
+
+	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
+		if (lmp_bredr_capable(hdev))
+			return ERR_PTR(-ECONNREFUSED);
+
+		return ERR_PTR(-EOPNOTSUPP);
+	}
+
+	/* Reject outgoing connection to device with same BD ADDR against
+	 * CVE-2020-26555
+	 */
+	if (!bacmp(&hdev->bdaddr, dst)) {
+		bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
+			   dst);
+		return ERR_PTR(-ECONNREFUSED);
+	}
+
+	acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
+	if (!acl) {
+		acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER);
+		if (!acl)
+			return ERR_PTR(-ENOMEM);
+	}
+
+	hci_conn_hold(acl);
+
+	acl->conn_reason = conn_reason;
+	if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
+		acl->sec_level = BT_SECURITY_LOW;
+		acl->pending_sec_level = sec_level;
+		acl->auth_type = auth_type;
+		hci_acl_create_connection(acl);
+	}
+
+	return acl;
+}
+
+struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
+				 __u16 setting)
+{
+	struct hci_conn *acl;
+	struct hci_conn *sco;
+
+	acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING,
+			      CONN_REASON_SCO_CONNECT);
+	if (IS_ERR(acl))
+		return acl;
+
+	sco = hci_conn_hash_lookup_ba(hdev, type, dst);
+	if (!sco) {
+		sco = hci_conn_add(hdev, type, dst, HCI_ROLE_MASTER);
+		if (!sco) {
+			hci_conn_drop(acl);
+			return ERR_PTR(-ENOMEM);
+		}
+	}
+
+	acl->link = sco;
+	sco->link = acl;
+
+	hci_conn_hold(sco);
+
+	sco->setting = setting;
+
+	if (acl->state == BT_CONNECTED &&
+	    (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
+		set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
+		hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
+
+		if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
+			/* defer SCO setup until mode change completed */
+			set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
+			return sco;
+		}
+
+		hci_sco_setup(acl, 0x00);
+	}
+
+	return sco;
+}
+
+/* Check link security requirement */
+int hci_conn_check_link_mode(struct hci_conn *conn)
+{
+	BT_DBG("hcon %p", conn);
+
+	/* In Secure Connections Only mode, it is required that Secure
+	 * Connections is used and the link is encrypted with AES-CCM
+	 * using a P-256 authenticated combination key.
+	 */
+	if (hci_dev_test_flag(conn->hdev, HCI_SC_ONLY)) {
+		if (!hci_conn_sc_enabled(conn) ||
+		    !test_bit(HCI_CONN_AES_CCM, &conn->flags) ||
+		    conn->key_type != HCI_LK_AUTH_COMBINATION_P256)
+			return 0;
+	}
+
+	 /* AES encryption is required for Level 4:
+	  *
+	  * BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 3, Part C
+	  * page 1319:
+	  *
+	  * 128-bit equivalent strength for link and encryption keys
+	  * required using FIPS approved algorithms (E0 not allowed,
+	  * SAFER+ not allowed, and P-192 not allowed; encryption key
+	  * not shortened)
+	  */
+	if (conn->sec_level == BT_SECURITY_FIPS &&
+	    !test_bit(HCI_CONN_AES_CCM, &conn->flags)) {
+		bt_dev_err(conn->hdev,
+			   "Invalid security: Missing AES-CCM usage");
+		return 0;
+	}
+
+	if (hci_conn_ssp_enabled(conn) &&
+	    !test_bit(HCI_CONN_ENCRYPT, &conn->flags))
+		return 0;
+
+	return 1;
+}
+
+/* Authenticate remote device */
+static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
+{
+	BT_DBG("hcon %p", conn);
+
+	if (conn->pending_sec_level > sec_level)
+		sec_level = conn->pending_sec_level;
+
+	if (sec_level > conn->sec_level)
+		conn->pending_sec_level = sec_level;
+	else if (test_bit(HCI_CONN_AUTH, &conn->flags))
+		return 1;
+
+	/* Make sure we preserve an existing MITM requirement*/
+	auth_type |= (conn->auth_type & 0x01);
+
+	conn->auth_type = auth_type;
+
+	if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
+		struct hci_cp_auth_requested cp;
+
+		cp.handle = cpu_to_le16(conn->handle);
+		hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
+			     sizeof(cp), &cp);
+
+		/* Set the ENCRYPT_PEND to trigger encryption after
+		 * authentication.
+		 */
+		if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
+			set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
+	}
+
+	return 0;
+}
+
+/* Encrypt the link */
+static void hci_conn_encrypt(struct hci_conn *conn)
+{
+	BT_DBG("hcon %p", conn);
+
+	if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
+		struct hci_cp_set_conn_encrypt cp;
+		cp.handle  = cpu_to_le16(conn->handle);
+		cp.encrypt = 0x01;
+		hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
+			     &cp);
+	}
+}
+
+/* Enable security */
+int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
+		      bool initiator)
+{
+	BT_DBG("hcon %p", conn);
+
+	if (conn->type == LE_LINK)
+		return smp_conn_security(conn, sec_level);
+
+	/* For sdp we don't need the link key. */
+	if (sec_level == BT_SECURITY_SDP)
+		return 1;
+
+	/* For non 2.1 devices and low security level we don't need the link
+	   key. */
+	if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
+		return 1;
+
+	/* For other security levels we need the link key. */
+	if (!test_bit(HCI_CONN_AUTH, &conn->flags))
+		goto auth;
+
+	switch (conn->key_type) {
+	case HCI_LK_AUTH_COMBINATION_P256:
+		/* An authenticated FIPS approved combination key has
+		 * sufficient security for security level 4 or lower.
+		 */
+		if (sec_level <= BT_SECURITY_FIPS)
+			goto encrypt;
+		break;
+	case HCI_LK_AUTH_COMBINATION_P192:
+		/* An authenticated combination key has sufficient security for
+		 * security level 3 or lower.
+		 */
+		if (sec_level <= BT_SECURITY_HIGH)
+			goto encrypt;
+		break;
+	case HCI_LK_UNAUTH_COMBINATION_P192:
+	case HCI_LK_UNAUTH_COMBINATION_P256:
+		/* An unauthenticated combination key has sufficient security
+		 * for security level 2 or lower.
+		 */
+		if (sec_level <= BT_SECURITY_MEDIUM)
+			goto encrypt;
+		break;
+	case HCI_LK_COMBINATION:
+		/* A combination key has always sufficient security for the
+		 * security levels 2 or lower. High security level requires the
+		 * combination key is generated using maximum PIN code length
+		 * (16). For pre 2.1 units.
+		 */
+		if (sec_level <= BT_SECURITY_MEDIUM || conn->pin_length == 16)
+			goto encrypt;
+		break;
+	default:
+		break;
+	}
+
+auth:
+	if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
+		return 0;
+
+	if (initiator)
+		set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
+
+	if (!hci_conn_auth(conn, sec_level, auth_type))
+		return 0;
+
+encrypt:
+	if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) {
+		/* Ensure that the encryption key size has been read,
+		 * otherwise stall the upper layer responses.
+		 */
+		if (!conn->enc_key_size)
+			return 0;
+
+		/* Nothing else needed, all requirements are met */
+		return 1;
+	}
+
+	hci_conn_encrypt(conn);
+	return 0;
+}
+EXPORT_SYMBOL(hci_conn_security);
+
+/* Check secure link requirement */
+int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
+{
+	BT_DBG("hcon %p", conn);
+
+	/* Accept if non-secure or higher security level is required */
+	if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS)
+		return 1;
+
+	/* Accept if secure or higher security level is already present */
+	if (conn->sec_level == BT_SECURITY_HIGH ||
+	    conn->sec_level == BT_SECURITY_FIPS)
+		return 1;
+
+	/* Reject not secure link */
+	return 0;
+}
+EXPORT_SYMBOL(hci_conn_check_secure);
+
+/* Switch role */
+int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
+{
+	BT_DBG("hcon %p", conn);
+
+	if (role == conn->role)
+		return 1;
+
+	if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
+		struct hci_cp_switch_role cp;
+		bacpy(&cp.bdaddr, &conn->dst);
+		cp.role = role;
+		hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(hci_conn_switch_role);
+
+/* Enter active mode */
+void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
+{
+	struct hci_dev *hdev = conn->hdev;
+
+	BT_DBG("hcon %p mode %d", conn, conn->mode);
+
+	if (conn->mode != HCI_CM_SNIFF)
+		goto timer;
+
+	if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
+		goto timer;
+
+	if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
+		struct hci_cp_exit_sniff_mode cp;
+		cp.handle = cpu_to_le16(conn->handle);
+		hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
+	}
+
+timer:
+	if (hdev->idle_timeout > 0)
+		queue_delayed_work(hdev->workqueue, &conn->idle_work,
+				   msecs_to_jiffies(hdev->idle_timeout));
+}
+
+/* Drop all connection on the device */
+void hci_conn_hash_flush(struct hci_dev *hdev)
+{
+	struct hci_conn_hash *h = &hdev->conn_hash;
+	struct hci_conn *c, *n;
+
+	BT_DBG("hdev %s", hdev->name);
+
+	list_for_each_entry_safe(c, n, &h->list, list) {
+		c->state = BT_CLOSED;
+
+		hci_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
+		hci_conn_del(c);
+	}
+}
+
+/* Check pending connect attempts */
+void hci_conn_check_pending(struct hci_dev *hdev)
+{
+	struct hci_conn *conn;
+
+	BT_DBG("hdev %s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
+	if (conn)
+		hci_acl_create_connection(conn);
+
+	hci_dev_unlock(hdev);
+}
+
+static u32 get_link_mode(struct hci_conn *conn)
+{
+	u32 link_mode = 0;
+
+	if (conn->role == HCI_ROLE_MASTER)
+		link_mode |= HCI_LM_MASTER;
+
+	if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
+		link_mode |= HCI_LM_ENCRYPT;
+
+	if (test_bit(HCI_CONN_AUTH, &conn->flags))
+		link_mode |= HCI_LM_AUTH;
+
+	if (test_bit(HCI_CONN_SECURE, &conn->flags))
+		link_mode |= HCI_LM_SECURE;
+
+	if (test_bit(HCI_CONN_FIPS, &conn->flags))
+		link_mode |= HCI_LM_FIPS;
+
+	return link_mode;
+}
+
+int hci_get_conn_list(void __user *arg)
+{
+	struct hci_conn *c;
+	struct hci_conn_list_req req, *cl;
+	struct hci_conn_info *ci;
+	struct hci_dev *hdev;
+	int n = 0, size, err;
+
+	if (copy_from_user(&req, arg, sizeof(req)))
+		return -EFAULT;
+
+	if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
+		return -EINVAL;
+
+	size = sizeof(req) + req.conn_num * sizeof(*ci);
+
+	cl = kmalloc(size, GFP_KERNEL);
+	if (!cl)
+		return -ENOMEM;
+
+	hdev = hci_dev_get(req.dev_id);
+	if (!hdev) {
+		kfree(cl);
+		return -ENODEV;
+	}
+
+	ci = cl->conn_info;
+
+	hci_dev_lock(hdev);
+	list_for_each_entry(c, &hdev->conn_hash.list, list) {
+		bacpy(&(ci + n)->bdaddr, &c->dst);
+		(ci + n)->handle = c->handle;
+		(ci + n)->type  = c->type;
+		(ci + n)->out   = c->out;
+		(ci + n)->state = c->state;
+		(ci + n)->link_mode = get_link_mode(c);
+		if (++n >= req.conn_num)
+			break;
+	}
+	hci_dev_unlock(hdev);
+
+	cl->dev_id = hdev->id;
+	cl->conn_num = n;
+	size = sizeof(req) + n * sizeof(*ci);
+
+	hci_dev_put(hdev);
+
+	err = copy_to_user(arg, cl, size);
+	kfree(cl);
+
+	return err ? -EFAULT : 0;
+}
+
+int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
+{
+	struct hci_conn_info_req req;
+	struct hci_conn_info ci;
+	struct hci_conn *conn;
+	char __user *ptr = arg + sizeof(req);
+
+	if (copy_from_user(&req, arg, sizeof(req)))
+		return -EFAULT;
+
+	hci_dev_lock(hdev);
+	conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
+	if (conn) {
+		bacpy(&ci.bdaddr, &conn->dst);
+		ci.handle = conn->handle;
+		ci.type  = conn->type;
+		ci.out   = conn->out;
+		ci.state = conn->state;
+		ci.link_mode = get_link_mode(conn);
+	}
+	hci_dev_unlock(hdev);
+
+	if (!conn)
+		return -ENOENT;
+
+	return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
+}
+
+int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
+{
+	struct hci_auth_info_req req;
+	struct hci_conn *conn;
+
+	if (copy_from_user(&req, arg, sizeof(req)))
+		return -EFAULT;
+
+	hci_dev_lock(hdev);
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
+	if (conn)
+		req.type = conn->auth_type;
+	hci_dev_unlock(hdev);
+
+	if (!conn)
+		return -ENOENT;
+
+	return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
+}
+
+struct hci_chan *hci_chan_create(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct hci_chan *chan;
+
+	BT_DBG("%s hcon %p", hdev->name, conn);
+
+	if (test_bit(HCI_CONN_DROP, &conn->flags)) {
+		BT_DBG("Refusing to create new hci_chan");
+		return NULL;
+	}
+
+	chan = kzalloc(sizeof(*chan), GFP_KERNEL);
+	if (!chan)
+		return NULL;
+
+	chan->conn = hci_conn_get(conn);
+	skb_queue_head_init(&chan->data_q);
+	chan->state = BT_CONNECTED;
+
+	list_add_rcu(&chan->list, &conn->chan_list);
+
+	return chan;
+}
+
+void hci_chan_del(struct hci_chan *chan)
+{
+	struct hci_conn *conn = chan->conn;
+	struct hci_dev *hdev = conn->hdev;
+
+	BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);
+
+	list_del_rcu(&chan->list);
+
+	synchronize_rcu();
+
+	/* Prevent new hci_chan's to be created for this hci_conn */
+	set_bit(HCI_CONN_DROP, &conn->flags);
+
+	hci_conn_put(conn);
+
+	skb_queue_purge(&chan->data_q);
+	kfree(chan);
+}
+
+void hci_chan_list_flush(struct hci_conn *conn)
+{
+	struct hci_chan *chan, *n;
+
+	BT_DBG("hcon %p", conn);
+
+	list_for_each_entry_safe(chan, n, &conn->chan_list, list)
+		hci_chan_del(chan);
+}
+
+static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon,
+						 __u16 handle)
+{
+	struct hci_chan *hchan;
+
+	list_for_each_entry(hchan, &hcon->chan_list, list) {
+		if (hchan->handle == handle)
+			return hchan;
+	}
+
+	return NULL;
+}
+
+struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
+{
+	struct hci_conn_hash *h = &hdev->conn_hash;
+	struct hci_conn *hcon;
+	struct hci_chan *hchan = NULL;
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(hcon, &h->list, list) {
+		hchan = __hci_chan_lookup_handle(hcon, handle);
+		if (hchan)
+			break;
+	}
+
+	rcu_read_unlock();
+
+	return hchan;
+}
+
+u32 hci_conn_get_phy(struct hci_conn *conn)
+{
+	u32 phys = 0;
+
+	/* BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 2, Part B page 471:
+	 * Table 6.2: Packets defined for synchronous, asynchronous, and
+	 * CSB logical transport types.
+	 */
+	switch (conn->type) {
+	case SCO_LINK:
+		/* SCO logical transport (1 Mb/s):
+		 * HV1, HV2, HV3 and DV.
+		 */
+		phys |= BT_PHY_BR_1M_1SLOT;
+
+		break;
+
+	case ACL_LINK:
+		/* ACL logical transport (1 Mb/s) ptt=0:
+		 * DH1, DM3, DH3, DM5 and DH5.
+		 */
+		phys |= BT_PHY_BR_1M_1SLOT;
+
+		if (conn->pkt_type & (HCI_DM3 | HCI_DH3))
+			phys |= BT_PHY_BR_1M_3SLOT;
+
+		if (conn->pkt_type & (HCI_DM5 | HCI_DH5))
+			phys |= BT_PHY_BR_1M_5SLOT;
+
+		/* ACL logical transport (2 Mb/s) ptt=1:
+		 * 2-DH1, 2-DH3 and 2-DH5.
+		 */
+		if (!(conn->pkt_type & HCI_2DH1))
+			phys |= BT_PHY_EDR_2M_1SLOT;
+
+		if (!(conn->pkt_type & HCI_2DH3))
+			phys |= BT_PHY_EDR_2M_3SLOT;
+
+		if (!(conn->pkt_type & HCI_2DH5))
+			phys |= BT_PHY_EDR_2M_5SLOT;
+
+		/* ACL logical transport (3 Mb/s) ptt=1:
+		 * 3-DH1, 3-DH3 and 3-DH5.
+		 */
+		if (!(conn->pkt_type & HCI_3DH1))
+			phys |= BT_PHY_EDR_3M_1SLOT;
+
+		if (!(conn->pkt_type & HCI_3DH3))
+			phys |= BT_PHY_EDR_3M_3SLOT;
+
+		if (!(conn->pkt_type & HCI_3DH5))
+			phys |= BT_PHY_EDR_3M_5SLOT;
+
+		break;
+
+	case ESCO_LINK:
+		/* eSCO logical transport (1 Mb/s): EV3, EV4 and EV5 */
+		phys |= BT_PHY_BR_1M_1SLOT;
+
+		if (!(conn->pkt_type & (ESCO_EV4 | ESCO_EV5)))
+			phys |= BT_PHY_BR_1M_3SLOT;
+
+		/* eSCO logical transport (2 Mb/s): 2-EV3, 2-EV5 */
+		if (!(conn->pkt_type & ESCO_2EV3))
+			phys |= BT_PHY_EDR_2M_1SLOT;
+
+		if (!(conn->pkt_type & ESCO_2EV5))
+			phys |= BT_PHY_EDR_2M_3SLOT;
+
+		/* eSCO logical transport (3 Mb/s): 3-EV3, 3-EV5 */
+		if (!(conn->pkt_type & ESCO_3EV3))
+			phys |= BT_PHY_EDR_3M_1SLOT;
+
+		if (!(conn->pkt_type & ESCO_3EV5))
+			phys |= BT_PHY_EDR_3M_3SLOT;
+
+		break;
+
+	case LE_LINK:
+		if (conn->le_tx_phy & HCI_LE_SET_PHY_1M)
+			phys |= BT_PHY_LE_1M_TX;
+
+		if (conn->le_rx_phy & HCI_LE_SET_PHY_1M)
+			phys |= BT_PHY_LE_1M_RX;
+
+		if (conn->le_tx_phy & HCI_LE_SET_PHY_2M)
+			phys |= BT_PHY_LE_2M_TX;
+
+		if (conn->le_rx_phy & HCI_LE_SET_PHY_2M)
+			phys |= BT_PHY_LE_2M_RX;
+
+		if (conn->le_tx_phy & HCI_LE_SET_PHY_CODED)
+			phys |= BT_PHY_LE_CODED_TX;
+
+		if (conn->le_rx_phy & HCI_LE_SET_PHY_CODED)
+			phys |= BT_PHY_LE_CODED_RX;
+
+		break;
+	}
+
+	return phys;
+}
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
new file mode 100644
index 000000000..e33fe4b1c
--- /dev/null
+++ b/net/bluetooth/hci_core.c
@@ -0,0 +1,5016 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2000-2001 Qualcomm Incorporated
+   Copyright (C) 2011 ProFUSION Embedded Systems
+
+   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth HCI core. */
+
+#include <linux/export.h>
+#include <linux/rfkill.h>
+#include <linux/debugfs.h>
+#include <linux/crypto.h>
+#include <linux/property.h>
+#include <linux/suspend.h>
+#include <linux/wait.h>
+#include <asm/unaligned.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/l2cap.h>
+#include <net/bluetooth/mgmt.h>
+
+#include "hci_request.h"
+#include "hci_debugfs.h"
+#include "smp.h"
+#include "leds.h"
+#include "msft.h"
+
+static void hci_rx_work(struct work_struct *work);
+static void hci_cmd_work(struct work_struct *work);
+static void hci_tx_work(struct work_struct *work);
+
+/* HCI device list */
+LIST_HEAD(hci_dev_list);
+DEFINE_RWLOCK(hci_dev_list_lock);
+
+/* HCI callback list */
+LIST_HEAD(hci_cb_list);
+DEFINE_MUTEX(hci_cb_list_lock);
+
+/* HCI ID Numbering */
+static DEFINE_IDA(hci_index_ida);
+
+/* ---- HCI debugfs entries ---- */
+
+static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
+			     size_t count, loff_t *ppos)
+{
+	struct hci_dev *hdev = file->private_data;
+	char buf[3];
+
+	buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y' : 'N';
+	buf[1] = '\n';
+	buf[2] = '\0';
+	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+}
+
+static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
+			      size_t count, loff_t *ppos)
+{
+	struct hci_dev *hdev = file->private_data;
+	struct sk_buff *skb;
+	bool enable;
+	int err;
+
+	if (!test_bit(HCI_UP, &hdev->flags))
+		return -ENETDOWN;
+
+	err = kstrtobool_from_user(user_buf, count, &enable);
+	if (err)
+		return err;
+
+	if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
+		return -EALREADY;
+
+	hci_req_sync_lock(hdev);
+	if (enable)
+		skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
+				     HCI_CMD_TIMEOUT);
+	else
+		skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
+				     HCI_CMD_TIMEOUT);
+	hci_req_sync_unlock(hdev);
+
+	if (IS_ERR(skb))
+		return PTR_ERR(skb);
+
+	kfree_skb(skb);
+
+	hci_dev_change_flag(hdev, HCI_DUT_MODE);
+
+	return count;
+}
+
+static const struct file_operations dut_mode_fops = {
+	.open		= simple_open,
+	.read		= dut_mode_read,
+	.write		= dut_mode_write,
+	.llseek		= default_llseek,
+};
+
+static ssize_t vendor_diag_read(struct file *file, char __user *user_buf,
+				size_t count, loff_t *ppos)
+{
+	struct hci_dev *hdev = file->private_data;
+	char buf[3];
+
+	buf[0] = hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) ? 'Y' : 'N';
+	buf[1] = '\n';
+	buf[2] = '\0';
+	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+}
+
+static ssize_t vendor_diag_write(struct file *file, const char __user *user_buf,
+				 size_t count, loff_t *ppos)
+{
+	struct hci_dev *hdev = file->private_data;
+	bool enable;
+	int err;
+
+	err = kstrtobool_from_user(user_buf, count, &enable);
+	if (err)
+		return err;
+
+	/* When the diagnostic flags are not persistent and the transport
+	 * is not active or in user channel operation, then there is no need
+	 * for the vendor callback. Instead just store the desired value and
+	 * the setting will be programmed when the controller gets powered on.
+	 */
+	if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
+	    (!test_bit(HCI_RUNNING, &hdev->flags) ||
+	     hci_dev_test_flag(hdev, HCI_USER_CHANNEL)))
+		goto done;
+
+	hci_req_sync_lock(hdev);
+	err = hdev->set_diag(hdev, enable);
+	hci_req_sync_unlock(hdev);
+
+	if (err < 0)
+		return err;
+
+done:
+	if (enable)
+		hci_dev_set_flag(hdev, HCI_VENDOR_DIAG);
+	else
+		hci_dev_clear_flag(hdev, HCI_VENDOR_DIAG);
+
+	return count;
+}
+
+static const struct file_operations vendor_diag_fops = {
+	.open		= simple_open,
+	.read		= vendor_diag_read,
+	.write		= vendor_diag_write,
+	.llseek		= default_llseek,
+};
+
+static void hci_debugfs_create_basic(struct hci_dev *hdev)
+{
+	debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
+			    &dut_mode_fops);
+
+	if (hdev->set_diag)
+		debugfs_create_file("vendor_diag", 0644, hdev->debugfs, hdev,
+				    &vendor_diag_fops);
+}
+
+static int hci_reset_req(struct hci_request *req, unsigned long opt)
+{
+	BT_DBG("%s %ld", req->hdev->name, opt);
+
+	/* Reset device */
+	set_bit(HCI_RESET, &req->hdev->flags);
+	hci_req_add(req, HCI_OP_RESET, 0, NULL);
+	return 0;
+}
+
+static void bredr_init(struct hci_request *req)
+{
+	req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
+
+	/* Read Local Supported Features */
+	hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
+
+	/* Read Local Version */
+	hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
+
+	/* Read BD Address */
+	hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
+}
+
+static void amp_init1(struct hci_request *req)
+{
+	req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
+
+	/* Read Local Version */
+	hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
+
+	/* Read Local Supported Commands */
+	hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
+
+	/* Read Local AMP Info */
+	hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
+
+	/* Read Data Blk size */
+	hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
+
+	/* Read Flow Control Mode */
+	hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
+
+	/* Read Location Data */
+	hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
+}
+
+static int amp_init2(struct hci_request *req)
+{
+	/* Read Local Supported Features. Not all AMP controllers
+	 * support this so it's placed conditionally in the second
+	 * stage init.
+	 */
+	if (req->hdev->commands[14] & 0x20)
+		hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
+
+	return 0;
+}
+
+static int hci_init1_req(struct hci_request *req, unsigned long opt)
+{
+	struct hci_dev *hdev = req->hdev;
+
+	BT_DBG("%s %ld", hdev->name, opt);
+
+	/* Reset */
+	if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
+		hci_reset_req(req, 0);
+
+	switch (hdev->dev_type) {
+	case HCI_PRIMARY:
+		bredr_init(req);
+		break;
+	case HCI_AMP:
+		amp_init1(req);
+		break;
+	default:
+		bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type);
+		break;
+	}
+
+	return 0;
+}
+
+static void bredr_setup(struct hci_request *req)
+{
+	__le16 param;
+	__u8 flt_type;
+
+	/* Read Buffer Size (ACL mtu, max pkt, etc.) */
+	hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
+
+	/* Read Class of Device */
+	hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
+
+	/* Read Local Name */
+	hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
+
+	/* Read Voice Setting */
+	hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
+
+	/* Read Number of Supported IAC */
+	hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
+
+	/* Read Current IAC LAP */
+	hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
+
+	/* Clear Event Filters */
+	flt_type = HCI_FLT_CLEAR_ALL;
+	hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
+
+	/* Connection accept timeout ~20 secs */
+	param = cpu_to_le16(0x7d00);
+	hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
+}
+
+static void le_setup(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+
+	/* Read LE Buffer Size */
+	hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
+
+	/* Read LE Local Supported Features */
+	hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
+
+	/* Read LE Supported States */
+	hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
+
+	/* LE-only controllers have LE implicitly enabled */
+	if (!lmp_bredr_capable(hdev))
+		hci_dev_set_flag(hdev, HCI_LE_ENABLED);
+}
+
+static void hci_setup_event_mask(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+
+	/* The second byte is 0xff instead of 0x9f (two reserved bits
+	 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
+	 * command otherwise.
+	 */
+	u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
+
+	/* CSR 1.1 dongles does not accept any bitfield so don't try to set
+	 * any event mask for pre 1.2 devices.
+	 */
+	if (hdev->hci_ver < BLUETOOTH_VER_1_2)
+		return;
+
+	if (lmp_bredr_capable(hdev)) {
+		events[4] |= 0x01; /* Flow Specification Complete */
+	} else {
+		/* Use a different default for LE-only devices */
+		memset(events, 0, sizeof(events));
+		events[1] |= 0x20; /* Command Complete */
+		events[1] |= 0x40; /* Command Status */
+		events[1] |= 0x80; /* Hardware Error */
+
+		/* If the controller supports the Disconnect command, enable
+		 * the corresponding event. In addition enable packet flow
+		 * control related events.
+		 */
+		if (hdev->commands[0] & 0x20) {
+			events[0] |= 0x10; /* Disconnection Complete */
+			events[2] |= 0x04; /* Number of Completed Packets */
+			events[3] |= 0x02; /* Data Buffer Overflow */
+		}
+
+		/* If the controller supports the Read Remote Version
+		 * Information command, enable the corresponding event.
+		 */
+		if (hdev->commands[2] & 0x80)
+			events[1] |= 0x08; /* Read Remote Version Information
+					    * Complete
+					    */
+
+		if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
+			events[0] |= 0x80; /* Encryption Change */
+			events[5] |= 0x80; /* Encryption Key Refresh Complete */
+		}
+	}
+
+	if (lmp_inq_rssi_capable(hdev) ||
+	    test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
+		events[4] |= 0x02; /* Inquiry Result with RSSI */
+
+	if (lmp_ext_feat_capable(hdev))
+		events[4] |= 0x04; /* Read Remote Extended Features Complete */
+
+	if (lmp_esco_capable(hdev)) {
+		events[5] |= 0x08; /* Synchronous Connection Complete */
+		events[5] |= 0x10; /* Synchronous Connection Changed */
+	}
+
+	if (lmp_sniffsubr_capable(hdev))
+		events[5] |= 0x20; /* Sniff Subrating */
+
+	if (lmp_pause_enc_capable(hdev))
+		events[5] |= 0x80; /* Encryption Key Refresh Complete */
+
+	if (lmp_ext_inq_capable(hdev))
+		events[5] |= 0x40; /* Extended Inquiry Result */
+
+	if (lmp_no_flush_capable(hdev))
+		events[7] |= 0x01; /* Enhanced Flush Complete */
+
+	if (lmp_lsto_capable(hdev))
+		events[6] |= 0x80; /* Link Supervision Timeout Changed */
+
+	if (lmp_ssp_capable(hdev)) {
+		events[6] |= 0x01;	/* IO Capability Request */
+		events[6] |= 0x02;	/* IO Capability Response */
+		events[6] |= 0x04;	/* User Confirmation Request */
+		events[6] |= 0x08;	/* User Passkey Request */
+		events[6] |= 0x10;	/* Remote OOB Data Request */
+		events[6] |= 0x20;	/* Simple Pairing Complete */
+		events[7] |= 0x04;	/* User Passkey Notification */
+		events[7] |= 0x08;	/* Keypress Notification */
+		events[7] |= 0x10;	/* Remote Host Supported
+					 * Features Notification
+					 */
+	}
+
+	if (lmp_le_capable(hdev))
+		events[7] |= 0x20;	/* LE Meta-Event */
+
+	hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
+}
+
+static int hci_init2_req(struct hci_request *req, unsigned long opt)
+{
+	struct hci_dev *hdev = req->hdev;
+
+	if (hdev->dev_type == HCI_AMP)
+		return amp_init2(req);
+
+	if (lmp_bredr_capable(hdev))
+		bredr_setup(req);
+	else
+		hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
+
+	if (lmp_le_capable(hdev))
+		le_setup(req);
+
+	/* All Bluetooth 1.2 and later controllers should support the
+	 * HCI command for reading the local supported commands.
+	 *
+	 * Unfortunately some controllers indicate Bluetooth 1.2 support,
+	 * but do not have support for this command. If that is the case,
+	 * the driver can quirk the behavior and skip reading the local
+	 * supported commands.
+	 */
+	if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
+	    !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
+		hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
+
+	if (lmp_ssp_capable(hdev)) {
+		/* When SSP is available, then the host features page
+		 * should also be available as well. However some
+		 * controllers list the max_page as 0 as long as SSP
+		 * has not been enabled. To achieve proper debugging
+		 * output, force the minimum max_page to 1 at least.
+		 */
+		hdev->max_page = 0x01;
+
+		if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
+			u8 mode = 0x01;
+
+			hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
+				    sizeof(mode), &mode);
+		} else {
+			struct hci_cp_write_eir cp;
+
+			memset(hdev->eir, 0, sizeof(hdev->eir));
+			memset(&cp, 0, sizeof(cp));
+
+			hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
+		}
+	}
+
+	if (lmp_inq_rssi_capable(hdev) ||
+	    test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
+		u8 mode;
+
+		/* If Extended Inquiry Result events are supported, then
+		 * they are clearly preferred over Inquiry Result with RSSI
+		 * events.
+		 */
+		mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
+
+		hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
+	}
+
+	if (lmp_inq_tx_pwr_capable(hdev))
+		hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
+
+	if (lmp_ext_feat_capable(hdev)) {
+		struct hci_cp_read_local_ext_features cp;
+
+		cp.page = 0x01;
+		hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
+			    sizeof(cp), &cp);
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
+		u8 enable = 1;
+		hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
+			    &enable);
+	}
+
+	return 0;
+}
+
+static void hci_setup_link_policy(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct hci_cp_write_def_link_policy cp;
+	u16 link_policy = 0;
+
+	if (lmp_rswitch_capable(hdev))
+		link_policy |= HCI_LP_RSWITCH;
+	if (lmp_hold_capable(hdev))
+		link_policy |= HCI_LP_HOLD;
+	if (lmp_sniff_capable(hdev))
+		link_policy |= HCI_LP_SNIFF;
+	if (lmp_park_capable(hdev))
+		link_policy |= HCI_LP_PARK;
+
+	cp.policy = cpu_to_le16(link_policy);
+	hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
+}
+
+static void hci_set_le_support(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct hci_cp_write_le_host_supported cp;
+
+	/* LE-only devices do not support explicit enablement */
+	if (!lmp_bredr_capable(hdev))
+		return;
+
+	memset(&cp, 0, sizeof(cp));
+
+	if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
+		cp.le = 0x01;
+		cp.simul = 0x00;
+	}
+
+	if (cp.le != lmp_host_le_capable(hdev))
+		hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
+			    &cp);
+}
+
+static void hci_set_event_mask_page_2(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+	u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+	bool changed = false;
+
+	/* If Connectionless Slave Broadcast master role is supported
+	 * enable all necessary events for it.
+	 */
+	if (lmp_csb_master_capable(hdev)) {
+		events[1] |= 0x40;	/* Triggered Clock Capture */
+		events[1] |= 0x80;	/* Synchronization Train Complete */
+		events[2] |= 0x10;	/* Slave Page Response Timeout */
+		events[2] |= 0x20;	/* CSB Channel Map Change */
+		changed = true;
+	}
+
+	/* If Connectionless Slave Broadcast slave role is supported
+	 * enable all necessary events for it.
+	 */
+	if (lmp_csb_slave_capable(hdev)) {
+		events[2] |= 0x01;	/* Synchronization Train Received */
+		events[2] |= 0x02;	/* CSB Receive */
+		events[2] |= 0x04;	/* CSB Timeout */
+		events[2] |= 0x08;	/* Truncated Page Complete */
+		changed = true;
+	}
+
+	/* Enable Authenticated Payload Timeout Expired event if supported */
+	if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
+		events[2] |= 0x80;
+		changed = true;
+	}
+
+	/* Some Broadcom based controllers indicate support for Set Event
+	 * Mask Page 2 command, but then actually do not support it. Since
+	 * the default value is all bits set to zero, the command is only
+	 * required if the event mask has to be changed. In case no change
+	 * to the event mask is needed, skip this command.
+	 */
+	if (changed)
+		hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2,
+			    sizeof(events), events);
+}
+
+static int hci_init3_req(struct hci_request *req, unsigned long opt)
+{
+	struct hci_dev *hdev = req->hdev;
+	u8 p;
+
+	hci_setup_event_mask(req);
+
+	if (hdev->commands[6] & 0x20 &&
+	    !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
+		struct hci_cp_read_stored_link_key cp;
+
+		bacpy(&cp.bdaddr, BDADDR_ANY);
+		cp.read_all = 0x01;
+		hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
+	}
+
+	if (hdev->commands[5] & 0x10)
+		hci_setup_link_policy(req);
+
+	if (hdev->commands[8] & 0x01)
+		hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
+
+	if (hdev->commands[18] & 0x04 &&
+	    !test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
+		hci_req_add(req, HCI_OP_READ_DEF_ERR_DATA_REPORTING, 0, NULL);
+
+	/* Some older Broadcom based Bluetooth 1.2 controllers do not
+	 * support the Read Page Scan Type command. Check support for
+	 * this command in the bit mask of supported commands.
+	 */
+	if (hdev->commands[13] & 0x01)
+		hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
+
+	if (lmp_le_capable(hdev)) {
+		u8 events[8];
+
+		memset(events, 0, sizeof(events));
+
+		if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
+			events[0] |= 0x10;	/* LE Long Term Key Request */
+
+		/* If controller supports the Connection Parameters Request
+		 * Link Layer Procedure, enable the corresponding event.
+		 */
+		if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
+			events[0] |= 0x20;	/* LE Remote Connection
+						 * Parameter Request
+						 */
+
+		/* If the controller supports the Data Length Extension
+		 * feature, enable the corresponding event.
+		 */
+		if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
+			events[0] |= 0x40;	/* LE Data Length Change */
+
+		/* If the controller supports LL Privacy feature, enable
+		 * the corresponding event.
+		 */
+		if (hdev->le_features[0] & HCI_LE_LL_PRIVACY)
+			events[1] |= 0x02;	/* LE Enhanced Connection
+						 * Complete
+						 */
+
+		/* If the controller supports Extended Scanner Filter
+		 * Policies, enable the correspondig event.
+		 */
+		if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
+			events[1] |= 0x04;	/* LE Direct Advertising
+						 * Report
+						 */
+
+		/* If the controller supports Channel Selection Algorithm #2
+		 * feature, enable the corresponding event.
+		 */
+		if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
+			events[2] |= 0x08;	/* LE Channel Selection
+						 * Algorithm
+						 */
+
+		/* If the controller supports the LE Set Scan Enable command,
+		 * enable the corresponding advertising report event.
+		 */
+		if (hdev->commands[26] & 0x08)
+			events[0] |= 0x02;	/* LE Advertising Report */
+
+		/* If the controller supports the LE Create Connection
+		 * command, enable the corresponding event.
+		 */
+		if (hdev->commands[26] & 0x10)
+			events[0] |= 0x01;	/* LE Connection Complete */
+
+		/* If the controller supports the LE Connection Update
+		 * command, enable the corresponding event.
+		 */
+		if (hdev->commands[27] & 0x04)
+			events[0] |= 0x04;	/* LE Connection Update
+						 * Complete
+						 */
+
+		/* If the controller supports the LE Read Remote Used Features
+		 * command, enable the corresponding event.
+		 */
+		if (hdev->commands[27] & 0x20)
+			events[0] |= 0x08;	/* LE Read Remote Used
+						 * Features Complete
+						 */
+
+		/* If the controller supports the LE Read Local P-256
+		 * Public Key command, enable the corresponding event.
+		 */
+		if (hdev->commands[34] & 0x02)
+			events[0] |= 0x80;	/* LE Read Local P-256
+						 * Public Key Complete
+						 */
+
+		/* If the controller supports the LE Generate DHKey
+		 * command, enable the corresponding event.
+		 */
+		if (hdev->commands[34] & 0x04)
+			events[1] |= 0x01;	/* LE Generate DHKey Complete */
+
+		/* If the controller supports the LE Set Default PHY or
+		 * LE Set PHY commands, enable the corresponding event.
+		 */
+		if (hdev->commands[35] & (0x20 | 0x40))
+			events[1] |= 0x08;        /* LE PHY Update Complete */
+
+		/* If the controller supports LE Set Extended Scan Parameters
+		 * and LE Set Extended Scan Enable commands, enable the
+		 * corresponding event.
+		 */
+		if (use_ext_scan(hdev))
+			events[1] |= 0x10;	/* LE Extended Advertising
+						 * Report
+						 */
+
+		/* If the controller supports the LE Extended Advertising
+		 * command, enable the corresponding event.
+		 */
+		if (ext_adv_capable(hdev))
+			events[2] |= 0x02;	/* LE Advertising Set
+						 * Terminated
+						 */
+
+		hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
+			    events);
+
+		/* Read LE Advertising Channel TX Power */
+		if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
+			/* HCI TS spec forbids mixing of legacy and extended
+			 * advertising commands wherein READ_ADV_TX_POWER is
+			 * also included. So do not call it if extended adv
+			 * is supported otherwise controller will return
+			 * COMMAND_DISALLOWED for extended commands.
+			 */
+			hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
+		}
+
+		if (hdev->commands[26] & 0x40) {
+			/* Read LE Accept List Size */
+			hci_req_add(req, HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
+				    0, NULL);
+		}
+
+		if (hdev->commands[26] & 0x80) {
+			/* Clear LE Accept List */
+			hci_req_add(req, HCI_OP_LE_CLEAR_ACCEPT_LIST, 0, NULL);
+		}
+
+		if (hdev->commands[34] & 0x40) {
+			/* Read LE Resolving List Size */
+			hci_req_add(req, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
+				    0, NULL);
+		}
+
+		if (hdev->commands[34] & 0x20) {
+			/* Clear LE Resolving List */
+			hci_req_add(req, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL);
+		}
+
+		if (hdev->commands[35] & 0x04) {
+			__le16 rpa_timeout = cpu_to_le16(hdev->rpa_timeout);
+
+			/* Set RPA timeout */
+			hci_req_add(req, HCI_OP_LE_SET_RPA_TIMEOUT, 2,
+				    &rpa_timeout);
+		}
+
+		if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
+			/* Read LE Maximum Data Length */
+			hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
+
+			/* Read LE Suggested Default Data Length */
+			hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
+		}
+
+		if (ext_adv_capable(hdev)) {
+			/* Read LE Number of Supported Advertising Sets */
+			hci_req_add(req, HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
+				    0, NULL);
+		}
+
+		hci_set_le_support(req);
+	}
+
+	/* Read features beyond page 1 if available */
+	for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
+		struct hci_cp_read_local_ext_features cp;
+
+		cp.page = p;
+		hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
+			    sizeof(cp), &cp);
+	}
+
+	return 0;
+}
+
+static int hci_init4_req(struct hci_request *req, unsigned long opt)
+{
+	struct hci_dev *hdev = req->hdev;
+
+	/* Some Broadcom based Bluetooth controllers do not support the
+	 * Delete Stored Link Key command. They are clearly indicating its
+	 * absence in the bit mask of supported commands.
+	 *
+	 * Check the supported commands and only if the command is marked
+	 * as supported send it. If not supported assume that the controller
+	 * does not have actual support for stored link keys which makes this
+	 * command redundant anyway.
+	 *
+	 * Some controllers indicate that they support handling deleting
+	 * stored link keys, but they don't. The quirk lets a driver
+	 * just disable this command.
+	 */
+	if (hdev->commands[6] & 0x80 &&
+	    !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
+		struct hci_cp_delete_stored_link_key cp;
+
+		bacpy(&cp.bdaddr, BDADDR_ANY);
+		cp.delete_all = 0x01;
+		hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
+			    sizeof(cp), &cp);
+	}
+
+	/* Set event mask page 2 if the HCI command for it is supported */
+	if (hdev->commands[22] & 0x04)
+		hci_set_event_mask_page_2(req);
+
+	/* Read local codec list if the HCI command is supported */
+	if (hdev->commands[29] & 0x20)
+		hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
+
+	/* Read local pairing options if the HCI command is supported */
+	if (hdev->commands[41] & 0x08)
+		hci_req_add(req, HCI_OP_READ_LOCAL_PAIRING_OPTS, 0, NULL);
+
+	/* Get MWS transport configuration if the HCI command is supported */
+	if (hdev->commands[30] & 0x08)
+		hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
+
+	/* Check for Synchronization Train support */
+	if (lmp_sync_train_capable(hdev))
+		hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
+
+	/* Enable Secure Connections if supported and configured */
+	if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
+	    bredr_sc_enabled(hdev)) {
+		u8 support = 0x01;
+
+		hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
+			    sizeof(support), &support);
+	}
+
+	/* Set erroneous data reporting if supported to the wideband speech
+	 * setting value
+	 */
+	if (hdev->commands[18] & 0x08 &&
+	    !test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks)) {
+		bool enabled = hci_dev_test_flag(hdev,
+						 HCI_WIDEBAND_SPEECH_ENABLED);
+
+		if (enabled !=
+		    (hdev->err_data_reporting == ERR_DATA_REPORTING_ENABLED)) {
+			struct hci_cp_write_def_err_data_reporting cp;
+
+			cp.err_data_reporting = enabled ?
+						ERR_DATA_REPORTING_ENABLED :
+						ERR_DATA_REPORTING_DISABLED;
+
+			hci_req_add(req, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
+				    sizeof(cp), &cp);
+		}
+	}
+
+	/* Set Suggested Default Data Length to maximum if supported */
+	if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
+		struct hci_cp_le_write_def_data_len cp;
+
+		cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
+		cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
+		hci_req_add(req, HCI_OP_LE_WRITE_DEF_DATA_LEN, sizeof(cp), &cp);
+	}
+
+	/* Set Default PHY parameters if command is supported */
+	if (hdev->commands[35] & 0x20) {
+		struct hci_cp_le_set_default_phy cp;
+
+		cp.all_phys = 0x00;
+		cp.tx_phys = hdev->le_tx_def_phys;
+		cp.rx_phys = hdev->le_rx_def_phys;
+
+		hci_req_add(req, HCI_OP_LE_SET_DEFAULT_PHY, sizeof(cp), &cp);
+	}
+
+	return 0;
+}
+
+static int __hci_init(struct hci_dev *hdev)
+{
+	int err;
+
+	err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT, NULL);
+	if (err < 0)
+		return err;
+
+	if (hci_dev_test_flag(hdev, HCI_SETUP))
+		hci_debugfs_create_basic(hdev);
+
+	err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT, NULL);
+	if (err < 0)
+		return err;
+
+	/* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
+	 * BR/EDR/LE type controllers. AMP controllers only need the
+	 * first two stages of init.
+	 */
+	if (hdev->dev_type != HCI_PRIMARY)
+		return 0;
+
+	err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT, NULL);
+	if (err < 0)
+		return err;
+
+	err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT, NULL);
+	if (err < 0)
+		return err;
+
+	/* This function is only called when the controller is actually in
+	 * configured state. When the controller is marked as unconfigured,
+	 * this initialization procedure is not run.
+	 *
+	 * It means that it is possible that a controller runs through its
+	 * setup phase and then discovers missing settings. If that is the
+	 * case, then this function will not be called. It then will only
+	 * be called during the config phase.
+	 *
+	 * So only when in setup phase or config phase, create the debugfs
+	 * entries and register the SMP channels.
+	 */
+	if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
+	    !hci_dev_test_flag(hdev, HCI_CONFIG))
+		return 0;
+
+	hci_debugfs_create_common(hdev);
+
+	if (lmp_bredr_capable(hdev))
+		hci_debugfs_create_bredr(hdev);
+
+	if (lmp_le_capable(hdev))
+		hci_debugfs_create_le(hdev);
+
+	return 0;
+}
+
+static int hci_init0_req(struct hci_request *req, unsigned long opt)
+{
+	struct hci_dev *hdev = req->hdev;
+
+	BT_DBG("%s %ld", hdev->name, opt);
+
+	/* Reset */
+	if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
+		hci_reset_req(req, 0);
+
+	/* Read Local Version */
+	hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
+
+	/* Read BD Address */
+	if (hdev->set_bdaddr)
+		hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
+
+	return 0;
+}
+
+static int __hci_unconf_init(struct hci_dev *hdev)
+{
+	int err;
+
+	if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
+		return 0;
+
+	err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT, NULL);
+	if (err < 0)
+		return err;
+
+	if (hci_dev_test_flag(hdev, HCI_SETUP))
+		hci_debugfs_create_basic(hdev);
+
+	return 0;
+}
+
+static int hci_scan_req(struct hci_request *req, unsigned long opt)
+{
+	__u8 scan = opt;
+
+	BT_DBG("%s %x", req->hdev->name, scan);
+
+	/* Inquiry and Page scans */
+	hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
+	return 0;
+}
+
+static int hci_auth_req(struct hci_request *req, unsigned long opt)
+{
+	__u8 auth = opt;
+
+	BT_DBG("%s %x", req->hdev->name, auth);
+
+	/* Authentication */
+	hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
+	return 0;
+}
+
+static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
+{
+	__u8 encrypt = opt;
+
+	BT_DBG("%s %x", req->hdev->name, encrypt);
+
+	/* Encryption */
+	hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
+	return 0;
+}
+
+static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
+{
+	__le16 policy = cpu_to_le16(opt);
+
+	BT_DBG("%s %x", req->hdev->name, policy);
+
+	/* Default link policy */
+	hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
+	return 0;
+}
+
+/* Get HCI device by index.
+ * Device is held on return. */
+struct hci_dev *hci_dev_get(int index)
+{
+	struct hci_dev *hdev = NULL, *d;
+
+	BT_DBG("%d", index);
+
+	if (index < 0)
+		return NULL;
+
+	read_lock(&hci_dev_list_lock);
+	list_for_each_entry(d, &hci_dev_list, list) {
+		if (d->id == index) {
+			hdev = hci_dev_hold(d);
+			break;
+		}
+	}
+	read_unlock(&hci_dev_list_lock);
+	return hdev;
+}
+
+/* ---- Inquiry support ---- */
+
+bool hci_discovery_active(struct hci_dev *hdev)
+{
+	struct discovery_state *discov = &hdev->discovery;
+
+	switch (discov->state) {
+	case DISCOVERY_FINDING:
+	case DISCOVERY_RESOLVING:
+		return true;
+
+	default:
+		return false;
+	}
+}
+
+void hci_discovery_set_state(struct hci_dev *hdev, int state)
+{
+	int old_state = hdev->discovery.state;
+
+	BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
+
+	if (old_state == state)
+		return;
+
+	hdev->discovery.state = state;
+
+	switch (state) {
+	case DISCOVERY_STOPPED:
+		hci_update_background_scan(hdev);
+
+		if (old_state != DISCOVERY_STARTING)
+			mgmt_discovering(hdev, 0);
+		break;
+	case DISCOVERY_STARTING:
+		break;
+	case DISCOVERY_FINDING:
+		mgmt_discovering(hdev, 1);
+		break;
+	case DISCOVERY_RESOLVING:
+		break;
+	case DISCOVERY_STOPPING:
+		break;
+	}
+}
+
+void hci_inquiry_cache_flush(struct hci_dev *hdev)
+{
+	struct discovery_state *cache = &hdev->discovery;
+	struct inquiry_entry *p, *n;
+
+	list_for_each_entry_safe(p, n, &cache->all, all) {
+		list_del(&p->all);
+		kfree(p);
+	}
+
+	INIT_LIST_HEAD(&cache->unknown);
+	INIT_LIST_HEAD(&cache->resolve);
+}
+
+struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
+					       bdaddr_t *bdaddr)
+{
+	struct discovery_state *cache = &hdev->discovery;
+	struct inquiry_entry *e;
+
+	BT_DBG("cache %p, %pMR", cache, bdaddr);
+
+	list_for_each_entry(e, &cache->all, all) {
+		if (!bacmp(&e->data.bdaddr, bdaddr))
+			return e;
+	}
+
+	return NULL;
+}
+
+struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
+						       bdaddr_t *bdaddr)
+{
+	struct discovery_state *cache = &hdev->discovery;
+	struct inquiry_entry *e;
+
+	BT_DBG("cache %p, %pMR", cache, bdaddr);
+
+	list_for_each_entry(e, &cache->unknown, list) {
+		if (!bacmp(&e->data.bdaddr, bdaddr))
+			return e;
+	}
+
+	return NULL;
+}
+
+struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
+						       bdaddr_t *bdaddr,
+						       int state)
+{
+	struct discovery_state *cache = &hdev->discovery;
+	struct inquiry_entry *e;
+
+	BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
+
+	list_for_each_entry(e, &cache->resolve, list) {
+		if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
+			return e;
+		if (!bacmp(&e->data.bdaddr, bdaddr))
+			return e;
+	}
+
+	return NULL;
+}
+
+void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
+				      struct inquiry_entry *ie)
+{
+	struct discovery_state *cache = &hdev->discovery;
+	struct list_head *pos = &cache->resolve;
+	struct inquiry_entry *p;
+
+	list_del(&ie->list);
+
+	list_for_each_entry(p, &cache->resolve, list) {
+		if (p->name_state != NAME_PENDING &&
+		    abs(p->data.rssi) >= abs(ie->data.rssi))
+			break;
+		pos = &p->list;
+	}
+
+	list_add(&ie->list, pos);
+}
+
+u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
+			     bool name_known)
+{
+	struct discovery_state *cache = &hdev->discovery;
+	struct inquiry_entry *ie;
+	u32 flags = 0;
+
+	BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
+
+	hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
+
+	if (!data->ssp_mode)
+		flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
+
+	ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
+	if (ie) {
+		if (!ie->data.ssp_mode)
+			flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
+
+		if (ie->name_state == NAME_NEEDED &&
+		    data->rssi != ie->data.rssi) {
+			ie->data.rssi = data->rssi;
+			hci_inquiry_cache_update_resolve(hdev, ie);
+		}
+
+		goto update;
+	}
+
+	/* Entry not in the cache. Add new one. */
+	ie = kzalloc(sizeof(*ie), GFP_KERNEL);
+	if (!ie) {
+		flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
+		goto done;
+	}
+
+	list_add(&ie->all, &cache->all);
+
+	if (name_known) {
+		ie->name_state = NAME_KNOWN;
+	} else {
+		ie->name_state = NAME_NOT_KNOWN;
+		list_add(&ie->list, &cache->unknown);
+	}
+
+update:
+	if (name_known && ie->name_state != NAME_KNOWN &&
+	    ie->name_state != NAME_PENDING) {
+		ie->name_state = NAME_KNOWN;
+		list_del(&ie->list);
+	}
+
+	memcpy(&ie->data, data, sizeof(*data));
+	ie->timestamp = jiffies;
+	cache->timestamp = jiffies;
+
+	if (ie->name_state == NAME_NOT_KNOWN)
+		flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
+
+done:
+	return flags;
+}
+
+static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
+{
+	struct discovery_state *cache = &hdev->discovery;
+	struct inquiry_info *info = (struct inquiry_info *) buf;
+	struct inquiry_entry *e;
+	int copied = 0;
+
+	list_for_each_entry(e, &cache->all, all) {
+		struct inquiry_data *data = &e->data;
+
+		if (copied >= num)
+			break;
+
+		bacpy(&info->bdaddr, &data->bdaddr);
+		info->pscan_rep_mode	= data->pscan_rep_mode;
+		info->pscan_period_mode	= data->pscan_period_mode;
+		info->pscan_mode	= data->pscan_mode;
+		memcpy(info->dev_class, data->dev_class, 3);
+		info->clock_offset	= data->clock_offset;
+
+		info++;
+		copied++;
+	}
+
+	BT_DBG("cache %p, copied %d", cache, copied);
+	return copied;
+}
+
+static int hci_inq_req(struct hci_request *req, unsigned long opt)
+{
+	struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
+	struct hci_dev *hdev = req->hdev;
+	struct hci_cp_inquiry cp;
+
+	BT_DBG("%s", hdev->name);
+
+	if (test_bit(HCI_INQUIRY, &hdev->flags))
+		return 0;
+
+	/* Start Inquiry */
+	memcpy(&cp.lap, &ir->lap, 3);
+	cp.length  = ir->length;
+	cp.num_rsp = ir->num_rsp;
+	hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
+
+	return 0;
+}
+
+int hci_inquiry(void __user *arg)
+{
+	__u8 __user *ptr = arg;
+	struct hci_inquiry_req ir;
+	struct hci_dev *hdev;
+	int err = 0, do_inquiry = 0, max_rsp;
+	long timeo;
+	__u8 *buf;
+
+	if (copy_from_user(&ir, ptr, sizeof(ir)))
+		return -EFAULT;
+
+	hdev = hci_dev_get(ir.dev_id);
+	if (!hdev)
+		return -ENODEV;
+
+	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
+		err = -EBUSY;
+		goto done;
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
+		err = -EOPNOTSUPP;
+		goto done;
+	}
+
+	if (hdev->dev_type != HCI_PRIMARY) {
+		err = -EOPNOTSUPP;
+		goto done;
+	}
+
+	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
+		err = -EOPNOTSUPP;
+		goto done;
+	}
+
+	/* Restrict maximum inquiry length to 60 seconds */
+	if (ir.length > 60) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	hci_dev_lock(hdev);
+	if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
+	    inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
+		hci_inquiry_cache_flush(hdev);
+		do_inquiry = 1;
+	}
+	hci_dev_unlock(hdev);
+
+	timeo = ir.length * msecs_to_jiffies(2000);
+
+	if (do_inquiry) {
+		err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
+				   timeo, NULL);
+		if (err < 0)
+			goto done;
+
+		/* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
+		 * cleared). If it is interrupted by a signal, return -EINTR.
+		 */
+		if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
+				TASK_INTERRUPTIBLE)) {
+			err = -EINTR;
+			goto done;
+		}
+	}
+
+	/* for unlimited number of responses we will use buffer with
+	 * 255 entries
+	 */
+	max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
+
+	/* cache_dump can't sleep. Therefore we allocate temp buffer and then
+	 * copy it to the user space.
+	 */
+	buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL);
+	if (!buf) {
+		err = -ENOMEM;
+		goto done;
+	}
+
+	hci_dev_lock(hdev);
+	ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
+	hci_dev_unlock(hdev);
+
+	BT_DBG("num_rsp %d", ir.num_rsp);
+
+	if (!copy_to_user(ptr, &ir, sizeof(ir))) {
+		ptr += sizeof(ir);
+		if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
+				 ir.num_rsp))
+			err = -EFAULT;
+	} else
+		err = -EFAULT;
+
+	kfree(buf);
+
+done:
+	hci_dev_put(hdev);
+	return err;
+}
+
+/**
+ * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
+ *				       (BD_ADDR) for a HCI device from
+ *				       a firmware node property.
+ * @hdev:	The HCI device
+ *
+ * Search the firmware node for 'local-bd-address'.
+ *
+ * All-zero BD addresses are rejected, because those could be properties
+ * that exist in the firmware tables, but were not updated by the firmware. For
+ * example, the DTS could define 'local-bd-address', with zero BD addresses.
+ */
+static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
+{
+	struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
+	bdaddr_t ba;
+	int ret;
+
+	ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
+					    (u8 *)&ba, sizeof(ba));
+	if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
+		return;
+
+	bacpy(&hdev->public_addr, &ba);
+}
+
+static int hci_dev_do_open(struct hci_dev *hdev)
+{
+	int ret = 0;
+
+	BT_DBG("%s %p", hdev->name, hdev);
+
+	hci_req_sync_lock(hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
+		ret = -ENODEV;
+		goto done;
+	}
+
+	if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
+	    !hci_dev_test_flag(hdev, HCI_CONFIG)) {
+		/* Check for rfkill but allow the HCI setup stage to
+		 * proceed (which in itself doesn't cause any RF activity).
+		 */
+		if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
+			ret = -ERFKILL;
+			goto done;
+		}
+
+		/* Check for valid public address or a configured static
+		 * random adddress, but let the HCI setup proceed to
+		 * be able to determine if there is a public address
+		 * or not.
+		 *
+		 * In case of user channel usage, it is not important
+		 * if a public address or static random address is
+		 * available.
+		 *
+		 * This check is only valid for BR/EDR controllers
+		 * since AMP controllers do not have an address.
+		 */
+		if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
+		    hdev->dev_type == HCI_PRIMARY &&
+		    !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
+		    !bacmp(&hdev->static_addr, BDADDR_ANY)) {
+			ret = -EADDRNOTAVAIL;
+			goto done;
+		}
+	}
+
+	if (test_bit(HCI_UP, &hdev->flags)) {
+		ret = -EALREADY;
+		goto done;
+	}
+
+	if (hdev->open(hdev)) {
+		ret = -EIO;
+		goto done;
+	}
+
+	set_bit(HCI_RUNNING, &hdev->flags);
+	hci_sock_dev_event(hdev, HCI_DEV_OPEN);
+
+	atomic_set(&hdev->cmd_cnt, 1);
+	set_bit(HCI_INIT, &hdev->flags);
+
+	if (hci_dev_test_flag(hdev, HCI_SETUP) ||
+	    test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks)) {
+		bool invalid_bdaddr;
+
+		hci_sock_dev_event(hdev, HCI_DEV_SETUP);
+
+		if (hdev->setup)
+			ret = hdev->setup(hdev);
+
+		/* The transport driver can set the quirk to mark the
+		 * BD_ADDR invalid before creating the HCI device or in
+		 * its setup callback.
+		 */
+		invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR,
+					  &hdev->quirks);
+
+		if (ret)
+			goto setup_failed;
+
+		if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) {
+			if (!bacmp(&hdev->public_addr, BDADDR_ANY))
+				hci_dev_get_bd_addr_from_property(hdev);
+
+			if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
+			    hdev->set_bdaddr) {
+				ret = hdev->set_bdaddr(hdev,
+						       &hdev->public_addr);
+
+				/* If setting of the BD_ADDR from the device
+				 * property succeeds, then treat the address
+				 * as valid even if the invalid BD_ADDR
+				 * quirk indicates otherwise.
+				 */
+				if (!ret)
+					invalid_bdaddr = false;
+			}
+		}
+
+setup_failed:
+		/* The transport driver can set these quirks before
+		 * creating the HCI device or in its setup callback.
+		 *
+		 * For the invalid BD_ADDR quirk it is possible that
+		 * it becomes a valid address if the bootloader does
+		 * provide it (see above).
+		 *
+		 * In case any of them is set, the controller has to
+		 * start up as unconfigured.
+		 */
+		if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
+		    invalid_bdaddr)
+			hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
+
+		/* For an unconfigured controller it is required to
+		 * read at least the version information provided by
+		 * the Read Local Version Information command.
+		 *
+		 * If the set_bdaddr driver callback is provided, then
+		 * also the original Bluetooth public device address
+		 * will be read using the Read BD Address command.
+		 */
+		if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
+			ret = __hci_unconf_init(hdev);
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
+		/* If public address change is configured, ensure that
+		 * the address gets programmed. If the driver does not
+		 * support changing the public address, fail the power
+		 * on procedure.
+		 */
+		if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
+		    hdev->set_bdaddr)
+			ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
+		else
+			ret = -EADDRNOTAVAIL;
+	}
+
+	if (!ret) {
+		if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
+		    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
+			ret = __hci_init(hdev);
+			if (!ret && hdev->post_init)
+				ret = hdev->post_init(hdev);
+		}
+	}
+
+	/* If the HCI Reset command is clearing all diagnostic settings,
+	 * then they need to be reprogrammed after the init procedure
+	 * completed.
+	 */
+	if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
+	    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
+	    hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
+		ret = hdev->set_diag(hdev, true);
+
+	msft_do_open(hdev);
+
+	clear_bit(HCI_INIT, &hdev->flags);
+
+	if (!ret) {
+		hci_dev_hold(hdev);
+		hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
+		hci_adv_instances_set_rpa_expired(hdev, true);
+		set_bit(HCI_UP, &hdev->flags);
+		hci_sock_dev_event(hdev, HCI_DEV_UP);
+		hci_leds_update_powered(hdev, true);
+		if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
+		    !hci_dev_test_flag(hdev, HCI_CONFIG) &&
+		    !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
+		    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
+		    hci_dev_test_flag(hdev, HCI_MGMT) &&
+		    hdev->dev_type == HCI_PRIMARY) {
+			ret = __hci_req_hci_power_on(hdev);
+			mgmt_power_on(hdev, ret);
+		}
+	} else {
+		/* Init failed, cleanup */
+		flush_work(&hdev->tx_work);
+
+		/* Since hci_rx_work() is possible to awake new cmd_work
+		 * it should be flushed first to avoid unexpected call of
+		 * hci_cmd_work()
+		 */
+		flush_work(&hdev->rx_work);
+		flush_work(&hdev->cmd_work);
+
+		skb_queue_purge(&hdev->cmd_q);
+		skb_queue_purge(&hdev->rx_q);
+
+		if (hdev->flush)
+			hdev->flush(hdev);
+
+		if (hdev->sent_cmd) {
+			cancel_delayed_work_sync(&hdev->cmd_timer);
+			kfree_skb(hdev->sent_cmd);
+			hdev->sent_cmd = NULL;
+		}
+
+		clear_bit(HCI_RUNNING, &hdev->flags);
+		hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
+
+		hdev->close(hdev);
+		hdev->flags &= BIT(HCI_RAW);
+	}
+
+done:
+	hci_req_sync_unlock(hdev);
+	return ret;
+}
+
+/* ---- HCI ioctl helpers ---- */
+
+int hci_dev_open(__u16 dev)
+{
+	struct hci_dev *hdev;
+	int err;
+
+	hdev = hci_dev_get(dev);
+	if (!hdev)
+		return -ENODEV;
+
+	/* Devices that are marked as unconfigured can only be powered
+	 * up as user channel. Trying to bring them up as normal devices
+	 * will result into a failure. Only user channel operation is
+	 * possible.
+	 *
+	 * When this function is called for a user channel, the flag
+	 * HCI_USER_CHANNEL will be set first before attempting to
+	 * open the device.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
+	    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
+		err = -EOPNOTSUPP;
+		goto done;
+	}
+
+	/* We need to ensure that no other power on/off work is pending
+	 * before proceeding to call hci_dev_do_open. This is
+	 * particularly important if the setup procedure has not yet
+	 * completed.
+	 */
+	if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
+		cancel_delayed_work(&hdev->power_off);
+
+	/* After this call it is guaranteed that the setup procedure
+	 * has finished. This means that error conditions like RFKILL
+	 * or no valid public or static random address apply.
+	 */
+	flush_workqueue(hdev->req_workqueue);
+
+	/* For controllers not using the management interface and that
+	 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
+	 * so that pairing works for them. Once the management interface
+	 * is in use this bit will be cleared again and userspace has
+	 * to explicitly enable it.
+	 */
+	if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
+	    !hci_dev_test_flag(hdev, HCI_MGMT))
+		hci_dev_set_flag(hdev, HCI_BONDABLE);
+
+	err = hci_dev_do_open(hdev);
+
+done:
+	hci_dev_put(hdev);
+	return err;
+}
+
+/* This function requires the caller holds hdev->lock */
+static void hci_pend_le_actions_clear(struct hci_dev *hdev)
+{
+	struct hci_conn_params *p;
+
+	list_for_each_entry(p, &hdev->le_conn_params, list) {
+		if (p->conn) {
+			hci_conn_drop(p->conn);
+			hci_conn_put(p->conn);
+			p->conn = NULL;
+		}
+		list_del_init(&p->action);
+	}
+
+	BT_DBG("All LE pending actions cleared");
+}
+
+int hci_dev_do_close(struct hci_dev *hdev)
+{
+	bool auto_off;
+
+	BT_DBG("%s %p", hdev->name, hdev);
+
+	if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
+	    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
+	    test_bit(HCI_UP, &hdev->flags)) {
+		/* Execute vendor specific shutdown routine */
+		if (hdev->shutdown)
+			hdev->shutdown(hdev);
+	}
+
+	cancel_delayed_work(&hdev->power_off);
+
+	hci_request_cancel_all(hdev);
+	hci_req_sync_lock(hdev);
+
+	if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
+		cancel_delayed_work_sync(&hdev->cmd_timer);
+		hci_req_sync_unlock(hdev);
+		return 0;
+	}
+
+	hci_leds_update_powered(hdev, false);
+
+	/* Flush RX and TX works */
+	flush_work(&hdev->tx_work);
+	flush_work(&hdev->rx_work);
+
+	if (hdev->discov_timeout > 0) {
+		hdev->discov_timeout = 0;
+		hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
+		hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
+	}
+
+	if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
+		cancel_delayed_work(&hdev->service_cache);
+
+	if (hci_dev_test_flag(hdev, HCI_MGMT)) {
+		struct adv_info *adv_instance;
+
+		cancel_delayed_work_sync(&hdev->rpa_expired);
+
+		list_for_each_entry(adv_instance, &hdev->adv_instances, list)
+			cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
+	}
+
+	/* Avoid potential lockdep warnings from the *_flush() calls by
+	 * ensuring the workqueue is empty up front.
+	 */
+	drain_workqueue(hdev->workqueue);
+
+	hci_dev_lock(hdev);
+
+	hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+
+	auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
+
+	if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
+	    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
+	    hci_dev_test_flag(hdev, HCI_MGMT))
+		__mgmt_power_off(hdev);
+
+	hci_inquiry_cache_flush(hdev);
+	hci_pend_le_actions_clear(hdev);
+	hci_conn_hash_flush(hdev);
+	hci_dev_unlock(hdev);
+
+	smp_unregister(hdev);
+
+	hci_sock_dev_event(hdev, HCI_DEV_DOWN);
+
+	msft_do_close(hdev);
+
+	if (hdev->flush)
+		hdev->flush(hdev);
+
+	/* Reset device */
+	skb_queue_purge(&hdev->cmd_q);
+	atomic_set(&hdev->cmd_cnt, 1);
+	if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
+	    !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
+		set_bit(HCI_INIT, &hdev->flags);
+		__hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT, NULL);
+		clear_bit(HCI_INIT, &hdev->flags);
+	}
+
+	/* flush cmd  work */
+	flush_work(&hdev->cmd_work);
+
+	/* Drop queues */
+	skb_queue_purge(&hdev->rx_q);
+	skb_queue_purge(&hdev->cmd_q);
+	skb_queue_purge(&hdev->raw_q);
+
+	/* Drop last sent command */
+	if (hdev->sent_cmd) {
+		cancel_delayed_work_sync(&hdev->cmd_timer);
+		kfree_skb(hdev->sent_cmd);
+		hdev->sent_cmd = NULL;
+	}
+
+	clear_bit(HCI_RUNNING, &hdev->flags);
+	hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
+
+	if (test_and_clear_bit(SUSPEND_POWERING_DOWN, hdev->suspend_tasks))
+		wake_up(&hdev->suspend_wait_q);
+
+	/* After this point our queues are empty
+	 * and no tasks are scheduled. */
+	hdev->close(hdev);
+
+	/* Clear flags */
+	hdev->flags &= BIT(HCI_RAW);
+	hci_dev_clear_volatile_flags(hdev);
+
+	/* Controller radio is available but is currently powered down */
+	hdev->amp_status = AMP_STATUS_POWERED_DOWN;
+
+	memset(hdev->eir, 0, sizeof(hdev->eir));
+	memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
+	bacpy(&hdev->random_addr, BDADDR_ANY);
+
+	hci_req_sync_unlock(hdev);
+
+	hci_dev_put(hdev);
+	return 0;
+}
+
+int hci_dev_close(__u16 dev)
+{
+	struct hci_dev *hdev;
+	int err;
+
+	hdev = hci_dev_get(dev);
+	if (!hdev)
+		return -ENODEV;
+
+	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
+		err = -EBUSY;
+		goto done;
+	}
+
+	if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
+		cancel_delayed_work(&hdev->power_off);
+
+	err = hci_dev_do_close(hdev);
+
+done:
+	hci_dev_put(hdev);
+	return err;
+}
+
+static int hci_dev_do_reset(struct hci_dev *hdev)
+{
+	int ret;
+
+	BT_DBG("%s %p", hdev->name, hdev);
+
+	hci_req_sync_lock(hdev);
+
+	/* Drop queues */
+	skb_queue_purge(&hdev->rx_q);
+	skb_queue_purge(&hdev->cmd_q);
+
+	/* Avoid potential lockdep warnings from the *_flush() calls by
+	 * ensuring the workqueue is empty up front.
+	 */
+	drain_workqueue(hdev->workqueue);
+
+	hci_dev_lock(hdev);
+	hci_inquiry_cache_flush(hdev);
+	hci_conn_hash_flush(hdev);
+	hci_dev_unlock(hdev);
+
+	if (hdev->flush)
+		hdev->flush(hdev);
+
+	atomic_set(&hdev->cmd_cnt, 1);
+	hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
+
+	ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT, NULL);
+
+	hci_req_sync_unlock(hdev);
+	return ret;
+}
+
+int hci_dev_reset(__u16 dev)
+{
+	struct hci_dev *hdev;
+	int err;
+
+	hdev = hci_dev_get(dev);
+	if (!hdev)
+		return -ENODEV;
+
+	if (!test_bit(HCI_UP, &hdev->flags)) {
+		err = -ENETDOWN;
+		goto done;
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
+		err = -EBUSY;
+		goto done;
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
+		err = -EOPNOTSUPP;
+		goto done;
+	}
+
+	err = hci_dev_do_reset(hdev);
+
+done:
+	hci_dev_put(hdev);
+	return err;
+}
+
+int hci_dev_reset_stat(__u16 dev)
+{
+	struct hci_dev *hdev;
+	int ret = 0;
+
+	hdev = hci_dev_get(dev);
+	if (!hdev)
+		return -ENODEV;
+
+	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
+		ret = -EBUSY;
+		goto done;
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
+		ret = -EOPNOTSUPP;
+		goto done;
+	}
+
+	memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
+
+done:
+	hci_dev_put(hdev);
+	return ret;
+}
+
+static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
+{
+	bool conn_changed, discov_changed;
+
+	BT_DBG("%s scan 0x%02x", hdev->name, scan);
+
+	if ((scan & SCAN_PAGE))
+		conn_changed = !hci_dev_test_and_set_flag(hdev,
+							  HCI_CONNECTABLE);
+	else
+		conn_changed = hci_dev_test_and_clear_flag(hdev,
+							   HCI_CONNECTABLE);
+
+	if ((scan & SCAN_INQUIRY)) {
+		discov_changed = !hci_dev_test_and_set_flag(hdev,
+							    HCI_DISCOVERABLE);
+	} else {
+		hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
+		discov_changed = hci_dev_test_and_clear_flag(hdev,
+							     HCI_DISCOVERABLE);
+	}
+
+	if (!hci_dev_test_flag(hdev, HCI_MGMT))
+		return;
+
+	if (conn_changed || discov_changed) {
+		/* In case this was disabled through mgmt */
+		hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
+
+		if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
+			hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
+
+		mgmt_new_settings(hdev);
+	}
+}
+
+int hci_dev_cmd(unsigned int cmd, void __user *arg)
+{
+	struct hci_dev *hdev;
+	struct hci_dev_req dr;
+	int err = 0;
+
+	if (copy_from_user(&dr, arg, sizeof(dr)))
+		return -EFAULT;
+
+	hdev = hci_dev_get(dr.dev_id);
+	if (!hdev)
+		return -ENODEV;
+
+	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
+		err = -EBUSY;
+		goto done;
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
+		err = -EOPNOTSUPP;
+		goto done;
+	}
+
+	if (hdev->dev_type != HCI_PRIMARY) {
+		err = -EOPNOTSUPP;
+		goto done;
+	}
+
+	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
+		err = -EOPNOTSUPP;
+		goto done;
+	}
+
+	switch (cmd) {
+	case HCISETAUTH:
+		err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
+				   HCI_INIT_TIMEOUT, NULL);
+		break;
+
+	case HCISETENCRYPT:
+		if (!lmp_encrypt_capable(hdev)) {
+			err = -EOPNOTSUPP;
+			break;
+		}
+
+		if (!test_bit(HCI_AUTH, &hdev->flags)) {
+			/* Auth must be enabled first */
+			err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
+					   HCI_INIT_TIMEOUT, NULL);
+			if (err)
+				break;
+		}
+
+		err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
+				   HCI_INIT_TIMEOUT, NULL);
+		break;
+
+	case HCISETSCAN:
+		err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
+				   HCI_INIT_TIMEOUT, NULL);
+
+		/* Ensure that the connectable and discoverable states
+		 * get correctly modified as this was a non-mgmt change.
+		 */
+		if (!err)
+			hci_update_scan_state(hdev, dr.dev_opt);
+		break;
+
+	case HCISETLINKPOL:
+		err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
+				   HCI_INIT_TIMEOUT, NULL);
+		break;
+
+	case HCISETLINKMODE:
+		hdev->link_mode = ((__u16) dr.dev_opt) &
+					(HCI_LM_MASTER | HCI_LM_ACCEPT);
+		break;
+
+	case HCISETPTYPE:
+		if (hdev->pkt_type == (__u16) dr.dev_opt)
+			break;
+
+		hdev->pkt_type = (__u16) dr.dev_opt;
+		mgmt_phy_configuration_changed(hdev, NULL);
+		break;
+
+	case HCISETACLMTU:
+		hdev->acl_mtu  = *((__u16 *) &dr.dev_opt + 1);
+		hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
+		break;
+
+	case HCISETSCOMTU:
+		hdev->sco_mtu  = *((__u16 *) &dr.dev_opt + 1);
+		hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
+		break;
+
+	default:
+		err = -EINVAL;
+		break;
+	}
+
+done:
+	hci_dev_put(hdev);
+	return err;
+}
+
+int hci_get_dev_list(void __user *arg)
+{
+	struct hci_dev *hdev;
+	struct hci_dev_list_req *dl;
+	struct hci_dev_req *dr;
+	int n = 0, size, err;
+	__u16 dev_num;
+
+	if (get_user(dev_num, (__u16 __user *) arg))
+		return -EFAULT;
+
+	if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
+		return -EINVAL;
+
+	size = sizeof(*dl) + dev_num * sizeof(*dr);
+
+	dl = kzalloc(size, GFP_KERNEL);
+	if (!dl)
+		return -ENOMEM;
+
+	dr = dl->dev_req;
+
+	read_lock(&hci_dev_list_lock);
+	list_for_each_entry(hdev, &hci_dev_list, list) {
+		unsigned long flags = hdev->flags;
+
+		/* When the auto-off is configured it means the transport
+		 * is running, but in that case still indicate that the
+		 * device is actually down.
+		 */
+		if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
+			flags &= ~BIT(HCI_UP);
+
+		(dr + n)->dev_id  = hdev->id;
+		(dr + n)->dev_opt = flags;
+
+		if (++n >= dev_num)
+			break;
+	}
+	read_unlock(&hci_dev_list_lock);
+
+	dl->dev_num = n;
+	size = sizeof(*dl) + n * sizeof(*dr);
+
+	err = copy_to_user(arg, dl, size);
+	kfree(dl);
+
+	return err ? -EFAULT : 0;
+}
+
+int hci_get_dev_info(void __user *arg)
+{
+	struct hci_dev *hdev;
+	struct hci_dev_info di;
+	unsigned long flags;
+	int err = 0;
+
+	if (copy_from_user(&di, arg, sizeof(di)))
+		return -EFAULT;
+
+	hdev = hci_dev_get(di.dev_id);
+	if (!hdev)
+		return -ENODEV;
+
+	/* When the auto-off is configured it means the transport
+	 * is running, but in that case still indicate that the
+	 * device is actually down.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
+		flags = hdev->flags & ~BIT(HCI_UP);
+	else
+		flags = hdev->flags;
+
+	strcpy(di.name, hdev->name);
+	di.bdaddr   = hdev->bdaddr;
+	di.type     = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
+	di.flags    = flags;
+	di.pkt_type = hdev->pkt_type;
+	if (lmp_bredr_capable(hdev)) {
+		di.acl_mtu  = hdev->acl_mtu;
+		di.acl_pkts = hdev->acl_pkts;
+		di.sco_mtu  = hdev->sco_mtu;
+		di.sco_pkts = hdev->sco_pkts;
+	} else {
+		di.acl_mtu  = hdev->le_mtu;
+		di.acl_pkts = hdev->le_pkts;
+		di.sco_mtu  = 0;
+		di.sco_pkts = 0;
+	}
+	di.link_policy = hdev->link_policy;
+	di.link_mode   = hdev->link_mode;
+
+	memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
+	memcpy(&di.features, &hdev->features, sizeof(di.features));
+
+	if (copy_to_user(arg, &di, sizeof(di)))
+		err = -EFAULT;
+
+	hci_dev_put(hdev);
+
+	return err;
+}
+
+/* ---- Interface to HCI drivers ---- */
+
+static int hci_rfkill_set_block(void *data, bool blocked)
+{
+	struct hci_dev *hdev = data;
+
+	BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
+
+	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
+		return -EBUSY;
+
+	if (blocked) {
+		hci_dev_set_flag(hdev, HCI_RFKILLED);
+		if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
+		    !hci_dev_test_flag(hdev, HCI_CONFIG))
+			hci_dev_do_close(hdev);
+	} else {
+		hci_dev_clear_flag(hdev, HCI_RFKILLED);
+	}
+
+	return 0;
+}
+
+static const struct rfkill_ops hci_rfkill_ops = {
+	.set_block = hci_rfkill_set_block,
+};
+
+static void hci_power_on(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
+	int err;
+
+	BT_DBG("%s", hdev->name);
+
+	if (test_bit(HCI_UP, &hdev->flags) &&
+	    hci_dev_test_flag(hdev, HCI_MGMT) &&
+	    hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
+		cancel_delayed_work(&hdev->power_off);
+		hci_req_sync_lock(hdev);
+		err = __hci_req_hci_power_on(hdev);
+		hci_req_sync_unlock(hdev);
+		mgmt_power_on(hdev, err);
+		return;
+	}
+
+	err = hci_dev_do_open(hdev);
+	if (err < 0) {
+		hci_dev_lock(hdev);
+		mgmt_set_powered_failed(hdev, err);
+		hci_dev_unlock(hdev);
+		return;
+	}
+
+	/* During the HCI setup phase, a few error conditions are
+	 * ignored and they need to be checked now. If they are still
+	 * valid, it is important to turn the device back off.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
+	    hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
+	    (hdev->dev_type == HCI_PRIMARY &&
+	     !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
+	     !bacmp(&hdev->static_addr, BDADDR_ANY))) {
+		hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
+		hci_dev_do_close(hdev);
+	} else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
+		queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
+				   HCI_AUTO_OFF_TIMEOUT);
+	}
+
+	if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
+		/* For unconfigured devices, set the HCI_RAW flag
+		 * so that userspace can easily identify them.
+		 */
+		if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
+			set_bit(HCI_RAW, &hdev->flags);
+
+		/* For fully configured devices, this will send
+		 * the Index Added event. For unconfigured devices,
+		 * it will send Unconfigued Index Added event.
+		 *
+		 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
+		 * and no event will be send.
+		 */
+		mgmt_index_added(hdev);
+	} else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
+		/* When the controller is now configured, then it
+		 * is important to clear the HCI_RAW flag.
+		 */
+		if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
+			clear_bit(HCI_RAW, &hdev->flags);
+
+		/* Powering on the controller with HCI_CONFIG set only
+		 * happens with the transition from unconfigured to
+		 * configured. This will send the Index Added event.
+		 */
+		mgmt_index_added(hdev);
+	}
+}
+
+static void hci_power_off(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev,
+					    power_off.work);
+
+	BT_DBG("%s", hdev->name);
+
+	hci_dev_do_close(hdev);
+}
+
+static void hci_error_reset(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
+
+	BT_DBG("%s", hdev->name);
+
+	if (hdev->hw_error)
+		hdev->hw_error(hdev, hdev->hw_error_code);
+	else
+		bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code);
+
+	if (hci_dev_do_close(hdev))
+		return;
+
+	hci_dev_do_open(hdev);
+}
+
+void hci_uuids_clear(struct hci_dev *hdev)
+{
+	struct bt_uuid *uuid, *tmp;
+
+	list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
+		list_del(&uuid->list);
+		kfree(uuid);
+	}
+}
+
+void hci_link_keys_clear(struct hci_dev *hdev)
+{
+	struct link_key *key, *tmp;
+
+	list_for_each_entry_safe(key, tmp, &hdev->link_keys, list) {
+		list_del_rcu(&key->list);
+		kfree_rcu(key, rcu);
+	}
+}
+
+void hci_smp_ltks_clear(struct hci_dev *hdev)
+{
+	struct smp_ltk *k, *tmp;
+
+	list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
+		list_del_rcu(&k->list);
+		kfree_rcu(k, rcu);
+	}
+}
+
+void hci_smp_irks_clear(struct hci_dev *hdev)
+{
+	struct smp_irk *k, *tmp;
+
+	list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
+		list_del_rcu(&k->list);
+		kfree_rcu(k, rcu);
+	}
+}
+
+void hci_blocked_keys_clear(struct hci_dev *hdev)
+{
+	struct blocked_key *b, *tmp;
+
+	list_for_each_entry_safe(b, tmp, &hdev->blocked_keys, list) {
+		list_del_rcu(&b->list);
+		kfree_rcu(b, rcu);
+	}
+}
+
+bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16])
+{
+	bool blocked = false;
+	struct blocked_key *b;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(b, &hdev->blocked_keys, list) {
+		if (b->type == type && !memcmp(b->val, val, sizeof(b->val))) {
+			blocked = true;
+			break;
+		}
+	}
+
+	rcu_read_unlock();
+	return blocked;
+}
+
+struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
+{
+	struct link_key *k;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(k, &hdev->link_keys, list) {
+		if (bacmp(bdaddr, &k->bdaddr) == 0) {
+			rcu_read_unlock();
+
+			if (hci_is_blocked_key(hdev,
+					       HCI_BLOCKED_KEY_TYPE_LINKKEY,
+					       k->val)) {
+				bt_dev_warn_ratelimited(hdev,
+							"Link key blocked for %pMR",
+							&k->bdaddr);
+				return NULL;
+			}
+
+			return k;
+		}
+	}
+	rcu_read_unlock();
+
+	return NULL;
+}
+
+static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
+			       u8 key_type, u8 old_key_type)
+{
+	/* Legacy key */
+	if (key_type < 0x03)
+		return true;
+
+	/* Debug keys are insecure so don't store them persistently */
+	if (key_type == HCI_LK_DEBUG_COMBINATION)
+		return false;
+
+	/* Changed combination key and there's no previous one */
+	if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
+		return false;
+
+	/* Security mode 3 case */
+	if (!conn)
+		return true;
+
+	/* BR/EDR key derived using SC from an LE link */
+	if (conn->type == LE_LINK)
+		return true;
+
+	/* Neither local nor remote side had no-bonding as requirement */
+	if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
+		return true;
+
+	/* Local side had dedicated bonding as requirement */
+	if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
+		return true;
+
+	/* Remote side had dedicated bonding as requirement */
+	if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
+		return true;
+
+	/* If none of the above criteria match, then don't store the key
+	 * persistently */
+	return false;
+}
+
+static u8 ltk_role(u8 type)
+{
+	if (type == SMP_LTK)
+		return HCI_ROLE_MASTER;
+
+	return HCI_ROLE_SLAVE;
+}
+
+struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
+			     u8 addr_type, u8 role)
+{
+	struct smp_ltk *k;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
+		if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
+			continue;
+
+		if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
+			rcu_read_unlock();
+
+			if (hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_LTK,
+					       k->val)) {
+				bt_dev_warn_ratelimited(hdev,
+							"LTK blocked for %pMR",
+							&k->bdaddr);
+				return NULL;
+			}
+
+			return k;
+		}
+	}
+	rcu_read_unlock();
+
+	return NULL;
+}
+
+struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
+{
+	struct smp_irk *irk_to_return = NULL;
+	struct smp_irk *irk;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
+		if (!bacmp(&irk->rpa, rpa)) {
+			irk_to_return = irk;
+			goto done;
+		}
+	}
+
+	list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
+		if (smp_irk_matches(hdev, irk->val, rpa)) {
+			bacpy(&irk->rpa, rpa);
+			irk_to_return = irk;
+			goto done;
+		}
+	}
+
+done:
+	if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
+						irk_to_return->val)) {
+		bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
+					&irk_to_return->bdaddr);
+		irk_to_return = NULL;
+	}
+
+	rcu_read_unlock();
+
+	return irk_to_return;
+}
+
+struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
+				     u8 addr_type)
+{
+	struct smp_irk *irk_to_return = NULL;
+	struct smp_irk *irk;
+
+	/* Identity Address must be public or static random */
+	if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
+		return NULL;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
+		if (addr_type == irk->addr_type &&
+		    bacmp(bdaddr, &irk->bdaddr) == 0) {
+			irk_to_return = irk;
+			goto done;
+		}
+	}
+
+done:
+
+	if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
+						irk_to_return->val)) {
+		bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
+					&irk_to_return->bdaddr);
+		irk_to_return = NULL;
+	}
+
+	rcu_read_unlock();
+
+	return irk_to_return;
+}
+
+struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
+				  bdaddr_t *bdaddr, u8 *val, u8 type,
+				  u8 pin_len, bool *persistent)
+{
+	struct link_key *key, *old_key;
+	u8 old_key_type;
+
+	old_key = hci_find_link_key(hdev, bdaddr);
+	if (old_key) {
+		old_key_type = old_key->type;
+		key = old_key;
+	} else {
+		old_key_type = conn ? conn->key_type : 0xff;
+		key = kzalloc(sizeof(*key), GFP_KERNEL);
+		if (!key)
+			return NULL;
+		list_add_rcu(&key->list, &hdev->link_keys);
+	}
+
+	BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
+
+	/* Some buggy controller combinations generate a changed
+	 * combination key for legacy pairing even when there's no
+	 * previous key */
+	if (type == HCI_LK_CHANGED_COMBINATION &&
+	    (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
+		type = HCI_LK_COMBINATION;
+		if (conn)
+			conn->key_type = type;
+	}
+
+	bacpy(&key->bdaddr, bdaddr);
+	memcpy(key->val, val, HCI_LINK_KEY_SIZE);
+	key->pin_len = pin_len;
+
+	if (type == HCI_LK_CHANGED_COMBINATION)
+		key->type = old_key_type;
+	else
+		key->type = type;
+
+	if (persistent)
+		*persistent = hci_persistent_key(hdev, conn, type,
+						 old_key_type);
+
+	return key;
+}
+
+struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
+			    u8 addr_type, u8 type, u8 authenticated,
+			    u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
+{
+	struct smp_ltk *key, *old_key;
+	u8 role = ltk_role(type);
+
+	old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
+	if (old_key)
+		key = old_key;
+	else {
+		key = kzalloc(sizeof(*key), GFP_KERNEL);
+		if (!key)
+			return NULL;
+		list_add_rcu(&key->list, &hdev->long_term_keys);
+	}
+
+	bacpy(&key->bdaddr, bdaddr);
+	key->bdaddr_type = addr_type;
+	memcpy(key->val, tk, sizeof(key->val));
+	key->authenticated = authenticated;
+	key->ediv = ediv;
+	key->rand = rand;
+	key->enc_size = enc_size;
+	key->type = type;
+
+	return key;
+}
+
+struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
+			    u8 addr_type, u8 val[16], bdaddr_t *rpa)
+{
+	struct smp_irk *irk;
+
+	irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
+	if (!irk) {
+		irk = kzalloc(sizeof(*irk), GFP_KERNEL);
+		if (!irk)
+			return NULL;
+
+		bacpy(&irk->bdaddr, bdaddr);
+		irk->addr_type = addr_type;
+
+		list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
+	}
+
+	memcpy(irk->val, val, 16);
+	bacpy(&irk->rpa, rpa);
+
+	return irk;
+}
+
+int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
+{
+	struct link_key *key;
+
+	key = hci_find_link_key(hdev, bdaddr);
+	if (!key)
+		return -ENOENT;
+
+	BT_DBG("%s removing %pMR", hdev->name, bdaddr);
+
+	list_del_rcu(&key->list);
+	kfree_rcu(key, rcu);
+
+	return 0;
+}
+
+int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
+{
+	struct smp_ltk *k, *tmp;
+	int removed = 0;
+
+	list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
+		if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
+			continue;
+
+		BT_DBG("%s removing %pMR", hdev->name, bdaddr);
+
+		list_del_rcu(&k->list);
+		kfree_rcu(k, rcu);
+		removed++;
+	}
+
+	return removed ? 0 : -ENOENT;
+}
+
+void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
+{
+	struct smp_irk *k, *tmp;
+
+	list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
+		if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
+			continue;
+
+		BT_DBG("%s removing %pMR", hdev->name, bdaddr);
+
+		list_del_rcu(&k->list);
+		kfree_rcu(k, rcu);
+	}
+}
+
+bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
+{
+	struct smp_ltk *k;
+	struct smp_irk *irk;
+	u8 addr_type;
+
+	if (type == BDADDR_BREDR) {
+		if (hci_find_link_key(hdev, bdaddr))
+			return true;
+		return false;
+	}
+
+	/* Convert to HCI addr type which struct smp_ltk uses */
+	if (type == BDADDR_LE_PUBLIC)
+		addr_type = ADDR_LE_DEV_PUBLIC;
+	else
+		addr_type = ADDR_LE_DEV_RANDOM;
+
+	irk = hci_get_irk(hdev, bdaddr, addr_type);
+	if (irk) {
+		bdaddr = &irk->bdaddr;
+		addr_type = irk->addr_type;
+	}
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
+		if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
+			rcu_read_unlock();
+			return true;
+		}
+	}
+	rcu_read_unlock();
+
+	return false;
+}
+
+/* HCI command timer function */
+static void hci_cmd_timeout(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev,
+					    cmd_timer.work);
+
+	if (hdev->sent_cmd) {
+		struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
+		u16 opcode = __le16_to_cpu(sent->opcode);
+
+		bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode);
+	} else {
+		bt_dev_err(hdev, "command tx timeout");
+	}
+
+	if (hdev->cmd_timeout)
+		hdev->cmd_timeout(hdev);
+
+	atomic_set(&hdev->cmd_cnt, 1);
+	queue_work(hdev->workqueue, &hdev->cmd_work);
+}
+
+struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
+					  bdaddr_t *bdaddr, u8 bdaddr_type)
+{
+	struct oob_data *data;
+
+	list_for_each_entry(data, &hdev->remote_oob_data, list) {
+		if (bacmp(bdaddr, &data->bdaddr) != 0)
+			continue;
+		if (data->bdaddr_type != bdaddr_type)
+			continue;
+		return data;
+	}
+
+	return NULL;
+}
+
+int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
+			       u8 bdaddr_type)
+{
+	struct oob_data *data;
+
+	data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
+	if (!data)
+		return -ENOENT;
+
+	BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
+
+	list_del(&data->list);
+	kfree(data);
+
+	return 0;
+}
+
+void hci_remote_oob_data_clear(struct hci_dev *hdev)
+{
+	struct oob_data *data, *n;
+
+	list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
+		list_del(&data->list);
+		kfree(data);
+	}
+}
+
+int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
+			    u8 bdaddr_type, u8 *hash192, u8 *rand192,
+			    u8 *hash256, u8 *rand256)
+{
+	struct oob_data *data;
+
+	data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
+	if (!data) {
+		data = kmalloc(sizeof(*data), GFP_KERNEL);
+		if (!data)
+			return -ENOMEM;
+
+		bacpy(&data->bdaddr, bdaddr);
+		data->bdaddr_type = bdaddr_type;
+		list_add(&data->list, &hdev->remote_oob_data);
+	}
+
+	if (hash192 && rand192) {
+		memcpy(data->hash192, hash192, sizeof(data->hash192));
+		memcpy(data->rand192, rand192, sizeof(data->rand192));
+		if (hash256 && rand256)
+			data->present = 0x03;
+	} else {
+		memset(data->hash192, 0, sizeof(data->hash192));
+		memset(data->rand192, 0, sizeof(data->rand192));
+		if (hash256 && rand256)
+			data->present = 0x02;
+		else
+			data->present = 0x00;
+	}
+
+	if (hash256 && rand256) {
+		memcpy(data->hash256, hash256, sizeof(data->hash256));
+		memcpy(data->rand256, rand256, sizeof(data->rand256));
+	} else {
+		memset(data->hash256, 0, sizeof(data->hash256));
+		memset(data->rand256, 0, sizeof(data->rand256));
+		if (hash192 && rand192)
+			data->present = 0x01;
+	}
+
+	BT_DBG("%s for %pMR", hdev->name, bdaddr);
+
+	return 0;
+}
+
+/* This function requires the caller holds hdev->lock */
+struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
+{
+	struct adv_info *adv_instance;
+
+	list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
+		if (adv_instance->instance == instance)
+			return adv_instance;
+	}
+
+	return NULL;
+}
+
+/* This function requires the caller holds hdev->lock */
+struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
+{
+	struct adv_info *cur_instance;
+
+	cur_instance = hci_find_adv_instance(hdev, instance);
+	if (!cur_instance)
+		return NULL;
+
+	if (cur_instance == list_last_entry(&hdev->adv_instances,
+					    struct adv_info, list))
+		return list_first_entry(&hdev->adv_instances,
+						 struct adv_info, list);
+	else
+		return list_next_entry(cur_instance, list);
+}
+
+/* This function requires the caller holds hdev->lock */
+int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
+{
+	struct adv_info *adv_instance;
+
+	adv_instance = hci_find_adv_instance(hdev, instance);
+	if (!adv_instance)
+		return -ENOENT;
+
+	BT_DBG("%s removing %dMR", hdev->name, instance);
+
+	if (hdev->cur_adv_instance == instance) {
+		if (hdev->adv_instance_timeout) {
+			cancel_delayed_work(&hdev->adv_instance_expire);
+			hdev->adv_instance_timeout = 0;
+		}
+		hdev->cur_adv_instance = 0x00;
+	}
+
+	cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
+
+	list_del(&adv_instance->list);
+	kfree(adv_instance);
+
+	hdev->adv_instance_cnt--;
+
+	return 0;
+}
+
+void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired)
+{
+	struct adv_info *adv_instance, *n;
+
+	list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list)
+		adv_instance->rpa_expired = rpa_expired;
+}
+
+/* This function requires the caller holds hdev->lock */
+void hci_adv_instances_clear(struct hci_dev *hdev)
+{
+	struct adv_info *adv_instance, *n;
+
+	if (hdev->adv_instance_timeout) {
+		cancel_delayed_work(&hdev->adv_instance_expire);
+		hdev->adv_instance_timeout = 0;
+	}
+
+	list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
+		cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
+		list_del(&adv_instance->list);
+		kfree(adv_instance);
+	}
+
+	hdev->adv_instance_cnt = 0;
+	hdev->cur_adv_instance = 0x00;
+}
+
+static void adv_instance_rpa_expired(struct work_struct *work)
+{
+	struct adv_info *adv_instance = container_of(work, struct adv_info,
+						     rpa_expired_cb.work);
+
+	BT_DBG("");
+
+	adv_instance->rpa_expired = true;
+}
+
+/* This function requires the caller holds hdev->lock */
+int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
+			 u16 adv_data_len, u8 *adv_data,
+			 u16 scan_rsp_len, u8 *scan_rsp_data,
+			 u16 timeout, u16 duration)
+{
+	struct adv_info *adv_instance;
+
+	adv_instance = hci_find_adv_instance(hdev, instance);
+	if (adv_instance) {
+		memset(adv_instance->adv_data, 0,
+		       sizeof(adv_instance->adv_data));
+		memset(adv_instance->scan_rsp_data, 0,
+		       sizeof(adv_instance->scan_rsp_data));
+	} else {
+		if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets ||
+		    instance < 1 || instance > hdev->le_num_of_adv_sets)
+			return -EOVERFLOW;
+
+		adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
+		if (!adv_instance)
+			return -ENOMEM;
+
+		adv_instance->pending = true;
+		adv_instance->instance = instance;
+		list_add(&adv_instance->list, &hdev->adv_instances);
+		hdev->adv_instance_cnt++;
+	}
+
+	adv_instance->flags = flags;
+	adv_instance->adv_data_len = adv_data_len;
+	adv_instance->scan_rsp_len = scan_rsp_len;
+
+	if (adv_data_len)
+		memcpy(adv_instance->adv_data, adv_data, adv_data_len);
+
+	if (scan_rsp_len)
+		memcpy(adv_instance->scan_rsp_data,
+		       scan_rsp_data, scan_rsp_len);
+
+	adv_instance->timeout = timeout;
+	adv_instance->remaining_time = timeout;
+
+	if (duration == 0)
+		adv_instance->duration = hdev->def_multi_adv_rotation_duration;
+	else
+		adv_instance->duration = duration;
+
+	adv_instance->tx_power = HCI_TX_POWER_INVALID;
+
+	INIT_DELAYED_WORK(&adv_instance->rpa_expired_cb,
+			  adv_instance_rpa_expired);
+
+	BT_DBG("%s for %dMR", hdev->name, instance);
+
+	return 0;
+}
+
+/* This function requires the caller holds hdev->lock */
+void hci_adv_monitors_clear(struct hci_dev *hdev)
+{
+	struct adv_monitor *monitor;
+	int handle;
+
+	idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle)
+		hci_free_adv_monitor(monitor);
+
+	idr_destroy(&hdev->adv_monitors_idr);
+}
+
+void hci_free_adv_monitor(struct adv_monitor *monitor)
+{
+	struct adv_pattern *pattern;
+	struct adv_pattern *tmp;
+
+	if (!monitor)
+		return;
+
+	list_for_each_entry_safe(pattern, tmp, &monitor->patterns, list)
+		kfree(pattern);
+
+	kfree(monitor);
+}
+
+/* This function requires the caller holds hdev->lock */
+int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
+{
+	int min, max, handle;
+
+	if (!monitor)
+		return -EINVAL;
+
+	min = HCI_MIN_ADV_MONITOR_HANDLE;
+	max = HCI_MIN_ADV_MONITOR_HANDLE + HCI_MAX_ADV_MONITOR_NUM_HANDLES;
+	handle = idr_alloc(&hdev->adv_monitors_idr, monitor, min, max,
+			   GFP_KERNEL);
+	if (handle < 0)
+		return handle;
+
+	hdev->adv_monitors_cnt++;
+	monitor->handle = handle;
+
+	hci_update_background_scan(hdev);
+
+	return 0;
+}
+
+static int free_adv_monitor(int id, void *ptr, void *data)
+{
+	struct hci_dev *hdev = data;
+	struct adv_monitor *monitor = ptr;
+
+	idr_remove(&hdev->adv_monitors_idr, monitor->handle);
+	hci_free_adv_monitor(monitor);
+	hdev->adv_monitors_cnt--;
+
+	return 0;
+}
+
+/* This function requires the caller holds hdev->lock */
+int hci_remove_adv_monitor(struct hci_dev *hdev, u16 handle)
+{
+	struct adv_monitor *monitor;
+
+	if (handle) {
+		monitor = idr_find(&hdev->adv_monitors_idr, handle);
+		if (!monitor)
+			return -ENOENT;
+
+		idr_remove(&hdev->adv_monitors_idr, monitor->handle);
+		hci_free_adv_monitor(monitor);
+		hdev->adv_monitors_cnt--;
+	} else {
+		/* Remove all monitors if handle is 0. */
+		idr_for_each(&hdev->adv_monitors_idr, &free_adv_monitor, hdev);
+	}
+
+	hci_update_background_scan(hdev);
+
+	return 0;
+}
+
+/* This function requires the caller holds hdev->lock */
+bool hci_is_adv_monitoring(struct hci_dev *hdev)
+{
+	return !idr_is_empty(&hdev->adv_monitors_idr);
+}
+
+struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
+					 bdaddr_t *bdaddr, u8 type)
+{
+	struct bdaddr_list *b;
+
+	list_for_each_entry(b, bdaddr_list, list) {
+		if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
+			return b;
+	}
+
+	return NULL;
+}
+
+struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
+				struct list_head *bdaddr_list, bdaddr_t *bdaddr,
+				u8 type)
+{
+	struct bdaddr_list_with_irk *b;
+
+	list_for_each_entry(b, bdaddr_list, list) {
+		if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
+			return b;
+	}
+
+	return NULL;
+}
+
+struct bdaddr_list_with_flags *
+hci_bdaddr_list_lookup_with_flags(struct list_head *bdaddr_list,
+				  bdaddr_t *bdaddr, u8 type)
+{
+	struct bdaddr_list_with_flags *b;
+
+	list_for_each_entry(b, bdaddr_list, list) {
+		if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
+			return b;
+	}
+
+	return NULL;
+}
+
+void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
+{
+	struct bdaddr_list *b, *n;
+
+	list_for_each_entry_safe(b, n, bdaddr_list, list) {
+		list_del(&b->list);
+		kfree(b);
+	}
+}
+
+int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
+{
+	struct bdaddr_list *entry;
+
+	if (!bacmp(bdaddr, BDADDR_ANY))
+		return -EBADF;
+
+	if (hci_bdaddr_list_lookup(list, bdaddr, type))
+		return -EEXIST;
+
+	entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+	if (!entry)
+		return -ENOMEM;
+
+	bacpy(&entry->bdaddr, bdaddr);
+	entry->bdaddr_type = type;
+
+	list_add(&entry->list, list);
+
+	return 0;
+}
+
+int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
+					u8 type, u8 *peer_irk, u8 *local_irk)
+{
+	struct bdaddr_list_with_irk *entry;
+
+	if (!bacmp(bdaddr, BDADDR_ANY))
+		return -EBADF;
+
+	if (hci_bdaddr_list_lookup(list, bdaddr, type))
+		return -EEXIST;
+
+	entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+	if (!entry)
+		return -ENOMEM;
+
+	bacpy(&entry->bdaddr, bdaddr);
+	entry->bdaddr_type = type;
+
+	if (peer_irk)
+		memcpy(entry->peer_irk, peer_irk, 16);
+
+	if (local_irk)
+		memcpy(entry->local_irk, local_irk, 16);
+
+	list_add(&entry->list, list);
+
+	return 0;
+}
+
+int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
+				   u8 type, u32 flags)
+{
+	struct bdaddr_list_with_flags *entry;
+
+	if (!bacmp(bdaddr, BDADDR_ANY))
+		return -EBADF;
+
+	if (hci_bdaddr_list_lookup(list, bdaddr, type))
+		return -EEXIST;
+
+	entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+	if (!entry)
+		return -ENOMEM;
+
+	bacpy(&entry->bdaddr, bdaddr);
+	entry->bdaddr_type = type;
+	entry->current_flags = flags;
+
+	list_add(&entry->list, list);
+
+	return 0;
+}
+
+int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
+{
+	struct bdaddr_list *entry;
+
+	if (!bacmp(bdaddr, BDADDR_ANY)) {
+		hci_bdaddr_list_clear(list);
+		return 0;
+	}
+
+	entry = hci_bdaddr_list_lookup(list, bdaddr, type);
+	if (!entry)
+		return -ENOENT;
+
+	list_del(&entry->list);
+	kfree(entry);
+
+	return 0;
+}
+
+int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
+							u8 type)
+{
+	struct bdaddr_list_with_irk *entry;
+
+	if (!bacmp(bdaddr, BDADDR_ANY)) {
+		hci_bdaddr_list_clear(list);
+		return 0;
+	}
+
+	entry = hci_bdaddr_list_lookup_with_irk(list, bdaddr, type);
+	if (!entry)
+		return -ENOENT;
+
+	list_del(&entry->list);
+	kfree(entry);
+
+	return 0;
+}
+
+int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
+				   u8 type)
+{
+	struct bdaddr_list_with_flags *entry;
+
+	if (!bacmp(bdaddr, BDADDR_ANY)) {
+		hci_bdaddr_list_clear(list);
+		return 0;
+	}
+
+	entry = hci_bdaddr_list_lookup_with_flags(list, bdaddr, type);
+	if (!entry)
+		return -ENOENT;
+
+	list_del(&entry->list);
+	kfree(entry);
+
+	return 0;
+}
+
+/* This function requires the caller holds hdev->lock */
+struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
+					       bdaddr_t *addr, u8 addr_type)
+{
+	struct hci_conn_params *params;
+
+	list_for_each_entry(params, &hdev->le_conn_params, list) {
+		if (bacmp(&params->addr, addr) == 0 &&
+		    params->addr_type == addr_type) {
+			return params;
+		}
+	}
+
+	return NULL;
+}
+
+/* This function requires the caller holds hdev->lock */
+struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
+						  bdaddr_t *addr, u8 addr_type)
+{
+	struct hci_conn_params *param;
+
+	switch (addr_type) {
+	case ADDR_LE_DEV_PUBLIC_RESOLVED:
+		addr_type = ADDR_LE_DEV_PUBLIC;
+		break;
+	case ADDR_LE_DEV_RANDOM_RESOLVED:
+		addr_type = ADDR_LE_DEV_RANDOM;
+		break;
+	}
+
+	list_for_each_entry(param, list, action) {
+		if (bacmp(&param->addr, addr) == 0 &&
+		    param->addr_type == addr_type)
+			return param;
+	}
+
+	return NULL;
+}
+
+/* This function requires the caller holds hdev->lock */
+struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
+					    bdaddr_t *addr, u8 addr_type)
+{
+	struct hci_conn_params *params;
+
+	params = hci_conn_params_lookup(hdev, addr, addr_type);
+	if (params)
+		return params;
+
+	params = kzalloc(sizeof(*params), GFP_KERNEL);
+	if (!params) {
+		bt_dev_err(hdev, "out of memory");
+		return NULL;
+	}
+
+	bacpy(&params->addr, addr);
+	params->addr_type = addr_type;
+
+	list_add(&params->list, &hdev->le_conn_params);
+	INIT_LIST_HEAD(&params->action);
+
+	params->conn_min_interval = hdev->le_conn_min_interval;
+	params->conn_max_interval = hdev->le_conn_max_interval;
+	params->conn_latency = hdev->le_conn_latency;
+	params->supervision_timeout = hdev->le_supv_timeout;
+	params->auto_connect = HCI_AUTO_CONN_DISABLED;
+
+	BT_DBG("addr %pMR (type %u)", addr, addr_type);
+
+	return params;
+}
+
+static void hci_conn_params_free(struct hci_conn_params *params)
+{
+	if (params->conn) {
+		hci_conn_drop(params->conn);
+		hci_conn_put(params->conn);
+	}
+
+	list_del(&params->action);
+	list_del(&params->list);
+	kfree(params);
+}
+
+/* This function requires the caller holds hdev->lock */
+void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
+{
+	struct hci_conn_params *params;
+
+	params = hci_conn_params_lookup(hdev, addr, addr_type);
+	if (!params)
+		return;
+
+	hci_conn_params_free(params);
+
+	hci_update_background_scan(hdev);
+
+	BT_DBG("addr %pMR (type %u)", addr, addr_type);
+}
+
+/* This function requires the caller holds hdev->lock */
+void hci_conn_params_clear_disabled(struct hci_dev *hdev)
+{
+	struct hci_conn_params *params, *tmp;
+
+	list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
+		if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
+			continue;
+
+		/* If trying to estabilish one time connection to disabled
+		 * device, leave the params, but mark them as just once.
+		 */
+		if (params->explicit_connect) {
+			params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
+			continue;
+		}
+
+		list_del(&params->list);
+		kfree(params);
+	}
+
+	BT_DBG("All LE disabled connection parameters were removed");
+}
+
+/* This function requires the caller holds hdev->lock */
+static void hci_conn_params_clear_all(struct hci_dev *hdev)
+{
+	struct hci_conn_params *params, *tmp;
+
+	list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
+		hci_conn_params_free(params);
+
+	BT_DBG("All LE connection parameters were removed");
+}
+
+/* Copy the Identity Address of the controller.
+ *
+ * If the controller has a public BD_ADDR, then by default use that one.
+ * If this is a LE only controller without a public address, default to
+ * the static random address.
+ *
+ * For debugging purposes it is possible to force controllers with a
+ * public address to use the static random address instead.
+ *
+ * In case BR/EDR has been disabled on a dual-mode controller and
+ * userspace has configured a static address, then that address
+ * becomes the identity address instead of the public BR/EDR address.
+ */
+void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
+			       u8 *bdaddr_type)
+{
+	if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
+	    !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
+	    (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
+	     bacmp(&hdev->static_addr, BDADDR_ANY))) {
+		bacpy(bdaddr, &hdev->static_addr);
+		*bdaddr_type = ADDR_LE_DEV_RANDOM;
+	} else {
+		bacpy(bdaddr, &hdev->bdaddr);
+		*bdaddr_type = ADDR_LE_DEV_PUBLIC;
+	}
+}
+
+static void hci_suspend_clear_tasks(struct hci_dev *hdev)
+{
+	int i;
+
+	for (i = 0; i < __SUSPEND_NUM_TASKS; i++)
+		clear_bit(i, hdev->suspend_tasks);
+
+	wake_up(&hdev->suspend_wait_q);
+}
+
+static int hci_suspend_wait_event(struct hci_dev *hdev)
+{
+#define WAKE_COND                                                              \
+	(find_first_bit(hdev->suspend_tasks, __SUSPEND_NUM_TASKS) ==           \
+	 __SUSPEND_NUM_TASKS)
+
+	int i;
+	int ret = wait_event_timeout(hdev->suspend_wait_q,
+				     WAKE_COND, SUSPEND_NOTIFIER_TIMEOUT);
+
+	if (ret == 0) {
+		bt_dev_err(hdev, "Timed out waiting for suspend events");
+		for (i = 0; i < __SUSPEND_NUM_TASKS; ++i) {
+			if (test_bit(i, hdev->suspend_tasks))
+				bt_dev_err(hdev, "Suspend timeout bit: %d", i);
+			clear_bit(i, hdev->suspend_tasks);
+		}
+
+		ret = -ETIMEDOUT;
+	} else {
+		ret = 0;
+	}
+
+	return ret;
+}
+
+static void hci_prepare_suspend(struct work_struct *work)
+{
+	struct hci_dev *hdev =
+		container_of(work, struct hci_dev, suspend_prepare);
+
+	hci_dev_lock(hdev);
+	hci_req_prepare_suspend(hdev, hdev->suspend_state_next);
+	hci_dev_unlock(hdev);
+}
+
+static int hci_change_suspend_state(struct hci_dev *hdev,
+				    enum suspended_state next)
+{
+	hdev->suspend_state_next = next;
+	set_bit(SUSPEND_PREPARE_NOTIFIER, hdev->suspend_tasks);
+	queue_work(hdev->req_workqueue, &hdev->suspend_prepare);
+	return hci_suspend_wait_event(hdev);
+}
+
+static void hci_clear_wake_reason(struct hci_dev *hdev)
+{
+	hci_dev_lock(hdev);
+
+	hdev->wake_reason = 0;
+	bacpy(&hdev->wake_addr, BDADDR_ANY);
+	hdev->wake_addr_type = 0;
+
+	hci_dev_unlock(hdev);
+}
+
+static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action,
+				void *data)
+{
+	struct hci_dev *hdev =
+		container_of(nb, struct hci_dev, suspend_notifier);
+	int ret = 0;
+	u8 state = BT_RUNNING;
+
+	/* If powering down, wait for completion. */
+	if (mgmt_powering_down(hdev)) {
+		set_bit(SUSPEND_POWERING_DOWN, hdev->suspend_tasks);
+		ret = hci_suspend_wait_event(hdev);
+		if (ret)
+			goto done;
+	}
+
+	/* Suspend notifier should only act on events when powered. */
+	if (!hdev_is_powered(hdev) ||
+	    hci_dev_test_flag(hdev, HCI_UNREGISTER))
+		goto done;
+
+	if (action == PM_SUSPEND_PREPARE) {
+		/* Suspend consists of two actions:
+		 *  - First, disconnect everything and make the controller not
+		 *    connectable (disabling scanning)
+		 *  - Second, program event filter/accept list and enable scan
+		 */
+		ret = hci_change_suspend_state(hdev, BT_SUSPEND_DISCONNECT);
+		if (!ret)
+			state = BT_SUSPEND_DISCONNECT;
+
+		/* Only configure accept list if disconnect succeeded and wake
+		 * isn't being prevented.
+		 */
+		if (!ret && !(hdev->prevent_wake && hdev->prevent_wake(hdev))) {
+			ret = hci_change_suspend_state(hdev,
+						BT_SUSPEND_CONFIGURE_WAKE);
+			if (!ret)
+				state = BT_SUSPEND_CONFIGURE_WAKE;
+		}
+
+		hci_clear_wake_reason(hdev);
+		mgmt_suspending(hdev, state);
+
+	} else if (action == PM_POST_SUSPEND) {
+		ret = hci_change_suspend_state(hdev, BT_RUNNING);
+
+		mgmt_resuming(hdev, hdev->wake_reason, &hdev->wake_addr,
+			      hdev->wake_addr_type);
+	}
+
+done:
+	/* We always allow suspend even if suspend preparation failed and
+	 * attempt to recover in resume.
+	 */
+	if (ret)
+		bt_dev_err(hdev, "Suspend notifier action (%lu) failed: %d",
+			   action, ret);
+
+	return NOTIFY_DONE;
+}
+
+/* Alloc HCI device */
+struct hci_dev *hci_alloc_dev(void)
+{
+	struct hci_dev *hdev;
+
+	hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
+	if (!hdev)
+		return NULL;
+
+	hdev->pkt_type  = (HCI_DM1 | HCI_DH1 | HCI_HV1);
+	hdev->esco_type = (ESCO_HV1);
+	hdev->link_mode = (HCI_LM_ACCEPT);
+	hdev->num_iac = 0x01;		/* One IAC support is mandatory */
+	hdev->io_capability = 0x03;	/* No Input No Output */
+	hdev->manufacturer = 0xffff;	/* Default to internal use */
+	hdev->inq_tx_power = HCI_TX_POWER_INVALID;
+	hdev->adv_tx_power = HCI_TX_POWER_INVALID;
+	hdev->adv_instance_cnt = 0;
+	hdev->cur_adv_instance = 0x00;
+	hdev->adv_instance_timeout = 0;
+
+	hdev->advmon_allowlist_duration = 300;
+	hdev->advmon_no_filter_duration = 500;
+
+	hdev->sniff_max_interval = 800;
+	hdev->sniff_min_interval = 80;
+
+	hdev->le_adv_channel_map = 0x07;
+	hdev->le_adv_min_interval = 0x0800;
+	hdev->le_adv_max_interval = 0x0800;
+	hdev->le_scan_interval = 0x0060;
+	hdev->le_scan_window = 0x0030;
+	hdev->le_scan_int_suspend = 0x0400;
+	hdev->le_scan_window_suspend = 0x0012;
+	hdev->le_scan_int_discovery = DISCOV_LE_SCAN_INT;
+	hdev->le_scan_window_discovery = DISCOV_LE_SCAN_WIN;
+	hdev->le_scan_int_connect = 0x0060;
+	hdev->le_scan_window_connect = 0x0060;
+	hdev->le_conn_min_interval = 0x0018;
+	hdev->le_conn_max_interval = 0x0028;
+	hdev->le_conn_latency = 0x0000;
+	hdev->le_supv_timeout = 0x002a;
+	hdev->le_def_tx_len = 0x001b;
+	hdev->le_def_tx_time = 0x0148;
+	hdev->le_max_tx_len = 0x001b;
+	hdev->le_max_tx_time = 0x0148;
+	hdev->le_max_rx_len = 0x001b;
+	hdev->le_max_rx_time = 0x0148;
+	hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE;
+	hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE;
+	hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
+	hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
+	hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES;
+	hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION;
+	hdev->def_le_autoconnect_timeout = HCI_LE_AUTOCONN_TIMEOUT;
+
+	hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
+	hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
+	hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
+	hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
+	hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
+	hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE;
+
+	/* default 1.28 sec page scan */
+	hdev->def_page_scan_type = PAGE_SCAN_TYPE_STANDARD;
+	hdev->def_page_scan_int = 0x0800;
+	hdev->def_page_scan_window = 0x0012;
+
+	mutex_init(&hdev->lock);
+	mutex_init(&hdev->req_lock);
+
+	INIT_LIST_HEAD(&hdev->mgmt_pending);
+	INIT_LIST_HEAD(&hdev->reject_list);
+	INIT_LIST_HEAD(&hdev->accept_list);
+	INIT_LIST_HEAD(&hdev->uuids);
+	INIT_LIST_HEAD(&hdev->link_keys);
+	INIT_LIST_HEAD(&hdev->long_term_keys);
+	INIT_LIST_HEAD(&hdev->identity_resolving_keys);
+	INIT_LIST_HEAD(&hdev->remote_oob_data);
+	INIT_LIST_HEAD(&hdev->le_accept_list);
+	INIT_LIST_HEAD(&hdev->le_resolv_list);
+	INIT_LIST_HEAD(&hdev->le_conn_params);
+	INIT_LIST_HEAD(&hdev->pend_le_conns);
+	INIT_LIST_HEAD(&hdev->pend_le_reports);
+	INIT_LIST_HEAD(&hdev->conn_hash.list);
+	INIT_LIST_HEAD(&hdev->adv_instances);
+	INIT_LIST_HEAD(&hdev->blocked_keys);
+
+	INIT_WORK(&hdev->rx_work, hci_rx_work);
+	INIT_WORK(&hdev->cmd_work, hci_cmd_work);
+	INIT_WORK(&hdev->tx_work, hci_tx_work);
+	INIT_WORK(&hdev->power_on, hci_power_on);
+	INIT_WORK(&hdev->error_reset, hci_error_reset);
+	INIT_WORK(&hdev->suspend_prepare, hci_prepare_suspend);
+
+	INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
+
+	skb_queue_head_init(&hdev->rx_q);
+	skb_queue_head_init(&hdev->cmd_q);
+	skb_queue_head_init(&hdev->raw_q);
+
+	init_waitqueue_head(&hdev->req_wait_q);
+	init_waitqueue_head(&hdev->suspend_wait_q);
+
+	INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
+
+	hci_request_setup(hdev);
+
+	hci_init_sysfs(hdev);
+	discovery_init(hdev);
+
+	return hdev;
+}
+EXPORT_SYMBOL(hci_alloc_dev);
+
+/* Free HCI device */
+void hci_free_dev(struct hci_dev *hdev)
+{
+	/* will free via device release */
+	put_device(&hdev->dev);
+}
+EXPORT_SYMBOL(hci_free_dev);
+
+/* Register HCI device */
+int hci_register_dev(struct hci_dev *hdev)
+{
+	int id, error;
+
+	if (!hdev->open || !hdev->close || !hdev->send)
+		return -EINVAL;
+
+	/* Do not allow HCI_AMP devices to register at index 0,
+	 * so the index can be used as the AMP controller ID.
+	 */
+	switch (hdev->dev_type) {
+	case HCI_PRIMARY:
+		id = ida_simple_get(&hci_index_ida, 0, HCI_MAX_ID, GFP_KERNEL);
+		break;
+	case HCI_AMP:
+		id = ida_simple_get(&hci_index_ida, 1, HCI_MAX_ID, GFP_KERNEL);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (id < 0)
+		return id;
+
+	error = dev_set_name(&hdev->dev, "hci%u", id);
+	if (error)
+		return error;
+
+	hdev->name = dev_name(&hdev->dev);
+	hdev->id = id;
+
+	BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
+
+	hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name);
+	if (!hdev->workqueue) {
+		error = -ENOMEM;
+		goto err;
+	}
+
+	hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI,
+						      hdev->name);
+	if (!hdev->req_workqueue) {
+		destroy_workqueue(hdev->workqueue);
+		error = -ENOMEM;
+		goto err;
+	}
+
+	if (!IS_ERR_OR_NULL(bt_debugfs))
+		hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
+
+	error = device_add(&hdev->dev);
+	if (error < 0)
+		goto err_wqueue;
+
+	hci_leds_init(hdev);
+
+	hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
+				    RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
+				    hdev);
+	if (hdev->rfkill) {
+		if (rfkill_register(hdev->rfkill) < 0) {
+			rfkill_destroy(hdev->rfkill);
+			hdev->rfkill = NULL;
+		}
+	}
+
+	if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
+		hci_dev_set_flag(hdev, HCI_RFKILLED);
+
+	hci_dev_set_flag(hdev, HCI_SETUP);
+	hci_dev_set_flag(hdev, HCI_AUTO_OFF);
+
+	if (hdev->dev_type == HCI_PRIMARY) {
+		/* Assume BR/EDR support until proven otherwise (such as
+		 * through reading supported features during init.
+		 */
+		hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
+	}
+
+	write_lock(&hci_dev_list_lock);
+	list_add(&hdev->list, &hci_dev_list);
+	write_unlock(&hci_dev_list_lock);
+
+	/* Devices that are marked for raw-only usage are unconfigured
+	 * and should not be included in normal operation.
+	 */
+	if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
+		hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
+
+	hci_sock_dev_event(hdev, HCI_DEV_REG);
+	hci_dev_hold(hdev);
+
+	if (!hdev->suspend_notifier.notifier_call &&
+	    !test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks)) {
+		hdev->suspend_notifier.notifier_call = hci_suspend_notifier;
+		error = register_pm_notifier(&hdev->suspend_notifier);
+		if (error)
+			goto err_wqueue;
+	}
+
+	queue_work(hdev->req_workqueue, &hdev->power_on);
+
+	idr_init(&hdev->adv_monitors_idr);
+
+	return id;
+
+err_wqueue:
+	debugfs_remove_recursive(hdev->debugfs);
+	destroy_workqueue(hdev->workqueue);
+	destroy_workqueue(hdev->req_workqueue);
+err:
+	ida_simple_remove(&hci_index_ida, hdev->id);
+
+	return error;
+}
+EXPORT_SYMBOL(hci_register_dev);
+
+/* Unregister HCI device */
+void hci_unregister_dev(struct hci_dev *hdev)
+{
+	BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
+
+	hci_dev_set_flag(hdev, HCI_UNREGISTER);
+
+	write_lock(&hci_dev_list_lock);
+	list_del(&hdev->list);
+	write_unlock(&hci_dev_list_lock);
+
+	cancel_work_sync(&hdev->power_on);
+
+	if (!test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks)) {
+		hci_suspend_clear_tasks(hdev);
+		unregister_pm_notifier(&hdev->suspend_notifier);
+		cancel_work_sync(&hdev->suspend_prepare);
+	}
+
+	hci_dev_do_close(hdev);
+
+	if (!test_bit(HCI_INIT, &hdev->flags) &&
+	    !hci_dev_test_flag(hdev, HCI_SETUP) &&
+	    !hci_dev_test_flag(hdev, HCI_CONFIG)) {
+		hci_dev_lock(hdev);
+		mgmt_index_removed(hdev);
+		hci_dev_unlock(hdev);
+	}
+
+	/* mgmt_index_removed should take care of emptying the
+	 * pending list */
+	BUG_ON(!list_empty(&hdev->mgmt_pending));
+
+	hci_sock_dev_event(hdev, HCI_DEV_UNREG);
+
+	if (hdev->rfkill) {
+		rfkill_unregister(hdev->rfkill);
+		rfkill_destroy(hdev->rfkill);
+	}
+
+	device_del(&hdev->dev);
+	/* Actual cleanup is deferred until hci_cleanup_dev(). */
+	hci_dev_put(hdev);
+}
+EXPORT_SYMBOL(hci_unregister_dev);
+
+/* Cleanup HCI device */
+void hci_cleanup_dev(struct hci_dev *hdev)
+{
+	debugfs_remove_recursive(hdev->debugfs);
+	kfree_const(hdev->hw_info);
+	kfree_const(hdev->fw_info);
+
+	destroy_workqueue(hdev->workqueue);
+	destroy_workqueue(hdev->req_workqueue);
+
+	hci_dev_lock(hdev);
+	hci_bdaddr_list_clear(&hdev->reject_list);
+	hci_bdaddr_list_clear(&hdev->accept_list);
+	hci_uuids_clear(hdev);
+	hci_link_keys_clear(hdev);
+	hci_smp_ltks_clear(hdev);
+	hci_smp_irks_clear(hdev);
+	hci_remote_oob_data_clear(hdev);
+	hci_adv_instances_clear(hdev);
+	hci_adv_monitors_clear(hdev);
+	hci_bdaddr_list_clear(&hdev->le_accept_list);
+	hci_bdaddr_list_clear(&hdev->le_resolv_list);
+	hci_conn_params_clear_all(hdev);
+	hci_discovery_filter_clear(hdev);
+	hci_blocked_keys_clear(hdev);
+	hci_dev_unlock(hdev);
+
+	ida_simple_remove(&hci_index_ida, hdev->id);
+}
+
+/* Suspend HCI device */
+int hci_suspend_dev(struct hci_dev *hdev)
+{
+	hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
+	return 0;
+}
+EXPORT_SYMBOL(hci_suspend_dev);
+
+/* Resume HCI device */
+int hci_resume_dev(struct hci_dev *hdev)
+{
+	hci_sock_dev_event(hdev, HCI_DEV_RESUME);
+	return 0;
+}
+EXPORT_SYMBOL(hci_resume_dev);
+
+/* Reset HCI device */
+int hci_reset_dev(struct hci_dev *hdev)
+{
+	static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
+	struct sk_buff *skb;
+
+	skb = bt_skb_alloc(3, GFP_ATOMIC);
+	if (!skb)
+		return -ENOMEM;
+
+	hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
+	skb_put_data(skb, hw_err, 3);
+
+	/* Send Hardware Error to upper stack */
+	return hci_recv_frame(hdev, skb);
+}
+EXPORT_SYMBOL(hci_reset_dev);
+
+/* Receive frame from HCI drivers */
+int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
+		      && !test_bit(HCI_INIT, &hdev->flags))) {
+		kfree_skb(skb);
+		return -ENXIO;
+	}
+
+	if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
+	    hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
+	    hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
+	    hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
+		kfree_skb(skb);
+		return -EINVAL;
+	}
+
+	/* Incoming skb */
+	bt_cb(skb)->incoming = 1;
+
+	/* Time stamp */
+	__net_timestamp(skb);
+
+	skb_queue_tail(&hdev->rx_q, skb);
+	queue_work(hdev->workqueue, &hdev->rx_work);
+
+	return 0;
+}
+EXPORT_SYMBOL(hci_recv_frame);
+
+/* Receive diagnostic message from HCI drivers */
+int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	/* Mark as diagnostic packet */
+	hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
+
+	/* Time stamp */
+	__net_timestamp(skb);
+
+	skb_queue_tail(&hdev->rx_q, skb);
+	queue_work(hdev->workqueue, &hdev->rx_work);
+
+	return 0;
+}
+EXPORT_SYMBOL(hci_recv_diag);
+
+void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
+{
+	va_list vargs;
+
+	va_start(vargs, fmt);
+	kfree_const(hdev->hw_info);
+	hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
+	va_end(vargs);
+}
+EXPORT_SYMBOL(hci_set_hw_info);
+
+void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
+{
+	va_list vargs;
+
+	va_start(vargs, fmt);
+	kfree_const(hdev->fw_info);
+	hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
+	va_end(vargs);
+}
+EXPORT_SYMBOL(hci_set_fw_info);
+
+/* ---- Interface to upper protocols ---- */
+
+int hci_register_cb(struct hci_cb *cb)
+{
+	BT_DBG("%p name %s", cb, cb->name);
+
+	mutex_lock(&hci_cb_list_lock);
+	list_add_tail(&cb->list, &hci_cb_list);
+	mutex_unlock(&hci_cb_list_lock);
+
+	return 0;
+}
+EXPORT_SYMBOL(hci_register_cb);
+
+int hci_unregister_cb(struct hci_cb *cb)
+{
+	BT_DBG("%p name %s", cb, cb->name);
+
+	mutex_lock(&hci_cb_list_lock);
+	list_del(&cb->list);
+	mutex_unlock(&hci_cb_list_lock);
+
+	return 0;
+}
+EXPORT_SYMBOL(hci_unregister_cb);
+
+static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	int err;
+
+	BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
+	       skb->len);
+
+	/* Time stamp */
+	__net_timestamp(skb);
+
+	/* Send copy to monitor */
+	hci_send_to_monitor(hdev, skb);
+
+	if (atomic_read(&hdev->promisc)) {
+		/* Send copy to the sockets */
+		hci_send_to_sock(hdev, skb);
+	}
+
+	/* Get rid of skb owner, prior to sending to the driver. */
+	skb_orphan(skb);
+
+	if (!test_bit(HCI_RUNNING, &hdev->flags)) {
+		kfree_skb(skb);
+		return;
+	}
+
+	err = hdev->send(hdev, skb);
+	if (err < 0) {
+		bt_dev_err(hdev, "sending frame failed (%d)", err);
+		kfree_skb(skb);
+	}
+}
+
+/* Send HCI command */
+int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
+		 const void *param)
+{
+	struct sk_buff *skb;
+
+	BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
+
+	skb = hci_prepare_cmd(hdev, opcode, plen, param);
+	if (!skb) {
+		bt_dev_err(hdev, "no memory for command");
+		return -ENOMEM;
+	}
+
+	/* Stand-alone HCI commands must be flagged as
+	 * single-command requests.
+	 */
+	bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
+
+	skb_queue_tail(&hdev->cmd_q, skb);
+	queue_work(hdev->workqueue, &hdev->cmd_work);
+
+	return 0;
+}
+
+int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
+		   const void *param)
+{
+	struct sk_buff *skb;
+
+	if (hci_opcode_ogf(opcode) != 0x3f) {
+		/* A controller receiving a command shall respond with either
+		 * a Command Status Event or a Command Complete Event.
+		 * Therefore, all standard HCI commands must be sent via the
+		 * standard API, using hci_send_cmd or hci_cmd_sync helpers.
+		 * Some vendors do not comply with this rule for vendor-specific
+		 * commands and do not return any event. We want to support
+		 * unresponded commands for such cases only.
+		 */
+		bt_dev_err(hdev, "unresponded command not supported");
+		return -EINVAL;
+	}
+
+	skb = hci_prepare_cmd(hdev, opcode, plen, param);
+	if (!skb) {
+		bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
+			   opcode);
+		return -ENOMEM;
+	}
+
+	hci_send_frame(hdev, skb);
+
+	return 0;
+}
+EXPORT_SYMBOL(__hci_cmd_send);
+
+/* Get data from the previously sent command */
+void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
+{
+	struct hci_command_hdr *hdr;
+
+	if (!hdev->sent_cmd)
+		return NULL;
+
+	hdr = (void *) hdev->sent_cmd->data;
+
+	if (hdr->opcode != cpu_to_le16(opcode))
+		return NULL;
+
+	BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
+
+	return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
+}
+
+/* Send HCI command and wait for command commplete event */
+struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
+			     const void *param, u32 timeout)
+{
+	struct sk_buff *skb;
+
+	if (!test_bit(HCI_UP, &hdev->flags))
+		return ERR_PTR(-ENETDOWN);
+
+	bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
+
+	hci_req_sync_lock(hdev);
+	skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
+	hci_req_sync_unlock(hdev);
+
+	return skb;
+}
+EXPORT_SYMBOL(hci_cmd_sync);
+
+/* Send ACL data */
+static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
+{
+	struct hci_acl_hdr *hdr;
+	int len = skb->len;
+
+	skb_push(skb, HCI_ACL_HDR_SIZE);
+	skb_reset_transport_header(skb);
+	hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
+	hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
+	hdr->dlen   = cpu_to_le16(len);
+}
+
+static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
+			  struct sk_buff *skb, __u16 flags)
+{
+	struct hci_conn *conn = chan->conn;
+	struct hci_dev *hdev = conn->hdev;
+	struct sk_buff *list;
+
+	skb->len = skb_headlen(skb);
+	skb->data_len = 0;
+
+	hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
+
+	switch (hdev->dev_type) {
+	case HCI_PRIMARY:
+		hci_add_acl_hdr(skb, conn->handle, flags);
+		break;
+	case HCI_AMP:
+		hci_add_acl_hdr(skb, chan->handle, flags);
+		break;
+	default:
+		bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
+		return;
+	}
+
+	list = skb_shinfo(skb)->frag_list;
+	if (!list) {
+		/* Non fragmented */
+		BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
+
+		skb_queue_tail(queue, skb);
+	} else {
+		/* Fragmented */
+		BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
+
+		skb_shinfo(skb)->frag_list = NULL;
+
+		/* Queue all fragments atomically. We need to use spin_lock_bh
+		 * here because of 6LoWPAN links, as there this function is
+		 * called from softirq and using normal spin lock could cause
+		 * deadlocks.
+		 */
+		spin_lock_bh(&queue->lock);
+
+		__skb_queue_tail(queue, skb);
+
+		flags &= ~ACL_START;
+		flags |= ACL_CONT;
+		do {
+			skb = list; list = list->next;
+
+			hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
+			hci_add_acl_hdr(skb, conn->handle, flags);
+
+			BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
+
+			__skb_queue_tail(queue, skb);
+		} while (list);
+
+		spin_unlock_bh(&queue->lock);
+	}
+}
+
+void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
+{
+	struct hci_dev *hdev = chan->conn->hdev;
+
+	BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
+
+	hci_queue_acl(chan, &chan->data_q, skb, flags);
+
+	queue_work(hdev->workqueue, &hdev->tx_work);
+}
+
+/* Send SCO data */
+void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct hci_sco_hdr hdr;
+
+	BT_DBG("%s len %d", hdev->name, skb->len);
+
+	hdr.handle = cpu_to_le16(conn->handle);
+	hdr.dlen   = skb->len;
+
+	skb_push(skb, HCI_SCO_HDR_SIZE);
+	skb_reset_transport_header(skb);
+	memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
+
+	hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
+
+	skb_queue_tail(&conn->data_q, skb);
+	queue_work(hdev->workqueue, &hdev->tx_work);
+}
+
+/* ---- HCI TX task (outgoing data) ---- */
+
+/* HCI Connection scheduler */
+static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
+				     int *quote)
+{
+	struct hci_conn_hash *h = &hdev->conn_hash;
+	struct hci_conn *conn = NULL, *c;
+	unsigned int num = 0, min = ~0;
+
+	/* We don't have to lock device here. Connections are always
+	 * added and removed with TX task disabled. */
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(c, &h->list, list) {
+		if (c->type != type || skb_queue_empty(&c->data_q))
+			continue;
+
+		if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
+			continue;
+
+		num++;
+
+		if (c->sent < min) {
+			min  = c->sent;
+			conn = c;
+		}
+
+		if (hci_conn_num(hdev, type) == num)
+			break;
+	}
+
+	rcu_read_unlock();
+
+	if (conn) {
+		int cnt, q;
+
+		switch (conn->type) {
+		case ACL_LINK:
+			cnt = hdev->acl_cnt;
+			break;
+		case SCO_LINK:
+		case ESCO_LINK:
+			cnt = hdev->sco_cnt;
+			break;
+		case LE_LINK:
+			cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
+			break;
+		default:
+			cnt = 0;
+			bt_dev_err(hdev, "unknown link type %d", conn->type);
+		}
+
+		q = cnt / num;
+		*quote = q ? q : 1;
+	} else
+		*quote = 0;
+
+	BT_DBG("conn %p quote %d", conn, *quote);
+	return conn;
+}
+
+static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
+{
+	struct hci_conn_hash *h = &hdev->conn_hash;
+	struct hci_conn *c;
+
+	bt_dev_err(hdev, "link tx timeout");
+
+	rcu_read_lock();
+
+	/* Kill stalled connections */
+	list_for_each_entry_rcu(c, &h->list, list) {
+		if (c->type == type && c->sent) {
+			bt_dev_err(hdev, "killing stalled connection %pMR",
+				   &c->dst);
+			hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
+		}
+	}
+
+	rcu_read_unlock();
+}
+
+static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
+				      int *quote)
+{
+	struct hci_conn_hash *h = &hdev->conn_hash;
+	struct hci_chan *chan = NULL;
+	unsigned int num = 0, min = ~0, cur_prio = 0;
+	struct hci_conn *conn;
+	int cnt, q, conn_num = 0;
+
+	BT_DBG("%s", hdev->name);
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(conn, &h->list, list) {
+		struct hci_chan *tmp;
+
+		if (conn->type != type)
+			continue;
+
+		if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
+			continue;
+
+		conn_num++;
+
+		list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
+			struct sk_buff *skb;
+
+			if (skb_queue_empty(&tmp->data_q))
+				continue;
+
+			skb = skb_peek(&tmp->data_q);
+			if (skb->priority < cur_prio)
+				continue;
+
+			if (skb->priority > cur_prio) {
+				num = 0;
+				min = ~0;
+				cur_prio = skb->priority;
+			}
+
+			num++;
+
+			if (conn->sent < min) {
+				min  = conn->sent;
+				chan = tmp;
+			}
+		}
+
+		if (hci_conn_num(hdev, type) == conn_num)
+			break;
+	}
+
+	rcu_read_unlock();
+
+	if (!chan)
+		return NULL;
+
+	switch (chan->conn->type) {
+	case ACL_LINK:
+		cnt = hdev->acl_cnt;
+		break;
+	case AMP_LINK:
+		cnt = hdev->block_cnt;
+		break;
+	case SCO_LINK:
+	case ESCO_LINK:
+		cnt = hdev->sco_cnt;
+		break;
+	case LE_LINK:
+		cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
+		break;
+	default:
+		cnt = 0;
+		bt_dev_err(hdev, "unknown link type %d", chan->conn->type);
+	}
+
+	q = cnt / num;
+	*quote = q ? q : 1;
+	BT_DBG("chan %p quote %d", chan, *quote);
+	return chan;
+}
+
+static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
+{
+	struct hci_conn_hash *h = &hdev->conn_hash;
+	struct hci_conn *conn;
+	int num = 0;
+
+	BT_DBG("%s", hdev->name);
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(conn, &h->list, list) {
+		struct hci_chan *chan;
+
+		if (conn->type != type)
+			continue;
+
+		if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
+			continue;
+
+		num++;
+
+		list_for_each_entry_rcu(chan, &conn->chan_list, list) {
+			struct sk_buff *skb;
+
+			if (chan->sent) {
+				chan->sent = 0;
+				continue;
+			}
+
+			if (skb_queue_empty(&chan->data_q))
+				continue;
+
+			skb = skb_peek(&chan->data_q);
+			if (skb->priority >= HCI_PRIO_MAX - 1)
+				continue;
+
+			skb->priority = HCI_PRIO_MAX - 1;
+
+			BT_DBG("chan %p skb %p promoted to %d", chan, skb,
+			       skb->priority);
+		}
+
+		if (hci_conn_num(hdev, type) == num)
+			break;
+	}
+
+	rcu_read_unlock();
+
+}
+
+static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	/* Calculate count of blocks used by this packet */
+	return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
+}
+
+static void __check_timeout(struct hci_dev *hdev, unsigned int cnt, u8 type)
+{
+	unsigned long last_tx;
+
+	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
+		return;
+
+	switch (type) {
+	case LE_LINK:
+		last_tx = hdev->le_last_tx;
+		break;
+	default:
+		last_tx = hdev->acl_last_tx;
+		break;
+	}
+
+	/* tx timeout must be longer than maximum link supervision timeout
+	 * (40.9 seconds)
+	 */
+	if (!cnt && time_after(jiffies, last_tx + HCI_ACL_TX_TIMEOUT))
+		hci_link_tx_to(hdev, type);
+}
+
+/* Schedule SCO */
+static void hci_sched_sco(struct hci_dev *hdev)
+{
+	struct hci_conn *conn;
+	struct sk_buff *skb;
+	int quote;
+
+	BT_DBG("%s", hdev->name);
+
+	if (!hci_conn_num(hdev, SCO_LINK))
+		return;
+
+	while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
+		while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
+			BT_DBG("skb %p len %d", skb, skb->len);
+			hci_send_frame(hdev, skb);
+
+			conn->sent++;
+			if (conn->sent == ~0)
+				conn->sent = 0;
+		}
+	}
+}
+
+static void hci_sched_esco(struct hci_dev *hdev)
+{
+	struct hci_conn *conn;
+	struct sk_buff *skb;
+	int quote;
+
+	BT_DBG("%s", hdev->name);
+
+	if (!hci_conn_num(hdev, ESCO_LINK))
+		return;
+
+	while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
+						     &quote))) {
+		while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
+			BT_DBG("skb %p len %d", skb, skb->len);
+			hci_send_frame(hdev, skb);
+
+			conn->sent++;
+			if (conn->sent == ~0)
+				conn->sent = 0;
+		}
+	}
+}
+
+static void hci_sched_acl_pkt(struct hci_dev *hdev)
+{
+	unsigned int cnt = hdev->acl_cnt;
+	struct hci_chan *chan;
+	struct sk_buff *skb;
+	int quote;
+
+	__check_timeout(hdev, cnt, ACL_LINK);
+
+	while (hdev->acl_cnt &&
+	       (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
+		u32 priority = (skb_peek(&chan->data_q))->priority;
+		while (quote-- && (skb = skb_peek(&chan->data_q))) {
+			BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
+			       skb->len, skb->priority);
+
+			/* Stop if priority has changed */
+			if (skb->priority < priority)
+				break;
+
+			skb = skb_dequeue(&chan->data_q);
+
+			hci_conn_enter_active_mode(chan->conn,
+						   bt_cb(skb)->force_active);
+
+			hci_send_frame(hdev, skb);
+			hdev->acl_last_tx = jiffies;
+
+			hdev->acl_cnt--;
+			chan->sent++;
+			chan->conn->sent++;
+
+			/* Send pending SCO packets right away */
+			hci_sched_sco(hdev);
+			hci_sched_esco(hdev);
+		}
+	}
+
+	if (cnt != hdev->acl_cnt)
+		hci_prio_recalculate(hdev, ACL_LINK);
+}
+
+static void hci_sched_acl_blk(struct hci_dev *hdev)
+{
+	unsigned int cnt = hdev->block_cnt;
+	struct hci_chan *chan;
+	struct sk_buff *skb;
+	int quote;
+	u8 type;
+
+	BT_DBG("%s", hdev->name);
+
+	if (hdev->dev_type == HCI_AMP)
+		type = AMP_LINK;
+	else
+		type = ACL_LINK;
+
+	__check_timeout(hdev, cnt, type);
+
+	while (hdev->block_cnt > 0 &&
+	       (chan = hci_chan_sent(hdev, type, &quote))) {
+		u32 priority = (skb_peek(&chan->data_q))->priority;
+		while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
+			int blocks;
+
+			BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
+			       skb->len, skb->priority);
+
+			/* Stop if priority has changed */
+			if (skb->priority < priority)
+				break;
+
+			skb = skb_dequeue(&chan->data_q);
+
+			blocks = __get_blocks(hdev, skb);
+			if (blocks > hdev->block_cnt)
+				return;
+
+			hci_conn_enter_active_mode(chan->conn,
+						   bt_cb(skb)->force_active);
+
+			hci_send_frame(hdev, skb);
+			hdev->acl_last_tx = jiffies;
+
+			hdev->block_cnt -= blocks;
+			quote -= blocks;
+
+			chan->sent += blocks;
+			chan->conn->sent += blocks;
+		}
+	}
+
+	if (cnt != hdev->block_cnt)
+		hci_prio_recalculate(hdev, type);
+}
+
+static void hci_sched_acl(struct hci_dev *hdev)
+{
+	BT_DBG("%s", hdev->name);
+
+	/* No ACL link over BR/EDR controller */
+	if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_PRIMARY)
+		return;
+
+	/* No AMP link over AMP controller */
+	if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
+		return;
+
+	switch (hdev->flow_ctl_mode) {
+	case HCI_FLOW_CTL_MODE_PACKET_BASED:
+		hci_sched_acl_pkt(hdev);
+		break;
+
+	case HCI_FLOW_CTL_MODE_BLOCK_BASED:
+		hci_sched_acl_blk(hdev);
+		break;
+	}
+}
+
+static void hci_sched_le(struct hci_dev *hdev)
+{
+	struct hci_chan *chan;
+	struct sk_buff *skb;
+	int quote, cnt, tmp;
+
+	BT_DBG("%s", hdev->name);
+
+	if (!hci_conn_num(hdev, LE_LINK))
+		return;
+
+	cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
+
+	__check_timeout(hdev, cnt, LE_LINK);
+
+	tmp = cnt;
+	while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
+		u32 priority = (skb_peek(&chan->data_q))->priority;
+		while (quote-- && (skb = skb_peek(&chan->data_q))) {
+			BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
+			       skb->len, skb->priority);
+
+			/* Stop if priority has changed */
+			if (skb->priority < priority)
+				break;
+
+			skb = skb_dequeue(&chan->data_q);
+
+			hci_send_frame(hdev, skb);
+			hdev->le_last_tx = jiffies;
+
+			cnt--;
+			chan->sent++;
+			chan->conn->sent++;
+
+			/* Send pending SCO packets right away */
+			hci_sched_sco(hdev);
+			hci_sched_esco(hdev);
+		}
+	}
+
+	if (hdev->le_pkts)
+		hdev->le_cnt = cnt;
+	else
+		hdev->acl_cnt = cnt;
+
+	if (cnt != tmp)
+		hci_prio_recalculate(hdev, LE_LINK);
+}
+
+static void hci_tx_work(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
+	struct sk_buff *skb;
+
+	BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
+	       hdev->sco_cnt, hdev->le_cnt);
+
+	if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
+		/* Schedule queues and send stuff to HCI driver */
+		hci_sched_sco(hdev);
+		hci_sched_esco(hdev);
+		hci_sched_acl(hdev);
+		hci_sched_le(hdev);
+	}
+
+	/* Send next queued raw (unknown type) packet */
+	while ((skb = skb_dequeue(&hdev->raw_q)))
+		hci_send_frame(hdev, skb);
+}
+
+/* ----- HCI RX task (incoming data processing) ----- */
+
+/* ACL data packet */
+static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_acl_hdr *hdr = (void *) skb->data;
+	struct hci_conn *conn;
+	__u16 handle, flags;
+
+	skb_pull(skb, HCI_ACL_HDR_SIZE);
+
+	handle = __le16_to_cpu(hdr->handle);
+	flags  = hci_flags(handle);
+	handle = hci_handle(handle);
+
+	BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
+	       handle, flags);
+
+	hdev->stat.acl_rx++;
+
+	hci_dev_lock(hdev);
+	conn = hci_conn_hash_lookup_handle(hdev, handle);
+	hci_dev_unlock(hdev);
+
+	if (conn) {
+		hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
+
+		/* Send to upper protocol */
+		l2cap_recv_acldata(conn, skb, flags);
+		return;
+	} else {
+		bt_dev_err(hdev, "ACL packet for unknown connection handle %d",
+			   handle);
+	}
+
+	kfree_skb(skb);
+}
+
+/* SCO data packet */
+static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_sco_hdr *hdr = (void *) skb->data;
+	struct hci_conn *conn;
+	__u16 handle, flags;
+
+	skb_pull(skb, HCI_SCO_HDR_SIZE);
+
+	handle = __le16_to_cpu(hdr->handle);
+	flags  = hci_flags(handle);
+	handle = hci_handle(handle);
+
+	BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
+	       handle, flags);
+
+	hdev->stat.sco_rx++;
+
+	hci_dev_lock(hdev);
+	conn = hci_conn_hash_lookup_handle(hdev, handle);
+	hci_dev_unlock(hdev);
+
+	if (conn) {
+		/* Send to upper protocol */
+		bt_cb(skb)->sco.pkt_status = flags & 0x03;
+		sco_recv_scodata(conn, skb);
+		return;
+	} else {
+		bt_dev_err(hdev, "SCO packet for unknown connection handle %d",
+			   handle);
+	}
+
+	kfree_skb(skb);
+}
+
+static bool hci_req_is_complete(struct hci_dev *hdev)
+{
+	struct sk_buff *skb;
+
+	skb = skb_peek(&hdev->cmd_q);
+	if (!skb)
+		return true;
+
+	return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
+}
+
+static void hci_resend_last(struct hci_dev *hdev)
+{
+	struct hci_command_hdr *sent;
+	struct sk_buff *skb;
+	u16 opcode;
+
+	if (!hdev->sent_cmd)
+		return;
+
+	sent = (void *) hdev->sent_cmd->data;
+	opcode = __le16_to_cpu(sent->opcode);
+	if (opcode == HCI_OP_RESET)
+		return;
+
+	skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
+	if (!skb)
+		return;
+
+	skb_queue_head(&hdev->cmd_q, skb);
+	queue_work(hdev->workqueue, &hdev->cmd_work);
+}
+
+void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
+			  hci_req_complete_t *req_complete,
+			  hci_req_complete_skb_t *req_complete_skb)
+{
+	struct sk_buff *skb;
+	unsigned long flags;
+
+	BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
+
+	/* If the completed command doesn't match the last one that was
+	 * sent we need to do special handling of it.
+	 */
+	if (!hci_sent_cmd_data(hdev, opcode)) {
+		/* Some CSR based controllers generate a spontaneous
+		 * reset complete event during init and any pending
+		 * command will never be completed. In such a case we
+		 * need to resend whatever was the last sent
+		 * command.
+		 */
+		if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
+			hci_resend_last(hdev);
+
+		return;
+	}
+
+	/* If we reach this point this event matches the last command sent */
+	hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
+
+	/* If the command succeeded and there's still more commands in
+	 * this request the request is not yet complete.
+	 */
+	if (!status && !hci_req_is_complete(hdev))
+		return;
+
+	/* If this was the last command in a request the complete
+	 * callback would be found in hdev->sent_cmd instead of the
+	 * command queue (hdev->cmd_q).
+	 */
+	if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
+		*req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
+		return;
+	}
+
+	if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
+		*req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
+		return;
+	}
+
+	/* Remove all pending commands belonging to this request */
+	spin_lock_irqsave(&hdev->cmd_q.lock, flags);
+	while ((skb = __skb_dequeue(&hdev->cmd_q))) {
+		if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
+			__skb_queue_head(&hdev->cmd_q, skb);
+			break;
+		}
+
+		if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
+			*req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
+		else
+			*req_complete = bt_cb(skb)->hci.req_complete;
+		dev_kfree_skb_irq(skb);
+	}
+	spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
+}
+
+static void hci_rx_work(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
+	struct sk_buff *skb;
+
+	BT_DBG("%s", hdev->name);
+
+	while ((skb = skb_dequeue(&hdev->rx_q))) {
+		/* Send copy to monitor */
+		hci_send_to_monitor(hdev, skb);
+
+		if (atomic_read(&hdev->promisc)) {
+			/* Send copy to the sockets */
+			hci_send_to_sock(hdev, skb);
+		}
+
+		/* If the device has been opened in HCI_USER_CHANNEL,
+		 * the userspace has exclusive access to device.
+		 * When device is HCI_INIT, we still need to process
+		 * the data packets to the driver in order
+		 * to complete its setup().
+		 */
+		if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
+		    !test_bit(HCI_INIT, &hdev->flags)) {
+			kfree_skb(skb);
+			continue;
+		}
+
+		if (test_bit(HCI_INIT, &hdev->flags)) {
+			/* Don't process data packets in this states. */
+			switch (hci_skb_pkt_type(skb)) {
+			case HCI_ACLDATA_PKT:
+			case HCI_SCODATA_PKT:
+			case HCI_ISODATA_PKT:
+				kfree_skb(skb);
+				continue;
+			}
+		}
+
+		/* Process frame */
+		switch (hci_skb_pkt_type(skb)) {
+		case HCI_EVENT_PKT:
+			BT_DBG("%s Event packet", hdev->name);
+			hci_event_packet(hdev, skb);
+			break;
+
+		case HCI_ACLDATA_PKT:
+			BT_DBG("%s ACL data packet", hdev->name);
+			hci_acldata_packet(hdev, skb);
+			break;
+
+		case HCI_SCODATA_PKT:
+			BT_DBG("%s SCO data packet", hdev->name);
+			hci_scodata_packet(hdev, skb);
+			break;
+
+		default:
+			kfree_skb(skb);
+			break;
+		}
+	}
+}
+
+static void hci_cmd_work(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
+	struct sk_buff *skb;
+
+	BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
+	       atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
+
+	/* Send queued commands */
+	if (atomic_read(&hdev->cmd_cnt)) {
+		skb = skb_dequeue(&hdev->cmd_q);
+		if (!skb)
+			return;
+
+		kfree_skb(hdev->sent_cmd);
+
+		hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
+		if (hdev->sent_cmd) {
+			if (hci_req_status_pend(hdev))
+				hci_dev_set_flag(hdev, HCI_CMD_PENDING);
+			atomic_dec(&hdev->cmd_cnt);
+			hci_send_frame(hdev, skb);
+			if (test_bit(HCI_RESET, &hdev->flags))
+				cancel_delayed_work(&hdev->cmd_timer);
+			else
+				schedule_delayed_work(&hdev->cmd_timer,
+						      HCI_CMD_TIMEOUT);
+		} else {
+			skb_queue_head(&hdev->cmd_q, skb);
+			queue_work(hdev->workqueue, &hdev->cmd_work);
+		}
+	}
+}
diff --git a/net/bluetooth/hci_debugfs.c b/net/bluetooth/hci_debugfs.c
new file mode 100644
index 000000000..d4efc4aa5
--- /dev/null
+++ b/net/bluetooth/hci_debugfs.c
@@ -0,0 +1,1206 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+
+   Copyright (C) 2014 Intel Corporation
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#include <linux/debugfs.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "smp.h"
+#include "hci_debugfs.h"
+
+#define DEFINE_QUIRK_ATTRIBUTE(__name, __quirk)				      \
+static ssize_t __name ## _read(struct file *file,			      \
+				char __user *user_buf,			      \
+				size_t count, loff_t *ppos)		      \
+{									      \
+	struct hci_dev *hdev = file->private_data;			      \
+	char buf[3];							      \
+									      \
+	buf[0] = test_bit(__quirk, &hdev->quirks) ? 'Y' : 'N';		      \
+	buf[1] = '\n';							      \
+	buf[2] = '\0';							      \
+	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);	      \
+}									      \
+									      \
+static ssize_t __name ## _write(struct file *file,			      \
+				 const char __user *user_buf,		      \
+				 size_t count, loff_t *ppos)		      \
+{									      \
+	struct hci_dev *hdev = file->private_data;			      \
+	bool enable;							      \
+	int err;							      \
+									      \
+	if (test_bit(HCI_UP, &hdev->flags))				      \
+		return -EBUSY;						      \
+									      \
+	err = kstrtobool_from_user(user_buf, count, &enable);		      \
+	if (err)							      \
+		return err;						      \
+									      \
+	if (enable == test_bit(__quirk, &hdev->quirks))			      \
+		return -EALREADY;					      \
+									      \
+	change_bit(__quirk, &hdev->quirks);				      \
+									      \
+	return count;							      \
+}									      \
+									      \
+static const struct file_operations __name ## _fops = {			      \
+	.open		= simple_open,					      \
+	.read		= __name ## _read,				      \
+	.write		= __name ## _write,				      \
+	.llseek		= default_llseek,				      \
+}									      \
+
+#define DEFINE_INFO_ATTRIBUTE(__name, __field)				      \
+static int __name ## _show(struct seq_file *f, void *ptr)		      \
+{									      \
+	struct hci_dev *hdev = f->private;				      \
+									      \
+	hci_dev_lock(hdev);						      \
+	seq_printf(f, "%s\n", hdev->__field ? : "");			      \
+	hci_dev_unlock(hdev);						      \
+									      \
+	return 0;							      \
+}									      \
+									      \
+DEFINE_SHOW_ATTRIBUTE(__name)
+
+static int features_show(struct seq_file *f, void *ptr)
+{
+	struct hci_dev *hdev = f->private;
+	u8 p;
+
+	hci_dev_lock(hdev);
+	for (p = 0; p < HCI_MAX_PAGES && p <= hdev->max_page; p++)
+		seq_printf(f, "%2u: %8ph\n", p, hdev->features[p]);
+	if (lmp_le_capable(hdev))
+		seq_printf(f, "LE: %8ph\n", hdev->le_features);
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(features);
+
+static int device_id_show(struct seq_file *f, void *ptr)
+{
+	struct hci_dev *hdev = f->private;
+
+	hci_dev_lock(hdev);
+	seq_printf(f, "%4.4x:%4.4x:%4.4x:%4.4x\n", hdev->devid_source,
+		  hdev->devid_vendor, hdev->devid_product, hdev->devid_version);
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(device_id);
+
+static int device_list_show(struct seq_file *f, void *ptr)
+{
+	struct hci_dev *hdev = f->private;
+	struct hci_conn_params *p;
+	struct bdaddr_list *b;
+
+	hci_dev_lock(hdev);
+	list_for_each_entry(b, &hdev->accept_list, list)
+		seq_printf(f, "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
+	list_for_each_entry(p, &hdev->le_conn_params, list) {
+		seq_printf(f, "%pMR (type %u) %u\n", &p->addr, p->addr_type,
+			   p->auto_connect);
+	}
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(device_list);
+
+static int blacklist_show(struct seq_file *f, void *p)
+{
+	struct hci_dev *hdev = f->private;
+	struct bdaddr_list *b;
+
+	hci_dev_lock(hdev);
+	list_for_each_entry(b, &hdev->reject_list, list)
+		seq_printf(f, "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(blacklist);
+
+static int blocked_keys_show(struct seq_file *f, void *p)
+{
+	struct hci_dev *hdev = f->private;
+	struct blocked_key *key;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(key, &hdev->blocked_keys, list)
+		seq_printf(f, "%u %*phN\n", key->type, 16, key->val);
+	rcu_read_unlock();
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(blocked_keys);
+
+static int uuids_show(struct seq_file *f, void *p)
+{
+	struct hci_dev *hdev = f->private;
+	struct bt_uuid *uuid;
+
+	hci_dev_lock(hdev);
+	list_for_each_entry(uuid, &hdev->uuids, list) {
+		u8 i, val[16];
+
+		/* The Bluetooth UUID values are stored in big endian,
+		 * but with reversed byte order. So convert them into
+		 * the right order for the %pUb modifier.
+		 */
+		for (i = 0; i < 16; i++)
+			val[i] = uuid->uuid[15 - i];
+
+		seq_printf(f, "%pUb\n", val);
+	}
+	hci_dev_unlock(hdev);
+
+       return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(uuids);
+
+static int remote_oob_show(struct seq_file *f, void *ptr)
+{
+	struct hci_dev *hdev = f->private;
+	struct oob_data *data;
+
+	hci_dev_lock(hdev);
+	list_for_each_entry(data, &hdev->remote_oob_data, list) {
+		seq_printf(f, "%pMR (type %u) %u %*phN %*phN %*phN %*phN\n",
+			   &data->bdaddr, data->bdaddr_type, data->present,
+			   16, data->hash192, 16, data->rand192,
+			   16, data->hash256, 16, data->rand256);
+	}
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(remote_oob);
+
+static int conn_info_min_age_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	if (val == 0 || val > hdev->conn_info_max_age)
+		return -EINVAL;
+
+	hci_dev_lock(hdev);
+	hdev->conn_info_min_age = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int conn_info_min_age_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->conn_info_min_age;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(conn_info_min_age_fops, conn_info_min_age_get,
+			conn_info_min_age_set, "%llu\n");
+
+static int conn_info_max_age_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	if (val == 0 || val < hdev->conn_info_min_age)
+		return -EINVAL;
+
+	hci_dev_lock(hdev);
+	hdev->conn_info_max_age = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int conn_info_max_age_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->conn_info_max_age;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(conn_info_max_age_fops, conn_info_max_age_get,
+			conn_info_max_age_set, "%llu\n");
+
+static ssize_t use_debug_keys_read(struct file *file, char __user *user_buf,
+				   size_t count, loff_t *ppos)
+{
+	struct hci_dev *hdev = file->private_data;
+	char buf[3];
+
+	buf[0] = hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS) ? 'Y': 'N';
+	buf[1] = '\n';
+	buf[2] = '\0';
+	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+}
+
+static const struct file_operations use_debug_keys_fops = {
+	.open		= simple_open,
+	.read		= use_debug_keys_read,
+	.llseek		= default_llseek,
+};
+
+static ssize_t sc_only_mode_read(struct file *file, char __user *user_buf,
+				 size_t count, loff_t *ppos)
+{
+	struct hci_dev *hdev = file->private_data;
+	char buf[3];
+
+	buf[0] = hci_dev_test_flag(hdev, HCI_SC_ONLY) ? 'Y': 'N';
+	buf[1] = '\n';
+	buf[2] = '\0';
+	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+}
+
+static const struct file_operations sc_only_mode_fops = {
+	.open		= simple_open,
+	.read		= sc_only_mode_read,
+	.llseek		= default_llseek,
+};
+
+DEFINE_INFO_ATTRIBUTE(hardware_info, hw_info);
+DEFINE_INFO_ATTRIBUTE(firmware_info, fw_info);
+
+void hci_debugfs_create_common(struct hci_dev *hdev)
+{
+	debugfs_create_file("features", 0444, hdev->debugfs, hdev,
+			    &features_fops);
+	debugfs_create_u16("manufacturer", 0444, hdev->debugfs,
+			   &hdev->manufacturer);
+	debugfs_create_u8("hci_version", 0444, hdev->debugfs, &hdev->hci_ver);
+	debugfs_create_u16("hci_revision", 0444, hdev->debugfs, &hdev->hci_rev);
+	debugfs_create_u8("hardware_error", 0444, hdev->debugfs,
+			  &hdev->hw_error_code);
+	debugfs_create_file("device_id", 0444, hdev->debugfs, hdev,
+			    &device_id_fops);
+
+	debugfs_create_file("device_list", 0444, hdev->debugfs, hdev,
+			    &device_list_fops);
+	debugfs_create_file("blacklist", 0444, hdev->debugfs, hdev,
+			    &blacklist_fops);
+	debugfs_create_file("blocked_keys", 0444, hdev->debugfs, hdev,
+			    &blocked_keys_fops);
+	debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops);
+	debugfs_create_file("remote_oob", 0400, hdev->debugfs, hdev,
+			    &remote_oob_fops);
+
+	debugfs_create_file("conn_info_min_age", 0644, hdev->debugfs, hdev,
+			    &conn_info_min_age_fops);
+	debugfs_create_file("conn_info_max_age", 0644, hdev->debugfs, hdev,
+			    &conn_info_max_age_fops);
+
+	if (lmp_ssp_capable(hdev) || lmp_le_capable(hdev))
+		debugfs_create_file("use_debug_keys", 0444, hdev->debugfs,
+				    hdev, &use_debug_keys_fops);
+
+	if (lmp_sc_capable(hdev) || lmp_le_capable(hdev))
+		debugfs_create_file("sc_only_mode", 0444, hdev->debugfs,
+				    hdev, &sc_only_mode_fops);
+
+	if (hdev->hw_info)
+		debugfs_create_file("hardware_info", 0444, hdev->debugfs,
+				    hdev, &hardware_info_fops);
+
+	if (hdev->fw_info)
+		debugfs_create_file("firmware_info", 0444, hdev->debugfs,
+				    hdev, &firmware_info_fops);
+}
+
+static int inquiry_cache_show(struct seq_file *f, void *p)
+{
+	struct hci_dev *hdev = f->private;
+	struct discovery_state *cache = &hdev->discovery;
+	struct inquiry_entry *e;
+
+	hci_dev_lock(hdev);
+
+	list_for_each_entry(e, &cache->all, all) {
+		struct inquiry_data *data = &e->data;
+		seq_printf(f, "%pMR %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
+			   &data->bdaddr,
+			   data->pscan_rep_mode, data->pscan_period_mode,
+			   data->pscan_mode, data->dev_class[2],
+			   data->dev_class[1], data->dev_class[0],
+			   __le16_to_cpu(data->clock_offset),
+			   data->rssi, data->ssp_mode, e->timestamp);
+	}
+
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(inquiry_cache);
+
+static int link_keys_show(struct seq_file *f, void *ptr)
+{
+	struct hci_dev *hdev = f->private;
+	struct link_key *key;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(key, &hdev->link_keys, list)
+		seq_printf(f, "%pMR %u %*phN %u\n", &key->bdaddr, key->type,
+			   HCI_LINK_KEY_SIZE, key->val, key->pin_len);
+	rcu_read_unlock();
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(link_keys);
+
+static int dev_class_show(struct seq_file *f, void *ptr)
+{
+	struct hci_dev *hdev = f->private;
+
+	hci_dev_lock(hdev);
+	seq_printf(f, "0x%.2x%.2x%.2x\n", hdev->dev_class[2],
+		   hdev->dev_class[1], hdev->dev_class[0]);
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(dev_class);
+
+static int voice_setting_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->voice_setting;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(voice_setting_fops, voice_setting_get,
+			NULL, "0x%4.4llx\n");
+
+static ssize_t ssp_debug_mode_read(struct file *file, char __user *user_buf,
+				   size_t count, loff_t *ppos)
+{
+	struct hci_dev *hdev = file->private_data;
+	char buf[3];
+
+	buf[0] = hdev->ssp_debug_mode ? 'Y': 'N';
+	buf[1] = '\n';
+	buf[2] = '\0';
+	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+}
+
+static const struct file_operations ssp_debug_mode_fops = {
+	.open		= simple_open,
+	.read		= ssp_debug_mode_read,
+	.llseek		= default_llseek,
+};
+
+static int auto_accept_delay_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	hdev->auto_accept_delay = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int min_encrypt_key_size_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	if (val < 1 || val > 16)
+		return -EINVAL;
+
+	hci_dev_lock(hdev);
+	hdev->min_enc_key_size = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int min_encrypt_key_size_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->min_enc_key_size;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(min_encrypt_key_size_fops,
+			min_encrypt_key_size_get,
+			min_encrypt_key_size_set, "%llu\n");
+
+static int auto_accept_delay_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->auto_accept_delay;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get,
+			auto_accept_delay_set, "%llu\n");
+
+static int idle_timeout_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	if (val != 0 && (val < 500 || val > 3600000))
+		return -EINVAL;
+
+	hci_dev_lock(hdev);
+	hdev->idle_timeout = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int idle_timeout_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->idle_timeout;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(idle_timeout_fops, idle_timeout_get,
+			idle_timeout_set, "%llu\n");
+
+static int sniff_min_interval_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	if (val == 0 || val % 2 || val > hdev->sniff_max_interval)
+		return -EINVAL;
+
+	hci_dev_lock(hdev);
+	hdev->sniff_min_interval = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int sniff_min_interval_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->sniff_min_interval;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(sniff_min_interval_fops, sniff_min_interval_get,
+			sniff_min_interval_set, "%llu\n");
+
+static int sniff_max_interval_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	if (val == 0 || val % 2 || val < hdev->sniff_min_interval)
+		return -EINVAL;
+
+	hci_dev_lock(hdev);
+	hdev->sniff_max_interval = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int sniff_max_interval_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->sniff_max_interval;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(sniff_max_interval_fops, sniff_max_interval_get,
+			sniff_max_interval_set, "%llu\n");
+
+void hci_debugfs_create_bredr(struct hci_dev *hdev)
+{
+	debugfs_create_file("inquiry_cache", 0444, hdev->debugfs, hdev,
+			    &inquiry_cache_fops);
+	debugfs_create_file("link_keys", 0400, hdev->debugfs, hdev,
+			    &link_keys_fops);
+	debugfs_create_file("dev_class", 0444, hdev->debugfs, hdev,
+			    &dev_class_fops);
+	debugfs_create_file("voice_setting", 0444, hdev->debugfs, hdev,
+			    &voice_setting_fops);
+
+	if (lmp_ssp_capable(hdev)) {
+		debugfs_create_file("ssp_debug_mode", 0444, hdev->debugfs,
+				    hdev, &ssp_debug_mode_fops);
+		debugfs_create_file("min_encrypt_key_size", 0644, hdev->debugfs,
+				    hdev, &min_encrypt_key_size_fops);
+		debugfs_create_file("auto_accept_delay", 0644, hdev->debugfs,
+				    hdev, &auto_accept_delay_fops);
+	}
+
+	if (lmp_sniff_capable(hdev)) {
+		debugfs_create_file("idle_timeout", 0644, hdev->debugfs,
+				    hdev, &idle_timeout_fops);
+		debugfs_create_file("sniff_min_interval", 0644, hdev->debugfs,
+				    hdev, &sniff_min_interval_fops);
+		debugfs_create_file("sniff_max_interval", 0644, hdev->debugfs,
+				    hdev, &sniff_max_interval_fops);
+	}
+}
+
+static int identity_show(struct seq_file *f, void *p)
+{
+	struct hci_dev *hdev = f->private;
+	bdaddr_t addr;
+	u8 addr_type;
+
+	hci_dev_lock(hdev);
+
+	hci_copy_identity_address(hdev, &addr, &addr_type);
+
+	seq_printf(f, "%pMR (type %u) %*phN %pMR\n", &addr, addr_type,
+		   16, hdev->irk, &hdev->rpa);
+
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(identity);
+
+static int rpa_timeout_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	/* Require the RPA timeout to be at least 30 seconds and at most
+	 * 24 hours.
+	 */
+	if (val < 30 || val > (60 * 60 * 24))
+		return -EINVAL;
+
+	hci_dev_lock(hdev);
+	hdev->rpa_timeout = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int rpa_timeout_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->rpa_timeout;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(rpa_timeout_fops, rpa_timeout_get,
+			rpa_timeout_set, "%llu\n");
+
+static int random_address_show(struct seq_file *f, void *p)
+{
+	struct hci_dev *hdev = f->private;
+
+	hci_dev_lock(hdev);
+	seq_printf(f, "%pMR\n", &hdev->random_addr);
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(random_address);
+
+static int static_address_show(struct seq_file *f, void *p)
+{
+	struct hci_dev *hdev = f->private;
+
+	hci_dev_lock(hdev);
+	seq_printf(f, "%pMR\n", &hdev->static_addr);
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(static_address);
+
+static ssize_t force_static_address_read(struct file *file,
+					 char __user *user_buf,
+					 size_t count, loff_t *ppos)
+{
+	struct hci_dev *hdev = file->private_data;
+	char buf[3];
+
+	buf[0] = hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ? 'Y': 'N';
+	buf[1] = '\n';
+	buf[2] = '\0';
+	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+}
+
+static ssize_t force_static_address_write(struct file *file,
+					  const char __user *user_buf,
+					  size_t count, loff_t *ppos)
+{
+	struct hci_dev *hdev = file->private_data;
+	bool enable;
+	int err;
+
+	if (test_bit(HCI_UP, &hdev->flags))
+		return -EBUSY;
+
+	err = kstrtobool_from_user(user_buf, count, &enable);
+	if (err)
+		return err;
+
+	if (enable == hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR))
+		return -EALREADY;
+
+	hci_dev_change_flag(hdev, HCI_FORCE_STATIC_ADDR);
+
+	return count;
+}
+
+static const struct file_operations force_static_address_fops = {
+	.open		= simple_open,
+	.read		= force_static_address_read,
+	.write		= force_static_address_write,
+	.llseek		= default_llseek,
+};
+
+static int white_list_show(struct seq_file *f, void *ptr)
+{
+	struct hci_dev *hdev = f->private;
+	struct bdaddr_list *b;
+
+	hci_dev_lock(hdev);
+	list_for_each_entry(b, &hdev->le_accept_list, list)
+		seq_printf(f, "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(white_list);
+
+static int resolv_list_show(struct seq_file *f, void *ptr)
+{
+	struct hci_dev *hdev = f->private;
+	struct bdaddr_list *b;
+
+	hci_dev_lock(hdev);
+	list_for_each_entry(b, &hdev->le_resolv_list, list)
+		seq_printf(f, "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(resolv_list);
+
+static int identity_resolving_keys_show(struct seq_file *f, void *ptr)
+{
+	struct hci_dev *hdev = f->private;
+	struct smp_irk *irk;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
+		seq_printf(f, "%pMR (type %u) %*phN %pMR\n",
+			   &irk->bdaddr, irk->addr_type,
+			   16, irk->val, &irk->rpa);
+	}
+	rcu_read_unlock();
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(identity_resolving_keys);
+
+static int long_term_keys_show(struct seq_file *f, void *ptr)
+{
+	struct hci_dev *hdev = f->private;
+	struct smp_ltk *ltk;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(ltk, &hdev->long_term_keys, list)
+		seq_printf(f, "%pMR (type %u) %u 0x%02x %u %.4x %.16llx %*phN\n",
+			   &ltk->bdaddr, ltk->bdaddr_type, ltk->authenticated,
+			   ltk->type, ltk->enc_size, __le16_to_cpu(ltk->ediv),
+			   __le64_to_cpu(ltk->rand), 16, ltk->val);
+	rcu_read_unlock();
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(long_term_keys);
+
+static int conn_min_interval_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	if (val < 0x0006 || val > 0x0c80 || val > hdev->le_conn_max_interval)
+		return -EINVAL;
+
+	hci_dev_lock(hdev);
+	hdev->le_conn_min_interval = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int conn_min_interval_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->le_conn_min_interval;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(conn_min_interval_fops, conn_min_interval_get,
+			conn_min_interval_set, "%llu\n");
+
+static int conn_max_interval_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	if (val < 0x0006 || val > 0x0c80 || val < hdev->le_conn_min_interval)
+		return -EINVAL;
+
+	hci_dev_lock(hdev);
+	hdev->le_conn_max_interval = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int conn_max_interval_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->le_conn_max_interval;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(conn_max_interval_fops, conn_max_interval_get,
+			conn_max_interval_set, "%llu\n");
+
+static int conn_latency_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	if (val > 0x01f3)
+		return -EINVAL;
+
+	hci_dev_lock(hdev);
+	hdev->le_conn_latency = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int conn_latency_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->le_conn_latency;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(conn_latency_fops, conn_latency_get,
+			conn_latency_set, "%llu\n");
+
+static int supervision_timeout_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	if (val < 0x000a || val > 0x0c80)
+		return -EINVAL;
+
+	hci_dev_lock(hdev);
+	hdev->le_supv_timeout = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int supervision_timeout_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->le_supv_timeout;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(supervision_timeout_fops, supervision_timeout_get,
+			supervision_timeout_set, "%llu\n");
+
+static int adv_channel_map_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	if (val < 0x01 || val > 0x07)
+		return -EINVAL;
+
+	hci_dev_lock(hdev);
+	hdev->le_adv_channel_map = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int adv_channel_map_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->le_adv_channel_map;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(adv_channel_map_fops, adv_channel_map_get,
+			adv_channel_map_set, "%llu\n");
+
+static int adv_min_interval_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	if (val < 0x0020 || val > 0x4000 || val > hdev->le_adv_max_interval)
+		return -EINVAL;
+
+	hci_dev_lock(hdev);
+	hdev->le_adv_min_interval = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int adv_min_interval_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->le_adv_min_interval;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(adv_min_interval_fops, adv_min_interval_get,
+			adv_min_interval_set, "%llu\n");
+
+static int adv_max_interval_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	if (val < 0x0020 || val > 0x4000 || val < hdev->le_adv_min_interval)
+		return -EINVAL;
+
+	hci_dev_lock(hdev);
+	hdev->le_adv_max_interval = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int adv_max_interval_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->le_adv_max_interval;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(adv_max_interval_fops, adv_max_interval_get,
+			adv_max_interval_set, "%llu\n");
+
+static int min_key_size_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	if (val > hdev->le_max_key_size || val < SMP_MIN_ENC_KEY_SIZE) {
+		hci_dev_unlock(hdev);
+		return -EINVAL;
+	}
+
+	hdev->le_min_key_size = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int min_key_size_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->le_min_key_size;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(min_key_size_fops, min_key_size_get,
+			min_key_size_set, "%llu\n");
+
+static int max_key_size_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	if (val > SMP_MAX_ENC_KEY_SIZE || val < hdev->le_min_key_size) {
+		hci_dev_unlock(hdev);
+		return -EINVAL;
+	}
+
+	hdev->le_max_key_size = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int max_key_size_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->le_max_key_size;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(max_key_size_fops, max_key_size_get,
+			max_key_size_set, "%llu\n");
+
+static int auth_payload_timeout_set(void *data, u64 val)
+{
+	struct hci_dev *hdev = data;
+
+	if (val < 0x0001 || val > 0xffff)
+		return -EINVAL;
+
+	hci_dev_lock(hdev);
+	hdev->auth_payload_timeout = val;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int auth_payload_timeout_get(void *data, u64 *val)
+{
+	struct hci_dev *hdev = data;
+
+	hci_dev_lock(hdev);
+	*val = hdev->auth_payload_timeout;
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(auth_payload_timeout_fops,
+			auth_payload_timeout_get,
+			auth_payload_timeout_set, "%llu\n");
+
+static ssize_t force_no_mitm_read(struct file *file,
+				  char __user *user_buf,
+				  size_t count, loff_t *ppos)
+{
+	struct hci_dev *hdev = file->private_data;
+	char buf[3];
+
+	buf[0] = hci_dev_test_flag(hdev, HCI_FORCE_NO_MITM) ? 'Y' : 'N';
+	buf[1] = '\n';
+	buf[2] = '\0';
+	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+}
+
+static ssize_t force_no_mitm_write(struct file *file,
+				   const char __user *user_buf,
+				   size_t count, loff_t *ppos)
+{
+	struct hci_dev *hdev = file->private_data;
+	char buf[32];
+	size_t buf_size = min(count, (sizeof(buf) - 1));
+	bool enable;
+
+	if (copy_from_user(buf, user_buf, buf_size))
+		return -EFAULT;
+
+	buf[buf_size] = '\0';
+	if (strtobool(buf, &enable))
+		return -EINVAL;
+
+	if (enable == hci_dev_test_flag(hdev, HCI_FORCE_NO_MITM))
+		return -EALREADY;
+
+	hci_dev_change_flag(hdev, HCI_FORCE_NO_MITM);
+
+	return count;
+}
+
+static const struct file_operations force_no_mitm_fops = {
+	.open		= simple_open,
+	.read		= force_no_mitm_read,
+	.write		= force_no_mitm_write,
+	.llseek		= default_llseek,
+};
+
+DEFINE_QUIRK_ATTRIBUTE(quirk_strict_duplicate_filter,
+		       HCI_QUIRK_STRICT_DUPLICATE_FILTER);
+DEFINE_QUIRK_ATTRIBUTE(quirk_simultaneous_discovery,
+		       HCI_QUIRK_SIMULTANEOUS_DISCOVERY);
+
+void hci_debugfs_create_le(struct hci_dev *hdev)
+{
+	debugfs_create_file("identity", 0400, hdev->debugfs, hdev,
+			    &identity_fops);
+	debugfs_create_file("rpa_timeout", 0644, hdev->debugfs, hdev,
+			    &rpa_timeout_fops);
+	debugfs_create_file("random_address", 0444, hdev->debugfs, hdev,
+			    &random_address_fops);
+	debugfs_create_file("static_address", 0444, hdev->debugfs, hdev,
+			    &static_address_fops);
+
+	/* For controllers with a public address, provide a debug
+	 * option to force the usage of the configured static
+	 * address. By default the public address is used.
+	 */
+	if (bacmp(&hdev->bdaddr, BDADDR_ANY))
+		debugfs_create_file("force_static_address", 0644,
+				    hdev->debugfs, hdev,
+				    &force_static_address_fops);
+
+	debugfs_create_u8("white_list_size", 0444, hdev->debugfs,
+			  &hdev->le_accept_list_size);
+	debugfs_create_file("white_list", 0444, hdev->debugfs, hdev,
+			    &white_list_fops);
+	debugfs_create_u8("resolv_list_size", 0444, hdev->debugfs,
+			  &hdev->le_resolv_list_size);
+	debugfs_create_file("resolv_list", 0444, hdev->debugfs, hdev,
+			    &resolv_list_fops);
+	debugfs_create_file("identity_resolving_keys", 0400, hdev->debugfs,
+			    hdev, &identity_resolving_keys_fops);
+	debugfs_create_file("long_term_keys", 0400, hdev->debugfs, hdev,
+			    &long_term_keys_fops);
+	debugfs_create_file("conn_min_interval", 0644, hdev->debugfs, hdev,
+			    &conn_min_interval_fops);
+	debugfs_create_file("conn_max_interval", 0644, hdev->debugfs, hdev,
+			    &conn_max_interval_fops);
+	debugfs_create_file("conn_latency", 0644, hdev->debugfs, hdev,
+			    &conn_latency_fops);
+	debugfs_create_file("supervision_timeout", 0644, hdev->debugfs, hdev,
+			    &supervision_timeout_fops);
+	debugfs_create_file("adv_channel_map", 0644, hdev->debugfs, hdev,
+			    &adv_channel_map_fops);
+	debugfs_create_file("adv_min_interval", 0644, hdev->debugfs, hdev,
+			    &adv_min_interval_fops);
+	debugfs_create_file("adv_max_interval", 0644, hdev->debugfs, hdev,
+			    &adv_max_interval_fops);
+	debugfs_create_u16("discov_interleaved_timeout", 0644, hdev->debugfs,
+			   &hdev->discov_interleaved_timeout);
+	debugfs_create_file("min_key_size", 0644, hdev->debugfs, hdev,
+			    &min_key_size_fops);
+	debugfs_create_file("max_key_size", 0644, hdev->debugfs, hdev,
+			    &max_key_size_fops);
+	debugfs_create_file("auth_payload_timeout", 0644, hdev->debugfs, hdev,
+			    &auth_payload_timeout_fops);
+	debugfs_create_file("force_no_mitm", 0644, hdev->debugfs, hdev,
+			    &force_no_mitm_fops);
+
+	debugfs_create_file("quirk_strict_duplicate_filter", 0644,
+			    hdev->debugfs, hdev,
+			    &quirk_strict_duplicate_filter_fops);
+	debugfs_create_file("quirk_simultaneous_discovery", 0644,
+			    hdev->debugfs, hdev,
+			    &quirk_simultaneous_discovery_fops);
+}
+
+void hci_debugfs_create_conn(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+	char name[6];
+
+	if (IS_ERR_OR_NULL(hdev->debugfs))
+		return;
+
+	snprintf(name, sizeof(name), "%u", conn->handle);
+	conn->debugfs = debugfs_create_dir(name, hdev->debugfs);
+}
diff --git a/net/bluetooth/hci_debugfs.h b/net/bluetooth/hci_debugfs.h
new file mode 100644
index 000000000..4444dc8ce
--- /dev/null
+++ b/net/bluetooth/hci_debugfs.h
@@ -0,0 +1,48 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2014 Intel Corporation
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#if IS_ENABLED(CONFIG_BT_DEBUGFS)
+
+void hci_debugfs_create_common(struct hci_dev *hdev);
+void hci_debugfs_create_bredr(struct hci_dev *hdev);
+void hci_debugfs_create_le(struct hci_dev *hdev);
+void hci_debugfs_create_conn(struct hci_conn *conn);
+
+#else
+
+static inline void hci_debugfs_create_common(struct hci_dev *hdev)
+{
+}
+
+static inline void hci_debugfs_create_bredr(struct hci_dev *hdev)
+{
+}
+
+static inline void hci_debugfs_create_le(struct hci_dev *hdev)
+{
+}
+
+static inline void hci_debugfs_create_conn(struct hci_conn *conn)
+{
+}
+
+#endif
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
new file mode 100644
index 000000000..4027c7978
--- /dev/null
+++ b/net/bluetooth/hci_event.c
@@ -0,0 +1,6420 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
+
+   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth HCI event handling. */
+
+#include <asm/unaligned.h>
+#include <linux/crypto.h>
+#include <crypto/algapi.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/mgmt.h>
+
+#include "hci_request.h"
+#include "hci_debugfs.h"
+#include "a2mp.h"
+#include "amp.h"
+#include "smp.h"
+#include "msft.h"
+
+#define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \
+		 "\x00\x00\x00\x00\x00\x00\x00\x00"
+
+/* Handle HCI Event packets */
+
+static void hci_cc_inquiry_cancel(struct hci_dev *hdev, struct sk_buff *skb,
+				  u8 *new_status)
+{
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	/* It is possible that we receive Inquiry Complete event right
+	 * before we receive Inquiry Cancel Command Complete event, in
+	 * which case the latter event should have status of Command
+	 * Disallowed (0x0c). This should not be treated as error, since
+	 * we actually achieve what Inquiry Cancel wants to achieve,
+	 * which is to end the last Inquiry session.
+	 */
+	if (status == 0x0c && !test_bit(HCI_INQUIRY, &hdev->flags)) {
+		bt_dev_warn(hdev, "Ignoring error of Inquiry Cancel command");
+		status = 0x00;
+	}
+
+	*new_status = status;
+
+	if (status)
+		return;
+
+	clear_bit(HCI_INQUIRY, &hdev->flags);
+	smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
+	wake_up_bit(&hdev->flags, HCI_INQUIRY);
+
+	hci_dev_lock(hdev);
+	/* Set discovery state to stopped if we're not doing LE active
+	 * scanning.
+	 */
+	if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
+	    hdev->le_scan_type != LE_SCAN_ACTIVE)
+		hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+	hci_dev_unlock(hdev);
+
+	hci_conn_check_pending(hdev);
+}
+
+static void hci_cc_periodic_inq(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	hci_dev_set_flag(hdev, HCI_PERIODIC_INQ);
+}
+
+static void hci_cc_exit_periodic_inq(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);
+
+	hci_conn_check_pending(hdev);
+}
+
+static void hci_cc_remote_name_req_cancel(struct hci_dev *hdev,
+					  struct sk_buff *skb)
+{
+	BT_DBG("%s", hdev->name);
+}
+
+static void hci_cc_role_discovery(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_role_discovery *rp = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
+	if (conn)
+		conn->role = rp->role;
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_read_link_policy(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_read_link_policy *rp = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
+	if (conn)
+		conn->link_policy = __le16_to_cpu(rp->policy);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_write_link_policy(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_write_link_policy *rp = (void *) skb->data;
+	struct hci_conn *conn;
+	void *sent;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LINK_POLICY);
+	if (!sent)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
+	if (conn)
+		conn->link_policy = get_unaligned_le16(sent + 2);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_read_def_link_policy(struct hci_dev *hdev,
+					struct sk_buff *skb)
+{
+	struct hci_rp_read_def_link_policy *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hdev->link_policy = __le16_to_cpu(rp->policy);
+}
+
+static void hci_cc_write_def_link_policy(struct hci_dev *hdev,
+					 struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+	void *sent;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_LINK_POLICY);
+	if (!sent)
+		return;
+
+	hdev->link_policy = get_unaligned_le16(sent);
+}
+
+static void hci_cc_reset(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	clear_bit(HCI_RESET, &hdev->flags);
+
+	if (status)
+		return;
+
+	/* Reset all non-persistent flags */
+	hci_dev_clear_volatile_flags(hdev);
+
+	hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+
+	hdev->inq_tx_power = HCI_TX_POWER_INVALID;
+	hdev->adv_tx_power = HCI_TX_POWER_INVALID;
+
+	memset(hdev->adv_data, 0, sizeof(hdev->adv_data));
+	hdev->adv_data_len = 0;
+
+	memset(hdev->scan_rsp_data, 0, sizeof(hdev->scan_rsp_data));
+	hdev->scan_rsp_data_len = 0;
+
+	hdev->le_scan_type = LE_SCAN_PASSIVE;
+
+	hdev->ssp_debug_mode = 0;
+
+	hci_bdaddr_list_clear(&hdev->le_accept_list);
+	hci_bdaddr_list_clear(&hdev->le_resolv_list);
+}
+
+static void hci_cc_read_stored_link_key(struct hci_dev *hdev,
+					struct sk_buff *skb)
+{
+	struct hci_rp_read_stored_link_key *rp = (void *)skb->data;
+	struct hci_cp_read_stored_link_key *sent;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_READ_STORED_LINK_KEY);
+	if (!sent)
+		return;
+
+	if (!rp->status && sent->read_all == 0x01) {
+		hdev->stored_max_keys = rp->max_keys;
+		hdev->stored_num_keys = rp->num_keys;
+	}
+}
+
+static void hci_cc_delete_stored_link_key(struct hci_dev *hdev,
+					  struct sk_buff *skb)
+{
+	struct hci_rp_delete_stored_link_key *rp = (void *)skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	if (rp->num_keys <= hdev->stored_num_keys)
+		hdev->stored_num_keys -= rp->num_keys;
+	else
+		hdev->stored_num_keys = 0;
+}
+
+static void hci_cc_write_local_name(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+	void *sent;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LOCAL_NAME);
+	if (!sent)
+		return;
+
+	hci_dev_lock(hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_MGMT))
+		mgmt_set_local_name_complete(hdev, sent, status);
+	else if (!status)
+		memcpy(hdev->dev_name, sent, HCI_MAX_NAME_LENGTH);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_read_local_name(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_read_local_name *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	if (hci_dev_test_flag(hdev, HCI_SETUP) ||
+	    hci_dev_test_flag(hdev, HCI_CONFIG))
+		memcpy(hdev->dev_name, rp->name, HCI_MAX_NAME_LENGTH);
+}
+
+static void hci_cc_write_auth_enable(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+	void *sent;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_ENABLE);
+	if (!sent)
+		return;
+
+	hci_dev_lock(hdev);
+
+	if (!status) {
+		__u8 param = *((__u8 *) sent);
+
+		if (param == AUTH_ENABLED)
+			set_bit(HCI_AUTH, &hdev->flags);
+		else
+			clear_bit(HCI_AUTH, &hdev->flags);
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_MGMT))
+		mgmt_auth_enable_complete(hdev, status);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_write_encrypt_mode(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+	__u8 param;
+	void *sent;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_ENCRYPT_MODE);
+	if (!sent)
+		return;
+
+	param = *((__u8 *) sent);
+
+	if (param)
+		set_bit(HCI_ENCRYPT, &hdev->flags);
+	else
+		clear_bit(HCI_ENCRYPT, &hdev->flags);
+}
+
+static void hci_cc_write_scan_enable(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+	__u8 param;
+	void *sent;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SCAN_ENABLE);
+	if (!sent)
+		return;
+
+	param = *((__u8 *) sent);
+
+	hci_dev_lock(hdev);
+
+	if (status) {
+		hdev->discov_timeout = 0;
+		goto done;
+	}
+
+	if (param & SCAN_INQUIRY)
+		set_bit(HCI_ISCAN, &hdev->flags);
+	else
+		clear_bit(HCI_ISCAN, &hdev->flags);
+
+	if (param & SCAN_PAGE)
+		set_bit(HCI_PSCAN, &hdev->flags);
+	else
+		clear_bit(HCI_PSCAN, &hdev->flags);
+
+done:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_read_class_of_dev(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_read_class_of_dev *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	memcpy(hdev->dev_class, rp->dev_class, 3);
+
+	BT_DBG("%s class 0x%.2x%.2x%.2x", hdev->name,
+	       hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
+}
+
+static void hci_cc_write_class_of_dev(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+	void *sent;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_CLASS_OF_DEV);
+	if (!sent)
+		return;
+
+	hci_dev_lock(hdev);
+
+	if (status == 0)
+		memcpy(hdev->dev_class, sent, 3);
+
+	if (hci_dev_test_flag(hdev, HCI_MGMT))
+		mgmt_set_class_of_dev_complete(hdev, sent, status);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_read_voice_setting(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_read_voice_setting *rp = (void *) skb->data;
+	__u16 setting;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	setting = __le16_to_cpu(rp->voice_setting);
+
+	if (hdev->voice_setting == setting)
+		return;
+
+	hdev->voice_setting = setting;
+
+	BT_DBG("%s voice setting 0x%4.4x", hdev->name, setting);
+
+	if (hdev->notify)
+		hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
+}
+
+static void hci_cc_write_voice_setting(struct hci_dev *hdev,
+				       struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+	__u16 setting;
+	void *sent;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_VOICE_SETTING);
+	if (!sent)
+		return;
+
+	setting = get_unaligned_le16(sent);
+
+	if (hdev->voice_setting == setting)
+		return;
+
+	hdev->voice_setting = setting;
+
+	BT_DBG("%s voice setting 0x%4.4x", hdev->name, setting);
+
+	if (hdev->notify)
+		hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
+}
+
+static void hci_cc_read_num_supported_iac(struct hci_dev *hdev,
+					  struct sk_buff *skb)
+{
+	struct hci_rp_read_num_supported_iac *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hdev->num_iac = rp->num_iac;
+
+	BT_DBG("%s num iac %d", hdev->name, hdev->num_iac);
+}
+
+static void hci_cc_write_ssp_mode(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+	struct hci_cp_write_ssp_mode *sent;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_MODE);
+	if (!sent)
+		return;
+
+	hci_dev_lock(hdev);
+
+	if (!status) {
+		if (sent->mode)
+			hdev->features[1][0] |= LMP_HOST_SSP;
+		else
+			hdev->features[1][0] &= ~LMP_HOST_SSP;
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_MGMT))
+		mgmt_ssp_enable_complete(hdev, sent->mode, status);
+	else if (!status) {
+		if (sent->mode)
+			hci_dev_set_flag(hdev, HCI_SSP_ENABLED);
+		else
+			hci_dev_clear_flag(hdev, HCI_SSP_ENABLED);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_write_sc_support(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	u8 status = *((u8 *) skb->data);
+	struct hci_cp_write_sc_support *sent;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SC_SUPPORT);
+	if (!sent)
+		return;
+
+	hci_dev_lock(hdev);
+
+	if (!status) {
+		if (sent->support)
+			hdev->features[1][0] |= LMP_HOST_SC;
+		else
+			hdev->features[1][0] &= ~LMP_HOST_SC;
+	}
+
+	if (!hci_dev_test_flag(hdev, HCI_MGMT) && !status) {
+		if (sent->support)
+			hci_dev_set_flag(hdev, HCI_SC_ENABLED);
+		else
+			hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_read_local_version(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_read_local_version *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	if (hci_dev_test_flag(hdev, HCI_SETUP) ||
+	    hci_dev_test_flag(hdev, HCI_CONFIG)) {
+		hdev->hci_ver = rp->hci_ver;
+		hdev->hci_rev = __le16_to_cpu(rp->hci_rev);
+		hdev->lmp_ver = rp->lmp_ver;
+		hdev->manufacturer = __le16_to_cpu(rp->manufacturer);
+		hdev->lmp_subver = __le16_to_cpu(rp->lmp_subver);
+	}
+}
+
+static void hci_cc_read_local_commands(struct hci_dev *hdev,
+				       struct sk_buff *skb)
+{
+	struct hci_rp_read_local_commands *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	if (hci_dev_test_flag(hdev, HCI_SETUP) ||
+	    hci_dev_test_flag(hdev, HCI_CONFIG))
+		memcpy(hdev->commands, rp->commands, sizeof(hdev->commands));
+}
+
+static void hci_cc_read_auth_payload_timeout(struct hci_dev *hdev,
+					     struct sk_buff *skb)
+{
+	struct hci_rp_read_auth_payload_to *rp = (void *)skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
+	if (conn)
+		conn->auth_payload_timeout = __le16_to_cpu(rp->timeout);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_write_auth_payload_timeout(struct hci_dev *hdev,
+					      struct sk_buff *skb)
+{
+	struct hci_rp_write_auth_payload_to *rp = (void *)skb->data;
+	struct hci_conn *conn;
+	void *sent;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO);
+	if (!sent)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
+	if (conn)
+		conn->auth_payload_timeout = get_unaligned_le16(sent + 2);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_read_local_features(struct hci_dev *hdev,
+				       struct sk_buff *skb)
+{
+	struct hci_rp_read_local_features *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	memcpy(hdev->features, rp->features, 8);
+
+	/* Adjust default settings according to features
+	 * supported by device. */
+
+	if (hdev->features[0][0] & LMP_3SLOT)
+		hdev->pkt_type |= (HCI_DM3 | HCI_DH3);
+
+	if (hdev->features[0][0] & LMP_5SLOT)
+		hdev->pkt_type |= (HCI_DM5 | HCI_DH5);
+
+	if (hdev->features[0][1] & LMP_HV2) {
+		hdev->pkt_type  |= (HCI_HV2);
+		hdev->esco_type |= (ESCO_HV2);
+	}
+
+	if (hdev->features[0][1] & LMP_HV3) {
+		hdev->pkt_type  |= (HCI_HV3);
+		hdev->esco_type |= (ESCO_HV3);
+	}
+
+	if (lmp_esco_capable(hdev))
+		hdev->esco_type |= (ESCO_EV3);
+
+	if (hdev->features[0][4] & LMP_EV4)
+		hdev->esco_type |= (ESCO_EV4);
+
+	if (hdev->features[0][4] & LMP_EV5)
+		hdev->esco_type |= (ESCO_EV5);
+
+	if (hdev->features[0][5] & LMP_EDR_ESCO_2M)
+		hdev->esco_type |= (ESCO_2EV3);
+
+	if (hdev->features[0][5] & LMP_EDR_ESCO_3M)
+		hdev->esco_type |= (ESCO_3EV3);
+
+	if (hdev->features[0][5] & LMP_EDR_3S_ESCO)
+		hdev->esco_type |= (ESCO_2EV5 | ESCO_3EV5);
+}
+
+static void hci_cc_read_local_ext_features(struct hci_dev *hdev,
+					   struct sk_buff *skb)
+{
+	struct hci_rp_read_local_ext_features *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	if (hdev->max_page < rp->max_page)
+		hdev->max_page = rp->max_page;
+
+	if (rp->page < HCI_MAX_PAGES)
+		memcpy(hdev->features[rp->page], rp->features, 8);
+}
+
+static void hci_cc_read_flow_control_mode(struct hci_dev *hdev,
+					  struct sk_buff *skb)
+{
+	struct hci_rp_read_flow_control_mode *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hdev->flow_ctl_mode = rp->mode;
+}
+
+static void hci_cc_read_buffer_size(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_read_buffer_size *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hdev->acl_mtu  = __le16_to_cpu(rp->acl_mtu);
+	hdev->sco_mtu  = rp->sco_mtu;
+	hdev->acl_pkts = __le16_to_cpu(rp->acl_max_pkt);
+	hdev->sco_pkts = __le16_to_cpu(rp->sco_max_pkt);
+
+	if (test_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks)) {
+		hdev->sco_mtu  = 64;
+		hdev->sco_pkts = 8;
+	}
+
+	hdev->acl_cnt = hdev->acl_pkts;
+	hdev->sco_cnt = hdev->sco_pkts;
+
+	BT_DBG("%s acl mtu %d:%d sco mtu %d:%d", hdev->name, hdev->acl_mtu,
+	       hdev->acl_pkts, hdev->sco_mtu, hdev->sco_pkts);
+}
+
+static void hci_cc_read_bd_addr(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_read_bd_addr *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	if (test_bit(HCI_INIT, &hdev->flags))
+		bacpy(&hdev->bdaddr, &rp->bdaddr);
+
+	if (hci_dev_test_flag(hdev, HCI_SETUP))
+		bacpy(&hdev->setup_addr, &rp->bdaddr);
+}
+
+static void hci_cc_read_local_pairing_opts(struct hci_dev *hdev,
+					   struct sk_buff *skb)
+{
+	struct hci_rp_read_local_pairing_opts *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	if (hci_dev_test_flag(hdev, HCI_SETUP) ||
+	    hci_dev_test_flag(hdev, HCI_CONFIG)) {
+		hdev->pairing_opts = rp->pairing_opts;
+		hdev->max_enc_key_size = rp->max_key_size;
+	}
+}
+
+static void hci_cc_read_page_scan_activity(struct hci_dev *hdev,
+					   struct sk_buff *skb)
+{
+	struct hci_rp_read_page_scan_activity *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	if (test_bit(HCI_INIT, &hdev->flags)) {
+		hdev->page_scan_interval = __le16_to_cpu(rp->interval);
+		hdev->page_scan_window = __le16_to_cpu(rp->window);
+	}
+}
+
+static void hci_cc_write_page_scan_activity(struct hci_dev *hdev,
+					    struct sk_buff *skb)
+{
+	u8 status = *((u8 *) skb->data);
+	struct hci_cp_write_page_scan_activity *sent;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_ACTIVITY);
+	if (!sent)
+		return;
+
+	hdev->page_scan_interval = __le16_to_cpu(sent->interval);
+	hdev->page_scan_window = __le16_to_cpu(sent->window);
+}
+
+static void hci_cc_read_page_scan_type(struct hci_dev *hdev,
+					   struct sk_buff *skb)
+{
+	struct hci_rp_read_page_scan_type *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	if (test_bit(HCI_INIT, &hdev->flags))
+		hdev->page_scan_type = rp->type;
+}
+
+static void hci_cc_write_page_scan_type(struct hci_dev *hdev,
+					struct sk_buff *skb)
+{
+	u8 status = *((u8 *) skb->data);
+	u8 *type;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	type = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_TYPE);
+	if (type)
+		hdev->page_scan_type = *type;
+}
+
+static void hci_cc_read_data_block_size(struct hci_dev *hdev,
+					struct sk_buff *skb)
+{
+	struct hci_rp_read_data_block_size *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hdev->block_mtu = __le16_to_cpu(rp->max_acl_len);
+	hdev->block_len = __le16_to_cpu(rp->block_len);
+	hdev->num_blocks = __le16_to_cpu(rp->num_blocks);
+
+	hdev->block_cnt = hdev->num_blocks;
+
+	BT_DBG("%s blk mtu %d cnt %d len %d", hdev->name, hdev->block_mtu,
+	       hdev->block_cnt, hdev->block_len);
+}
+
+static void hci_cc_read_clock(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_read_clock *rp = (void *) skb->data;
+	struct hci_cp_read_clock *cp;
+	struct hci_conn *conn;
+
+	BT_DBG("%s", hdev->name);
+
+	if (skb->len < sizeof(*rp))
+		return;
+
+	if (rp->status)
+		return;
+
+	hci_dev_lock(hdev);
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK);
+	if (!cp)
+		goto unlock;
+
+	if (cp->which == 0x00) {
+		hdev->clock = le32_to_cpu(rp->clock);
+		goto unlock;
+	}
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
+	if (conn) {
+		conn->clock = le32_to_cpu(rp->clock);
+		conn->clock_accuracy = le16_to_cpu(rp->accuracy);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_read_local_amp_info(struct hci_dev *hdev,
+				       struct sk_buff *skb)
+{
+	struct hci_rp_read_local_amp_info *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hdev->amp_status = rp->amp_status;
+	hdev->amp_total_bw = __le32_to_cpu(rp->total_bw);
+	hdev->amp_max_bw = __le32_to_cpu(rp->max_bw);
+	hdev->amp_min_latency = __le32_to_cpu(rp->min_latency);
+	hdev->amp_max_pdu = __le32_to_cpu(rp->max_pdu);
+	hdev->amp_type = rp->amp_type;
+	hdev->amp_pal_cap = __le16_to_cpu(rp->pal_cap);
+	hdev->amp_assoc_size = __le16_to_cpu(rp->max_assoc_size);
+	hdev->amp_be_flush_to = __le32_to_cpu(rp->be_flush_to);
+	hdev->amp_max_flush_to = __le32_to_cpu(rp->max_flush_to);
+}
+
+static void hci_cc_read_inq_rsp_tx_power(struct hci_dev *hdev,
+					 struct sk_buff *skb)
+{
+	struct hci_rp_read_inq_rsp_tx_power *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hdev->inq_tx_power = rp->tx_power;
+}
+
+static void hci_cc_read_def_err_data_reporting(struct hci_dev *hdev,
+					       struct sk_buff *skb)
+{
+	struct hci_rp_read_def_err_data_reporting *rp = (void *)skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hdev->err_data_reporting = rp->err_data_reporting;
+}
+
+static void hci_cc_write_def_err_data_reporting(struct hci_dev *hdev,
+						struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *)skb->data);
+	struct hci_cp_write_def_err_data_reporting *cp;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING);
+	if (!cp)
+		return;
+
+	hdev->err_data_reporting = cp->err_data_reporting;
+}
+
+static void hci_cc_pin_code_reply(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_pin_code_reply *rp = (void *) skb->data;
+	struct hci_cp_pin_code_reply *cp;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	hci_dev_lock(hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_MGMT))
+		mgmt_pin_code_reply_complete(hdev, &rp->bdaddr, rp->status);
+
+	if (rp->status)
+		goto unlock;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_PIN_CODE_REPLY);
+	if (!cp)
+		goto unlock;
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
+	if (conn)
+		conn->pin_length = cp->pin_len;
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_pin_code_neg_reply(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_pin_code_neg_reply *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	hci_dev_lock(hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_MGMT))
+		mgmt_pin_code_neg_reply_complete(hdev, &rp->bdaddr,
+						 rp->status);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_le_read_buffer_size(struct hci_dev *hdev,
+				       struct sk_buff *skb)
+{
+	struct hci_rp_le_read_buffer_size *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hdev->le_mtu = __le16_to_cpu(rp->le_mtu);
+	hdev->le_pkts = rp->le_max_pkt;
+
+	hdev->le_cnt = hdev->le_pkts;
+
+	BT_DBG("%s le mtu %d:%d", hdev->name, hdev->le_mtu, hdev->le_pkts);
+}
+
+static void hci_cc_le_read_local_features(struct hci_dev *hdev,
+					  struct sk_buff *skb)
+{
+	struct hci_rp_le_read_local_features *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	memcpy(hdev->le_features, rp->features, 8);
+}
+
+static void hci_cc_le_read_adv_tx_power(struct hci_dev *hdev,
+					struct sk_buff *skb)
+{
+	struct hci_rp_le_read_adv_tx_power *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hdev->adv_tx_power = rp->tx_power;
+}
+
+static void hci_cc_user_confirm_reply(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_user_confirm_reply *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	hci_dev_lock(hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_MGMT))
+		mgmt_user_confirm_reply_complete(hdev, &rp->bdaddr, ACL_LINK, 0,
+						 rp->status);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_user_confirm_neg_reply(struct hci_dev *hdev,
+					  struct sk_buff *skb)
+{
+	struct hci_rp_user_confirm_reply *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	hci_dev_lock(hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_MGMT))
+		mgmt_user_confirm_neg_reply_complete(hdev, &rp->bdaddr,
+						     ACL_LINK, 0, rp->status);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_user_passkey_reply(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_user_confirm_reply *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	hci_dev_lock(hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_MGMT))
+		mgmt_user_passkey_reply_complete(hdev, &rp->bdaddr, ACL_LINK,
+						 0, rp->status);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_user_passkey_neg_reply(struct hci_dev *hdev,
+					  struct sk_buff *skb)
+{
+	struct hci_rp_user_confirm_reply *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	hci_dev_lock(hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_MGMT))
+		mgmt_user_passkey_neg_reply_complete(hdev, &rp->bdaddr,
+						     ACL_LINK, 0, rp->status);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_read_local_oob_data(struct hci_dev *hdev,
+				       struct sk_buff *skb)
+{
+	struct hci_rp_read_local_oob_data *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+}
+
+static void hci_cc_read_local_oob_ext_data(struct hci_dev *hdev,
+					   struct sk_buff *skb)
+{
+	struct hci_rp_read_local_oob_ext_data *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+}
+
+static void hci_cc_le_set_random_addr(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+	bdaddr_t *sent;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_RANDOM_ADDR);
+	if (!sent)
+		return;
+
+	hci_dev_lock(hdev);
+
+	bacpy(&hdev->random_addr, sent);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_le_set_default_phy(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+	struct hci_cp_le_set_default_phy *cp;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_DEFAULT_PHY);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	hdev->le_tx_def_phys = cp->tx_phys;
+	hdev->le_rx_def_phys = cp->rx_phys;
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev,
+                                              struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+	struct hci_cp_le_set_adv_set_rand_addr *cp;
+	struct adv_info *adv_instance;
+
+	if (status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	if (!hdev->cur_adv_instance) {
+		/* Store in hdev for instance 0 (Set adv and Directed advs) */
+		bacpy(&hdev->random_addr, &cp->bdaddr);
+	} else {
+		adv_instance = hci_find_adv_instance(hdev,
+						     hdev->cur_adv_instance);
+		if (adv_instance)
+			bacpy(&adv_instance->random_addr, &cp->bdaddr);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_le_set_adv_enable(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	__u8 *sent, status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_ENABLE);
+	if (!sent)
+		return;
+
+	hci_dev_lock(hdev);
+
+	/* If we're doing connection initiation as peripheral. Set a
+	 * timeout in case something goes wrong.
+	 */
+	if (*sent) {
+		struct hci_conn *conn;
+
+		hci_dev_set_flag(hdev, HCI_LE_ADV);
+
+		conn = hci_lookup_le_connect(hdev);
+		if (conn)
+			queue_delayed_work(hdev->workqueue,
+					   &conn->le_conn_timeout,
+					   conn->conn_timeout);
+	} else {
+		hci_dev_clear_flag(hdev, HCI_LE_ADV);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_le_set_ext_adv_enable(struct hci_dev *hdev,
+					 struct sk_buff *skb)
+{
+	struct hci_cp_le_set_ext_adv_enable *cp;
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	if (cp->enable) {
+		struct hci_conn *conn;
+
+		hci_dev_set_flag(hdev, HCI_LE_ADV);
+
+		conn = hci_lookup_le_connect(hdev);
+		if (conn)
+			queue_delayed_work(hdev->workqueue,
+					   &conn->le_conn_timeout,
+					   conn->conn_timeout);
+	} else {
+		hci_dev_clear_flag(hdev, HCI_LE_ADV);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_le_set_scan_param(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_cp_le_set_scan_param *cp;
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_PARAM);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	hdev->le_scan_type = cp->type;
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_le_set_ext_scan_param(struct hci_dev *hdev,
+					 struct sk_buff *skb)
+{
+	struct hci_cp_le_set_ext_scan_params *cp;
+	__u8 status = *((__u8 *) skb->data);
+	struct hci_cp_le_scan_phy_params *phy_param;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS);
+	if (!cp)
+		return;
+
+	phy_param = (void *)cp->data;
+
+	hci_dev_lock(hdev);
+
+	hdev->le_scan_type = phy_param->type;
+
+	hci_dev_unlock(hdev);
+}
+
+static bool has_pending_adv_report(struct hci_dev *hdev)
+{
+	struct discovery_state *d = &hdev->discovery;
+
+	return bacmp(&d->last_adv_addr, BDADDR_ANY);
+}
+
+static void clear_pending_adv_report(struct hci_dev *hdev)
+{
+	struct discovery_state *d = &hdev->discovery;
+
+	bacpy(&d->last_adv_addr, BDADDR_ANY);
+	d->last_adv_data_len = 0;
+}
+
+static void store_pending_adv_report(struct hci_dev *hdev, bdaddr_t *bdaddr,
+				     u8 bdaddr_type, s8 rssi, u32 flags,
+				     u8 *data, u8 len)
+{
+	struct discovery_state *d = &hdev->discovery;
+
+	if (len > HCI_MAX_AD_LENGTH)
+		return;
+
+	bacpy(&d->last_adv_addr, bdaddr);
+	d->last_adv_addr_type = bdaddr_type;
+	d->last_adv_rssi = rssi;
+	d->last_adv_flags = flags;
+	memcpy(d->last_adv_data, data, len);
+	d->last_adv_data_len = len;
+}
+
+static void le_set_scan_enable_complete(struct hci_dev *hdev, u8 enable)
+{
+	hci_dev_lock(hdev);
+
+	switch (enable) {
+	case LE_SCAN_ENABLE:
+		hci_dev_set_flag(hdev, HCI_LE_SCAN);
+		if (hdev->le_scan_type == LE_SCAN_ACTIVE)
+			clear_pending_adv_report(hdev);
+		break;
+
+	case LE_SCAN_DISABLE:
+		/* We do this here instead of when setting DISCOVERY_STOPPED
+		 * since the latter would potentially require waiting for
+		 * inquiry to stop too.
+		 */
+		if (has_pending_adv_report(hdev)) {
+			struct discovery_state *d = &hdev->discovery;
+
+			mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
+					  d->last_adv_addr_type, NULL,
+					  d->last_adv_rssi, d->last_adv_flags,
+					  d->last_adv_data,
+					  d->last_adv_data_len, NULL, 0);
+		}
+
+		/* Cancel this timer so that we don't try to disable scanning
+		 * when it's already disabled.
+		 */
+		cancel_delayed_work(&hdev->le_scan_disable);
+
+		hci_dev_clear_flag(hdev, HCI_LE_SCAN);
+
+		/* The HCI_LE_SCAN_INTERRUPTED flag indicates that we
+		 * interrupted scanning due to a connect request. Mark
+		 * therefore discovery as stopped. If this was not
+		 * because of a connect request advertising might have
+		 * been disabled because of active scanning, so
+		 * re-enable it again if necessary.
+		 */
+		if (hci_dev_test_and_clear_flag(hdev, HCI_LE_SCAN_INTERRUPTED))
+			hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+		else if (!hci_dev_test_flag(hdev, HCI_LE_ADV) &&
+			 hdev->discovery.state == DISCOVERY_FINDING)
+			hci_req_reenable_advertising(hdev);
+
+		break;
+
+	default:
+		bt_dev_err(hdev, "use of reserved LE_Scan_Enable param %d",
+			   enable);
+		break;
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_le_set_scan_enable(struct hci_dev *hdev,
+				      struct sk_buff *skb)
+{
+	struct hci_cp_le_set_scan_enable *cp;
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_ENABLE);
+	if (!cp)
+		return;
+
+	le_set_scan_enable_complete(hdev, cp->enable);
+}
+
+static void hci_cc_le_set_ext_scan_enable(struct hci_dev *hdev,
+				      struct sk_buff *skb)
+{
+	struct hci_cp_le_set_ext_scan_enable *cp;
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE);
+	if (!cp)
+		return;
+
+	le_set_scan_enable_complete(hdev, cp->enable);
+}
+
+static void hci_cc_le_read_num_adv_sets(struct hci_dev *hdev,
+				      struct sk_buff *skb)
+{
+	struct hci_rp_le_read_num_supported_adv_sets *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x No of Adv sets %u", hdev->name, rp->status,
+	       rp->num_of_sets);
+
+	if (rp->status)
+		return;
+
+	hdev->le_num_of_adv_sets = rp->num_of_sets;
+}
+
+static void hci_cc_le_read_accept_list_size(struct hci_dev *hdev,
+					    struct sk_buff *skb)
+{
+	struct hci_rp_le_read_accept_list_size *rp = (void *)skb->data;
+
+	BT_DBG("%s status 0x%2.2x size %u", hdev->name, rp->status, rp->size);
+
+	if (rp->status)
+		return;
+
+	hdev->le_accept_list_size = rp->size;
+}
+
+static void hci_cc_le_clear_accept_list(struct hci_dev *hdev,
+					struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	hci_bdaddr_list_clear(&hdev->le_accept_list);
+}
+
+static void hci_cc_le_add_to_accept_list(struct hci_dev *hdev,
+					 struct sk_buff *skb)
+{
+	struct hci_cp_le_add_to_accept_list *sent;
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST);
+	if (!sent)
+		return;
+
+	hci_bdaddr_list_add(&hdev->le_accept_list, &sent->bdaddr,
+			    sent->bdaddr_type);
+}
+
+static void hci_cc_le_del_from_accept_list(struct hci_dev *hdev,
+					   struct sk_buff *skb)
+{
+	struct hci_cp_le_del_from_accept_list *sent;
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST);
+	if (!sent)
+		return;
+
+	hci_bdaddr_list_del(&hdev->le_accept_list, &sent->bdaddr,
+			    sent->bdaddr_type);
+}
+
+static void hci_cc_le_read_supported_states(struct hci_dev *hdev,
+					    struct sk_buff *skb)
+{
+	struct hci_rp_le_read_supported_states *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	memcpy(hdev->le_states, rp->le_states, 8);
+}
+
+static void hci_cc_le_read_def_data_len(struct hci_dev *hdev,
+					struct sk_buff *skb)
+{
+	struct hci_rp_le_read_def_data_len *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hdev->le_def_tx_len = le16_to_cpu(rp->tx_len);
+	hdev->le_def_tx_time = le16_to_cpu(rp->tx_time);
+}
+
+static void hci_cc_le_write_def_data_len(struct hci_dev *hdev,
+					 struct sk_buff *skb)
+{
+	struct hci_cp_le_write_def_data_len *sent;
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN);
+	if (!sent)
+		return;
+
+	hdev->le_def_tx_len = le16_to_cpu(sent->tx_len);
+	hdev->le_def_tx_time = le16_to_cpu(sent->tx_time);
+}
+
+static void hci_cc_le_add_to_resolv_list(struct hci_dev *hdev,
+					 struct sk_buff *skb)
+{
+	struct hci_cp_le_add_to_resolv_list *sent;
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST);
+	if (!sent)
+		return;
+
+	hci_bdaddr_list_add_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
+				sent->bdaddr_type, sent->peer_irk,
+				sent->local_irk);
+}
+
+static void hci_cc_le_del_from_resolv_list(struct hci_dev *hdev,
+					  struct sk_buff *skb)
+{
+	struct hci_cp_le_del_from_resolv_list *sent;
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST);
+	if (!sent)
+		return;
+
+	hci_bdaddr_list_del_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
+			    sent->bdaddr_type);
+}
+
+static void hci_cc_le_clear_resolv_list(struct hci_dev *hdev,
+				       struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	hci_bdaddr_list_clear(&hdev->le_resolv_list);
+}
+
+static void hci_cc_le_read_resolv_list_size(struct hci_dev *hdev,
+					   struct sk_buff *skb)
+{
+	struct hci_rp_le_read_resolv_list_size *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x size %u", hdev->name, rp->status, rp->size);
+
+	if (rp->status)
+		return;
+
+	hdev->le_resolv_list_size = rp->size;
+}
+
+static void hci_cc_le_set_addr_resolution_enable(struct hci_dev *hdev,
+						struct sk_buff *skb)
+{
+	__u8 *sent, status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE);
+	if (!sent)
+		return;
+
+	hci_dev_lock(hdev);
+
+	if (*sent)
+		hci_dev_set_flag(hdev, HCI_LL_RPA_RESOLUTION);
+	else
+		hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_le_read_max_data_len(struct hci_dev *hdev,
+					struct sk_buff *skb)
+{
+	struct hci_rp_le_read_max_data_len *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hdev->le_max_tx_len = le16_to_cpu(rp->tx_len);
+	hdev->le_max_tx_time = le16_to_cpu(rp->tx_time);
+	hdev->le_max_rx_len = le16_to_cpu(rp->rx_len);
+	hdev->le_max_rx_time = le16_to_cpu(rp->rx_time);
+}
+
+static void hci_cc_write_le_host_supported(struct hci_dev *hdev,
+					   struct sk_buff *skb)
+{
+	struct hci_cp_write_le_host_supported *sent;
+	__u8 status = *((__u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED);
+	if (!sent)
+		return;
+
+	hci_dev_lock(hdev);
+
+	if (sent->le) {
+		hdev->features[1][0] |= LMP_HOST_LE;
+		hci_dev_set_flag(hdev, HCI_LE_ENABLED);
+	} else {
+		hdev->features[1][0] &= ~LMP_HOST_LE;
+		hci_dev_clear_flag(hdev, HCI_LE_ENABLED);
+		hci_dev_clear_flag(hdev, HCI_ADVERTISING);
+	}
+
+	if (sent->simul)
+		hdev->features[1][0] |= LMP_HOST_LE_BREDR;
+	else
+		hdev->features[1][0] &= ~LMP_HOST_LE_BREDR;
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_set_adv_param(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_cp_le_set_adv_param *cp;
+	u8 status = *((u8 *) skb->data);
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_PARAM);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+	hdev->adv_addr_type = cp->own_address_type;
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_set_ext_adv_param(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_le_set_ext_adv_params *rp = (void *) skb->data;
+	struct hci_cp_le_set_ext_adv_params *cp;
+	struct adv_info *adv_instance;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+	hdev->adv_addr_type = cp->own_addr_type;
+	if (!hdev->cur_adv_instance) {
+		/* Store in hdev for instance 0 */
+		hdev->adv_tx_power = rp->tx_power;
+	} else {
+		adv_instance = hci_find_adv_instance(hdev,
+						     hdev->cur_adv_instance);
+		if (adv_instance)
+			adv_instance->tx_power = rp->tx_power;
+	}
+	/* Update adv data as tx power is known now */
+	hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_read_rssi(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_read_rssi *rp = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
+	if (conn)
+		conn->rssi = rp->rssi;
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_read_tx_power(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_cp_read_tx_power *sent;
+	struct hci_rp_read_tx_power *rp = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER);
+	if (!sent)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
+	if (!conn)
+		goto unlock;
+
+	switch (sent->type) {
+	case 0x00:
+		conn->tx_power = rp->tx_power;
+		break;
+	case 0x01:
+		conn->max_tx_power = rp->tx_power;
+		break;
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	u8 status = *((u8 *) skb->data);
+	u8 *mode;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	mode = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE);
+	if (mode)
+		hdev->ssp_debug_mode = *mode;
+}
+
+static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
+{
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status) {
+		hci_conn_check_pending(hdev);
+		return;
+	}
+
+	if (hci_sent_cmd_data(hdev, HCI_OP_INQUIRY))
+		set_bit(HCI_INQUIRY, &hdev->flags);
+}
+
+static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
+{
+	struct hci_cp_create_conn *cp;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
+
+	BT_DBG("%s bdaddr %pMR hcon %p", hdev->name, &cp->bdaddr, conn);
+
+	if (status) {
+		if (conn && conn->state == BT_CONNECT) {
+			if (status != 0x0c || conn->attempt > 2) {
+				conn->state = BT_CLOSED;
+				hci_connect_cfm(conn, status);
+				hci_conn_del(conn);
+			} else
+				conn->state = BT_CONNECT2;
+		}
+	} else {
+		if (!conn) {
+			conn = hci_conn_add(hdev, ACL_LINK, &cp->bdaddr,
+					    HCI_ROLE_MASTER);
+			if (!conn)
+				bt_dev_err(hdev, "no memory for new connection");
+		}
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)
+{
+	struct hci_cp_add_sco *cp;
+	struct hci_conn *acl, *sco;
+	__u16 handle;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (!status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_ADD_SCO);
+	if (!cp)
+		return;
+
+	handle = __le16_to_cpu(cp->handle);
+
+	BT_DBG("%s handle 0x%4.4x", hdev->name, handle);
+
+	hci_dev_lock(hdev);
+
+	acl = hci_conn_hash_lookup_handle(hdev, handle);
+	if (acl) {
+		sco = acl->link;
+		if (sco) {
+			sco->state = BT_CLOSED;
+
+			hci_connect_cfm(sco, status);
+			hci_conn_del(sco);
+		}
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status)
+{
+	struct hci_cp_auth_requested *cp;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (!status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_AUTH_REQUESTED);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
+	if (conn) {
+		if (conn->state == BT_CONFIG) {
+			hci_connect_cfm(conn, status);
+			hci_conn_drop(conn);
+		}
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
+{
+	struct hci_cp_set_conn_encrypt *cp;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (!status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_SET_CONN_ENCRYPT);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
+	if (conn) {
+		if (conn->state == BT_CONFIG) {
+			hci_connect_cfm(conn, status);
+			hci_conn_drop(conn);
+		}
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static int hci_outgoing_auth_needed(struct hci_dev *hdev,
+				    struct hci_conn *conn)
+{
+	if (conn->state != BT_CONFIG || !conn->out)
+		return 0;
+
+	if (conn->pending_sec_level == BT_SECURITY_SDP)
+		return 0;
+
+	/* Only request authentication for SSP connections or non-SSP
+	 * devices with sec_level MEDIUM or HIGH or if MITM protection
+	 * is requested.
+	 */
+	if (!hci_conn_ssp_enabled(conn) && !(conn->auth_type & 0x01) &&
+	    conn->pending_sec_level != BT_SECURITY_FIPS &&
+	    conn->pending_sec_level != BT_SECURITY_HIGH &&
+	    conn->pending_sec_level != BT_SECURITY_MEDIUM)
+		return 0;
+
+	return 1;
+}
+
+static int hci_resolve_name(struct hci_dev *hdev,
+				   struct inquiry_entry *e)
+{
+	struct hci_cp_remote_name_req cp;
+
+	memset(&cp, 0, sizeof(cp));
+
+	bacpy(&cp.bdaddr, &e->data.bdaddr);
+	cp.pscan_rep_mode = e->data.pscan_rep_mode;
+	cp.pscan_mode = e->data.pscan_mode;
+	cp.clock_offset = e->data.clock_offset;
+
+	return hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
+}
+
+static bool hci_resolve_next_name(struct hci_dev *hdev)
+{
+	struct discovery_state *discov = &hdev->discovery;
+	struct inquiry_entry *e;
+
+	if (list_empty(&discov->resolve))
+		return false;
+
+	e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
+	if (!e)
+		return false;
+
+	if (hci_resolve_name(hdev, e) == 0) {
+		e->name_state = NAME_PENDING;
+		return true;
+	}
+
+	return false;
+}
+
+static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn,
+				   bdaddr_t *bdaddr, u8 *name, u8 name_len)
+{
+	struct discovery_state *discov = &hdev->discovery;
+	struct inquiry_entry *e;
+
+	/* Update the mgmt connected state if necessary. Be careful with
+	 * conn objects that exist but are not (yet) connected however.
+	 * Only those in BT_CONFIG or BT_CONNECTED states can be
+	 * considered connected.
+	 */
+	if (conn &&
+	    (conn->state == BT_CONFIG || conn->state == BT_CONNECTED) &&
+	    !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
+		mgmt_device_connected(hdev, conn, 0, name, name_len);
+
+	if (discov->state == DISCOVERY_STOPPED)
+		return;
+
+	if (discov->state == DISCOVERY_STOPPING)
+		goto discov_complete;
+
+	if (discov->state != DISCOVERY_RESOLVING)
+		return;
+
+	e = hci_inquiry_cache_lookup_resolve(hdev, bdaddr, NAME_PENDING);
+	/* If the device was not found in a list of found devices names of which
+	 * are pending. there is no need to continue resolving a next name as it
+	 * will be done upon receiving another Remote Name Request Complete
+	 * Event */
+	if (!e)
+		return;
+
+	list_del(&e->list);
+	if (name) {
+		e->name_state = NAME_KNOWN;
+		mgmt_remote_name(hdev, bdaddr, ACL_LINK, 0x00,
+				 e->data.rssi, name, name_len);
+	} else {
+		e->name_state = NAME_NOT_KNOWN;
+	}
+
+	if (hci_resolve_next_name(hdev))
+		return;
+
+discov_complete:
+	hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+}
+
+static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status)
+{
+	struct hci_cp_remote_name_req *cp;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	/* If successful wait for the name req complete event before
+	 * checking for the need to do authentication */
+	if (!status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
+
+	if (hci_dev_test_flag(hdev, HCI_MGMT))
+		hci_check_pending_name(hdev, conn, &cp->bdaddr, NULL, 0);
+
+	if (!conn)
+		goto unlock;
+
+	if (!hci_outgoing_auth_needed(hdev, conn))
+		goto unlock;
+
+	if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
+		struct hci_cp_auth_requested auth_cp;
+
+		set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
+
+		auth_cp.handle = __cpu_to_le16(conn->handle);
+		hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
+			     sizeof(auth_cp), &auth_cp);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status)
+{
+	struct hci_cp_read_remote_features *cp;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (!status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_FEATURES);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
+	if (conn) {
+		if (conn->state == BT_CONFIG) {
+			hci_connect_cfm(conn, status);
+			hci_conn_drop(conn);
+		}
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status)
+{
+	struct hci_cp_read_remote_ext_features *cp;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (!status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
+	if (conn) {
+		if (conn->state == BT_CONFIG) {
+			hci_connect_cfm(conn, status);
+			hci_conn_drop(conn);
+		}
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)
+{
+	struct hci_cp_setup_sync_conn *cp;
+	struct hci_conn *acl, *sco;
+	__u16 handle;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (!status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_SETUP_SYNC_CONN);
+	if (!cp)
+		return;
+
+	handle = __le16_to_cpu(cp->handle);
+
+	BT_DBG("%s handle 0x%4.4x", hdev->name, handle);
+
+	hci_dev_lock(hdev);
+
+	acl = hci_conn_hash_lookup_handle(hdev, handle);
+	if (acl) {
+		sco = acl->link;
+		if (sco) {
+			sco->state = BT_CLOSED;
+
+			hci_connect_cfm(sco, status);
+			hci_conn_del(sco);
+		}
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status)
+{
+	struct hci_cp_sniff_mode *cp;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (!status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_SNIFF_MODE);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
+	if (conn) {
+		clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
+
+		if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
+			hci_sco_setup(conn, status);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status)
+{
+	struct hci_cp_exit_sniff_mode *cp;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (!status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_EXIT_SNIFF_MODE);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
+	if (conn) {
+		clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
+
+		if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
+			hci_sco_setup(conn, status);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
+{
+	struct hci_cp_disconnect *cp;
+	struct hci_conn *conn;
+
+	if (!status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
+	if (conn) {
+		u8 type = conn->type;
+
+		mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
+				       conn->dst_type, status);
+
+		/* If the disconnection failed for any reason, the upper layer
+		 * does not retry to disconnect in current implementation.
+		 * Hence, we need to do some basic cleanup here and re-enable
+		 * advertising if necessary.
+		 */
+		hci_conn_del(conn);
+		if (type == LE_LINK)
+			hci_req_reenable_advertising(hdev);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void cs_le_create_conn(struct hci_dev *hdev, bdaddr_t *peer_addr,
+			      u8 peer_addr_type, u8 own_address_type,
+			      u8 filter_policy)
+{
+	struct hci_conn *conn;
+
+	conn = hci_conn_hash_lookup_le(hdev, peer_addr,
+				       peer_addr_type);
+	if (!conn)
+		return;
+
+	/* When using controller based address resolution, then the new
+	 * address types 0x02 and 0x03 are used. These types need to be
+	 * converted back into either public address or random address type
+	 */
+	if (use_ll_privacy(hdev) &&
+	    hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) {
+		switch (own_address_type) {
+		case ADDR_LE_DEV_PUBLIC_RESOLVED:
+			own_address_type = ADDR_LE_DEV_PUBLIC;
+			break;
+		case ADDR_LE_DEV_RANDOM_RESOLVED:
+			own_address_type = ADDR_LE_DEV_RANDOM;
+			break;
+		}
+	}
+
+	/* Store the initiator and responder address information which
+	 * is needed for SMP. These values will not change during the
+	 * lifetime of the connection.
+	 */
+	conn->init_addr_type = own_address_type;
+	if (own_address_type == ADDR_LE_DEV_RANDOM)
+		bacpy(&conn->init_addr, &hdev->random_addr);
+	else
+		bacpy(&conn->init_addr, &hdev->bdaddr);
+
+	conn->resp_addr_type = peer_addr_type;
+	bacpy(&conn->resp_addr, peer_addr);
+
+	/* We don't want the connection attempt to stick around
+	 * indefinitely since LE doesn't have a page timeout concept
+	 * like BR/EDR. Set a timer for any connection that doesn't use
+	 * the accept list for connecting.
+	 */
+	if (filter_policy == HCI_LE_USE_PEER_ADDR)
+		queue_delayed_work(conn->hdev->workqueue,
+				   &conn->le_conn_timeout,
+				   conn->conn_timeout);
+}
+
+static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status)
+{
+	struct hci_cp_le_create_conn *cp;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	/* All connection failure handling is taken care of by the
+	 * hci_le_conn_failed function which is triggered by the HCI
+	 * request completion callbacks used for connecting.
+	 */
+	if (status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CONN);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
+			  cp->own_address_type, cp->filter_policy);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status)
+{
+	struct hci_cp_le_ext_create_conn *cp;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	/* All connection failure handling is taken care of by the
+	 * hci_le_conn_failed function which is triggered by the HCI
+	 * request completion callbacks used for connecting.
+	 */
+	if (status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_LE_EXT_CREATE_CONN);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
+			  cp->own_addr_type, cp->filter_policy);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status)
+{
+	struct hci_cp_le_read_remote_features *cp;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (!status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_REMOTE_FEATURES);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
+	if (conn) {
+		if (conn->state == BT_CONFIG) {
+			hci_connect_cfm(conn, status);
+			hci_conn_drop(conn);
+		}
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status)
+{
+	struct hci_cp_le_start_enc *cp;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (!status)
+		return;
+
+	hci_dev_lock(hdev);
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_LE_START_ENC);
+	if (!cp)
+		goto unlock;
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
+	if (!conn)
+		goto unlock;
+
+	if (conn->state != BT_CONNECTED)
+		goto unlock;
+
+	hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
+	hci_conn_drop(conn);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cs_switch_role(struct hci_dev *hdev, u8 status)
+{
+	struct hci_cp_switch_role *cp;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (!status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_SWITCH_ROLE);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
+	if (conn)
+		clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_inquiry_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+	struct discovery_state *discov = &hdev->discovery;
+	struct inquiry_entry *e;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	hci_conn_check_pending(hdev);
+
+	if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags))
+		return;
+
+	smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
+	wake_up_bit(&hdev->flags, HCI_INQUIRY);
+
+	if (!hci_dev_test_flag(hdev, HCI_MGMT))
+		return;
+
+	hci_dev_lock(hdev);
+
+	if (discov->state != DISCOVERY_FINDING)
+		goto unlock;
+
+	if (list_empty(&discov->resolve)) {
+		/* When BR/EDR inquiry is active and no LE scanning is in
+		 * progress, then change discovery state to indicate completion.
+		 *
+		 * When running LE scanning and BR/EDR inquiry simultaneously
+		 * and the LE scan already finished, then change the discovery
+		 * state to indicate completion.
+		 */
+		if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
+		    !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
+			hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+		goto unlock;
+	}
+
+	e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
+	if (e && hci_resolve_name(hdev, e) == 0) {
+		e->name_state = NAME_PENDING;
+		hci_discovery_set_state(hdev, DISCOVERY_RESOLVING);
+	} else {
+		/* When BR/EDR inquiry is active and no LE scanning is in
+		 * progress, then change discovery state to indicate completion.
+		 *
+		 * When running LE scanning and BR/EDR inquiry simultaneously
+		 * and the LE scan already finished, then change the discovery
+		 * state to indicate completion.
+		 */
+		if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
+		    !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
+			hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_inquiry_result_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct inquiry_data data;
+	struct inquiry_info *info = (void *) (skb->data + 1);
+	int num_rsp = *((__u8 *) skb->data);
+
+	BT_DBG("%s num_rsp %d", hdev->name, num_rsp);
+
+	if (!num_rsp || skb->len < num_rsp * sizeof(*info) + 1)
+		return;
+
+	if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
+		return;
+
+	hci_dev_lock(hdev);
+
+	for (; num_rsp; num_rsp--, info++) {
+		u32 flags;
+
+		bacpy(&data.bdaddr, &info->bdaddr);
+		data.pscan_rep_mode	= info->pscan_rep_mode;
+		data.pscan_period_mode	= info->pscan_period_mode;
+		data.pscan_mode		= info->pscan_mode;
+		memcpy(data.dev_class, info->dev_class, 3);
+		data.clock_offset	= info->clock_offset;
+		data.rssi		= HCI_RSSI_INVALID;
+		data.ssp_mode		= 0x00;
+
+		flags = hci_inquiry_cache_update(hdev, &data, false);
+
+		mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
+				  info->dev_class, HCI_RSSI_INVALID,
+				  flags, NULL, 0, NULL, 0);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_conn_complete *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
+	if (!conn) {
+		/* Connection may not exist if auto-connected. Check the bredr
+		 * allowlist to see if this device is allowed to auto connect.
+		 * If link is an ACL type, create a connection class
+		 * automatically.
+		 *
+		 * Auto-connect will only occur if the event filter is
+		 * programmed with a given address. Right now, event filter is
+		 * only used during suspend.
+		 */
+		if (ev->link_type == ACL_LINK &&
+		    hci_bdaddr_list_lookup_with_flags(&hdev->accept_list,
+						      &ev->bdaddr,
+						      BDADDR_BREDR)) {
+			conn = hci_conn_add(hdev, ev->link_type, &ev->bdaddr,
+					    HCI_ROLE_SLAVE);
+			if (!conn) {
+				bt_dev_err(hdev, "no memory for new conn");
+				goto unlock;
+			}
+		} else {
+			if (ev->link_type != SCO_LINK)
+				goto unlock;
+
+			conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK,
+						       &ev->bdaddr);
+			if (!conn)
+				goto unlock;
+
+			conn->type = SCO_LINK;
+		}
+	}
+
+	if (!ev->status) {
+		conn->handle = __le16_to_cpu(ev->handle);
+
+		if (conn->type == ACL_LINK) {
+			conn->state = BT_CONFIG;
+			hci_conn_hold(conn);
+
+			if (!conn->out && !hci_conn_ssp_enabled(conn) &&
+			    !hci_find_link_key(hdev, &ev->bdaddr))
+				conn->disc_timeout = HCI_PAIRING_TIMEOUT;
+			else
+				conn->disc_timeout = HCI_DISCONN_TIMEOUT;
+		} else
+			conn->state = BT_CONNECTED;
+
+		hci_debugfs_create_conn(conn);
+		hci_conn_add_sysfs(conn);
+
+		if (test_bit(HCI_AUTH, &hdev->flags))
+			set_bit(HCI_CONN_AUTH, &conn->flags);
+
+		if (test_bit(HCI_ENCRYPT, &hdev->flags))
+			set_bit(HCI_CONN_ENCRYPT, &conn->flags);
+
+		/* Get remote features */
+		if (conn->type == ACL_LINK) {
+			struct hci_cp_read_remote_features cp;
+			cp.handle = ev->handle;
+			hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES,
+				     sizeof(cp), &cp);
+
+			hci_req_update_scan(hdev);
+		}
+
+		/* Set packet type for incoming connection */
+		if (!conn->out && hdev->hci_ver < BLUETOOTH_VER_2_0) {
+			struct hci_cp_change_conn_ptype cp;
+			cp.handle = ev->handle;
+			cp.pkt_type = cpu_to_le16(conn->pkt_type);
+			hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp),
+				     &cp);
+		}
+	} else {
+		conn->state = BT_CLOSED;
+		if (conn->type == ACL_LINK)
+			mgmt_connect_failed(hdev, &conn->dst, conn->type,
+					    conn->dst_type, ev->status);
+	}
+
+	if (conn->type == ACL_LINK)
+		hci_sco_setup(conn, ev->status);
+
+	if (ev->status) {
+		hci_connect_cfm(conn, ev->status);
+		hci_conn_del(conn);
+	} else if (ev->link_type == SCO_LINK) {
+		switch (conn->setting & SCO_AIRMODE_MASK) {
+		case SCO_AIRMODE_CVSD:
+			if (hdev->notify)
+				hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
+			break;
+		}
+
+		hci_connect_cfm(conn, ev->status);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+
+	hci_conn_check_pending(hdev);
+}
+
+static void hci_reject_conn(struct hci_dev *hdev, bdaddr_t *bdaddr)
+{
+	struct hci_cp_reject_conn_req cp;
+
+	bacpy(&cp.bdaddr, bdaddr);
+	cp.reason = HCI_ERROR_REJ_BAD_ADDR;
+	hci_send_cmd(hdev, HCI_OP_REJECT_CONN_REQ, sizeof(cp), &cp);
+}
+
+static void hci_conn_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_conn_request *ev = (void *) skb->data;
+	int mask = hdev->link_mode;
+	struct inquiry_entry *ie;
+	struct hci_conn *conn;
+	__u8 flags = 0;
+
+	BT_DBG("%s bdaddr %pMR type 0x%x", hdev->name, &ev->bdaddr,
+	       ev->link_type);
+
+	/* Reject incoming connection from device with same BD ADDR against
+	 * CVE-2020-26555
+	 */
+	if (hdev && !bacmp(&hdev->bdaddr, &ev->bdaddr)) {
+		bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
+			   &ev->bdaddr);
+		hci_reject_conn(hdev, &ev->bdaddr);
+		return;
+	}
+
+	mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type,
+				      &flags);
+
+	if (!(mask & HCI_LM_ACCEPT)) {
+		hci_reject_conn(hdev, &ev->bdaddr);
+		return;
+	}
+
+	hci_dev_lock(hdev);
+
+	if (hci_bdaddr_list_lookup(&hdev->reject_list, &ev->bdaddr,
+				   BDADDR_BREDR)) {
+		hci_reject_conn(hdev, &ev->bdaddr);
+		goto unlock;
+	}
+
+	/* Require HCI_CONNECTABLE or an accept list entry to accept the
+	 * connection. These features are only touched through mgmt so
+	 * only do the checks if HCI_MGMT is set.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_MGMT) &&
+	    !hci_dev_test_flag(hdev, HCI_CONNECTABLE) &&
+	    !hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, &ev->bdaddr,
+					       BDADDR_BREDR)) {
+		hci_reject_conn(hdev, &ev->bdaddr);
+		goto unlock;
+	}
+
+	/* Connection accepted */
+
+	ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
+	if (ie)
+		memcpy(ie->data.dev_class, ev->dev_class, 3);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ev->link_type,
+			&ev->bdaddr);
+	if (!conn) {
+		conn = hci_conn_add(hdev, ev->link_type, &ev->bdaddr,
+				    HCI_ROLE_SLAVE);
+		if (!conn) {
+			bt_dev_err(hdev, "no memory for new connection");
+			goto unlock;
+		}
+	}
+
+	memcpy(conn->dev_class, ev->dev_class, 3);
+
+	hci_dev_unlock(hdev);
+
+	if (ev->link_type == ACL_LINK ||
+	    (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) {
+		struct hci_cp_accept_conn_req cp;
+		conn->state = BT_CONNECT;
+
+		bacpy(&cp.bdaddr, &ev->bdaddr);
+
+		if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER))
+			cp.role = 0x00; /* Become central */
+		else
+			cp.role = 0x01; /* Remain peripheral */
+
+		hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
+	} else if (!(flags & HCI_PROTO_DEFER)) {
+		struct hci_cp_accept_sync_conn_req cp;
+		conn->state = BT_CONNECT;
+
+		bacpy(&cp.bdaddr, &ev->bdaddr);
+		cp.pkt_type = cpu_to_le16(conn->pkt_type);
+
+		cp.tx_bandwidth   = cpu_to_le32(0x00001f40);
+		cp.rx_bandwidth   = cpu_to_le32(0x00001f40);
+		cp.max_latency    = cpu_to_le16(0xffff);
+		cp.content_format = cpu_to_le16(hdev->voice_setting);
+		cp.retrans_effort = 0xff;
+
+		hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp),
+			     &cp);
+	} else {
+		conn->state = BT_CONNECT2;
+		hci_connect_cfm(conn, 0);
+	}
+
+	return;
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static u8 hci_to_mgmt_reason(u8 err)
+{
+	switch (err) {
+	case HCI_ERROR_CONNECTION_TIMEOUT:
+		return MGMT_DEV_DISCONN_TIMEOUT;
+	case HCI_ERROR_REMOTE_USER_TERM:
+	case HCI_ERROR_REMOTE_LOW_RESOURCES:
+	case HCI_ERROR_REMOTE_POWER_OFF:
+		return MGMT_DEV_DISCONN_REMOTE;
+	case HCI_ERROR_LOCAL_HOST_TERM:
+		return MGMT_DEV_DISCONN_LOCAL_HOST;
+	default:
+		return MGMT_DEV_DISCONN_UNKNOWN;
+	}
+}
+
+static void hci_disconn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_disconn_complete *ev = (void *) skb->data;
+	u8 reason;
+	struct hci_conn_params *params;
+	struct hci_conn *conn;
+	bool mgmt_connected;
+	u8 type;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+	if (!conn)
+		goto unlock;
+
+	if (ev->status) {
+		mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
+				       conn->dst_type, ev->status);
+		goto unlock;
+	}
+
+	conn->state = BT_CLOSED;
+
+	mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
+
+	if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags))
+		reason = MGMT_DEV_DISCONN_AUTH_FAILURE;
+	else
+		reason = hci_to_mgmt_reason(ev->reason);
+
+	mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
+				reason, mgmt_connected);
+
+	if (conn->type == ACL_LINK) {
+		if (test_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
+			hci_remove_link_key(hdev, &conn->dst);
+
+		hci_req_update_scan(hdev);
+	}
+
+	params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
+	if (params) {
+		switch (params->auto_connect) {
+		case HCI_AUTO_CONN_LINK_LOSS:
+			if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT)
+				break;
+			fallthrough;
+
+		case HCI_AUTO_CONN_DIRECT:
+		case HCI_AUTO_CONN_ALWAYS:
+			list_del_init(&params->action);
+			list_add(&params->action, &hdev->pend_le_conns);
+			hci_update_background_scan(hdev);
+			break;
+
+		default:
+			break;
+		}
+	}
+
+	type = conn->type;
+
+	hci_disconn_cfm(conn, ev->reason);
+	hci_conn_del(conn);
+
+	/* The suspend notifier is waiting for all devices to disconnect so
+	 * clear the bit from pending tasks and inform the wait queue.
+	 */
+	if (list_empty(&hdev->conn_hash.list) &&
+	    test_and_clear_bit(SUSPEND_DISCONNECTING, hdev->suspend_tasks)) {
+		wake_up(&hdev->suspend_wait_q);
+	}
+
+	/* Re-enable advertising if necessary, since it might
+	 * have been disabled by the connection. From the
+	 * HCI_LE_Set_Advertise_Enable command description in
+	 * the core specification (v4.0):
+	 * "The Controller shall continue advertising until the Host
+	 * issues an LE_Set_Advertise_Enable command with
+	 * Advertising_Enable set to 0x00 (Advertising is disabled)
+	 * or until a connection is created or until the Advertising
+	 * is timed out due to Directed Advertising."
+	 */
+	if (type == LE_LINK)
+		hci_req_reenable_advertising(hdev);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_auth_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_auth_complete *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+	if (!conn)
+		goto unlock;
+
+	if (!ev->status) {
+		clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
+		set_bit(HCI_CONN_AUTH, &conn->flags);
+		conn->sec_level = conn->pending_sec_level;
+	} else {
+		if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
+			set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
+
+		mgmt_auth_failed(conn, ev->status);
+	}
+
+	clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
+
+	if (conn->state == BT_CONFIG) {
+		if (!ev->status && hci_conn_ssp_enabled(conn)) {
+			struct hci_cp_set_conn_encrypt cp;
+			cp.handle  = ev->handle;
+			cp.encrypt = 0x01;
+			hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
+				     &cp);
+		} else {
+			conn->state = BT_CONNECTED;
+			hci_connect_cfm(conn, ev->status);
+			hci_conn_drop(conn);
+		}
+	} else {
+		hci_auth_cfm(conn, ev->status);
+
+		hci_conn_hold(conn);
+		conn->disc_timeout = HCI_DISCONN_TIMEOUT;
+		hci_conn_drop(conn);
+	}
+
+	if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
+		if (!ev->status) {
+			struct hci_cp_set_conn_encrypt cp;
+			cp.handle  = ev->handle;
+			cp.encrypt = 0x01;
+			hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
+				     &cp);
+		} else {
+			clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
+			hci_encrypt_cfm(conn, ev->status);
+		}
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_remote_name_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_remote_name *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_conn_check_pending(hdev);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
+
+	if (!hci_dev_test_flag(hdev, HCI_MGMT))
+		goto check_auth;
+
+	if (ev->status == 0)
+		hci_check_pending_name(hdev, conn, &ev->bdaddr, ev->name,
+				       strnlen(ev->name, HCI_MAX_NAME_LENGTH));
+	else
+		hci_check_pending_name(hdev, conn, &ev->bdaddr, NULL, 0);
+
+check_auth:
+	if (!conn)
+		goto unlock;
+
+	if (!hci_outgoing_auth_needed(hdev, conn))
+		goto unlock;
+
+	if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
+		struct hci_cp_auth_requested cp;
+
+		set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
+
+		cp.handle = __cpu_to_le16(conn->handle);
+		hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void read_enc_key_size_complete(struct hci_dev *hdev, u8 status,
+				       u16 opcode, struct sk_buff *skb)
+{
+	const struct hci_rp_read_enc_key_size *rp;
+	struct hci_conn *conn;
+	u16 handle;
+
+	BT_DBG("%s status 0x%02x", hdev->name, status);
+
+	if (!skb || skb->len < sizeof(*rp)) {
+		bt_dev_err(hdev, "invalid read key size response");
+		return;
+	}
+
+	rp = (void *)skb->data;
+	handle = le16_to_cpu(rp->handle);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, handle);
+	if (!conn)
+		goto unlock;
+
+	/* While unexpected, the read_enc_key_size command may fail. The most
+	 * secure approach is to then assume the key size is 0 to force a
+	 * disconnection.
+	 */
+	if (rp->status) {
+		bt_dev_err(hdev, "failed to read key size for handle %u",
+			   handle);
+		conn->enc_key_size = 0;
+	} else {
+		conn->enc_key_size = rp->key_size;
+	}
+
+	hci_encrypt_cfm(conn, 0);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_encrypt_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_encrypt_change *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+	if (!conn)
+		goto unlock;
+
+	if (!ev->status) {
+		if (ev->encrypt) {
+			/* Encryption implies authentication */
+			set_bit(HCI_CONN_AUTH, &conn->flags);
+			set_bit(HCI_CONN_ENCRYPT, &conn->flags);
+			conn->sec_level = conn->pending_sec_level;
+
+			/* P-256 authentication key implies FIPS */
+			if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256)
+				set_bit(HCI_CONN_FIPS, &conn->flags);
+
+			if ((conn->type == ACL_LINK && ev->encrypt == 0x02) ||
+			    conn->type == LE_LINK)
+				set_bit(HCI_CONN_AES_CCM, &conn->flags);
+		} else {
+			clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
+			clear_bit(HCI_CONN_AES_CCM, &conn->flags);
+		}
+	}
+
+	/* We should disregard the current RPA and generate a new one
+	 * whenever the encryption procedure fails.
+	 */
+	if (ev->status && conn->type == LE_LINK) {
+		hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
+		hci_adv_instances_set_rpa_expired(hdev, true);
+	}
+
+	clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
+
+	/* Check link security requirements are met */
+	if (!hci_conn_check_link_mode(conn))
+		ev->status = HCI_ERROR_AUTH_FAILURE;
+
+	if (ev->status && conn->state == BT_CONNECTED) {
+		if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
+			set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
+
+		/* Notify upper layers so they can cleanup before
+		 * disconnecting.
+		 */
+		hci_encrypt_cfm(conn, ev->status);
+		hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
+		hci_conn_drop(conn);
+		goto unlock;
+	}
+
+	/* Try reading the encryption key size for encrypted ACL links */
+	if (!ev->status && ev->encrypt && conn->type == ACL_LINK) {
+		struct hci_cp_read_enc_key_size cp;
+		struct hci_request req;
+
+		/* Only send HCI_Read_Encryption_Key_Size if the
+		 * controller really supports it. If it doesn't, assume
+		 * the default size (16).
+		 */
+		if (!(hdev->commands[20] & 0x10)) {
+			conn->enc_key_size = HCI_LINK_KEY_SIZE;
+			goto notify;
+		}
+
+		hci_req_init(&req, hdev);
+
+		cp.handle = cpu_to_le16(conn->handle);
+		hci_req_add(&req, HCI_OP_READ_ENC_KEY_SIZE, sizeof(cp), &cp);
+
+		if (hci_req_run_skb(&req, read_enc_key_size_complete)) {
+			bt_dev_err(hdev, "sending read key size failed");
+			conn->enc_key_size = HCI_LINK_KEY_SIZE;
+			goto notify;
+		}
+
+		goto unlock;
+	}
+
+	/* Set the default Authenticated Payload Timeout after
+	 * an LE Link is established. As per Core Spec v5.0, Vol 2, Part B
+	 * Section 3.3, the HCI command WRITE_AUTH_PAYLOAD_TIMEOUT should be
+	 * sent when the link is active and Encryption is enabled, the conn
+	 * type can be either LE or ACL and controller must support LMP Ping.
+	 * Ensure for AES-CCM encryption as well.
+	 */
+	if (test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
+	    test_bit(HCI_CONN_AES_CCM, &conn->flags) &&
+	    ((conn->type == ACL_LINK && lmp_ping_capable(hdev)) ||
+	     (conn->type == LE_LINK && (hdev->le_features[0] & HCI_LE_PING)))) {
+		struct hci_cp_write_auth_payload_to cp;
+
+		cp.handle = cpu_to_le16(conn->handle);
+		cp.timeout = cpu_to_le16(hdev->auth_payload_timeout);
+		hci_send_cmd(conn->hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO,
+			     sizeof(cp), &cp);
+	}
+
+notify:
+	hci_encrypt_cfm(conn, ev->status);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_change_link_key_complete_evt(struct hci_dev *hdev,
+					     struct sk_buff *skb)
+{
+	struct hci_ev_change_link_key_complete *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+	if (conn) {
+		if (!ev->status)
+			set_bit(HCI_CONN_SECURE, &conn->flags);
+
+		clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
+
+		hci_key_change_cfm(conn, ev->status);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_remote_features_evt(struct hci_dev *hdev,
+				    struct sk_buff *skb)
+{
+	struct hci_ev_remote_features *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+	if (!conn)
+		goto unlock;
+
+	if (!ev->status)
+		memcpy(conn->features[0], ev->features, 8);
+
+	if (conn->state != BT_CONFIG)
+		goto unlock;
+
+	if (!ev->status && lmp_ext_feat_capable(hdev) &&
+	    lmp_ext_feat_capable(conn)) {
+		struct hci_cp_read_remote_ext_features cp;
+		cp.handle = ev->handle;
+		cp.page = 0x01;
+		hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES,
+			     sizeof(cp), &cp);
+		goto unlock;
+	}
+
+	if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
+		struct hci_cp_remote_name_req cp;
+		memset(&cp, 0, sizeof(cp));
+		bacpy(&cp.bdaddr, &conn->dst);
+		cp.pscan_rep_mode = 0x02;
+		hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
+	} else if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
+		mgmt_device_connected(hdev, conn, 0, NULL, 0);
+
+	if (!hci_outgoing_auth_needed(hdev, conn)) {
+		conn->state = BT_CONNECTED;
+		hci_connect_cfm(conn, ev->status);
+		hci_conn_drop(conn);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb,
+				 u16 *opcode, u8 *status,
+				 hci_req_complete_t *req_complete,
+				 hci_req_complete_skb_t *req_complete_skb)
+{
+	struct hci_ev_cmd_complete *ev = (void *) skb->data;
+
+	*opcode = __le16_to_cpu(ev->opcode);
+	*status = skb->data[sizeof(*ev)];
+
+	skb_pull(skb, sizeof(*ev));
+
+	switch (*opcode) {
+	case HCI_OP_INQUIRY_CANCEL:
+		hci_cc_inquiry_cancel(hdev, skb, status);
+		break;
+
+	case HCI_OP_PERIODIC_INQ:
+		hci_cc_periodic_inq(hdev, skb);
+		break;
+
+	case HCI_OP_EXIT_PERIODIC_INQ:
+		hci_cc_exit_periodic_inq(hdev, skb);
+		break;
+
+	case HCI_OP_REMOTE_NAME_REQ_CANCEL:
+		hci_cc_remote_name_req_cancel(hdev, skb);
+		break;
+
+	case HCI_OP_ROLE_DISCOVERY:
+		hci_cc_role_discovery(hdev, skb);
+		break;
+
+	case HCI_OP_READ_LINK_POLICY:
+		hci_cc_read_link_policy(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_LINK_POLICY:
+		hci_cc_write_link_policy(hdev, skb);
+		break;
+
+	case HCI_OP_READ_DEF_LINK_POLICY:
+		hci_cc_read_def_link_policy(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_DEF_LINK_POLICY:
+		hci_cc_write_def_link_policy(hdev, skb);
+		break;
+
+	case HCI_OP_RESET:
+		hci_cc_reset(hdev, skb);
+		break;
+
+	case HCI_OP_READ_STORED_LINK_KEY:
+		hci_cc_read_stored_link_key(hdev, skb);
+		break;
+
+	case HCI_OP_DELETE_STORED_LINK_KEY:
+		hci_cc_delete_stored_link_key(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_LOCAL_NAME:
+		hci_cc_write_local_name(hdev, skb);
+		break;
+
+	case HCI_OP_READ_LOCAL_NAME:
+		hci_cc_read_local_name(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_AUTH_ENABLE:
+		hci_cc_write_auth_enable(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_ENCRYPT_MODE:
+		hci_cc_write_encrypt_mode(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_SCAN_ENABLE:
+		hci_cc_write_scan_enable(hdev, skb);
+		break;
+
+	case HCI_OP_READ_CLASS_OF_DEV:
+		hci_cc_read_class_of_dev(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_CLASS_OF_DEV:
+		hci_cc_write_class_of_dev(hdev, skb);
+		break;
+
+	case HCI_OP_READ_VOICE_SETTING:
+		hci_cc_read_voice_setting(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_VOICE_SETTING:
+		hci_cc_write_voice_setting(hdev, skb);
+		break;
+
+	case HCI_OP_READ_NUM_SUPPORTED_IAC:
+		hci_cc_read_num_supported_iac(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_SSP_MODE:
+		hci_cc_write_ssp_mode(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_SC_SUPPORT:
+		hci_cc_write_sc_support(hdev, skb);
+		break;
+
+	case HCI_OP_READ_AUTH_PAYLOAD_TO:
+		hci_cc_read_auth_payload_timeout(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_AUTH_PAYLOAD_TO:
+		hci_cc_write_auth_payload_timeout(hdev, skb);
+		break;
+
+	case HCI_OP_READ_LOCAL_VERSION:
+		hci_cc_read_local_version(hdev, skb);
+		break;
+
+	case HCI_OP_READ_LOCAL_COMMANDS:
+		hci_cc_read_local_commands(hdev, skb);
+		break;
+
+	case HCI_OP_READ_LOCAL_FEATURES:
+		hci_cc_read_local_features(hdev, skb);
+		break;
+
+	case HCI_OP_READ_LOCAL_EXT_FEATURES:
+		hci_cc_read_local_ext_features(hdev, skb);
+		break;
+
+	case HCI_OP_READ_BUFFER_SIZE:
+		hci_cc_read_buffer_size(hdev, skb);
+		break;
+
+	case HCI_OP_READ_BD_ADDR:
+		hci_cc_read_bd_addr(hdev, skb);
+		break;
+
+	case HCI_OP_READ_LOCAL_PAIRING_OPTS:
+		hci_cc_read_local_pairing_opts(hdev, skb);
+		break;
+
+	case HCI_OP_READ_PAGE_SCAN_ACTIVITY:
+		hci_cc_read_page_scan_activity(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_PAGE_SCAN_ACTIVITY:
+		hci_cc_write_page_scan_activity(hdev, skb);
+		break;
+
+	case HCI_OP_READ_PAGE_SCAN_TYPE:
+		hci_cc_read_page_scan_type(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_PAGE_SCAN_TYPE:
+		hci_cc_write_page_scan_type(hdev, skb);
+		break;
+
+	case HCI_OP_READ_DATA_BLOCK_SIZE:
+		hci_cc_read_data_block_size(hdev, skb);
+		break;
+
+	case HCI_OP_READ_FLOW_CONTROL_MODE:
+		hci_cc_read_flow_control_mode(hdev, skb);
+		break;
+
+	case HCI_OP_READ_LOCAL_AMP_INFO:
+		hci_cc_read_local_amp_info(hdev, skb);
+		break;
+
+	case HCI_OP_READ_CLOCK:
+		hci_cc_read_clock(hdev, skb);
+		break;
+
+	case HCI_OP_READ_INQ_RSP_TX_POWER:
+		hci_cc_read_inq_rsp_tx_power(hdev, skb);
+		break;
+
+	case HCI_OP_READ_DEF_ERR_DATA_REPORTING:
+		hci_cc_read_def_err_data_reporting(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_DEF_ERR_DATA_REPORTING:
+		hci_cc_write_def_err_data_reporting(hdev, skb);
+		break;
+
+	case HCI_OP_PIN_CODE_REPLY:
+		hci_cc_pin_code_reply(hdev, skb);
+		break;
+
+	case HCI_OP_PIN_CODE_NEG_REPLY:
+		hci_cc_pin_code_neg_reply(hdev, skb);
+		break;
+
+	case HCI_OP_READ_LOCAL_OOB_DATA:
+		hci_cc_read_local_oob_data(hdev, skb);
+		break;
+
+	case HCI_OP_READ_LOCAL_OOB_EXT_DATA:
+		hci_cc_read_local_oob_ext_data(hdev, skb);
+		break;
+
+	case HCI_OP_LE_READ_BUFFER_SIZE:
+		hci_cc_le_read_buffer_size(hdev, skb);
+		break;
+
+	case HCI_OP_LE_READ_LOCAL_FEATURES:
+		hci_cc_le_read_local_features(hdev, skb);
+		break;
+
+	case HCI_OP_LE_READ_ADV_TX_POWER:
+		hci_cc_le_read_adv_tx_power(hdev, skb);
+		break;
+
+	case HCI_OP_USER_CONFIRM_REPLY:
+		hci_cc_user_confirm_reply(hdev, skb);
+		break;
+
+	case HCI_OP_USER_CONFIRM_NEG_REPLY:
+		hci_cc_user_confirm_neg_reply(hdev, skb);
+		break;
+
+	case HCI_OP_USER_PASSKEY_REPLY:
+		hci_cc_user_passkey_reply(hdev, skb);
+		break;
+
+	case HCI_OP_USER_PASSKEY_NEG_REPLY:
+		hci_cc_user_passkey_neg_reply(hdev, skb);
+		break;
+
+	case HCI_OP_LE_SET_RANDOM_ADDR:
+		hci_cc_le_set_random_addr(hdev, skb);
+		break;
+
+	case HCI_OP_LE_SET_ADV_ENABLE:
+		hci_cc_le_set_adv_enable(hdev, skb);
+		break;
+
+	case HCI_OP_LE_SET_SCAN_PARAM:
+		hci_cc_le_set_scan_param(hdev, skb);
+		break;
+
+	case HCI_OP_LE_SET_SCAN_ENABLE:
+		hci_cc_le_set_scan_enable(hdev, skb);
+		break;
+
+	case HCI_OP_LE_READ_ACCEPT_LIST_SIZE:
+		hci_cc_le_read_accept_list_size(hdev, skb);
+		break;
+
+	case HCI_OP_LE_CLEAR_ACCEPT_LIST:
+		hci_cc_le_clear_accept_list(hdev, skb);
+		break;
+
+	case HCI_OP_LE_ADD_TO_ACCEPT_LIST:
+		hci_cc_le_add_to_accept_list(hdev, skb);
+		break;
+
+	case HCI_OP_LE_DEL_FROM_ACCEPT_LIST:
+		hci_cc_le_del_from_accept_list(hdev, skb);
+		break;
+
+	case HCI_OP_LE_READ_SUPPORTED_STATES:
+		hci_cc_le_read_supported_states(hdev, skb);
+		break;
+
+	case HCI_OP_LE_READ_DEF_DATA_LEN:
+		hci_cc_le_read_def_data_len(hdev, skb);
+		break;
+
+	case HCI_OP_LE_WRITE_DEF_DATA_LEN:
+		hci_cc_le_write_def_data_len(hdev, skb);
+		break;
+
+	case HCI_OP_LE_ADD_TO_RESOLV_LIST:
+		hci_cc_le_add_to_resolv_list(hdev, skb);
+		break;
+
+	case HCI_OP_LE_DEL_FROM_RESOLV_LIST:
+		hci_cc_le_del_from_resolv_list(hdev, skb);
+		break;
+
+	case HCI_OP_LE_CLEAR_RESOLV_LIST:
+		hci_cc_le_clear_resolv_list(hdev, skb);
+		break;
+
+	case HCI_OP_LE_READ_RESOLV_LIST_SIZE:
+		hci_cc_le_read_resolv_list_size(hdev, skb);
+		break;
+
+	case HCI_OP_LE_SET_ADDR_RESOLV_ENABLE:
+		hci_cc_le_set_addr_resolution_enable(hdev, skb);
+		break;
+
+	case HCI_OP_LE_READ_MAX_DATA_LEN:
+		hci_cc_le_read_max_data_len(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_LE_HOST_SUPPORTED:
+		hci_cc_write_le_host_supported(hdev, skb);
+		break;
+
+	case HCI_OP_LE_SET_ADV_PARAM:
+		hci_cc_set_adv_param(hdev, skb);
+		break;
+
+	case HCI_OP_READ_RSSI:
+		hci_cc_read_rssi(hdev, skb);
+		break;
+
+	case HCI_OP_READ_TX_POWER:
+		hci_cc_read_tx_power(hdev, skb);
+		break;
+
+	case HCI_OP_WRITE_SSP_DEBUG_MODE:
+		hci_cc_write_ssp_debug_mode(hdev, skb);
+		break;
+
+	case HCI_OP_LE_SET_EXT_SCAN_PARAMS:
+		hci_cc_le_set_ext_scan_param(hdev, skb);
+		break;
+
+	case HCI_OP_LE_SET_EXT_SCAN_ENABLE:
+		hci_cc_le_set_ext_scan_enable(hdev, skb);
+		break;
+
+	case HCI_OP_LE_SET_DEFAULT_PHY:
+		hci_cc_le_set_default_phy(hdev, skb);
+		break;
+
+	case HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS:
+		hci_cc_le_read_num_adv_sets(hdev, skb);
+		break;
+
+	case HCI_OP_LE_SET_EXT_ADV_PARAMS:
+		hci_cc_set_ext_adv_param(hdev, skb);
+		break;
+
+	case HCI_OP_LE_SET_EXT_ADV_ENABLE:
+		hci_cc_le_set_ext_adv_enable(hdev, skb);
+		break;
+
+	case HCI_OP_LE_SET_ADV_SET_RAND_ADDR:
+		hci_cc_le_set_adv_set_random_addr(hdev, skb);
+		break;
+
+	default:
+		BT_DBG("%s opcode 0x%4.4x", hdev->name, *opcode);
+		break;
+	}
+
+	if (*opcode != HCI_OP_NOP)
+		cancel_delayed_work(&hdev->cmd_timer);
+
+	if (ev->ncmd && !test_bit(HCI_RESET, &hdev->flags))
+		atomic_set(&hdev->cmd_cnt, 1);
+
+	hci_req_cmd_complete(hdev, *opcode, *status, req_complete,
+			     req_complete_skb);
+
+	if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
+		bt_dev_err(hdev,
+			   "unexpected event for opcode 0x%4.4x", *opcode);
+		return;
+	}
+
+	if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
+		queue_work(hdev->workqueue, &hdev->cmd_work);
+}
+
+static void hci_cmd_status_evt(struct hci_dev *hdev, struct sk_buff *skb,
+			       u16 *opcode, u8 *status,
+			       hci_req_complete_t *req_complete,
+			       hci_req_complete_skb_t *req_complete_skb)
+{
+	struct hci_ev_cmd_status *ev = (void *) skb->data;
+
+	skb_pull(skb, sizeof(*ev));
+
+	*opcode = __le16_to_cpu(ev->opcode);
+	*status = ev->status;
+
+	switch (*opcode) {
+	case HCI_OP_INQUIRY:
+		hci_cs_inquiry(hdev, ev->status);
+		break;
+
+	case HCI_OP_CREATE_CONN:
+		hci_cs_create_conn(hdev, ev->status);
+		break;
+
+	case HCI_OP_DISCONNECT:
+		hci_cs_disconnect(hdev, ev->status);
+		break;
+
+	case HCI_OP_ADD_SCO:
+		hci_cs_add_sco(hdev, ev->status);
+		break;
+
+	case HCI_OP_AUTH_REQUESTED:
+		hci_cs_auth_requested(hdev, ev->status);
+		break;
+
+	case HCI_OP_SET_CONN_ENCRYPT:
+		hci_cs_set_conn_encrypt(hdev, ev->status);
+		break;
+
+	case HCI_OP_REMOTE_NAME_REQ:
+		hci_cs_remote_name_req(hdev, ev->status);
+		break;
+
+	case HCI_OP_READ_REMOTE_FEATURES:
+		hci_cs_read_remote_features(hdev, ev->status);
+		break;
+
+	case HCI_OP_READ_REMOTE_EXT_FEATURES:
+		hci_cs_read_remote_ext_features(hdev, ev->status);
+		break;
+
+	case HCI_OP_SETUP_SYNC_CONN:
+		hci_cs_setup_sync_conn(hdev, ev->status);
+		break;
+
+	case HCI_OP_SNIFF_MODE:
+		hci_cs_sniff_mode(hdev, ev->status);
+		break;
+
+	case HCI_OP_EXIT_SNIFF_MODE:
+		hci_cs_exit_sniff_mode(hdev, ev->status);
+		break;
+
+	case HCI_OP_SWITCH_ROLE:
+		hci_cs_switch_role(hdev, ev->status);
+		break;
+
+	case HCI_OP_LE_CREATE_CONN:
+		hci_cs_le_create_conn(hdev, ev->status);
+		break;
+
+	case HCI_OP_LE_READ_REMOTE_FEATURES:
+		hci_cs_le_read_remote_features(hdev, ev->status);
+		break;
+
+	case HCI_OP_LE_START_ENC:
+		hci_cs_le_start_enc(hdev, ev->status);
+		break;
+
+	case HCI_OP_LE_EXT_CREATE_CONN:
+		hci_cs_le_ext_create_conn(hdev, ev->status);
+		break;
+
+	default:
+		BT_DBG("%s opcode 0x%4.4x", hdev->name, *opcode);
+		break;
+	}
+
+	if (*opcode != HCI_OP_NOP)
+		cancel_delayed_work(&hdev->cmd_timer);
+
+	if (ev->ncmd && !test_bit(HCI_RESET, &hdev->flags))
+		atomic_set(&hdev->cmd_cnt, 1);
+
+	/* Indicate request completion if the command failed. Also, if
+	 * we're not waiting for a special event and we get a success
+	 * command status we should try to flag the request as completed
+	 * (since for this kind of commands there will not be a command
+	 * complete event).
+	 */
+	if (ev->status ||
+	    (hdev->sent_cmd && !bt_cb(hdev->sent_cmd)->hci.req_event))
+		hci_req_cmd_complete(hdev, *opcode, ev->status, req_complete,
+				     req_complete_skb);
+
+	if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
+		bt_dev_err(hdev,
+			   "unexpected event for opcode 0x%4.4x", *opcode);
+		return;
+	}
+
+	if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
+		queue_work(hdev->workqueue, &hdev->cmd_work);
+}
+
+static void hci_hardware_error_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_hardware_error *ev = (void *) skb->data;
+
+	hdev->hw_error_code = ev->code;
+
+	queue_work(hdev->req_workqueue, &hdev->error_reset);
+}
+
+static void hci_role_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_role_change *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
+	if (conn) {
+		if (!ev->status)
+			conn->role = ev->role;
+
+		clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
+
+		hci_role_switch_cfm(conn, ev->status, ev->role);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_num_comp_pkts_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_num_comp_pkts *ev = (void *) skb->data;
+	int i;
+
+	if (hdev->flow_ctl_mode != HCI_FLOW_CTL_MODE_PACKET_BASED) {
+		bt_dev_err(hdev, "wrong event for mode %d", hdev->flow_ctl_mode);
+		return;
+	}
+
+	if (skb->len < sizeof(*ev) ||
+	    skb->len < struct_size(ev, handles, ev->num_hndl)) {
+		BT_DBG("%s bad parameters", hdev->name);
+		return;
+	}
+
+	BT_DBG("%s num_hndl %d", hdev->name, ev->num_hndl);
+
+	for (i = 0; i < ev->num_hndl; i++) {
+		struct hci_comp_pkts_info *info = &ev->handles[i];
+		struct hci_conn *conn;
+		__u16  handle, count;
+
+		handle = __le16_to_cpu(info->handle);
+		count  = __le16_to_cpu(info->count);
+
+		conn = hci_conn_hash_lookup_handle(hdev, handle);
+		if (!conn)
+			continue;
+
+		conn->sent -= count;
+
+		switch (conn->type) {
+		case ACL_LINK:
+			hdev->acl_cnt += count;
+			if (hdev->acl_cnt > hdev->acl_pkts)
+				hdev->acl_cnt = hdev->acl_pkts;
+			break;
+
+		case LE_LINK:
+			if (hdev->le_pkts) {
+				hdev->le_cnt += count;
+				if (hdev->le_cnt > hdev->le_pkts)
+					hdev->le_cnt = hdev->le_pkts;
+			} else {
+				hdev->acl_cnt += count;
+				if (hdev->acl_cnt > hdev->acl_pkts)
+					hdev->acl_cnt = hdev->acl_pkts;
+			}
+			break;
+
+		case SCO_LINK:
+			hdev->sco_cnt += count;
+			if (hdev->sco_cnt > hdev->sco_pkts)
+				hdev->sco_cnt = hdev->sco_pkts;
+			break;
+
+		default:
+			bt_dev_err(hdev, "unknown type %d conn %p",
+				   conn->type, conn);
+			break;
+		}
+	}
+
+	queue_work(hdev->workqueue, &hdev->tx_work);
+}
+
+static struct hci_conn *__hci_conn_lookup_handle(struct hci_dev *hdev,
+						 __u16 handle)
+{
+	struct hci_chan *chan;
+
+	switch (hdev->dev_type) {
+	case HCI_PRIMARY:
+		return hci_conn_hash_lookup_handle(hdev, handle);
+	case HCI_AMP:
+		chan = hci_chan_lookup_handle(hdev, handle);
+		if (chan)
+			return chan->conn;
+		break;
+	default:
+		bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
+		break;
+	}
+
+	return NULL;
+}
+
+static void hci_num_comp_blocks_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_num_comp_blocks *ev = (void *) skb->data;
+	int i;
+
+	if (hdev->flow_ctl_mode != HCI_FLOW_CTL_MODE_BLOCK_BASED) {
+		bt_dev_err(hdev, "wrong event for mode %d", hdev->flow_ctl_mode);
+		return;
+	}
+
+	if (skb->len < sizeof(*ev) ||
+	    skb->len < struct_size(ev, handles, ev->num_hndl)) {
+		BT_DBG("%s bad parameters", hdev->name);
+		return;
+	}
+
+	BT_DBG("%s num_blocks %d num_hndl %d", hdev->name, ev->num_blocks,
+	       ev->num_hndl);
+
+	for (i = 0; i < ev->num_hndl; i++) {
+		struct hci_comp_blocks_info *info = &ev->handles[i];
+		struct hci_conn *conn = NULL;
+		__u16  handle, block_count;
+
+		handle = __le16_to_cpu(info->handle);
+		block_count = __le16_to_cpu(info->blocks);
+
+		conn = __hci_conn_lookup_handle(hdev, handle);
+		if (!conn)
+			continue;
+
+		conn->sent -= block_count;
+
+		switch (conn->type) {
+		case ACL_LINK:
+		case AMP_LINK:
+			hdev->block_cnt += block_count;
+			if (hdev->block_cnt > hdev->num_blocks)
+				hdev->block_cnt = hdev->num_blocks;
+			break;
+
+		default:
+			bt_dev_err(hdev, "unknown type %d conn %p",
+				   conn->type, conn);
+			break;
+		}
+	}
+
+	queue_work(hdev->workqueue, &hdev->tx_work);
+}
+
+static void hci_mode_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_mode_change *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+	if (conn) {
+		conn->mode = ev->mode;
+
+		if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND,
+					&conn->flags)) {
+			if (conn->mode == HCI_CM_ACTIVE)
+				set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
+			else
+				clear_bit(HCI_CONN_POWER_SAVE, &conn->flags);
+		}
+
+		if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
+			hci_sco_setup(conn, ev->status);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_pin_code_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_pin_code_req *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
+	if (!conn)
+		goto unlock;
+
+	if (conn->state == BT_CONNECTED) {
+		hci_conn_hold(conn);
+		conn->disc_timeout = HCI_PAIRING_TIMEOUT;
+		hci_conn_drop(conn);
+	}
+
+	if (!hci_dev_test_flag(hdev, HCI_BONDABLE) &&
+	    !test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags)) {
+		hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY,
+			     sizeof(ev->bdaddr), &ev->bdaddr);
+	} else if (hci_dev_test_flag(hdev, HCI_MGMT)) {
+		u8 secure;
+
+		if (conn->pending_sec_level == BT_SECURITY_HIGH)
+			secure = 1;
+		else
+			secure = 0;
+
+		mgmt_pin_code_request(hdev, &ev->bdaddr, secure);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len)
+{
+	if (key_type == HCI_LK_CHANGED_COMBINATION)
+		return;
+
+	conn->pin_length = pin_len;
+	conn->key_type = key_type;
+
+	switch (key_type) {
+	case HCI_LK_LOCAL_UNIT:
+	case HCI_LK_REMOTE_UNIT:
+	case HCI_LK_DEBUG_COMBINATION:
+		return;
+	case HCI_LK_COMBINATION:
+		if (pin_len == 16)
+			conn->pending_sec_level = BT_SECURITY_HIGH;
+		else
+			conn->pending_sec_level = BT_SECURITY_MEDIUM;
+		break;
+	case HCI_LK_UNAUTH_COMBINATION_P192:
+	case HCI_LK_UNAUTH_COMBINATION_P256:
+		conn->pending_sec_level = BT_SECURITY_MEDIUM;
+		break;
+	case HCI_LK_AUTH_COMBINATION_P192:
+		conn->pending_sec_level = BT_SECURITY_HIGH;
+		break;
+	case HCI_LK_AUTH_COMBINATION_P256:
+		conn->pending_sec_level = BT_SECURITY_FIPS;
+		break;
+	}
+}
+
+static void hci_link_key_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_link_key_req *ev = (void *) skb->data;
+	struct hci_cp_link_key_reply cp;
+	struct hci_conn *conn;
+	struct link_key *key;
+
+	BT_DBG("%s", hdev->name);
+
+	if (!hci_dev_test_flag(hdev, HCI_MGMT))
+		return;
+
+	hci_dev_lock(hdev);
+
+	key = hci_find_link_key(hdev, &ev->bdaddr);
+	if (!key) {
+		BT_DBG("%s link key not found for %pMR", hdev->name,
+		       &ev->bdaddr);
+		goto not_found;
+	}
+
+	BT_DBG("%s found key type %u for %pMR", hdev->name, key->type,
+	       &ev->bdaddr);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
+	if (conn) {
+		clear_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
+
+		if ((key->type == HCI_LK_UNAUTH_COMBINATION_P192 ||
+		     key->type == HCI_LK_UNAUTH_COMBINATION_P256) &&
+		    conn->auth_type != 0xff && (conn->auth_type & 0x01)) {
+			BT_DBG("%s ignoring unauthenticated key", hdev->name);
+			goto not_found;
+		}
+
+		if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 &&
+		    (conn->pending_sec_level == BT_SECURITY_HIGH ||
+		     conn->pending_sec_level == BT_SECURITY_FIPS)) {
+			BT_DBG("%s ignoring key unauthenticated for high security",
+			       hdev->name);
+			goto not_found;
+		}
+
+		conn_set_key(conn, key->type, key->pin_len);
+	}
+
+	bacpy(&cp.bdaddr, &ev->bdaddr);
+	memcpy(cp.link_key, key->val, HCI_LINK_KEY_SIZE);
+
+	hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp);
+
+	hci_dev_unlock(hdev);
+
+	return;
+
+not_found:
+	hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr);
+	hci_dev_unlock(hdev);
+}
+
+static void hci_link_key_notify_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_link_key_notify *ev = (void *) skb->data;
+	struct hci_conn *conn;
+	struct link_key *key;
+	bool persistent;
+	u8 pin_len = 0;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
+	if (!conn)
+		goto unlock;
+
+	/* Ignore NULL link key against CVE-2020-26555 */
+	if (!crypto_memneq(ev->link_key, ZERO_KEY, HCI_LINK_KEY_SIZE)) {
+		bt_dev_dbg(hdev, "Ignore NULL link key (ZERO KEY) for %pMR",
+			   &ev->bdaddr);
+		hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
+		hci_conn_drop(conn);
+		goto unlock;
+	}
+
+	hci_conn_hold(conn);
+	conn->disc_timeout = HCI_DISCONN_TIMEOUT;
+	hci_conn_drop(conn);
+
+	set_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
+	conn_set_key(conn, ev->key_type, conn->pin_length);
+
+	if (!hci_dev_test_flag(hdev, HCI_MGMT))
+		goto unlock;
+
+	key = hci_add_link_key(hdev, conn, &ev->bdaddr, ev->link_key,
+			        ev->key_type, pin_len, &persistent);
+	if (!key)
+		goto unlock;
+
+	/* Update connection information since adding the key will have
+	 * fixed up the type in the case of changed combination keys.
+	 */
+	if (ev->key_type == HCI_LK_CHANGED_COMBINATION)
+		conn_set_key(conn, key->type, key->pin_len);
+
+	mgmt_new_link_key(hdev, key, persistent);
+
+	/* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag
+	 * is set. If it's not set simply remove the key from the kernel
+	 * list (we've still notified user space about it but with
+	 * store_hint being 0).
+	 */
+	if (key->type == HCI_LK_DEBUG_COMBINATION &&
+	    !hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS)) {
+		list_del_rcu(&key->list);
+		kfree_rcu(key, rcu);
+		goto unlock;
+	}
+
+	if (persistent)
+		clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
+	else
+		set_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_clock_offset_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_clock_offset *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+	if (conn && !ev->status) {
+		struct inquiry_entry *ie;
+
+		ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
+		if (ie) {
+			ie->data.clock_offset = ev->clock_offset;
+			ie->timestamp = jiffies;
+		}
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_pkt_type_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_pkt_type_change *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+	if (conn && !ev->status)
+		conn->pkt_type = __le16_to_cpu(ev->pkt_type);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_pscan_rep_mode *ev = (void *) skb->data;
+	struct inquiry_entry *ie;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
+	if (ie) {
+		ie->data.pscan_rep_mode = ev->pscan_rep_mode;
+		ie->timestamp = jiffies;
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev,
+					     struct sk_buff *skb)
+{
+	struct inquiry_data data;
+	int num_rsp = *((__u8 *) skb->data);
+
+	BT_DBG("%s num_rsp %d", hdev->name, num_rsp);
+
+	if (!num_rsp)
+		return;
+
+	if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
+		return;
+
+	hci_dev_lock(hdev);
+
+	if ((skb->len - 1) / num_rsp != sizeof(struct inquiry_info_with_rssi)) {
+		struct inquiry_info_with_rssi_and_pscan_mode *info;
+		info = (void *) (skb->data + 1);
+
+		if (skb->len < num_rsp * sizeof(*info) + 1)
+			goto unlock;
+
+		for (; num_rsp; num_rsp--, info++) {
+			u32 flags;
+
+			bacpy(&data.bdaddr, &info->bdaddr);
+			data.pscan_rep_mode	= info->pscan_rep_mode;
+			data.pscan_period_mode	= info->pscan_period_mode;
+			data.pscan_mode		= info->pscan_mode;
+			memcpy(data.dev_class, info->dev_class, 3);
+			data.clock_offset	= info->clock_offset;
+			data.rssi		= info->rssi;
+			data.ssp_mode		= 0x00;
+
+			flags = hci_inquiry_cache_update(hdev, &data, false);
+
+			mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
+					  info->dev_class, info->rssi,
+					  flags, NULL, 0, NULL, 0);
+		}
+	} else {
+		struct inquiry_info_with_rssi *info = (void *) (skb->data + 1);
+
+		if (skb->len < num_rsp * sizeof(*info) + 1)
+			goto unlock;
+
+		for (; num_rsp; num_rsp--, info++) {
+			u32 flags;
+
+			bacpy(&data.bdaddr, &info->bdaddr);
+			data.pscan_rep_mode	= info->pscan_rep_mode;
+			data.pscan_period_mode	= info->pscan_period_mode;
+			data.pscan_mode		= 0x00;
+			memcpy(data.dev_class, info->dev_class, 3);
+			data.clock_offset	= info->clock_offset;
+			data.rssi		= info->rssi;
+			data.ssp_mode		= 0x00;
+
+			flags = hci_inquiry_cache_update(hdev, &data, false);
+
+			mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
+					  info->dev_class, info->rssi,
+					  flags, NULL, 0, NULL, 0);
+		}
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_remote_ext_features_evt(struct hci_dev *hdev,
+					struct sk_buff *skb)
+{
+	struct hci_ev_remote_ext_features *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+	if (!conn)
+		goto unlock;
+
+	if (ev->page < HCI_MAX_PAGES)
+		memcpy(conn->features[ev->page], ev->features, 8);
+
+	if (!ev->status && ev->page == 0x01) {
+		struct inquiry_entry *ie;
+
+		ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
+		if (ie)
+			ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
+
+		if (ev->features[0] & LMP_HOST_SSP) {
+			set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
+		} else {
+			/* It is mandatory by the Bluetooth specification that
+			 * Extended Inquiry Results are only used when Secure
+			 * Simple Pairing is enabled, but some devices violate
+			 * this.
+			 *
+			 * To make these devices work, the internal SSP
+			 * enabled flag needs to be cleared if the remote host
+			 * features do not indicate SSP support */
+			clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
+		}
+
+		if (ev->features[0] & LMP_HOST_SC)
+			set_bit(HCI_CONN_SC_ENABLED, &conn->flags);
+	}
+
+	if (conn->state != BT_CONFIG)
+		goto unlock;
+
+	if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
+		struct hci_cp_remote_name_req cp;
+		memset(&cp, 0, sizeof(cp));
+		bacpy(&cp.bdaddr, &conn->dst);
+		cp.pscan_rep_mode = 0x02;
+		hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
+	} else if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
+		mgmt_device_connected(hdev, conn, 0, NULL, 0);
+
+	if (!hci_outgoing_auth_needed(hdev, conn)) {
+		conn->state = BT_CONNECTED;
+		hci_connect_cfm(conn, ev->status);
+		hci_conn_drop(conn);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_sync_conn_complete_evt(struct hci_dev *hdev,
+				       struct sk_buff *skb)
+{
+	struct hci_ev_sync_conn_complete *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	switch (ev->link_type) {
+	case SCO_LINK:
+	case ESCO_LINK:
+		break;
+	default:
+		/* As per Core 5.3 Vol 4 Part E 7.7.35 (p.2219), Link_Type
+		 * for HCI_Synchronous_Connection_Complete is limited to
+		 * either SCO or eSCO
+		 */
+		bt_dev_err(hdev, "Ignoring connect complete event for invalid link type");
+		return;
+	}
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
+	if (!conn) {
+		if (ev->link_type == ESCO_LINK)
+			goto unlock;
+
+		/* When the link type in the event indicates SCO connection
+		 * and lookup of the connection object fails, then check
+		 * if an eSCO connection object exists.
+		 *
+		 * The core limits the synchronous connections to either
+		 * SCO or eSCO. The eSCO connection is preferred and tried
+		 * to be setup first and until successfully established,
+		 * the link type will be hinted as eSCO.
+		 */
+		conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr);
+		if (!conn)
+			goto unlock;
+	}
+
+	switch (ev->status) {
+	case 0x00:
+		/* The synchronous connection complete event should only be
+		 * sent once per new connection. Receiving a successful
+		 * complete event when the connection status is already
+		 * BT_CONNECTED means that the device is misbehaving and sent
+		 * multiple complete event packets for the same new connection.
+		 *
+		 * Registering the device more than once can corrupt kernel
+		 * memory, hence upon detecting this invalid event, we report
+		 * an error and ignore the packet.
+		 */
+		if (conn->state == BT_CONNECTED) {
+			bt_dev_err(hdev, "Ignoring connect complete event for existing connection");
+			goto unlock;
+		}
+
+		conn->handle = __le16_to_cpu(ev->handle);
+		conn->state  = BT_CONNECTED;
+		conn->type   = ev->link_type;
+
+		hci_debugfs_create_conn(conn);
+		hci_conn_add_sysfs(conn);
+		break;
+
+	case 0x10:	/* Connection Accept Timeout */
+	case 0x0d:	/* Connection Rejected due to Limited Resources */
+	case 0x11:	/* Unsupported Feature or Parameter Value */
+	case 0x1c:	/* SCO interval rejected */
+	case 0x1a:	/* Unsupported Remote Feature */
+	case 0x1e:	/* Invalid LMP Parameters */
+	case 0x1f:	/* Unspecified error */
+	case 0x20:	/* Unsupported LMP Parameter value */
+		if (conn->out) {
+			conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
+					(hdev->esco_type & EDR_ESCO_MASK);
+			if (hci_setup_sync(conn, conn->link->handle))
+				goto unlock;
+		}
+		fallthrough;
+
+	default:
+		conn->state = BT_CLOSED;
+		break;
+	}
+
+	bt_dev_dbg(hdev, "SCO connected with air mode: %02x", ev->air_mode);
+
+	switch (ev->air_mode) {
+	case 0x02:
+		if (hdev->notify)
+			hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
+		break;
+	case 0x03:
+		if (hdev->notify)
+			hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_TRANSP);
+		break;
+	}
+
+	hci_connect_cfm(conn, ev->status);
+	if (ev->status)
+		hci_conn_del(conn);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static inline size_t eir_get_length(u8 *eir, size_t eir_len)
+{
+	size_t parsed = 0;
+
+	while (parsed < eir_len) {
+		u8 field_len = eir[0];
+
+		if (field_len == 0)
+			return parsed;
+
+		parsed += field_len + 1;
+		eir += field_len + 1;
+	}
+
+	return eir_len;
+}
+
+static void hci_extended_inquiry_result_evt(struct hci_dev *hdev,
+					    struct sk_buff *skb)
+{
+	struct inquiry_data data;
+	struct extended_inquiry_info *info = (void *) (skb->data + 1);
+	int num_rsp = *((__u8 *) skb->data);
+	size_t eir_len;
+
+	BT_DBG("%s num_rsp %d", hdev->name, num_rsp);
+
+	if (!num_rsp || skb->len < num_rsp * sizeof(*info) + 1)
+		return;
+
+	if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
+		return;
+
+	hci_dev_lock(hdev);
+
+	for (; num_rsp; num_rsp--, info++) {
+		u32 flags;
+		bool name_known;
+
+		bacpy(&data.bdaddr, &info->bdaddr);
+		data.pscan_rep_mode	= info->pscan_rep_mode;
+		data.pscan_period_mode	= info->pscan_period_mode;
+		data.pscan_mode		= 0x00;
+		memcpy(data.dev_class, info->dev_class, 3);
+		data.clock_offset	= info->clock_offset;
+		data.rssi		= info->rssi;
+		data.ssp_mode		= 0x01;
+
+		if (hci_dev_test_flag(hdev, HCI_MGMT))
+			name_known = eir_get_data(info->data,
+						  sizeof(info->data),
+						  EIR_NAME_COMPLETE, NULL);
+		else
+			name_known = true;
+
+		flags = hci_inquiry_cache_update(hdev, &data, name_known);
+
+		eir_len = eir_get_length(info->data, sizeof(info->data));
+
+		mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
+				  info->dev_class, info->rssi,
+				  flags, info->data, eir_len, NULL, 0);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_key_refresh_complete_evt(struct hci_dev *hdev,
+					 struct sk_buff *skb)
+{
+	struct hci_ev_key_refresh_complete *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x handle 0x%4.4x", hdev->name, ev->status,
+	       __le16_to_cpu(ev->handle));
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+	if (!conn)
+		goto unlock;
+
+	/* For BR/EDR the necessary steps are taken through the
+	 * auth_complete event.
+	 */
+	if (conn->type != LE_LINK)
+		goto unlock;
+
+	if (!ev->status)
+		conn->sec_level = conn->pending_sec_level;
+
+	clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
+
+	if (ev->status && conn->state == BT_CONNECTED) {
+		hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
+		hci_conn_drop(conn);
+		goto unlock;
+	}
+
+	if (conn->state == BT_CONFIG) {
+		if (!ev->status)
+			conn->state = BT_CONNECTED;
+
+		hci_connect_cfm(conn, ev->status);
+		hci_conn_drop(conn);
+	} else {
+		hci_auth_cfm(conn, ev->status);
+
+		hci_conn_hold(conn);
+		conn->disc_timeout = HCI_DISCONN_TIMEOUT;
+		hci_conn_drop(conn);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static u8 hci_get_auth_req(struct hci_conn *conn)
+{
+	/* If remote requests no-bonding follow that lead */
+	if (conn->remote_auth == HCI_AT_NO_BONDING ||
+	    conn->remote_auth == HCI_AT_NO_BONDING_MITM)
+		return conn->remote_auth | (conn->auth_type & 0x01);
+
+	/* If both remote and local have enough IO capabilities, require
+	 * MITM protection
+	 */
+	if (conn->remote_cap != HCI_IO_NO_INPUT_OUTPUT &&
+	    conn->io_capability != HCI_IO_NO_INPUT_OUTPUT)
+		return conn->remote_auth | 0x01;
+
+	/* No MITM protection possible so ignore remote requirement */
+	return (conn->remote_auth & ~0x01) | (conn->auth_type & 0x01);
+}
+
+static u8 bredr_oob_data_present(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct oob_data *data;
+
+	data = hci_find_remote_oob_data(hdev, &conn->dst, BDADDR_BREDR);
+	if (!data)
+		return 0x00;
+
+	if (bredr_sc_enabled(hdev)) {
+		/* When Secure Connections is enabled, then just
+		 * return the present value stored with the OOB
+		 * data. The stored value contains the right present
+		 * information. However it can only be trusted when
+		 * not in Secure Connection Only mode.
+		 */
+		if (!hci_dev_test_flag(hdev, HCI_SC_ONLY))
+			return data->present;
+
+		/* When Secure Connections Only mode is enabled, then
+		 * the P-256 values are required. If they are not
+		 * available, then do not declare that OOB data is
+		 * present.
+		 */
+		if (!crypto_memneq(data->rand256, ZERO_KEY, 16) ||
+		    !crypto_memneq(data->hash256, ZERO_KEY, 16))
+			return 0x00;
+
+		return 0x02;
+	}
+
+	/* When Secure Connections is not enabled or actually
+	 * not supported by the hardware, then check that if
+	 * P-192 data values are present.
+	 */
+	if (!crypto_memneq(data->rand192, ZERO_KEY, 16) ||
+	    !crypto_memneq(data->hash192, ZERO_KEY, 16))
+		return 0x00;
+
+	return 0x01;
+}
+
+static void hci_io_capa_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_io_capa_request *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
+	if (!conn || !hci_conn_ssp_enabled(conn))
+		goto unlock;
+
+	hci_conn_hold(conn);
+
+	if (!hci_dev_test_flag(hdev, HCI_MGMT))
+		goto unlock;
+
+	/* Allow pairing if we're pairable, the initiators of the
+	 * pairing or if the remote is not requesting bonding.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_BONDABLE) ||
+	    test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) ||
+	    (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) {
+		struct hci_cp_io_capability_reply cp;
+
+		bacpy(&cp.bdaddr, &ev->bdaddr);
+		/* Change the IO capability from KeyboardDisplay
+		 * to DisplayYesNo as it is not supported by BT spec. */
+		cp.capability = (conn->io_capability == 0x04) ?
+				HCI_IO_DISPLAY_YESNO : conn->io_capability;
+
+		/* If we are initiators, there is no remote information yet */
+		if (conn->remote_auth == 0xff) {
+			/* Request MITM protection if our IO caps allow it
+			 * except for the no-bonding case.
+			 */
+			if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
+			    conn->auth_type != HCI_AT_NO_BONDING)
+				conn->auth_type |= 0x01;
+		} else {
+			conn->auth_type = hci_get_auth_req(conn);
+		}
+
+		/* If we're not bondable, force one of the non-bondable
+		 * authentication requirement values.
+		 */
+		if (!hci_dev_test_flag(hdev, HCI_BONDABLE))
+			conn->auth_type &= HCI_AT_NO_BONDING_MITM;
+
+		cp.authentication = conn->auth_type;
+		cp.oob_data = bredr_oob_data_present(conn);
+
+		hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY,
+			     sizeof(cp), &cp);
+	} else {
+		struct hci_cp_io_capability_neg_reply cp;
+
+		bacpy(&cp.bdaddr, &ev->bdaddr);
+		cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED;
+
+		hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY,
+			     sizeof(cp), &cp);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_io_capa_reply_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_io_capa_reply *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
+	if (!conn)
+		goto unlock;
+
+	conn->remote_cap = ev->capability;
+	conn->remote_auth = ev->authentication;
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_user_confirm_request_evt(struct hci_dev *hdev,
+					 struct sk_buff *skb)
+{
+	struct hci_ev_user_confirm_req *ev = (void *) skb->data;
+	int loc_mitm, rem_mitm, confirm_hint = 0;
+	struct hci_conn *conn;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	if (!hci_dev_test_flag(hdev, HCI_MGMT))
+		goto unlock;
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
+	if (!conn)
+		goto unlock;
+
+	loc_mitm = (conn->auth_type & 0x01);
+	rem_mitm = (conn->remote_auth & 0x01);
+
+	/* If we require MITM but the remote device can't provide that
+	 * (it has NoInputNoOutput) then reject the confirmation
+	 * request. We check the security level here since it doesn't
+	 * necessarily match conn->auth_type.
+	 */
+	if (conn->pending_sec_level > BT_SECURITY_MEDIUM &&
+	    conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) {
+		BT_DBG("Rejecting request: remote device can't provide MITM");
+		hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY,
+			     sizeof(ev->bdaddr), &ev->bdaddr);
+		goto unlock;
+	}
+
+	/* If no side requires MITM protection; auto-accept */
+	if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) &&
+	    (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) {
+
+		/* If we're not the initiators request authorization to
+		 * proceed from user space (mgmt_user_confirm with
+		 * confirm_hint set to 1). The exception is if neither
+		 * side had MITM or if the local IO capability is
+		 * NoInputNoOutput, in which case we do auto-accept
+		 */
+		if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) &&
+		    conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
+		    (loc_mitm || rem_mitm)) {
+			BT_DBG("Confirming auto-accept as acceptor");
+			confirm_hint = 1;
+			goto confirm;
+		}
+
+		/* If there already exists link key in local host, leave the
+		 * decision to user space since the remote device could be
+		 * legitimate or malicious.
+		 */
+		if (hci_find_link_key(hdev, &ev->bdaddr)) {
+			bt_dev_dbg(hdev, "Local host already has link key");
+			confirm_hint = 1;
+			goto confirm;
+		}
+
+		BT_DBG("Auto-accept of user confirmation with %ums delay",
+		       hdev->auto_accept_delay);
+
+		if (hdev->auto_accept_delay > 0) {
+			int delay = msecs_to_jiffies(hdev->auto_accept_delay);
+			queue_delayed_work(conn->hdev->workqueue,
+					   &conn->auto_accept_work, delay);
+			goto unlock;
+		}
+
+		hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY,
+			     sizeof(ev->bdaddr), &ev->bdaddr);
+		goto unlock;
+	}
+
+confirm:
+	mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0,
+				  le32_to_cpu(ev->passkey), confirm_hint);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_user_passkey_request_evt(struct hci_dev *hdev,
+					 struct sk_buff *skb)
+{
+	struct hci_ev_user_passkey_req *ev = (void *) skb->data;
+
+	BT_DBG("%s", hdev->name);
+
+	if (hci_dev_test_flag(hdev, HCI_MGMT))
+		mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0);
+}
+
+static void hci_user_passkey_notify_evt(struct hci_dev *hdev,
+					struct sk_buff *skb)
+{
+	struct hci_ev_user_passkey_notify *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s", hdev->name);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
+	if (!conn)
+		return;
+
+	conn->passkey_notify = __le32_to_cpu(ev->passkey);
+	conn->passkey_entered = 0;
+
+	if (hci_dev_test_flag(hdev, HCI_MGMT))
+		mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
+					 conn->dst_type, conn->passkey_notify,
+					 conn->passkey_entered);
+}
+
+static void hci_keypress_notify_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_keypress_notify *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s", hdev->name);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
+	if (!conn)
+		return;
+
+	switch (ev->type) {
+	case HCI_KEYPRESS_STARTED:
+		conn->passkey_entered = 0;
+		return;
+
+	case HCI_KEYPRESS_ENTERED:
+		conn->passkey_entered++;
+		break;
+
+	case HCI_KEYPRESS_ERASED:
+		conn->passkey_entered--;
+		break;
+
+	case HCI_KEYPRESS_CLEARED:
+		conn->passkey_entered = 0;
+		break;
+
+	case HCI_KEYPRESS_COMPLETED:
+		return;
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_MGMT))
+		mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
+					 conn->dst_type, conn->passkey_notify,
+					 conn->passkey_entered);
+}
+
+static void hci_simple_pair_complete_evt(struct hci_dev *hdev,
+					 struct sk_buff *skb)
+{
+	struct hci_ev_simple_pair_complete *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
+	if (!conn || !hci_conn_ssp_enabled(conn))
+		goto unlock;
+
+	/* Reset the authentication requirement to unknown */
+	conn->remote_auth = 0xff;
+
+	/* To avoid duplicate auth_failed events to user space we check
+	 * the HCI_CONN_AUTH_PEND flag which will be set if we
+	 * initiated the authentication. A traditional auth_complete
+	 * event gets always produced as initiator and is also mapped to
+	 * the mgmt_auth_failed event */
+	if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status)
+		mgmt_auth_failed(conn, ev->status);
+
+	hci_conn_drop(conn);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_remote_host_features_evt(struct hci_dev *hdev,
+					 struct sk_buff *skb)
+{
+	struct hci_ev_remote_host_features *ev = (void *) skb->data;
+	struct inquiry_entry *ie;
+	struct hci_conn *conn;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
+	if (conn)
+		memcpy(conn->features[1], ev->features, 8);
+
+	ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
+	if (ie)
+		ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_remote_oob_data_request_evt(struct hci_dev *hdev,
+					    struct sk_buff *skb)
+{
+	struct hci_ev_remote_oob_data_request *ev = (void *) skb->data;
+	struct oob_data *data;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	if (!hci_dev_test_flag(hdev, HCI_MGMT))
+		goto unlock;
+
+	data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR);
+	if (!data) {
+		struct hci_cp_remote_oob_data_neg_reply cp;
+
+		bacpy(&cp.bdaddr, &ev->bdaddr);
+		hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY,
+			     sizeof(cp), &cp);
+		goto unlock;
+	}
+
+	if (bredr_sc_enabled(hdev)) {
+		struct hci_cp_remote_oob_ext_data_reply cp;
+
+		bacpy(&cp.bdaddr, &ev->bdaddr);
+		if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
+			memset(cp.hash192, 0, sizeof(cp.hash192));
+			memset(cp.rand192, 0, sizeof(cp.rand192));
+		} else {
+			memcpy(cp.hash192, data->hash192, sizeof(cp.hash192));
+			memcpy(cp.rand192, data->rand192, sizeof(cp.rand192));
+		}
+		memcpy(cp.hash256, data->hash256, sizeof(cp.hash256));
+		memcpy(cp.rand256, data->rand256, sizeof(cp.rand256));
+
+		hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY,
+			     sizeof(cp), &cp);
+	} else {
+		struct hci_cp_remote_oob_data_reply cp;
+
+		bacpy(&cp.bdaddr, &ev->bdaddr);
+		memcpy(cp.hash, data->hash192, sizeof(cp.hash));
+		memcpy(cp.rand, data->rand192, sizeof(cp.rand));
+
+		hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY,
+			     sizeof(cp), &cp);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+#if IS_ENABLED(CONFIG_BT_HS)
+static void hci_chan_selected_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_channel_selected *ev = (void *)skb->data;
+	struct hci_conn *hcon;
+
+	BT_DBG("%s handle 0x%2.2x", hdev->name, ev->phy_handle);
+
+	skb_pull(skb, sizeof(*ev));
+
+	hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
+	if (!hcon)
+		return;
+
+	amp_read_loc_assoc_final_data(hdev, hcon);
+}
+
+static void hci_phy_link_complete_evt(struct hci_dev *hdev,
+				      struct sk_buff *skb)
+{
+	struct hci_ev_phy_link_complete *ev = (void *) skb->data;
+	struct hci_conn *hcon, *bredr_hcon;
+
+	BT_DBG("%s handle 0x%2.2x status 0x%2.2x", hdev->name, ev->phy_handle,
+	       ev->status);
+
+	hci_dev_lock(hdev);
+
+	hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
+	if (!hcon) {
+		hci_dev_unlock(hdev);
+		return;
+	}
+
+	if (!hcon->amp_mgr) {
+		hci_dev_unlock(hdev);
+		return;
+	}
+
+	if (ev->status) {
+		hci_conn_del(hcon);
+		hci_dev_unlock(hdev);
+		return;
+	}
+
+	bredr_hcon = hcon->amp_mgr->l2cap_conn->hcon;
+
+	hcon->state = BT_CONNECTED;
+	bacpy(&hcon->dst, &bredr_hcon->dst);
+
+	hci_conn_hold(hcon);
+	hcon->disc_timeout = HCI_DISCONN_TIMEOUT;
+	hci_conn_drop(hcon);
+
+	hci_debugfs_create_conn(hcon);
+	hci_conn_add_sysfs(hcon);
+
+	amp_physical_cfm(bredr_hcon, hcon);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_loglink_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_logical_link_complete *ev = (void *) skb->data;
+	struct hci_conn *hcon;
+	struct hci_chan *hchan;
+	struct amp_mgr *mgr;
+
+	BT_DBG("%s log_handle 0x%4.4x phy_handle 0x%2.2x status 0x%2.2x",
+	       hdev->name, le16_to_cpu(ev->handle), ev->phy_handle,
+	       ev->status);
+
+	hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
+	if (!hcon)
+		return;
+
+	/* Create AMP hchan */
+	hchan = hci_chan_create(hcon);
+	if (!hchan)
+		return;
+
+	hchan->handle = le16_to_cpu(ev->handle);
+	hchan->amp = true;
+
+	BT_DBG("hcon %p mgr %p hchan %p", hcon, hcon->amp_mgr, hchan);
+
+	mgr = hcon->amp_mgr;
+	if (mgr && mgr->bredr_chan) {
+		struct l2cap_chan *bredr_chan = mgr->bredr_chan;
+
+		l2cap_chan_lock(bredr_chan);
+
+		bredr_chan->conn->mtu = hdev->block_mtu;
+		l2cap_logical_cfm(bredr_chan, hchan, 0);
+		hci_conn_hold(hcon);
+
+		l2cap_chan_unlock(bredr_chan);
+	}
+}
+
+static void hci_disconn_loglink_complete_evt(struct hci_dev *hdev,
+					     struct sk_buff *skb)
+{
+	struct hci_ev_disconn_logical_link_complete *ev = (void *) skb->data;
+	struct hci_chan *hchan;
+
+	BT_DBG("%s log handle 0x%4.4x status 0x%2.2x", hdev->name,
+	       le16_to_cpu(ev->handle), ev->status);
+
+	if (ev->status)
+		return;
+
+	hci_dev_lock(hdev);
+
+	hchan = hci_chan_lookup_handle(hdev, le16_to_cpu(ev->handle));
+	if (!hchan || !hchan->amp)
+		goto unlock;
+
+	amp_destroy_logical_link(hchan, ev->reason);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_disconn_phylink_complete_evt(struct hci_dev *hdev,
+					     struct sk_buff *skb)
+{
+	struct hci_ev_disconn_phy_link_complete *ev = (void *) skb->data;
+	struct hci_conn *hcon;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	if (ev->status)
+		return;
+
+	hci_dev_lock(hdev);
+
+	hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
+	if (hcon && hcon->type == AMP_LINK) {
+		hcon->state = BT_CLOSED;
+		hci_disconn_cfm(hcon, ev->reason);
+		hci_conn_del(hcon);
+	}
+
+	hci_dev_unlock(hdev);
+}
+#endif
+
+static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr,
+				u8 bdaddr_type, bdaddr_t *local_rpa)
+{
+	if (conn->out) {
+		conn->dst_type = bdaddr_type;
+		conn->resp_addr_type = bdaddr_type;
+		bacpy(&conn->resp_addr, bdaddr);
+
+		/* Check if the controller has set a Local RPA then it must be
+		 * used instead or hdev->rpa.
+		 */
+		if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
+			conn->init_addr_type = ADDR_LE_DEV_RANDOM;
+			bacpy(&conn->init_addr, local_rpa);
+		} else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) {
+			conn->init_addr_type = ADDR_LE_DEV_RANDOM;
+			bacpy(&conn->init_addr, &conn->hdev->rpa);
+		} else {
+			hci_copy_identity_address(conn->hdev, &conn->init_addr,
+						  &conn->init_addr_type);
+		}
+	} else {
+		conn->resp_addr_type = conn->hdev->adv_addr_type;
+		/* Check if the controller has set a Local RPA then it must be
+		 * used instead or hdev->rpa.
+		 */
+		if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
+			conn->resp_addr_type = ADDR_LE_DEV_RANDOM;
+			bacpy(&conn->resp_addr, local_rpa);
+		} else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) {
+			/* In case of ext adv, resp_addr will be updated in
+			 * Adv Terminated event.
+			 */
+			if (!ext_adv_capable(conn->hdev))
+				bacpy(&conn->resp_addr,
+				      &conn->hdev->random_addr);
+		} else {
+			bacpy(&conn->resp_addr, &conn->hdev->bdaddr);
+		}
+
+		conn->init_addr_type = bdaddr_type;
+		bacpy(&conn->init_addr, bdaddr);
+
+		/* For incoming connections, set the default minimum
+		 * and maximum connection interval. They will be used
+		 * to check if the parameters are in range and if not
+		 * trigger the connection update procedure.
+		 */
+		conn->le_conn_min_interval = conn->hdev->le_conn_min_interval;
+		conn->le_conn_max_interval = conn->hdev->le_conn_max_interval;
+	}
+}
+
+static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
+				 bdaddr_t *bdaddr, u8 bdaddr_type,
+				 bdaddr_t *local_rpa, u8 role, u16 handle,
+				 u16 interval, u16 latency,
+				 u16 supervision_timeout)
+{
+	struct hci_conn_params *params;
+	struct hci_conn *conn;
+	struct smp_irk *irk;
+	u8 addr_type;
+
+	hci_dev_lock(hdev);
+
+	/* All controllers implicitly stop advertising in the event of a
+	 * connection, so ensure that the state bit is cleared.
+	 */
+	hci_dev_clear_flag(hdev, HCI_LE_ADV);
+
+	conn = hci_lookup_le_connect(hdev);
+	if (!conn) {
+		conn = hci_conn_add(hdev, LE_LINK, bdaddr, role);
+		if (!conn) {
+			bt_dev_err(hdev, "no memory for new connection");
+			goto unlock;
+		}
+
+		conn->dst_type = bdaddr_type;
+
+		/* If we didn't have a hci_conn object previously
+		 * but we're in central role this must be something
+		 * initiated using an accept list. Since accept list based
+		 * connections are not "first class citizens" we don't
+		 * have full tracking of them. Therefore, we go ahead
+		 * with a "best effort" approach of determining the
+		 * initiator address based on the HCI_PRIVACY flag.
+		 */
+		if (conn->out) {
+			conn->resp_addr_type = bdaddr_type;
+			bacpy(&conn->resp_addr, bdaddr);
+			if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
+				conn->init_addr_type = ADDR_LE_DEV_RANDOM;
+				bacpy(&conn->init_addr, &hdev->rpa);
+			} else {
+				hci_copy_identity_address(hdev,
+							  &conn->init_addr,
+							  &conn->init_addr_type);
+			}
+		}
+	} else {
+		cancel_delayed_work(&conn->le_conn_timeout);
+	}
+
+	le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa);
+
+	/* Lookup the identity address from the stored connection
+	 * address and address type.
+	 *
+	 * When establishing connections to an identity address, the
+	 * connection procedure will store the resolvable random
+	 * address first. Now if it can be converted back into the
+	 * identity address, start using the identity address from
+	 * now on.
+	 */
+	irk = hci_get_irk(hdev, &conn->dst, conn->dst_type);
+	if (irk) {
+		bacpy(&conn->dst, &irk->bdaddr);
+		conn->dst_type = irk->addr_type;
+	}
+
+	if (status) {
+		hci_le_conn_failed(conn, status);
+		goto unlock;
+	}
+
+	if (conn->dst_type == ADDR_LE_DEV_PUBLIC)
+		addr_type = BDADDR_LE_PUBLIC;
+	else
+		addr_type = BDADDR_LE_RANDOM;
+
+	/* Drop the connection if the device is blocked */
+	if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) {
+		hci_conn_drop(conn);
+		goto unlock;
+	}
+
+	if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
+		mgmt_device_connected(hdev, conn, 0, NULL, 0);
+
+	conn->sec_level = BT_SECURITY_LOW;
+	conn->handle = handle;
+	conn->state = BT_CONFIG;
+
+	conn->le_conn_interval = interval;
+	conn->le_conn_latency = latency;
+	conn->le_supv_timeout = supervision_timeout;
+
+	hci_debugfs_create_conn(conn);
+	hci_conn_add_sysfs(conn);
+
+	/* The remote features procedure is defined for master
+	 * role only. So only in case of an initiated connection
+	 * request the remote features.
+	 *
+	 * If the local controller supports slave-initiated features
+	 * exchange, then requesting the remote features in slave
+	 * role is possible. Otherwise just transition into the
+	 * connected state without requesting the remote features.
+	 */
+	if (conn->out ||
+	    (hdev->le_features[0] & HCI_LE_SLAVE_FEATURES)) {
+		struct hci_cp_le_read_remote_features cp;
+
+		cp.handle = __cpu_to_le16(conn->handle);
+
+		hci_send_cmd(hdev, HCI_OP_LE_READ_REMOTE_FEATURES,
+			     sizeof(cp), &cp);
+
+		hci_conn_hold(conn);
+	} else {
+		conn->state = BT_CONNECTED;
+		hci_connect_cfm(conn, status);
+	}
+
+	params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
+					   conn->dst_type);
+	if (params) {
+		list_del_init(&params->action);
+		if (params->conn) {
+			hci_conn_drop(params->conn);
+			hci_conn_put(params->conn);
+			params->conn = NULL;
+		}
+	}
+
+unlock:
+	hci_update_background_scan(hdev);
+	hci_dev_unlock(hdev);
+}
+
+static void hci_le_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_le_conn_complete *ev = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
+			     NULL, ev->role, le16_to_cpu(ev->handle),
+			     le16_to_cpu(ev->interval),
+			     le16_to_cpu(ev->latency),
+			     le16_to_cpu(ev->supervision_timeout));
+}
+
+static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev,
+					 struct sk_buff *skb)
+{
+	struct hci_ev_le_enh_conn_complete *ev = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
+			     &ev->local_rpa, ev->role, le16_to_cpu(ev->handle),
+			     le16_to_cpu(ev->interval),
+			     le16_to_cpu(ev->latency),
+			     le16_to_cpu(ev->supervision_timeout));
+
+	if (use_ll_privacy(hdev) &&
+	    hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY) &&
+	    hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
+		hci_req_disable_address_resolution(hdev);
+}
+
+static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_evt_le_ext_adv_set_term *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	if (ev->status) {
+		struct adv_info *adv;
+
+		adv = hci_find_adv_instance(hdev, ev->handle);
+		if (!adv)
+			return;
+
+		/* Remove advertising as it has been terminated */
+		hci_remove_adv_instance(hdev, ev->handle);
+		mgmt_advertising_removed(NULL, hdev, ev->handle);
+
+		return;
+	}
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle));
+	if (conn) {
+		struct adv_info *adv_instance;
+
+		if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM ||
+		    bacmp(&conn->resp_addr, BDADDR_ANY))
+			return;
+
+		if (!hdev->cur_adv_instance) {
+			bacpy(&conn->resp_addr, &hdev->random_addr);
+			return;
+		}
+
+		adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
+		if (adv_instance)
+			bacpy(&conn->resp_addr, &adv_instance->random_addr);
+	}
+}
+
+static void hci_le_conn_update_complete_evt(struct hci_dev *hdev,
+					    struct sk_buff *skb)
+{
+	struct hci_ev_le_conn_update_complete *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	if (ev->status)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+	if (conn) {
+		conn->le_conn_interval = le16_to_cpu(ev->interval);
+		conn->le_conn_latency = le16_to_cpu(ev->latency);
+		conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+/* This function requires the caller holds hdev->lock */
+static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev,
+					      bdaddr_t *addr,
+					      u8 addr_type, u8 adv_type,
+					      bdaddr_t *direct_rpa)
+{
+	struct hci_conn *conn;
+	struct hci_conn_params *params;
+
+	/* If the event is not connectable don't proceed further */
+	if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND)
+		return NULL;
+
+	/* Ignore if the device is blocked */
+	if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type))
+		return NULL;
+
+	/* Most controller will fail if we try to create new connections
+	 * while we have an existing one in slave role.
+	 */
+	if (hdev->conn_hash.le_num_slave > 0 &&
+	    (!test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) ||
+	     !(hdev->le_states[3] & 0x10)))
+		return NULL;
+
+	/* If we're not connectable only connect devices that we have in
+	 * our pend_le_conns list.
+	 */
+	params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr,
+					   addr_type);
+	if (!params)
+		return NULL;
+
+	if (!params->explicit_connect) {
+		switch (params->auto_connect) {
+		case HCI_AUTO_CONN_DIRECT:
+			/* Only devices advertising with ADV_DIRECT_IND are
+			 * triggering a connection attempt. This is allowing
+			 * incoming connections from slave devices.
+			 */
+			if (adv_type != LE_ADV_DIRECT_IND)
+				return NULL;
+			break;
+		case HCI_AUTO_CONN_ALWAYS:
+			/* Devices advertising with ADV_IND or ADV_DIRECT_IND
+			 * are triggering a connection attempt. This means
+			 * that incoming connections from slave device are
+			 * accepted and also outgoing connections to slave
+			 * devices are established when found.
+			 */
+			break;
+		default:
+			return NULL;
+		}
+	}
+
+	conn = hci_connect_le(hdev, addr, addr_type, BT_SECURITY_LOW,
+			      hdev->def_le_autoconnect_timeout, HCI_ROLE_MASTER,
+			      direct_rpa);
+	if (!IS_ERR(conn)) {
+		/* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned
+		 * by higher layer that tried to connect, if no then
+		 * store the pointer since we don't really have any
+		 * other owner of the object besides the params that
+		 * triggered it. This way we can abort the connection if
+		 * the parameters get removed and keep the reference
+		 * count consistent once the connection is established.
+		 */
+
+		if (!params->explicit_connect)
+			params->conn = hci_conn_get(conn);
+
+		return conn;
+	}
+
+	switch (PTR_ERR(conn)) {
+	case -EBUSY:
+		/* If hci_connect() returns -EBUSY it means there is already
+		 * an LE connection attempt going on. Since controllers don't
+		 * support more than one connection attempt at the time, we
+		 * don't consider this an error case.
+		 */
+		break;
+	default:
+		BT_DBG("Failed to connect: err %ld", PTR_ERR(conn));
+		return NULL;
+	}
+
+	return NULL;
+}
+
+static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
+			       u8 bdaddr_type, bdaddr_t *direct_addr,
+			       u8 direct_addr_type, s8 rssi, u8 *data, u8 len,
+			       bool ext_adv)
+{
+	struct discovery_state *d = &hdev->discovery;
+	struct smp_irk *irk;
+	struct hci_conn *conn;
+	bool match;
+	u32 flags;
+	u8 *ptr;
+
+	switch (type) {
+	case LE_ADV_IND:
+	case LE_ADV_DIRECT_IND:
+	case LE_ADV_SCAN_IND:
+	case LE_ADV_NONCONN_IND:
+	case LE_ADV_SCAN_RSP:
+		break;
+	default:
+		bt_dev_err_ratelimited(hdev, "unknown advertising packet "
+				       "type: 0x%02x", type);
+		return;
+	}
+
+	if (!ext_adv && len > HCI_MAX_AD_LENGTH) {
+		bt_dev_err_ratelimited(hdev, "legacy adv larger than 31 bytes");
+		return;
+	}
+
+	/* Find the end of the data in case the report contains padded zero
+	 * bytes at the end causing an invalid length value.
+	 *
+	 * When data is NULL, len is 0 so there is no need for extra ptr
+	 * check as 'ptr < data + 0' is already false in such case.
+	 */
+	for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
+		if (ptr + 1 + *ptr > data + len)
+			break;
+	}
+
+	/* Adjust for actual length. This handles the case when remote
+	 * device is advertising with incorrect data length.
+	 */
+	len = ptr - data;
+
+	/* If the direct address is present, then this report is from
+	 * a LE Direct Advertising Report event. In that case it is
+	 * important to see if the address is matching the local
+	 * controller address.
+	 */
+	if (direct_addr) {
+		/* Only resolvable random addresses are valid for these
+		 * kind of reports and others can be ignored.
+		 */
+		if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type))
+			return;
+
+		/* If the controller is not using resolvable random
+		 * addresses, then this report can be ignored.
+		 */
+		if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
+			return;
+
+		/* If the local IRK of the controller does not match
+		 * with the resolvable random address provided, then
+		 * this report can be ignored.
+		 */
+		if (!smp_irk_matches(hdev, hdev->irk, direct_addr))
+			return;
+	}
+
+	/* Check if we need to convert to identity address */
+	irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
+	if (irk) {
+		bdaddr = &irk->bdaddr;
+		bdaddr_type = irk->addr_type;
+	}
+
+	/* Check if we have been requested to connect to this device.
+	 *
+	 * direct_addr is set only for directed advertising reports (it is NULL
+	 * for advertising reports) and is already verified to be RPA above.
+	 */
+	conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, type,
+								direct_addr);
+	if (!ext_adv && conn && type == LE_ADV_IND && len <= HCI_MAX_AD_LENGTH) {
+		/* Store report for later inclusion by
+		 * mgmt_device_connected
+		 */
+		memcpy(conn->le_adv_data, data, len);
+		conn->le_adv_data_len = len;
+	}
+
+	/* Passive scanning shouldn't trigger any device found events,
+	 * except for devices marked as CONN_REPORT for which we do send
+	 * device found events, or advertisement monitoring requested.
+	 */
+	if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
+		if (type == LE_ADV_DIRECT_IND)
+			return;
+
+		if (!hci_pend_le_action_lookup(&hdev->pend_le_reports,
+					       bdaddr, bdaddr_type) &&
+		    idr_is_empty(&hdev->adv_monitors_idr))
+			return;
+
+		if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
+			flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
+		else
+			flags = 0;
+		mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
+				  rssi, flags, data, len, NULL, 0);
+		return;
+	}
+
+	/* When receiving non-connectable or scannable undirected
+	 * advertising reports, this means that the remote device is
+	 * not connectable and then clearly indicate this in the
+	 * device found event.
+	 *
+	 * When receiving a scan response, then there is no way to
+	 * know if the remote device is connectable or not. However
+	 * since scan responses are merged with a previously seen
+	 * advertising report, the flags field from that report
+	 * will be used.
+	 *
+	 * In the really unlikely case that a controller get confused
+	 * and just sends a scan response event, then it is marked as
+	 * not connectable as well.
+	 */
+	if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND ||
+	    type == LE_ADV_SCAN_RSP)
+		flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
+	else
+		flags = 0;
+
+	/* If there's nothing pending either store the data from this
+	 * event or send an immediate device found event if the data
+	 * should not be stored for later.
+	 */
+	if (!ext_adv &&	!has_pending_adv_report(hdev)) {
+		/* If the report will trigger a SCAN_REQ store it for
+		 * later merging.
+		 */
+		if (type == LE_ADV_IND || type == LE_ADV_SCAN_IND) {
+			store_pending_adv_report(hdev, bdaddr, bdaddr_type,
+						 rssi, flags, data, len);
+			return;
+		}
+
+		mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
+				  rssi, flags, data, len, NULL, 0);
+		return;
+	}
+
+	/* Check if the pending report is for the same device as the new one */
+	match = (!bacmp(bdaddr, &d->last_adv_addr) &&
+		 bdaddr_type == d->last_adv_addr_type);
+
+	/* If the pending data doesn't match this report or this isn't a
+	 * scan response (e.g. we got a duplicate ADV_IND) then force
+	 * sending of the pending data.
+	 */
+	if (type != LE_ADV_SCAN_RSP || !match) {
+		/* Send out whatever is in the cache, but skip duplicates */
+		if (!match)
+			mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
+					  d->last_adv_addr_type, NULL,
+					  d->last_adv_rssi, d->last_adv_flags,
+					  d->last_adv_data,
+					  d->last_adv_data_len, NULL, 0);
+
+		/* If the new report will trigger a SCAN_REQ store it for
+		 * later merging.
+		 */
+		if (!ext_adv && (type == LE_ADV_IND ||
+				 type == LE_ADV_SCAN_IND)) {
+			store_pending_adv_report(hdev, bdaddr, bdaddr_type,
+						 rssi, flags, data, len);
+			return;
+		}
+
+		/* The advertising reports cannot be merged, so clear
+		 * the pending report and send out a device found event.
+		 */
+		clear_pending_adv_report(hdev);
+		mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
+				  rssi, flags, data, len, NULL, 0);
+		return;
+	}
+
+	/* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and
+	 * the new event is a SCAN_RSP. We can therefore proceed with
+	 * sending a merged device found event.
+	 */
+	mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
+			  d->last_adv_addr_type, NULL, rssi, d->last_adv_flags,
+			  d->last_adv_data, d->last_adv_data_len, data, len);
+	clear_pending_adv_report(hdev);
+}
+
+static void hci_le_adv_report_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	u8 num_reports = skb->data[0];
+	void *ptr = &skb->data[1];
+
+	hci_dev_lock(hdev);
+
+	while (num_reports--) {
+		struct hci_ev_le_advertising_info *ev = ptr;
+		s8 rssi;
+
+		if (ptr > (void *)skb_tail_pointer(skb) - sizeof(*ev)) {
+			bt_dev_err(hdev, "Malicious advertising data.");
+			break;
+		}
+
+		if (ev->length <= HCI_MAX_AD_LENGTH &&
+		    ev->data + ev->length <= skb_tail_pointer(skb)) {
+			rssi = ev->data[ev->length];
+			process_adv_report(hdev, ev->evt_type, &ev->bdaddr,
+					   ev->bdaddr_type, NULL, 0, rssi,
+					   ev->data, ev->length, false);
+		} else {
+			bt_dev_err(hdev, "Dropping invalid advertising data");
+		}
+
+		ptr += sizeof(*ev) + ev->length + 1;
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type)
+{
+	if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
+		switch (evt_type) {
+		case LE_LEGACY_ADV_IND:
+			return LE_ADV_IND;
+		case LE_LEGACY_ADV_DIRECT_IND:
+			return LE_ADV_DIRECT_IND;
+		case LE_LEGACY_ADV_SCAN_IND:
+			return LE_ADV_SCAN_IND;
+		case LE_LEGACY_NONCONN_IND:
+			return LE_ADV_NONCONN_IND;
+		case LE_LEGACY_SCAN_RSP_ADV:
+		case LE_LEGACY_SCAN_RSP_ADV_SCAN:
+			return LE_ADV_SCAN_RSP;
+		}
+
+		goto invalid;
+	}
+
+	if (evt_type & LE_EXT_ADV_CONN_IND) {
+		if (evt_type & LE_EXT_ADV_DIRECT_IND)
+			return LE_ADV_DIRECT_IND;
+
+		return LE_ADV_IND;
+	}
+
+	if (evt_type & LE_EXT_ADV_SCAN_RSP)
+		return LE_ADV_SCAN_RSP;
+
+	if (evt_type & LE_EXT_ADV_SCAN_IND)
+		return LE_ADV_SCAN_IND;
+
+	if (evt_type == LE_EXT_ADV_NON_CONN_IND ||
+	    evt_type & LE_EXT_ADV_DIRECT_IND)
+		return LE_ADV_NONCONN_IND;
+
+invalid:
+	bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x",
+			       evt_type);
+
+	return LE_ADV_INVALID;
+}
+
+static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	u8 num_reports = skb->data[0];
+	void *ptr = &skb->data[1];
+
+	hci_dev_lock(hdev);
+
+	while (num_reports--) {
+		struct hci_ev_le_ext_adv_report *ev = ptr;
+		u8 legacy_evt_type;
+		u16 evt_type;
+
+		evt_type = __le16_to_cpu(ev->evt_type);
+		legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type);
+		if (legacy_evt_type != LE_ADV_INVALID) {
+			process_adv_report(hdev, legacy_evt_type, &ev->bdaddr,
+					   ev->bdaddr_type, NULL, 0, ev->rssi,
+					   ev->data, ev->length,
+					   !(evt_type & LE_EXT_ADV_LEGACY_PDU));
+		}
+
+		ptr += sizeof(*ev) + ev->length;
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev,
+					    struct sk_buff *skb)
+{
+	struct hci_ev_le_remote_feat_complete *ev = (void *)skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+	if (conn) {
+		if (!ev->status)
+			memcpy(conn->features[0], ev->features, 8);
+
+		if (conn->state == BT_CONFIG) {
+			__u8 status;
+
+			/* If the local controller supports slave-initiated
+			 * features exchange, but the remote controller does
+			 * not, then it is possible that the error code 0x1a
+			 * for unsupported remote feature gets returned.
+			 *
+			 * In this specific case, allow the connection to
+			 * transition into connected state and mark it as
+			 * successful.
+			 */
+			if ((hdev->le_features[0] & HCI_LE_SLAVE_FEATURES) &&
+			    !conn->out && ev->status == 0x1a)
+				status = 0x00;
+			else
+				status = ev->status;
+
+			conn->state = BT_CONNECTED;
+			hci_connect_cfm(conn, status);
+			hci_conn_drop(conn);
+		}
+	}
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_le_ltk_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_le_ltk_req *ev = (void *) skb->data;
+	struct hci_cp_le_ltk_reply cp;
+	struct hci_cp_le_ltk_neg_reply neg;
+	struct hci_conn *conn;
+	struct smp_ltk *ltk;
+
+	BT_DBG("%s handle 0x%4.4x", hdev->name, __le16_to_cpu(ev->handle));
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+	if (conn == NULL)
+		goto not_found;
+
+	ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role);
+	if (!ltk)
+		goto not_found;
+
+	if (smp_ltk_is_sc(ltk)) {
+		/* With SC both EDiv and Rand are set to zero */
+		if (ev->ediv || ev->rand)
+			goto not_found;
+	} else {
+		/* For non-SC keys check that EDiv and Rand match */
+		if (ev->ediv != ltk->ediv || ev->rand != ltk->rand)
+			goto not_found;
+	}
+
+	memcpy(cp.ltk, ltk->val, ltk->enc_size);
+	memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
+	cp.handle = cpu_to_le16(conn->handle);
+
+	conn->pending_sec_level = smp_ltk_sec_level(ltk);
+
+	conn->enc_key_size = ltk->enc_size;
+
+	hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
+
+	/* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
+	 * temporary key used to encrypt a connection following
+	 * pairing. It is used during the Encrypted Session Setup to
+	 * distribute the keys. Later, security can be re-established
+	 * using a distributed LTK.
+	 */
+	if (ltk->type == SMP_STK) {
+		set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
+		list_del_rcu(&ltk->list);
+		kfree_rcu(ltk, rcu);
+	} else {
+		clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
+	}
+
+	hci_dev_unlock(hdev);
+
+	return;
+
+not_found:
+	neg.handle = ev->handle;
+	hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg);
+	hci_dev_unlock(hdev);
+}
+
+static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle,
+				      u8 reason)
+{
+	struct hci_cp_le_conn_param_req_neg_reply cp;
+
+	cp.handle = cpu_to_le16(handle);
+	cp.reason = reason;
+
+	hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp),
+		     &cp);
+}
+
+static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev,
+					     struct sk_buff *skb)
+{
+	struct hci_ev_le_remote_conn_param_req *ev = (void *) skb->data;
+	struct hci_cp_le_conn_param_req_reply cp;
+	struct hci_conn *hcon;
+	u16 handle, min, max, latency, timeout;
+
+	handle = le16_to_cpu(ev->handle);
+	min = le16_to_cpu(ev->interval_min);
+	max = le16_to_cpu(ev->interval_max);
+	latency = le16_to_cpu(ev->latency);
+	timeout = le16_to_cpu(ev->timeout);
+
+	hcon = hci_conn_hash_lookup_handle(hdev, handle);
+	if (!hcon || hcon->state != BT_CONNECTED)
+		return send_conn_param_neg_reply(hdev, handle,
+						 HCI_ERROR_UNKNOWN_CONN_ID);
+
+	if (hci_check_conn_params(min, max, latency, timeout))
+		return send_conn_param_neg_reply(hdev, handle,
+						 HCI_ERROR_INVALID_LL_PARAMS);
+
+	if (hcon->role == HCI_ROLE_MASTER) {
+		struct hci_conn_params *params;
+		u8 store_hint;
+
+		hci_dev_lock(hdev);
+
+		params = hci_conn_params_lookup(hdev, &hcon->dst,
+						hcon->dst_type);
+		if (params) {
+			params->conn_min_interval = min;
+			params->conn_max_interval = max;
+			params->conn_latency = latency;
+			params->supervision_timeout = timeout;
+			store_hint = 0x01;
+		} else{
+			store_hint = 0x00;
+		}
+
+		hci_dev_unlock(hdev);
+
+		mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type,
+				    store_hint, min, max, latency, timeout);
+	}
+
+	cp.handle = ev->handle;
+	cp.interval_min = ev->interval_min;
+	cp.interval_max = ev->interval_max;
+	cp.latency = ev->latency;
+	cp.timeout = ev->timeout;
+	cp.min_ce_len = 0;
+	cp.max_ce_len = 0;
+
+	hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp);
+}
+
+static void hci_le_direct_adv_report_evt(struct hci_dev *hdev,
+					 struct sk_buff *skb)
+{
+	u8 num_reports = skb->data[0];
+	struct hci_ev_le_direct_adv_info *ev = (void *)&skb->data[1];
+
+	if (!num_reports || skb->len < num_reports * sizeof(*ev) + 1)
+		return;
+
+	hci_dev_lock(hdev);
+
+	for (; num_reports; num_reports--, ev++)
+		process_adv_report(hdev, ev->evt_type, &ev->bdaddr,
+				   ev->bdaddr_type, &ev->direct_addr,
+				   ev->direct_addr_type, ev->rssi, NULL, 0,
+				   false);
+
+	hci_dev_unlock(hdev);
+}
+
+static void hci_le_phy_update_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_le_phy_update_complete *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	if (ev->status)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+	if (!conn)
+		goto unlock;
+
+	conn->le_tx_phy = ev->tx_phy;
+	conn->le_rx_phy = ev->rx_phy;
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_le_meta_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_ev_le_meta *le_ev = (void *) skb->data;
+
+	skb_pull(skb, sizeof(*le_ev));
+
+	switch (le_ev->subevent) {
+	case HCI_EV_LE_CONN_COMPLETE:
+		hci_le_conn_complete_evt(hdev, skb);
+		break;
+
+	case HCI_EV_LE_CONN_UPDATE_COMPLETE:
+		hci_le_conn_update_complete_evt(hdev, skb);
+		break;
+
+	case HCI_EV_LE_ADVERTISING_REPORT:
+		hci_le_adv_report_evt(hdev, skb);
+		break;
+
+	case HCI_EV_LE_REMOTE_FEAT_COMPLETE:
+		hci_le_remote_feat_complete_evt(hdev, skb);
+		break;
+
+	case HCI_EV_LE_LTK_REQ:
+		hci_le_ltk_request_evt(hdev, skb);
+		break;
+
+	case HCI_EV_LE_REMOTE_CONN_PARAM_REQ:
+		hci_le_remote_conn_param_req_evt(hdev, skb);
+		break;
+
+	case HCI_EV_LE_DIRECT_ADV_REPORT:
+		hci_le_direct_adv_report_evt(hdev, skb);
+		break;
+
+	case HCI_EV_LE_PHY_UPDATE_COMPLETE:
+		hci_le_phy_update_evt(hdev, skb);
+		break;
+
+	case HCI_EV_LE_EXT_ADV_REPORT:
+		hci_le_ext_adv_report_evt(hdev, skb);
+		break;
+
+	case HCI_EV_LE_ENHANCED_CONN_COMPLETE:
+		hci_le_enh_conn_complete_evt(hdev, skb);
+		break;
+
+	case HCI_EV_LE_EXT_ADV_SET_TERM:
+		hci_le_ext_adv_term_evt(hdev, skb);
+		break;
+
+	default:
+		break;
+	}
+}
+
+static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
+				 u8 event, struct sk_buff *skb)
+{
+	struct hci_ev_cmd_complete *ev;
+	struct hci_event_hdr *hdr;
+
+	if (!skb)
+		return false;
+
+	if (skb->len < sizeof(*hdr)) {
+		bt_dev_err(hdev, "too short HCI event");
+		return false;
+	}
+
+	hdr = (void *) skb->data;
+	skb_pull(skb, HCI_EVENT_HDR_SIZE);
+
+	if (event) {
+		if (hdr->evt != event)
+			return false;
+		return true;
+	}
+
+	/* Check if request ended in Command Status - no way to retreive
+	 * any extra parameters in this case.
+	 */
+	if (hdr->evt == HCI_EV_CMD_STATUS)
+		return false;
+
+	if (hdr->evt != HCI_EV_CMD_COMPLETE) {
+		bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
+			   hdr->evt);
+		return false;
+	}
+
+	if (skb->len < sizeof(*ev)) {
+		bt_dev_err(hdev, "too short cmd_complete event");
+		return false;
+	}
+
+	ev = (void *) skb->data;
+	skb_pull(skb, sizeof(*ev));
+
+	if (opcode != __le16_to_cpu(ev->opcode)) {
+		BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
+		       __le16_to_cpu(ev->opcode));
+		return false;
+	}
+
+	return true;
+}
+
+static void hci_store_wake_reason(struct hci_dev *hdev, u8 event,
+				  struct sk_buff *skb)
+{
+	struct hci_ev_le_advertising_info *adv;
+	struct hci_ev_le_direct_adv_info *direct_adv;
+	struct hci_ev_le_ext_adv_report *ext_adv;
+	const struct hci_ev_conn_complete *conn_complete = (void *)skb->data;
+	const struct hci_ev_conn_request *conn_request = (void *)skb->data;
+
+	hci_dev_lock(hdev);
+
+	/* If we are currently suspended and this is the first BT event seen,
+	 * save the wake reason associated with the event.
+	 */
+	if (!hdev->suspended || hdev->wake_reason)
+		goto unlock;
+
+	/* Default to remote wake. Values for wake_reason are documented in the
+	 * Bluez mgmt api docs.
+	 */
+	hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE;
+
+	/* Once configured for remote wakeup, we should only wake up for
+	 * reconnections. It's useful to see which device is waking us up so
+	 * keep track of the bdaddr of the connection event that woke us up.
+	 */
+	if (event == HCI_EV_CONN_REQUEST) {
+		bacpy(&hdev->wake_addr, &conn_complete->bdaddr);
+		hdev->wake_addr_type = BDADDR_BREDR;
+	} else if (event == HCI_EV_CONN_COMPLETE) {
+		bacpy(&hdev->wake_addr, &conn_request->bdaddr);
+		hdev->wake_addr_type = BDADDR_BREDR;
+	} else if (event == HCI_EV_LE_META) {
+		struct hci_ev_le_meta *le_ev = (void *)skb->data;
+		u8 subevent = le_ev->subevent;
+		u8 *ptr = &skb->data[sizeof(*le_ev)];
+		u8 num_reports = *ptr;
+
+		if ((subevent == HCI_EV_LE_ADVERTISING_REPORT ||
+		     subevent == HCI_EV_LE_DIRECT_ADV_REPORT ||
+		     subevent == HCI_EV_LE_EXT_ADV_REPORT) &&
+		    num_reports) {
+			adv = (void *)(ptr + 1);
+			direct_adv = (void *)(ptr + 1);
+			ext_adv = (void *)(ptr + 1);
+
+			switch (subevent) {
+			case HCI_EV_LE_ADVERTISING_REPORT:
+				bacpy(&hdev->wake_addr, &adv->bdaddr);
+				hdev->wake_addr_type = adv->bdaddr_type;
+				break;
+			case HCI_EV_LE_DIRECT_ADV_REPORT:
+				bacpy(&hdev->wake_addr, &direct_adv->bdaddr);
+				hdev->wake_addr_type = direct_adv->bdaddr_type;
+				break;
+			case HCI_EV_LE_EXT_ADV_REPORT:
+				bacpy(&hdev->wake_addr, &ext_adv->bdaddr);
+				hdev->wake_addr_type = ext_adv->bdaddr_type;
+				break;
+			}
+		}
+	} else {
+		hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED;
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_event_hdr *hdr = (void *) skb->data;
+	hci_req_complete_t req_complete = NULL;
+	hci_req_complete_skb_t req_complete_skb = NULL;
+	struct sk_buff *orig_skb = NULL;
+	u8 status = 0, event = hdr->evt, req_evt = 0;
+	u16 opcode = HCI_OP_NOP;
+
+	if (!event) {
+		bt_dev_warn(hdev, "Received unexpected HCI Event 00000000");
+		goto done;
+	}
+
+	if (hdev->sent_cmd && bt_cb(hdev->sent_cmd)->hci.req_event == event) {
+		struct hci_command_hdr *cmd_hdr = (void *) hdev->sent_cmd->data;
+		opcode = __le16_to_cpu(cmd_hdr->opcode);
+		hci_req_cmd_complete(hdev, opcode, status, &req_complete,
+				     &req_complete_skb);
+		req_evt = event;
+	}
+
+	/* If it looks like we might end up having to call
+	 * req_complete_skb, store a pristine copy of the skb since the
+	 * various handlers may modify the original one through
+	 * skb_pull() calls, etc.
+	 */
+	if (req_complete_skb || event == HCI_EV_CMD_STATUS ||
+	    event == HCI_EV_CMD_COMPLETE)
+		orig_skb = skb_clone(skb, GFP_KERNEL);
+
+	skb_pull(skb, HCI_EVENT_HDR_SIZE);
+
+	/* Store wake reason if we're suspended */
+	hci_store_wake_reason(hdev, event, skb);
+
+	switch (event) {
+	case HCI_EV_INQUIRY_COMPLETE:
+		hci_inquiry_complete_evt(hdev, skb);
+		break;
+
+	case HCI_EV_INQUIRY_RESULT:
+		hci_inquiry_result_evt(hdev, skb);
+		break;
+
+	case HCI_EV_CONN_COMPLETE:
+		hci_conn_complete_evt(hdev, skb);
+		break;
+
+	case HCI_EV_CONN_REQUEST:
+		hci_conn_request_evt(hdev, skb);
+		break;
+
+	case HCI_EV_DISCONN_COMPLETE:
+		hci_disconn_complete_evt(hdev, skb);
+		break;
+
+	case HCI_EV_AUTH_COMPLETE:
+		hci_auth_complete_evt(hdev, skb);
+		break;
+
+	case HCI_EV_REMOTE_NAME:
+		hci_remote_name_evt(hdev, skb);
+		break;
+
+	case HCI_EV_ENCRYPT_CHANGE:
+		hci_encrypt_change_evt(hdev, skb);
+		break;
+
+	case HCI_EV_CHANGE_LINK_KEY_COMPLETE:
+		hci_change_link_key_complete_evt(hdev, skb);
+		break;
+
+	case HCI_EV_REMOTE_FEATURES:
+		hci_remote_features_evt(hdev, skb);
+		break;
+
+	case HCI_EV_CMD_COMPLETE:
+		hci_cmd_complete_evt(hdev, skb, &opcode, &status,
+				     &req_complete, &req_complete_skb);
+		break;
+
+	case HCI_EV_CMD_STATUS:
+		hci_cmd_status_evt(hdev, skb, &opcode, &status, &req_complete,
+				   &req_complete_skb);
+		break;
+
+	case HCI_EV_HARDWARE_ERROR:
+		hci_hardware_error_evt(hdev, skb);
+		break;
+
+	case HCI_EV_ROLE_CHANGE:
+		hci_role_change_evt(hdev, skb);
+		break;
+
+	case HCI_EV_NUM_COMP_PKTS:
+		hci_num_comp_pkts_evt(hdev, skb);
+		break;
+
+	case HCI_EV_MODE_CHANGE:
+		hci_mode_change_evt(hdev, skb);
+		break;
+
+	case HCI_EV_PIN_CODE_REQ:
+		hci_pin_code_request_evt(hdev, skb);
+		break;
+
+	case HCI_EV_LINK_KEY_REQ:
+		hci_link_key_request_evt(hdev, skb);
+		break;
+
+	case HCI_EV_LINK_KEY_NOTIFY:
+		hci_link_key_notify_evt(hdev, skb);
+		break;
+
+	case HCI_EV_CLOCK_OFFSET:
+		hci_clock_offset_evt(hdev, skb);
+		break;
+
+	case HCI_EV_PKT_TYPE_CHANGE:
+		hci_pkt_type_change_evt(hdev, skb);
+		break;
+
+	case HCI_EV_PSCAN_REP_MODE:
+		hci_pscan_rep_mode_evt(hdev, skb);
+		break;
+
+	case HCI_EV_INQUIRY_RESULT_WITH_RSSI:
+		hci_inquiry_result_with_rssi_evt(hdev, skb);
+		break;
+
+	case HCI_EV_REMOTE_EXT_FEATURES:
+		hci_remote_ext_features_evt(hdev, skb);
+		break;
+
+	case HCI_EV_SYNC_CONN_COMPLETE:
+		hci_sync_conn_complete_evt(hdev, skb);
+		break;
+
+	case HCI_EV_EXTENDED_INQUIRY_RESULT:
+		hci_extended_inquiry_result_evt(hdev, skb);
+		break;
+
+	case HCI_EV_KEY_REFRESH_COMPLETE:
+		hci_key_refresh_complete_evt(hdev, skb);
+		break;
+
+	case HCI_EV_IO_CAPA_REQUEST:
+		hci_io_capa_request_evt(hdev, skb);
+		break;
+
+	case HCI_EV_IO_CAPA_REPLY:
+		hci_io_capa_reply_evt(hdev, skb);
+		break;
+
+	case HCI_EV_USER_CONFIRM_REQUEST:
+		hci_user_confirm_request_evt(hdev, skb);
+		break;
+
+	case HCI_EV_USER_PASSKEY_REQUEST:
+		hci_user_passkey_request_evt(hdev, skb);
+		break;
+
+	case HCI_EV_USER_PASSKEY_NOTIFY:
+		hci_user_passkey_notify_evt(hdev, skb);
+		break;
+
+	case HCI_EV_KEYPRESS_NOTIFY:
+		hci_keypress_notify_evt(hdev, skb);
+		break;
+
+	case HCI_EV_SIMPLE_PAIR_COMPLETE:
+		hci_simple_pair_complete_evt(hdev, skb);
+		break;
+
+	case HCI_EV_REMOTE_HOST_FEATURES:
+		hci_remote_host_features_evt(hdev, skb);
+		break;
+
+	case HCI_EV_LE_META:
+		hci_le_meta_evt(hdev, skb);
+		break;
+
+	case HCI_EV_REMOTE_OOB_DATA_REQUEST:
+		hci_remote_oob_data_request_evt(hdev, skb);
+		break;
+
+#if IS_ENABLED(CONFIG_BT_HS)
+	case HCI_EV_CHANNEL_SELECTED:
+		hci_chan_selected_evt(hdev, skb);
+		break;
+
+	case HCI_EV_PHY_LINK_COMPLETE:
+		hci_phy_link_complete_evt(hdev, skb);
+		break;
+
+	case HCI_EV_LOGICAL_LINK_COMPLETE:
+		hci_loglink_complete_evt(hdev, skb);
+		break;
+
+	case HCI_EV_DISCONN_LOGICAL_LINK_COMPLETE:
+		hci_disconn_loglink_complete_evt(hdev, skb);
+		break;
+
+	case HCI_EV_DISCONN_PHY_LINK_COMPLETE:
+		hci_disconn_phylink_complete_evt(hdev, skb);
+		break;
+#endif
+
+	case HCI_EV_NUM_COMP_BLOCKS:
+		hci_num_comp_blocks_evt(hdev, skb);
+		break;
+
+	case HCI_EV_VENDOR:
+		msft_vendor_evt(hdev, skb);
+		break;
+
+	default:
+		BT_DBG("%s event 0x%2.2x", hdev->name, event);
+		break;
+	}
+
+	if (req_complete) {
+		req_complete(hdev, status, opcode);
+	} else if (req_complete_skb) {
+		if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) {
+			kfree_skb(orig_skb);
+			orig_skb = NULL;
+		}
+		req_complete_skb(hdev, status, opcode, orig_skb);
+	}
+
+done:
+	kfree_skb(orig_skb);
+	kfree_skb(skb);
+	hdev->stat.evt_rx++;
+}
diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
new file mode 100644
index 000000000..a0f980e61
--- /dev/null
+++ b/net/bluetooth/hci_request.c
@@ -0,0 +1,3452 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+
+   Copyright (C) 2014 Intel Corporation
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#include <linux/sched/signal.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/mgmt.h>
+
+#include "smp.h"
+#include "hci_request.h"
+
+#define HCI_REQ_DONE	  0
+#define HCI_REQ_PEND	  1
+#define HCI_REQ_CANCELED  2
+
+void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
+{
+	skb_queue_head_init(&req->cmd_q);
+	req->hdev = hdev;
+	req->err = 0;
+}
+
+void hci_req_purge(struct hci_request *req)
+{
+	skb_queue_purge(&req->cmd_q);
+}
+
+bool hci_req_status_pend(struct hci_dev *hdev)
+{
+	return hdev->req_status == HCI_REQ_PEND;
+}
+
+static int req_run(struct hci_request *req, hci_req_complete_t complete,
+		   hci_req_complete_skb_t complete_skb)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct sk_buff *skb;
+	unsigned long flags;
+
+	BT_DBG("length %u", skb_queue_len(&req->cmd_q));
+
+	/* If an error occurred during request building, remove all HCI
+	 * commands queued on the HCI request queue.
+	 */
+	if (req->err) {
+		skb_queue_purge(&req->cmd_q);
+		return req->err;
+	}
+
+	/* Do not allow empty requests */
+	if (skb_queue_empty(&req->cmd_q))
+		return -ENODATA;
+
+	skb = skb_peek_tail(&req->cmd_q);
+	if (complete) {
+		bt_cb(skb)->hci.req_complete = complete;
+	} else if (complete_skb) {
+		bt_cb(skb)->hci.req_complete_skb = complete_skb;
+		bt_cb(skb)->hci.req_flags |= HCI_REQ_SKB;
+	}
+
+	spin_lock_irqsave(&hdev->cmd_q.lock, flags);
+	skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
+	spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
+
+	queue_work(hdev->workqueue, &hdev->cmd_work);
+
+	return 0;
+}
+
+int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
+{
+	return req_run(req, complete, NULL);
+}
+
+int hci_req_run_skb(struct hci_request *req, hci_req_complete_skb_t complete)
+{
+	return req_run(req, NULL, complete);
+}
+
+static void hci_req_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
+				  struct sk_buff *skb)
+{
+	BT_DBG("%s result 0x%2.2x", hdev->name, result);
+
+	if (hdev->req_status == HCI_REQ_PEND) {
+		hdev->req_result = result;
+		hdev->req_status = HCI_REQ_DONE;
+		if (skb)
+			hdev->req_skb = skb_get(skb);
+		wake_up_interruptible(&hdev->req_wait_q);
+	}
+}
+
+void hci_req_sync_cancel(struct hci_dev *hdev, int err)
+{
+	BT_DBG("%s err 0x%2.2x", hdev->name, err);
+
+	if (hdev->req_status == HCI_REQ_PEND) {
+		hdev->req_result = err;
+		hdev->req_status = HCI_REQ_CANCELED;
+		wake_up_interruptible(&hdev->req_wait_q);
+	}
+}
+
+struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
+				  const void *param, u8 event, u32 timeout)
+{
+	struct hci_request req;
+	struct sk_buff *skb;
+	int err = 0;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_req_init(&req, hdev);
+
+	hci_req_add_ev(&req, opcode, plen, param, event);
+
+	hdev->req_status = HCI_REQ_PEND;
+
+	err = hci_req_run_skb(&req, hci_req_sync_complete);
+	if (err < 0)
+		return ERR_PTR(err);
+
+	err = wait_event_interruptible_timeout(hdev->req_wait_q,
+			hdev->req_status != HCI_REQ_PEND, timeout);
+
+	if (err == -ERESTARTSYS)
+		return ERR_PTR(-EINTR);
+
+	switch (hdev->req_status) {
+	case HCI_REQ_DONE:
+		err = -bt_to_errno(hdev->req_result);
+		break;
+
+	case HCI_REQ_CANCELED:
+		err = -hdev->req_result;
+		break;
+
+	default:
+		err = -ETIMEDOUT;
+		break;
+	}
+
+	hdev->req_status = hdev->req_result = 0;
+	skb = hdev->req_skb;
+	hdev->req_skb = NULL;
+
+	BT_DBG("%s end: err %d", hdev->name, err);
+
+	if (err < 0) {
+		kfree_skb(skb);
+		return ERR_PTR(err);
+	}
+
+	if (!skb)
+		return ERR_PTR(-ENODATA);
+
+	return skb;
+}
+EXPORT_SYMBOL(__hci_cmd_sync_ev);
+
+struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
+			       const void *param, u32 timeout)
+{
+	return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
+}
+EXPORT_SYMBOL(__hci_cmd_sync);
+
+/* Execute request and wait for completion. */
+int __hci_req_sync(struct hci_dev *hdev, int (*func)(struct hci_request *req,
+						     unsigned long opt),
+		   unsigned long opt, u32 timeout, u8 *hci_status)
+{
+	struct hci_request req;
+	int err = 0;
+
+	BT_DBG("%s start", hdev->name);
+
+	hci_req_init(&req, hdev);
+
+	hdev->req_status = HCI_REQ_PEND;
+
+	err = func(&req, opt);
+	if (err) {
+		if (hci_status)
+			*hci_status = HCI_ERROR_UNSPECIFIED;
+		return err;
+	}
+
+	err = hci_req_run_skb(&req, hci_req_sync_complete);
+	if (err < 0) {
+		hdev->req_status = 0;
+
+		/* ENODATA means the HCI request command queue is empty.
+		 * This can happen when a request with conditionals doesn't
+		 * trigger any commands to be sent. This is normal behavior
+		 * and should not trigger an error return.
+		 */
+		if (err == -ENODATA) {
+			if (hci_status)
+				*hci_status = 0;
+			return 0;
+		}
+
+		if (hci_status)
+			*hci_status = HCI_ERROR_UNSPECIFIED;
+
+		return err;
+	}
+
+	err = wait_event_interruptible_timeout(hdev->req_wait_q,
+			hdev->req_status != HCI_REQ_PEND, timeout);
+
+	if (err == -ERESTARTSYS)
+		return -EINTR;
+
+	switch (hdev->req_status) {
+	case HCI_REQ_DONE:
+		err = -bt_to_errno(hdev->req_result);
+		if (hci_status)
+			*hci_status = hdev->req_result;
+		break;
+
+	case HCI_REQ_CANCELED:
+		err = -hdev->req_result;
+		if (hci_status)
+			*hci_status = HCI_ERROR_UNSPECIFIED;
+		break;
+
+	default:
+		err = -ETIMEDOUT;
+		if (hci_status)
+			*hci_status = HCI_ERROR_UNSPECIFIED;
+		break;
+	}
+
+	kfree_skb(hdev->req_skb);
+	hdev->req_skb = NULL;
+	hdev->req_status = hdev->req_result = 0;
+
+	BT_DBG("%s end: err %d", hdev->name, err);
+
+	return err;
+}
+
+int hci_req_sync(struct hci_dev *hdev, int (*req)(struct hci_request *req,
+						  unsigned long opt),
+		 unsigned long opt, u32 timeout, u8 *hci_status)
+{
+	int ret;
+
+	/* Serialize all requests */
+	hci_req_sync_lock(hdev);
+	/* check the state after obtaing the lock to protect the HCI_UP
+	 * against any races from hci_dev_do_close when the controller
+	 * gets removed.
+	 */
+	if (test_bit(HCI_UP, &hdev->flags))
+		ret = __hci_req_sync(hdev, req, opt, timeout, hci_status);
+	else
+		ret = -ENETDOWN;
+	hci_req_sync_unlock(hdev);
+
+	return ret;
+}
+
+struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode, u32 plen,
+				const void *param)
+{
+	int len = HCI_COMMAND_HDR_SIZE + plen;
+	struct hci_command_hdr *hdr;
+	struct sk_buff *skb;
+
+	skb = bt_skb_alloc(len, GFP_ATOMIC);
+	if (!skb)
+		return NULL;
+
+	hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE);
+	hdr->opcode = cpu_to_le16(opcode);
+	hdr->plen   = plen;
+
+	if (plen)
+		skb_put_data(skb, param, plen);
+
+	BT_DBG("skb len %d", skb->len);
+
+	hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
+	hci_skb_opcode(skb) = opcode;
+
+	return skb;
+}
+
+/* Queue a command to an asynchronous HCI request */
+void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
+		    const void *param, u8 event)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct sk_buff *skb;
+
+	BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
+
+	/* If an error occurred during request building, there is no point in
+	 * queueing the HCI command. We can simply return.
+	 */
+	if (req->err)
+		return;
+
+	skb = hci_prepare_cmd(hdev, opcode, plen, param);
+	if (!skb) {
+		bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
+			   opcode);
+		req->err = -ENOMEM;
+		return;
+	}
+
+	if (skb_queue_empty(&req->cmd_q))
+		bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
+
+	bt_cb(skb)->hci.req_event = event;
+
+	skb_queue_tail(&req->cmd_q, skb);
+}
+
+void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
+		 const void *param)
+{
+	hci_req_add_ev(req, opcode, plen, param, 0);
+}
+
+void __hci_req_write_fast_connectable(struct hci_request *req, bool enable)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct hci_cp_write_page_scan_activity acp;
+	u8 type;
+
+	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
+		return;
+
+	if (hdev->hci_ver < BLUETOOTH_VER_1_2)
+		return;
+
+	if (enable) {
+		type = PAGE_SCAN_TYPE_INTERLACED;
+
+		/* 160 msec page scan interval */
+		acp.interval = cpu_to_le16(0x0100);
+	} else {
+		type = hdev->def_page_scan_type;
+		acp.interval = cpu_to_le16(hdev->def_page_scan_int);
+	}
+
+	acp.window = cpu_to_le16(hdev->def_page_scan_window);
+
+	if (__cpu_to_le16(hdev->page_scan_interval) != acp.interval ||
+	    __cpu_to_le16(hdev->page_scan_window) != acp.window)
+		hci_req_add(req, HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
+			    sizeof(acp), &acp);
+
+	if (hdev->page_scan_type != type)
+		hci_req_add(req, HCI_OP_WRITE_PAGE_SCAN_TYPE, 1, &type);
+}
+
+static void start_interleave_scan(struct hci_dev *hdev)
+{
+	hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
+	queue_delayed_work(hdev->req_workqueue,
+			   &hdev->interleave_scan, 0);
+}
+
+static bool is_interleave_scanning(struct hci_dev *hdev)
+{
+	return hdev->interleave_scan_state != INTERLEAVE_SCAN_NONE;
+}
+
+static void cancel_interleave_scan(struct hci_dev *hdev)
+{
+	bt_dev_dbg(hdev, "cancelling interleave scan");
+
+	cancel_delayed_work_sync(&hdev->interleave_scan);
+
+	hdev->interleave_scan_state = INTERLEAVE_SCAN_NONE;
+}
+
+/* Return true if interleave_scan wasn't started until exiting this function,
+ * otherwise, return false
+ */
+static bool __hci_update_interleaved_scan(struct hci_dev *hdev)
+{
+	/* If there is at least one ADV monitors and one pending LE connection
+	 * or one device to be scanned for, we should alternate between
+	 * allowlist scan and one without any filters to save power.
+	 */
+	bool use_interleaving = hci_is_adv_monitoring(hdev) &&
+				!(list_empty(&hdev->pend_le_conns) &&
+				  list_empty(&hdev->pend_le_reports));
+	bool is_interleaving = is_interleave_scanning(hdev);
+
+	if (use_interleaving && !is_interleaving) {
+		start_interleave_scan(hdev);
+		bt_dev_dbg(hdev, "starting interleave scan");
+		return true;
+	}
+
+	if (!use_interleaving && is_interleaving)
+		cancel_interleave_scan(hdev);
+
+	return false;
+}
+
+/* This function controls the background scanning based on hdev->pend_le_conns
+ * list. If there are pending LE connection we start the background scanning,
+ * otherwise we stop it.
+ *
+ * This function requires the caller holds hdev->lock.
+ */
+static void __hci_update_background_scan(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+
+	if (!test_bit(HCI_UP, &hdev->flags) ||
+	    test_bit(HCI_INIT, &hdev->flags) ||
+	    hci_dev_test_flag(hdev, HCI_SETUP) ||
+	    hci_dev_test_flag(hdev, HCI_CONFIG) ||
+	    hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
+	    hci_dev_test_flag(hdev, HCI_UNREGISTER))
+		return;
+
+	/* No point in doing scanning if LE support hasn't been enabled */
+	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
+		return;
+
+	/* If discovery is active don't interfere with it */
+	if (hdev->discovery.state != DISCOVERY_STOPPED)
+		return;
+
+	/* Reset RSSI and UUID filters when starting background scanning
+	 * since these filters are meant for service discovery only.
+	 *
+	 * The Start Discovery and Start Service Discovery operations
+	 * ensure to set proper values for RSSI threshold and UUID
+	 * filter list. So it is safe to just reset them here.
+	 */
+	hci_discovery_filter_clear(hdev);
+
+	BT_DBG("%s ADV monitoring is %s", hdev->name,
+	       hci_is_adv_monitoring(hdev) ? "on" : "off");
+
+	if (list_empty(&hdev->pend_le_conns) &&
+	    list_empty(&hdev->pend_le_reports) &&
+	    !hci_is_adv_monitoring(hdev)) {
+		/* If there is no pending LE connections or devices
+		 * to be scanned for or no ADV monitors, we should stop the
+		 * background scanning.
+		 */
+
+		/* If controller is not scanning we are done. */
+		if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
+			return;
+
+		hci_req_add_le_scan_disable(req, false);
+
+		BT_DBG("%s stopping background scanning", hdev->name);
+	} else {
+		/* If there is at least one pending LE connection, we should
+		 * keep the background scan running.
+		 */
+
+		/* If controller is connecting, we should not start scanning
+		 * since some controllers are not able to scan and connect at
+		 * the same time.
+		 */
+		if (hci_lookup_le_connect(hdev))
+			return;
+
+		/* If controller is currently scanning, we stop it to ensure we
+		 * don't miss any advertising (due to duplicates filter).
+		 */
+		if (hci_dev_test_flag(hdev, HCI_LE_SCAN))
+			hci_req_add_le_scan_disable(req, false);
+
+		hci_req_add_le_passive_scan(req);
+		bt_dev_dbg(hdev, "starting background scanning");
+	}
+}
+
+void __hci_req_update_name(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct hci_cp_write_local_name cp;
+
+	memcpy(cp.name, hdev->dev_name, sizeof(cp.name));
+
+	hci_req_add(req, HCI_OP_WRITE_LOCAL_NAME, sizeof(cp), &cp);
+}
+
+#define PNP_INFO_SVCLASS_ID		0x1200
+
+static u8 *create_uuid16_list(struct hci_dev *hdev, u8 *data, ptrdiff_t len)
+{
+	u8 *ptr = data, *uuids_start = NULL;
+	struct bt_uuid *uuid;
+
+	if (len < 4)
+		return ptr;
+
+	list_for_each_entry(uuid, &hdev->uuids, list) {
+		u16 uuid16;
+
+		if (uuid->size != 16)
+			continue;
+
+		uuid16 = get_unaligned_le16(&uuid->uuid[12]);
+		if (uuid16 < 0x1100)
+			continue;
+
+		if (uuid16 == PNP_INFO_SVCLASS_ID)
+			continue;
+
+		if (!uuids_start) {
+			uuids_start = ptr;
+			uuids_start[0] = 1;
+			uuids_start[1] = EIR_UUID16_ALL;
+			ptr += 2;
+		}
+
+		/* Stop if not enough space to put next UUID */
+		if ((ptr - data) + sizeof(u16) > len) {
+			uuids_start[1] = EIR_UUID16_SOME;
+			break;
+		}
+
+		*ptr++ = (uuid16 & 0x00ff);
+		*ptr++ = (uuid16 & 0xff00) >> 8;
+		uuids_start[0] += sizeof(uuid16);
+	}
+
+	return ptr;
+}
+
+static u8 *create_uuid32_list(struct hci_dev *hdev, u8 *data, ptrdiff_t len)
+{
+	u8 *ptr = data, *uuids_start = NULL;
+	struct bt_uuid *uuid;
+
+	if (len < 6)
+		return ptr;
+
+	list_for_each_entry(uuid, &hdev->uuids, list) {
+		if (uuid->size != 32)
+			continue;
+
+		if (!uuids_start) {
+			uuids_start = ptr;
+			uuids_start[0] = 1;
+			uuids_start[1] = EIR_UUID32_ALL;
+			ptr += 2;
+		}
+
+		/* Stop if not enough space to put next UUID */
+		if ((ptr - data) + sizeof(u32) > len) {
+			uuids_start[1] = EIR_UUID32_SOME;
+			break;
+		}
+
+		memcpy(ptr, &uuid->uuid[12], sizeof(u32));
+		ptr += sizeof(u32);
+		uuids_start[0] += sizeof(u32);
+	}
+
+	return ptr;
+}
+
+static u8 *create_uuid128_list(struct hci_dev *hdev, u8 *data, ptrdiff_t len)
+{
+	u8 *ptr = data, *uuids_start = NULL;
+	struct bt_uuid *uuid;
+
+	if (len < 18)
+		return ptr;
+
+	list_for_each_entry(uuid, &hdev->uuids, list) {
+		if (uuid->size != 128)
+			continue;
+
+		if (!uuids_start) {
+			uuids_start = ptr;
+			uuids_start[0] = 1;
+			uuids_start[1] = EIR_UUID128_ALL;
+			ptr += 2;
+		}
+
+		/* Stop if not enough space to put next UUID */
+		if ((ptr - data) + 16 > len) {
+			uuids_start[1] = EIR_UUID128_SOME;
+			break;
+		}
+
+		memcpy(ptr, uuid->uuid, 16);
+		ptr += 16;
+		uuids_start[0] += 16;
+	}
+
+	return ptr;
+}
+
+static void create_eir(struct hci_dev *hdev, u8 *data)
+{
+	u8 *ptr = data;
+	size_t name_len;
+
+	name_len = strlen(hdev->dev_name);
+
+	if (name_len > 0) {
+		/* EIR Data type */
+		if (name_len > 48) {
+			name_len = 48;
+			ptr[1] = EIR_NAME_SHORT;
+		} else
+			ptr[1] = EIR_NAME_COMPLETE;
+
+		/* EIR Data length */
+		ptr[0] = name_len + 1;
+
+		memcpy(ptr + 2, hdev->dev_name, name_len);
+
+		ptr += (name_len + 2);
+	}
+
+	if (hdev->inq_tx_power != HCI_TX_POWER_INVALID) {
+		ptr[0] = 2;
+		ptr[1] = EIR_TX_POWER;
+		ptr[2] = (u8) hdev->inq_tx_power;
+
+		ptr += 3;
+	}
+
+	if (hdev->devid_source > 0) {
+		ptr[0] = 9;
+		ptr[1] = EIR_DEVICE_ID;
+
+		put_unaligned_le16(hdev->devid_source, ptr + 2);
+		put_unaligned_le16(hdev->devid_vendor, ptr + 4);
+		put_unaligned_le16(hdev->devid_product, ptr + 6);
+		put_unaligned_le16(hdev->devid_version, ptr + 8);
+
+		ptr += 10;
+	}
+
+	ptr = create_uuid16_list(hdev, ptr, HCI_MAX_EIR_LENGTH - (ptr - data));
+	ptr = create_uuid32_list(hdev, ptr, HCI_MAX_EIR_LENGTH - (ptr - data));
+	ptr = create_uuid128_list(hdev, ptr, HCI_MAX_EIR_LENGTH - (ptr - data));
+}
+
+void __hci_req_update_eir(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct hci_cp_write_eir cp;
+
+	if (!hdev_is_powered(hdev))
+		return;
+
+	if (!lmp_ext_inq_capable(hdev))
+		return;
+
+	if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
+		return;
+
+	if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
+		return;
+
+	memset(&cp, 0, sizeof(cp));
+
+	create_eir(hdev, cp.data);
+
+	if (memcmp(cp.data, hdev->eir, sizeof(cp.data)) == 0)
+		return;
+
+	memcpy(hdev->eir, cp.data, sizeof(cp.data));
+
+	hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
+}
+
+void hci_req_add_le_scan_disable(struct hci_request *req, bool rpa_le_conn)
+{
+	struct hci_dev *hdev = req->hdev;
+
+	if (hdev->scanning_paused) {
+		bt_dev_dbg(hdev, "Scanning is paused for suspend");
+		return;
+	}
+
+	if (use_ext_scan(hdev)) {
+		struct hci_cp_le_set_ext_scan_enable cp;
+
+		memset(&cp, 0, sizeof(cp));
+		cp.enable = LE_SCAN_DISABLE;
+		hci_req_add(req, HCI_OP_LE_SET_EXT_SCAN_ENABLE, sizeof(cp),
+			    &cp);
+	} else {
+		struct hci_cp_le_set_scan_enable cp;
+
+		memset(&cp, 0, sizeof(cp));
+		cp.enable = LE_SCAN_DISABLE;
+		hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
+	}
+
+	/* Disable address resolution */
+	if (use_ll_privacy(hdev) &&
+	    hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY) &&
+	    hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION) && !rpa_le_conn) {
+		__u8 enable = 0x00;
+
+		hci_req_add(req, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE, 1, &enable);
+	}
+}
+
+static void del_from_accept_list(struct hci_request *req, bdaddr_t *bdaddr,
+				 u8 bdaddr_type)
+{
+	struct hci_cp_le_del_from_accept_list cp;
+
+	cp.bdaddr_type = bdaddr_type;
+	bacpy(&cp.bdaddr, bdaddr);
+
+	bt_dev_dbg(req->hdev, "Remove %pMR (0x%x) from accept list", &cp.bdaddr,
+		   cp.bdaddr_type);
+	hci_req_add(req, HCI_OP_LE_DEL_FROM_ACCEPT_LIST, sizeof(cp), &cp);
+
+	if (use_ll_privacy(req->hdev) &&
+	    hci_dev_test_flag(req->hdev, HCI_ENABLE_LL_PRIVACY)) {
+		struct smp_irk *irk;
+
+		irk = hci_find_irk_by_addr(req->hdev, bdaddr, bdaddr_type);
+		if (irk) {
+			struct hci_cp_le_del_from_resolv_list cp;
+
+			cp.bdaddr_type = bdaddr_type;
+			bacpy(&cp.bdaddr, bdaddr);
+
+			hci_req_add(req, HCI_OP_LE_DEL_FROM_RESOLV_LIST,
+				    sizeof(cp), &cp);
+		}
+	}
+}
+
+/* Adds connection to accept list if needed. On error, returns -1. */
+static int add_to_accept_list(struct hci_request *req,
+			      struct hci_conn_params *params, u8 *num_entries,
+			      bool allow_rpa)
+{
+	struct hci_cp_le_add_to_accept_list cp;
+	struct hci_dev *hdev = req->hdev;
+
+	/* Already in accept list */
+	if (hci_bdaddr_list_lookup(&hdev->le_accept_list, &params->addr,
+				   params->addr_type))
+		return 0;
+
+	/* Select filter policy to accept all advertising */
+	if (*num_entries >= hdev->le_accept_list_size)
+		return -1;
+
+	/* Accept list can not be used with RPAs */
+	if (!allow_rpa &&
+	    !hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY) &&
+	    hci_find_irk_by_addr(hdev, &params->addr, params->addr_type)) {
+		return -1;
+	}
+
+	/* During suspend, only wakeable devices can be in accept list */
+	if (hdev->suspended && !hci_conn_test_flag(HCI_CONN_FLAG_REMOTE_WAKEUP,
+						   params->current_flags))
+		return 0;
+
+	*num_entries += 1;
+	cp.bdaddr_type = params->addr_type;
+	bacpy(&cp.bdaddr, &params->addr);
+
+	bt_dev_dbg(hdev, "Add %pMR (0x%x) to accept list", &cp.bdaddr,
+		   cp.bdaddr_type);
+	hci_req_add(req, HCI_OP_LE_ADD_TO_ACCEPT_LIST, sizeof(cp), &cp);
+
+	if (use_ll_privacy(hdev) &&
+	    hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY)) {
+		struct smp_irk *irk;
+
+		irk = hci_find_irk_by_addr(hdev, &params->addr,
+					   params->addr_type);
+		if (irk) {
+			struct hci_cp_le_add_to_resolv_list cp;
+
+			cp.bdaddr_type = params->addr_type;
+			bacpy(&cp.bdaddr, &params->addr);
+			memcpy(cp.peer_irk, irk->val, 16);
+
+			if (hci_dev_test_flag(hdev, HCI_PRIVACY))
+				memcpy(cp.local_irk, hdev->irk, 16);
+			else
+				memset(cp.local_irk, 0, 16);
+
+			hci_req_add(req, HCI_OP_LE_ADD_TO_RESOLV_LIST,
+				    sizeof(cp), &cp);
+		}
+	}
+
+	return 0;
+}
+
+static u8 update_accept_list(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct hci_conn_params *params;
+	struct bdaddr_list *b;
+	u8 num_entries = 0;
+	bool pend_conn, pend_report;
+	/* We allow usage of accept list even with RPAs in suspend. In the worst
+	 * case, we won't be able to wake from devices that use the privacy1.2
+	 * features. Additionally, once we support privacy1.2 and IRK
+	 * offloading, we can update this to also check for those conditions.
+	 */
+	bool allow_rpa = hdev->suspended;
+
+	if (use_ll_privacy(hdev) &&
+	    hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
+		allow_rpa = true;
+
+	/* Go through the current accept list programmed into the
+	 * controller one by one and check if that address is still
+	 * in the list of pending connections or list of devices to
+	 * report. If not present in either list, then queue the
+	 * command to remove it from the controller.
+	 */
+	list_for_each_entry(b, &hdev->le_accept_list, list) {
+		pend_conn = hci_pend_le_action_lookup(&hdev->pend_le_conns,
+						      &b->bdaddr,
+						      b->bdaddr_type);
+		pend_report = hci_pend_le_action_lookup(&hdev->pend_le_reports,
+							&b->bdaddr,
+							b->bdaddr_type);
+
+		/* If the device is not likely to connect or report,
+		 * remove it from the accept list.
+		 */
+		if (!pend_conn && !pend_report) {
+			del_from_accept_list(req, &b->bdaddr, b->bdaddr_type);
+			continue;
+		}
+
+		/* Accept list can not be used with RPAs */
+		if (!allow_rpa &&
+		    !hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY) &&
+		    hci_find_irk_by_addr(hdev, &b->bdaddr, b->bdaddr_type)) {
+			return 0x00;
+		}
+
+		num_entries++;
+	}
+
+	/* Since all no longer valid accept list entries have been
+	 * removed, walk through the list of pending connections
+	 * and ensure that any new device gets programmed into
+	 * the controller.
+	 *
+	 * If the list of the devices is larger than the list of
+	 * available accept list entries in the controller, then
+	 * just abort and return filer policy value to not use the
+	 * accept list.
+	 */
+	list_for_each_entry(params, &hdev->pend_le_conns, action) {
+		if (add_to_accept_list(req, params, &num_entries, allow_rpa))
+			return 0x00;
+	}
+
+	/* After adding all new pending connections, walk through
+	 * the list of pending reports and also add these to the
+	 * accept list if there is still space. Abort if space runs out.
+	 */
+	list_for_each_entry(params, &hdev->pend_le_reports, action) {
+		if (add_to_accept_list(req, params, &num_entries, allow_rpa))
+			return 0x00;
+	}
+
+	/* Use the allowlist unless the following conditions are all true:
+	 * - We are not currently suspending
+	 * - There are 1 or more ADV monitors registered
+	 * - Interleaved scanning is not currently using the allowlist
+	 *
+	 * Once the controller offloading of advertisement monitor is in place,
+	 * the above condition should include the support of MSFT extension
+	 * support.
+	 */
+	if (!idr_is_empty(&hdev->adv_monitors_idr) && !hdev->suspended &&
+	    hdev->interleave_scan_state != INTERLEAVE_SCAN_ALLOWLIST)
+		return 0x00;
+
+	/* Select filter policy to use accept list */
+	return 0x01;
+}
+
+static bool scan_use_rpa(struct hci_dev *hdev)
+{
+	return hci_dev_test_flag(hdev, HCI_PRIVACY);
+}
+
+static void hci_req_start_scan(struct hci_request *req, u8 type, u16 interval,
+			       u16 window, u8 own_addr_type, u8 filter_policy,
+			       bool addr_resolv)
+{
+	struct hci_dev *hdev = req->hdev;
+
+	if (hdev->scanning_paused) {
+		bt_dev_dbg(hdev, "Scanning is paused for suspend");
+		return;
+	}
+
+	if (use_ll_privacy(hdev) &&
+	    hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY) &&
+	    addr_resolv) {
+		u8 enable = 0x01;
+
+		hci_req_add(req, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE, 1, &enable);
+	}
+
+	/* Use ext scanning if set ext scan param and ext scan enable is
+	 * supported
+	 */
+	if (use_ext_scan(hdev)) {
+		struct hci_cp_le_set_ext_scan_params *ext_param_cp;
+		struct hci_cp_le_set_ext_scan_enable ext_enable_cp;
+		struct hci_cp_le_scan_phy_params *phy_params;
+		u8 data[sizeof(*ext_param_cp) + sizeof(*phy_params) * 2];
+		u32 plen;
+
+		ext_param_cp = (void *)data;
+		phy_params = (void *)ext_param_cp->data;
+
+		memset(ext_param_cp, 0, sizeof(*ext_param_cp));
+		ext_param_cp->own_addr_type = own_addr_type;
+		ext_param_cp->filter_policy = filter_policy;
+
+		plen = sizeof(*ext_param_cp);
+
+		if (scan_1m(hdev) || scan_2m(hdev)) {
+			ext_param_cp->scanning_phys |= LE_SCAN_PHY_1M;
+
+			memset(phy_params, 0, sizeof(*phy_params));
+			phy_params->type = type;
+			phy_params->interval = cpu_to_le16(interval);
+			phy_params->window = cpu_to_le16(window);
+
+			plen += sizeof(*phy_params);
+			phy_params++;
+		}
+
+		if (scan_coded(hdev)) {
+			ext_param_cp->scanning_phys |= LE_SCAN_PHY_CODED;
+
+			memset(phy_params, 0, sizeof(*phy_params));
+			phy_params->type = type;
+			phy_params->interval = cpu_to_le16(interval);
+			phy_params->window = cpu_to_le16(window);
+
+			plen += sizeof(*phy_params);
+			phy_params++;
+		}
+
+		hci_req_add(req, HCI_OP_LE_SET_EXT_SCAN_PARAMS,
+			    plen, ext_param_cp);
+
+		memset(&ext_enable_cp, 0, sizeof(ext_enable_cp));
+		ext_enable_cp.enable = LE_SCAN_ENABLE;
+		ext_enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
+
+		hci_req_add(req, HCI_OP_LE_SET_EXT_SCAN_ENABLE,
+			    sizeof(ext_enable_cp), &ext_enable_cp);
+	} else {
+		struct hci_cp_le_set_scan_param param_cp;
+		struct hci_cp_le_set_scan_enable enable_cp;
+
+		memset(&param_cp, 0, sizeof(param_cp));
+		param_cp.type = type;
+		param_cp.interval = cpu_to_le16(interval);
+		param_cp.window = cpu_to_le16(window);
+		param_cp.own_address_type = own_addr_type;
+		param_cp.filter_policy = filter_policy;
+		hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(param_cp),
+			    &param_cp);
+
+		memset(&enable_cp, 0, sizeof(enable_cp));
+		enable_cp.enable = LE_SCAN_ENABLE;
+		enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
+		hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(enable_cp),
+			    &enable_cp);
+	}
+}
+
+/* Returns true if an le connection is in the scanning state */
+static inline bool hci_is_le_conn_scanning(struct hci_dev *hdev)
+{
+	struct hci_conn_hash *h = &hdev->conn_hash;
+	struct hci_conn  *c;
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(c, &h->list, list) {
+		if (c->type == LE_LINK && c->state == BT_CONNECT &&
+		    test_bit(HCI_CONN_SCANNING, &c->flags)) {
+			rcu_read_unlock();
+			return true;
+		}
+	}
+
+	rcu_read_unlock();
+
+	return false;
+}
+
+/* Ensure to call hci_req_add_le_scan_disable() first to disable the
+ * controller based address resolution to be able to reconfigure
+ * resolving list.
+ */
+void hci_req_add_le_passive_scan(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+	u8 own_addr_type;
+	u8 filter_policy;
+	u16 window, interval;
+	/* Background scanning should run with address resolution */
+	bool addr_resolv = true;
+
+	if (hdev->scanning_paused) {
+		bt_dev_dbg(hdev, "Scanning is paused for suspend");
+		return;
+	}
+
+	/* Set require_privacy to false since no SCAN_REQ are send
+	 * during passive scanning. Not using an non-resolvable address
+	 * here is important so that peer devices using direct
+	 * advertising with our address will be correctly reported
+	 * by the controller.
+	 */
+	if (hci_update_random_address(req, false, scan_use_rpa(hdev),
+				      &own_addr_type))
+		return;
+
+	if (__hci_update_interleaved_scan(hdev))
+		return;
+
+	bt_dev_dbg(hdev, "interleave state %d", hdev->interleave_scan_state);
+	/* Adding or removing entries from the accept list must
+	 * happen before enabling scanning. The controller does
+	 * not allow accept list modification while scanning.
+	 */
+	filter_policy = update_accept_list(req);
+
+	/* When the controller is using random resolvable addresses and
+	 * with that having LE privacy enabled, then controllers with
+	 * Extended Scanner Filter Policies support can now enable support
+	 * for handling directed advertising.
+	 *
+	 * So instead of using filter polices 0x00 (no accept list)
+	 * and 0x01 (accept list enabled) use the new filter policies
+	 * 0x02 (no accept list) and 0x03 (accept list enabled).
+	 */
+	if (hci_dev_test_flag(hdev, HCI_PRIVACY) &&
+	    (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY))
+		filter_policy |= 0x02;
+
+	if (hdev->suspended) {
+		window = hdev->le_scan_window_suspend;
+		interval = hdev->le_scan_int_suspend;
+	} else if (hci_is_le_conn_scanning(hdev)) {
+		window = hdev->le_scan_window_connect;
+		interval = hdev->le_scan_int_connect;
+	} else if (hci_is_adv_monitoring(hdev)) {
+		window = hdev->le_scan_window_adv_monitor;
+		interval = hdev->le_scan_int_adv_monitor;
+	} else {
+		window = hdev->le_scan_window;
+		interval = hdev->le_scan_interval;
+	}
+
+	bt_dev_dbg(hdev, "LE passive scan with accept list = %d",
+		   filter_policy);
+	hci_req_start_scan(req, LE_SCAN_PASSIVE, interval, window,
+			   own_addr_type, filter_policy, addr_resolv);
+}
+
+static u8 get_adv_instance_scan_rsp_len(struct hci_dev *hdev, u8 instance)
+{
+	struct adv_info *adv_instance;
+
+	/* Instance 0x00 always set local name */
+	if (instance == 0x00)
+		return 1;
+
+	adv_instance = hci_find_adv_instance(hdev, instance);
+	if (!adv_instance)
+		return 0;
+
+	if (adv_instance->flags & MGMT_ADV_FLAG_APPEARANCE ||
+	    adv_instance->flags & MGMT_ADV_FLAG_LOCAL_NAME)
+		return 1;
+
+	return adv_instance->scan_rsp_len;
+}
+
+static void hci_req_clear_event_filter(struct hci_request *req)
+{
+	struct hci_cp_set_event_filter f;
+
+	memset(&f, 0, sizeof(f));
+	f.flt_type = HCI_FLT_CLEAR_ALL;
+	hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &f);
+
+	/* Update page scan state (since we may have modified it when setting
+	 * the event filter).
+	 */
+	__hci_req_update_scan(req);
+}
+
+static void hci_req_set_event_filter(struct hci_request *req)
+{
+	struct bdaddr_list_with_flags *b;
+	struct hci_cp_set_event_filter f;
+	struct hci_dev *hdev = req->hdev;
+	u8 scan = SCAN_DISABLED;
+
+	/* Always clear event filter when starting */
+	hci_req_clear_event_filter(req);
+
+	list_for_each_entry(b, &hdev->accept_list, list) {
+		if (!hci_conn_test_flag(HCI_CONN_FLAG_REMOTE_WAKEUP,
+					b->current_flags))
+			continue;
+
+		memset(&f, 0, sizeof(f));
+		bacpy(&f.addr_conn_flt.bdaddr, &b->bdaddr);
+		f.flt_type = HCI_FLT_CONN_SETUP;
+		f.cond_type = HCI_CONN_SETUP_ALLOW_BDADDR;
+		f.addr_conn_flt.auto_accept = HCI_CONN_SETUP_AUTO_ON;
+
+		bt_dev_dbg(hdev, "Adding event filters for %pMR", &b->bdaddr);
+		hci_req_add(req, HCI_OP_SET_EVENT_FLT, sizeof(f), &f);
+		scan = SCAN_PAGE;
+	}
+
+	hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
+}
+
+static void hci_req_config_le_suspend_scan(struct hci_request *req)
+{
+	/* Before changing params disable scan if enabled */
+	if (hci_dev_test_flag(req->hdev, HCI_LE_SCAN))
+		hci_req_add_le_scan_disable(req, false);
+
+	/* Configure params and enable scanning */
+	hci_req_add_le_passive_scan(req);
+
+	/* Block suspend notifier on response */
+	set_bit(SUSPEND_SCAN_ENABLE, req->hdev->suspend_tasks);
+}
+
+static void cancel_adv_timeout(struct hci_dev *hdev)
+{
+	if (hdev->adv_instance_timeout) {
+		hdev->adv_instance_timeout = 0;
+		cancel_delayed_work(&hdev->adv_instance_expire);
+	}
+}
+
+/* This function requires the caller holds hdev->lock */
+static void hci_suspend_adv_instances(struct hci_request *req)
+{
+	bt_dev_dbg(req->hdev, "Suspending advertising instances");
+
+	/* Call to disable any advertisements active on the controller.
+	 * This will succeed even if no advertisements are configured.
+	 */
+	__hci_req_disable_advertising(req);
+
+	/* If we are using software rotation, pause the loop */
+	if (!ext_adv_capable(req->hdev))
+		cancel_adv_timeout(req->hdev);
+}
+
+/* This function requires the caller holds hdev->lock */
+static void hci_resume_adv_instances(struct hci_request *req)
+{
+	struct adv_info *adv;
+
+	bt_dev_dbg(req->hdev, "Resuming advertising instances");
+
+	if (ext_adv_capable(req->hdev)) {
+		/* Call for each tracked instance to be re-enabled */
+		list_for_each_entry(adv, &req->hdev->adv_instances, list) {
+			__hci_req_enable_ext_advertising(req,
+							 adv->instance);
+		}
+
+	} else {
+		/* Schedule for most recent instance to be restarted and begin
+		 * the software rotation loop
+		 */
+		__hci_req_schedule_adv_instance(req,
+						req->hdev->cur_adv_instance,
+						true);
+	}
+}
+
+static void suspend_req_complete(struct hci_dev *hdev, u8 status, u16 opcode)
+{
+	bt_dev_dbg(hdev, "Request complete opcode=0x%x, status=0x%x", opcode,
+		   status);
+	if (test_and_clear_bit(SUSPEND_SCAN_ENABLE, hdev->suspend_tasks) ||
+	    test_and_clear_bit(SUSPEND_SCAN_DISABLE, hdev->suspend_tasks)) {
+		wake_up(&hdev->suspend_wait_q);
+	}
+}
+
+/* Call with hci_dev_lock */
+void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next)
+{
+	int old_state;
+	struct hci_conn *conn;
+	struct hci_request req;
+	u8 page_scan;
+	int disconnect_counter;
+
+	if (next == hdev->suspend_state) {
+		bt_dev_dbg(hdev, "Same state before and after: %d", next);
+		goto done;
+	}
+
+	hdev->suspend_state = next;
+	hci_req_init(&req, hdev);
+
+	if (next == BT_SUSPEND_DISCONNECT) {
+		/* Mark device as suspended */
+		hdev->suspended = true;
+
+		/* Pause discovery if not already stopped */
+		old_state = hdev->discovery.state;
+		if (old_state != DISCOVERY_STOPPED) {
+			set_bit(SUSPEND_PAUSE_DISCOVERY, hdev->suspend_tasks);
+			hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
+			queue_work(hdev->req_workqueue, &hdev->discov_update);
+		}
+
+		hdev->discovery_paused = true;
+		hdev->discovery_old_state = old_state;
+
+		/* Stop directed advertising */
+		old_state = hci_dev_test_flag(hdev, HCI_ADVERTISING);
+		if (old_state) {
+			set_bit(SUSPEND_PAUSE_ADVERTISING, hdev->suspend_tasks);
+			cancel_delayed_work(&hdev->discov_off);
+			queue_delayed_work(hdev->req_workqueue,
+					   &hdev->discov_off, 0);
+		}
+
+		/* Pause other advertisements */
+		if (hdev->adv_instance_cnt)
+			hci_suspend_adv_instances(&req);
+
+		hdev->advertising_paused = true;
+		hdev->advertising_old_state = old_state;
+		/* Disable page scan */
+		page_scan = SCAN_DISABLED;
+		hci_req_add(&req, HCI_OP_WRITE_SCAN_ENABLE, 1, &page_scan);
+
+		/* Disable LE passive scan if enabled */
+		if (hci_dev_test_flag(hdev, HCI_LE_SCAN))
+			hci_req_add_le_scan_disable(&req, false);
+
+		/* Mark task needing completion */
+		set_bit(SUSPEND_SCAN_DISABLE, hdev->suspend_tasks);
+
+		/* Prevent disconnects from causing scanning to be re-enabled */
+		hdev->scanning_paused = true;
+
+		/* Run commands before disconnecting */
+		hci_req_run(&req, suspend_req_complete);
+
+		disconnect_counter = 0;
+		/* Soft disconnect everything (power off) */
+		list_for_each_entry(conn, &hdev->conn_hash.list, list) {
+			hci_disconnect(conn, HCI_ERROR_REMOTE_POWER_OFF);
+			disconnect_counter++;
+		}
+
+		if (disconnect_counter > 0) {
+			bt_dev_dbg(hdev,
+				   "Had %d disconnects. Will wait on them",
+				   disconnect_counter);
+			set_bit(SUSPEND_DISCONNECTING, hdev->suspend_tasks);
+		}
+	} else if (next == BT_SUSPEND_CONFIGURE_WAKE) {
+		/* Unpause to take care of updating scanning params */
+		hdev->scanning_paused = false;
+		/* Enable event filter for paired devices */
+		hci_req_set_event_filter(&req);
+		/* Enable passive scan at lower duty cycle */
+		hci_req_config_le_suspend_scan(&req);
+		/* Pause scan changes again. */
+		hdev->scanning_paused = true;
+		hci_req_run(&req, suspend_req_complete);
+	} else {
+		hdev->suspended = false;
+		hdev->scanning_paused = false;
+
+		hci_req_clear_event_filter(&req);
+		/* Reset passive/background scanning to normal */
+		hci_req_config_le_suspend_scan(&req);
+
+		/* Unpause directed advertising */
+		hdev->advertising_paused = false;
+		if (hdev->advertising_old_state) {
+			set_bit(SUSPEND_UNPAUSE_ADVERTISING,
+				hdev->suspend_tasks);
+			hci_dev_set_flag(hdev, HCI_ADVERTISING);
+			queue_work(hdev->req_workqueue,
+				   &hdev->discoverable_update);
+			hdev->advertising_old_state = 0;
+		}
+
+		/* Resume other advertisements */
+		if (hdev->adv_instance_cnt)
+			hci_resume_adv_instances(&req);
+
+		/* Unpause discovery */
+		hdev->discovery_paused = false;
+		if (hdev->discovery_old_state != DISCOVERY_STOPPED &&
+		    hdev->discovery_old_state != DISCOVERY_STOPPING) {
+			set_bit(SUSPEND_UNPAUSE_DISCOVERY, hdev->suspend_tasks);
+			hci_discovery_set_state(hdev, DISCOVERY_STARTING);
+			queue_work(hdev->req_workqueue, &hdev->discov_update);
+		}
+
+		hci_req_run(&req, suspend_req_complete);
+	}
+
+	hdev->suspend_state = next;
+
+done:
+	clear_bit(SUSPEND_PREPARE_NOTIFIER, hdev->suspend_tasks);
+	wake_up(&hdev->suspend_wait_q);
+}
+
+static u8 get_cur_adv_instance_scan_rsp_len(struct hci_dev *hdev)
+{
+	u8 instance = hdev->cur_adv_instance;
+	struct adv_info *adv_instance;
+
+	/* Instance 0x00 always set local name */
+	if (instance == 0x00)
+		return 1;
+
+	adv_instance = hci_find_adv_instance(hdev, instance);
+	if (!adv_instance)
+		return 0;
+
+	/* TODO: Take into account the "appearance" and "local-name" flags here.
+	 * These are currently being ignored as they are not supported.
+	 */
+	return adv_instance->scan_rsp_len;
+}
+
+void __hci_req_disable_advertising(struct hci_request *req)
+{
+	if (ext_adv_capable(req->hdev)) {
+		__hci_req_disable_ext_adv_instance(req, 0x00);
+
+	} else {
+		u8 enable = 0x00;
+
+		hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable);
+	}
+}
+
+static u32 get_adv_instance_flags(struct hci_dev *hdev, u8 instance)
+{
+	u32 flags;
+	struct adv_info *adv_instance;
+
+	if (instance == 0x00) {
+		/* Instance 0 always manages the "Tx Power" and "Flags"
+		 * fields
+		 */
+		flags = MGMT_ADV_FLAG_TX_POWER | MGMT_ADV_FLAG_MANAGED_FLAGS;
+
+		/* For instance 0, the HCI_ADVERTISING_CONNECTABLE setting
+		 * corresponds to the "connectable" instance flag.
+		 */
+		if (hci_dev_test_flag(hdev, HCI_ADVERTISING_CONNECTABLE))
+			flags |= MGMT_ADV_FLAG_CONNECTABLE;
+
+		if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
+			flags |= MGMT_ADV_FLAG_LIMITED_DISCOV;
+		else if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
+			flags |= MGMT_ADV_FLAG_DISCOV;
+
+		return flags;
+	}
+
+	adv_instance = hci_find_adv_instance(hdev, instance);
+
+	/* Return 0 when we got an invalid instance identifier. */
+	if (!adv_instance)
+		return 0;
+
+	return adv_instance->flags;
+}
+
+static bool adv_use_rpa(struct hci_dev *hdev, uint32_t flags)
+{
+	/* If privacy is not enabled don't use RPA */
+	if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
+		return false;
+
+	/* If basic privacy mode is enabled use RPA */
+	if (!hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
+		return true;
+
+	/* If limited privacy mode is enabled don't use RPA if we're
+	 * both discoverable and bondable.
+	 */
+	if ((flags & MGMT_ADV_FLAG_DISCOV) &&
+	    hci_dev_test_flag(hdev, HCI_BONDABLE))
+		return false;
+
+	/* We're neither bondable nor discoverable in the limited
+	 * privacy mode, therefore use RPA.
+	 */
+	return true;
+}
+
+static bool is_advertising_allowed(struct hci_dev *hdev, bool connectable)
+{
+	/* If there is no connection we are OK to advertise. */
+	if (hci_conn_num(hdev, LE_LINK) == 0)
+		return true;
+
+	/* Check le_states if there is any connection in slave role. */
+	if (hdev->conn_hash.le_num_slave > 0) {
+		/* Slave connection state and non connectable mode bit 20. */
+		if (!connectable && !(hdev->le_states[2] & 0x10))
+			return false;
+
+		/* Slave connection state and connectable mode bit 38
+		 * and scannable bit 21.
+		 */
+		if (connectable && (!(hdev->le_states[4] & 0x40) ||
+				    !(hdev->le_states[2] & 0x20)))
+			return false;
+	}
+
+	/* Check le_states if there is any connection in master role. */
+	if (hci_conn_num(hdev, LE_LINK) != hdev->conn_hash.le_num_slave) {
+		/* Master connection state and non connectable mode bit 18. */
+		if (!connectable && !(hdev->le_states[2] & 0x02))
+			return false;
+
+		/* Master connection state and connectable mode bit 35 and
+		 * scannable 19.
+		 */
+		if (connectable && (!(hdev->le_states[4] & 0x08) ||
+				    !(hdev->le_states[2] & 0x08)))
+			return false;
+	}
+
+	return true;
+}
+
+void __hci_req_enable_advertising(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct hci_cp_le_set_adv_param cp;
+	u8 own_addr_type, enable = 0x01;
+	bool connectable;
+	u16 adv_min_interval, adv_max_interval;
+	u32 flags;
+
+	flags = get_adv_instance_flags(hdev, hdev->cur_adv_instance);
+
+	/* If the "connectable" instance flag was not set, then choose between
+	 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
+	 */
+	connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
+		      mgmt_get_connectable(hdev);
+
+	if (!is_advertising_allowed(hdev, connectable))
+		return;
+
+	if (hci_dev_test_flag(hdev, HCI_LE_ADV))
+		__hci_req_disable_advertising(req);
+
+	/* Clear the HCI_LE_ADV bit temporarily so that the
+	 * hci_update_random_address knows that it's safe to go ahead
+	 * and write a new random address. The flag will be set back on
+	 * as soon as the SET_ADV_ENABLE HCI command completes.
+	 */
+	hci_dev_clear_flag(hdev, HCI_LE_ADV);
+
+	/* Set require_privacy to true only when non-connectable
+	 * advertising is used. In that case it is fine to use a
+	 * non-resolvable private address.
+	 */
+	if (hci_update_random_address(req, !connectable,
+				      adv_use_rpa(hdev, flags),
+				      &own_addr_type) < 0)
+		return;
+
+	memset(&cp, 0, sizeof(cp));
+
+	if (connectable) {
+		cp.type = LE_ADV_IND;
+
+		adv_min_interval = hdev->le_adv_min_interval;
+		adv_max_interval = hdev->le_adv_max_interval;
+	} else {
+		if (get_cur_adv_instance_scan_rsp_len(hdev))
+			cp.type = LE_ADV_SCAN_IND;
+		else
+			cp.type = LE_ADV_NONCONN_IND;
+
+		if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE) ||
+		    hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
+			adv_min_interval = DISCOV_LE_FAST_ADV_INT_MIN;
+			adv_max_interval = DISCOV_LE_FAST_ADV_INT_MAX;
+		} else {
+			adv_min_interval = hdev->le_adv_min_interval;
+			adv_max_interval = hdev->le_adv_max_interval;
+		}
+	}
+
+	cp.min_interval = cpu_to_le16(adv_min_interval);
+	cp.max_interval = cpu_to_le16(adv_max_interval);
+	cp.own_address_type = own_addr_type;
+	cp.channel_map = hdev->le_adv_channel_map;
+
+	hci_req_add(req, HCI_OP_LE_SET_ADV_PARAM, sizeof(cp), &cp);
+
+	hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable);
+}
+
+u8 append_local_name(struct hci_dev *hdev, u8 *ptr, u8 ad_len)
+{
+	size_t short_len;
+	size_t complete_len;
+
+	/* no space left for name (+ NULL + type + len) */
+	if ((HCI_MAX_AD_LENGTH - ad_len) < HCI_MAX_SHORT_NAME_LENGTH + 3)
+		return ad_len;
+
+	/* use complete name if present and fits */
+	complete_len = strlen(hdev->dev_name);
+	if (complete_len && complete_len <= HCI_MAX_SHORT_NAME_LENGTH)
+		return eir_append_data(ptr, ad_len, EIR_NAME_COMPLETE,
+				       hdev->dev_name, complete_len + 1);
+
+	/* use short name if present */
+	short_len = strlen(hdev->short_name);
+	if (short_len)
+		return eir_append_data(ptr, ad_len, EIR_NAME_SHORT,
+				       hdev->short_name, short_len + 1);
+
+	/* use shortened full name if present, we already know that name
+	 * is longer then HCI_MAX_SHORT_NAME_LENGTH
+	 */
+	if (complete_len) {
+		u8 name[HCI_MAX_SHORT_NAME_LENGTH + 1];
+
+		memcpy(name, hdev->dev_name, HCI_MAX_SHORT_NAME_LENGTH);
+		name[HCI_MAX_SHORT_NAME_LENGTH] = '\0';
+
+		return eir_append_data(ptr, ad_len, EIR_NAME_SHORT, name,
+				       sizeof(name));
+	}
+
+	return ad_len;
+}
+
+static u8 append_appearance(struct hci_dev *hdev, u8 *ptr, u8 ad_len)
+{
+	return eir_append_le16(ptr, ad_len, EIR_APPEARANCE, hdev->appearance);
+}
+
+static u8 create_default_scan_rsp_data(struct hci_dev *hdev, u8 *ptr)
+{
+	u8 scan_rsp_len = 0;
+
+	if (hdev->appearance) {
+		scan_rsp_len = append_appearance(hdev, ptr, scan_rsp_len);
+	}
+
+	return append_local_name(hdev, ptr, scan_rsp_len);
+}
+
+static u8 create_instance_scan_rsp_data(struct hci_dev *hdev, u8 instance,
+					u8 *ptr)
+{
+	struct adv_info *adv_instance;
+	u32 instance_flags;
+	u8 scan_rsp_len = 0;
+
+	adv_instance = hci_find_adv_instance(hdev, instance);
+	if (!adv_instance)
+		return 0;
+
+	instance_flags = adv_instance->flags;
+
+	if ((instance_flags & MGMT_ADV_FLAG_APPEARANCE) && hdev->appearance) {
+		scan_rsp_len = append_appearance(hdev, ptr, scan_rsp_len);
+	}
+
+	memcpy(&ptr[scan_rsp_len], adv_instance->scan_rsp_data,
+	       adv_instance->scan_rsp_len);
+
+	scan_rsp_len += adv_instance->scan_rsp_len;
+
+	if (instance_flags & MGMT_ADV_FLAG_LOCAL_NAME)
+		scan_rsp_len = append_local_name(hdev, ptr, scan_rsp_len);
+
+	return scan_rsp_len;
+}
+
+void __hci_req_update_scan_rsp_data(struct hci_request *req, u8 instance)
+{
+	struct hci_dev *hdev = req->hdev;
+	u8 len;
+
+	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
+		return;
+
+	if (ext_adv_capable(hdev)) {
+		struct {
+			struct hci_cp_le_set_ext_scan_rsp_data cp;
+			u8 data[HCI_MAX_EXT_AD_LENGTH];
+		} pdu;
+
+		memset(&pdu, 0, sizeof(pdu));
+
+		if (instance)
+			len = create_instance_scan_rsp_data(hdev, instance,
+							    pdu.data);
+		else
+			len = create_default_scan_rsp_data(hdev, pdu.data);
+
+		if (hdev->scan_rsp_data_len == len &&
+		    !memcmp(pdu.data, hdev->scan_rsp_data, len))
+			return;
+
+		memcpy(hdev->scan_rsp_data, pdu.data, len);
+		hdev->scan_rsp_data_len = len;
+
+		pdu.cp.handle = instance;
+		pdu.cp.length = len;
+		pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
+		pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
+
+		hci_req_add(req, HCI_OP_LE_SET_EXT_SCAN_RSP_DATA,
+			    sizeof(pdu.cp) + len, &pdu.cp);
+	} else {
+		struct hci_cp_le_set_scan_rsp_data cp;
+
+		memset(&cp, 0, sizeof(cp));
+
+		if (instance)
+			len = create_instance_scan_rsp_data(hdev, instance,
+							    cp.data);
+		else
+			len = create_default_scan_rsp_data(hdev, cp.data);
+
+		if (hdev->scan_rsp_data_len == len &&
+		    !memcmp(cp.data, hdev->scan_rsp_data, len))
+			return;
+
+		memcpy(hdev->scan_rsp_data, cp.data, sizeof(cp.data));
+		hdev->scan_rsp_data_len = len;
+
+		cp.length = len;
+
+		hci_req_add(req, HCI_OP_LE_SET_SCAN_RSP_DATA, sizeof(cp), &cp);
+	}
+}
+
+static u8 create_instance_adv_data(struct hci_dev *hdev, u8 instance, u8 *ptr)
+{
+	struct adv_info *adv_instance = NULL;
+	u8 ad_len = 0, flags = 0;
+	u32 instance_flags;
+
+	/* Return 0 when the current instance identifier is invalid. */
+	if (instance) {
+		adv_instance = hci_find_adv_instance(hdev, instance);
+		if (!adv_instance)
+			return 0;
+	}
+
+	instance_flags = get_adv_instance_flags(hdev, instance);
+
+	/* If instance already has the flags set skip adding it once
+	 * again.
+	 */
+	if (adv_instance && eir_get_data(adv_instance->adv_data,
+					 adv_instance->adv_data_len, EIR_FLAGS,
+					 NULL))
+		goto skip_flags;
+
+	/* The Add Advertising command allows userspace to set both the general
+	 * and limited discoverable flags.
+	 */
+	if (instance_flags & MGMT_ADV_FLAG_DISCOV)
+		flags |= LE_AD_GENERAL;
+
+	if (instance_flags & MGMT_ADV_FLAG_LIMITED_DISCOV)
+		flags |= LE_AD_LIMITED;
+
+	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
+		flags |= LE_AD_NO_BREDR;
+
+	if (flags || (instance_flags & MGMT_ADV_FLAG_MANAGED_FLAGS)) {
+		/* If a discovery flag wasn't provided, simply use the global
+		 * settings.
+		 */
+		if (!flags)
+			flags |= mgmt_get_adv_discov_flags(hdev);
+
+		/* If flags would still be empty, then there is no need to
+		 * include the "Flags" AD field".
+		 */
+		if (flags) {
+			ptr[0] = 0x02;
+			ptr[1] = EIR_FLAGS;
+			ptr[2] = flags;
+
+			ad_len += 3;
+			ptr += 3;
+		}
+	}
+
+skip_flags:
+	if (adv_instance) {
+		memcpy(ptr, adv_instance->adv_data,
+		       adv_instance->adv_data_len);
+		ad_len += adv_instance->adv_data_len;
+		ptr += adv_instance->adv_data_len;
+	}
+
+	if (instance_flags & MGMT_ADV_FLAG_TX_POWER) {
+		s8 adv_tx_power;
+
+		if (ext_adv_capable(hdev)) {
+			if (adv_instance)
+				adv_tx_power = adv_instance->tx_power;
+			else
+				adv_tx_power = hdev->adv_tx_power;
+		} else {
+			adv_tx_power = hdev->adv_tx_power;
+		}
+
+		/* Provide Tx Power only if we can provide a valid value for it */
+		if (adv_tx_power != HCI_TX_POWER_INVALID) {
+			ptr[0] = 0x02;
+			ptr[1] = EIR_TX_POWER;
+			ptr[2] = (u8)adv_tx_power;
+
+			ad_len += 3;
+			ptr += 3;
+		}
+	}
+
+	return ad_len;
+}
+
+void __hci_req_update_adv_data(struct hci_request *req, u8 instance)
+{
+	struct hci_dev *hdev = req->hdev;
+	u8 len;
+
+	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
+		return;
+
+	if (ext_adv_capable(hdev)) {
+		struct {
+			struct hci_cp_le_set_ext_adv_data cp;
+			u8 data[HCI_MAX_EXT_AD_LENGTH];
+		} pdu;
+
+		memset(&pdu, 0, sizeof(pdu));
+
+		len = create_instance_adv_data(hdev, instance, pdu.data);
+
+		/* There's nothing to do if the data hasn't changed */
+		if (hdev->adv_data_len == len &&
+		    memcmp(pdu.data, hdev->adv_data, len) == 0)
+			return;
+
+		memcpy(hdev->adv_data, pdu.data, len);
+		hdev->adv_data_len = len;
+
+		pdu.cp.length = len;
+		pdu.cp.handle = instance;
+		pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
+		pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
+
+		hci_req_add(req, HCI_OP_LE_SET_EXT_ADV_DATA,
+			    sizeof(pdu.cp) + len, &pdu.cp);
+	} else {
+		struct hci_cp_le_set_adv_data cp;
+
+		memset(&cp, 0, sizeof(cp));
+
+		len = create_instance_adv_data(hdev, instance, cp.data);
+
+		/* There's nothing to do if the data hasn't changed */
+		if (hdev->adv_data_len == len &&
+		    memcmp(cp.data, hdev->adv_data, len) == 0)
+			return;
+
+		memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
+		hdev->adv_data_len = len;
+
+		cp.length = len;
+
+		hci_req_add(req, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
+	}
+}
+
+int hci_req_update_adv_data(struct hci_dev *hdev, u8 instance)
+{
+	struct hci_request req;
+
+	hci_req_init(&req, hdev);
+	__hci_req_update_adv_data(&req, instance);
+
+	return hci_req_run(&req, NULL);
+}
+
+static void enable_addr_resolution_complete(struct hci_dev *hdev, u8 status,
+					    u16 opcode)
+{
+	BT_DBG("%s status %u", hdev->name, status);
+}
+
+void hci_req_disable_address_resolution(struct hci_dev *hdev)
+{
+	struct hci_request req;
+	__u8 enable = 0x00;
+
+	if (!use_ll_privacy(hdev) &&
+	    !hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
+		return;
+
+	hci_req_init(&req, hdev);
+
+	hci_req_add(&req, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE, 1, &enable);
+
+	hci_req_run(&req, enable_addr_resolution_complete);
+}
+
+static void adv_enable_complete(struct hci_dev *hdev, u8 status, u16 opcode)
+{
+	BT_DBG("%s status %u", hdev->name, status);
+}
+
+void hci_req_reenable_advertising(struct hci_dev *hdev)
+{
+	struct hci_request req;
+
+	if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
+	    list_empty(&hdev->adv_instances))
+		return;
+
+	hci_req_init(&req, hdev);
+
+	if (hdev->cur_adv_instance) {
+		__hci_req_schedule_adv_instance(&req, hdev->cur_adv_instance,
+						true);
+	} else {
+		if (ext_adv_capable(hdev)) {
+			__hci_req_start_ext_adv(&req, 0x00);
+		} else {
+			__hci_req_update_adv_data(&req, 0x00);
+			__hci_req_update_scan_rsp_data(&req, 0x00);
+			__hci_req_enable_advertising(&req);
+		}
+	}
+
+	hci_req_run(&req, adv_enable_complete);
+}
+
+static void adv_timeout_expire(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev,
+					    adv_instance_expire.work);
+
+	struct hci_request req;
+	u8 instance;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	hdev->adv_instance_timeout = 0;
+
+	instance = hdev->cur_adv_instance;
+	if (instance == 0x00)
+		goto unlock;
+
+	hci_req_init(&req, hdev);
+
+	hci_req_clear_adv_instance(hdev, NULL, &req, instance, false);
+
+	if (list_empty(&hdev->adv_instances))
+		__hci_req_disable_advertising(&req);
+
+	hci_req_run(&req, NULL);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int hci_req_add_le_interleaved_scan(struct hci_request *req,
+					   unsigned long opt)
+{
+	struct hci_dev *hdev = req->hdev;
+	int ret = 0;
+
+	hci_dev_lock(hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_LE_SCAN))
+		hci_req_add_le_scan_disable(req, false);
+	hci_req_add_le_passive_scan(req);
+
+	switch (hdev->interleave_scan_state) {
+	case INTERLEAVE_SCAN_ALLOWLIST:
+		bt_dev_dbg(hdev, "next state: allowlist");
+		hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
+		break;
+	case INTERLEAVE_SCAN_NO_FILTER:
+		bt_dev_dbg(hdev, "next state: no filter");
+		hdev->interleave_scan_state = INTERLEAVE_SCAN_ALLOWLIST;
+		break;
+	case INTERLEAVE_SCAN_NONE:
+		BT_ERR("unexpected error");
+		ret = -1;
+	}
+
+	hci_dev_unlock(hdev);
+
+	return ret;
+}
+
+static void interleave_scan_work(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev,
+					    interleave_scan.work);
+	u8 status;
+	unsigned long timeout;
+
+	if (hdev->interleave_scan_state == INTERLEAVE_SCAN_ALLOWLIST) {
+		timeout = msecs_to_jiffies(hdev->advmon_allowlist_duration);
+	} else if (hdev->interleave_scan_state == INTERLEAVE_SCAN_NO_FILTER) {
+		timeout = msecs_to_jiffies(hdev->advmon_no_filter_duration);
+	} else {
+		bt_dev_err(hdev, "unexpected error");
+		return;
+	}
+
+	hci_req_sync(hdev, hci_req_add_le_interleaved_scan, 0,
+		     HCI_CMD_TIMEOUT, &status);
+
+	/* Don't continue interleaving if it was canceled */
+	if (is_interleave_scanning(hdev))
+		queue_delayed_work(hdev->req_workqueue,
+				   &hdev->interleave_scan, timeout);
+}
+
+int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
+			   bool use_rpa, struct adv_info *adv_instance,
+			   u8 *own_addr_type, bdaddr_t *rand_addr)
+{
+	int err;
+
+	bacpy(rand_addr, BDADDR_ANY);
+
+	/* If privacy is enabled use a resolvable private address. If
+	 * current RPA has expired then generate a new one.
+	 */
+	if (use_rpa) {
+		int to;
+
+		/* If Controller supports LL Privacy use own address type is
+		 * 0x03
+		 */
+		if (use_ll_privacy(hdev))
+			*own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
+		else
+			*own_addr_type = ADDR_LE_DEV_RANDOM;
+
+		if (adv_instance) {
+			if (!adv_instance->rpa_expired &&
+			    !bacmp(&adv_instance->random_addr, &hdev->rpa))
+				return 0;
+
+			adv_instance->rpa_expired = false;
+		} else {
+			if (!hci_dev_test_and_clear_flag(hdev, HCI_RPA_EXPIRED) &&
+			    !bacmp(&hdev->random_addr, &hdev->rpa))
+				return 0;
+		}
+
+		err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
+		if (err < 0) {
+			bt_dev_err(hdev, "failed to generate new RPA");
+			return err;
+		}
+
+		bacpy(rand_addr, &hdev->rpa);
+
+		to = msecs_to_jiffies(hdev->rpa_timeout * 1000);
+		if (adv_instance)
+			queue_delayed_work(hdev->workqueue,
+					   &adv_instance->rpa_expired_cb, to);
+		else
+			queue_delayed_work(hdev->workqueue,
+					   &hdev->rpa_expired, to);
+
+		return 0;
+	}
+
+	/* In case of required privacy without resolvable private address,
+	 * use an non-resolvable private address. This is useful for
+	 * non-connectable advertising.
+	 */
+	if (require_privacy) {
+		bdaddr_t nrpa;
+
+		while (true) {
+			/* The non-resolvable private address is generated
+			 * from random six bytes with the two most significant
+			 * bits cleared.
+			 */
+			get_random_bytes(&nrpa, 6);
+			nrpa.b[5] &= 0x3f;
+
+			/* The non-resolvable private address shall not be
+			 * equal to the public address.
+			 */
+			if (bacmp(&hdev->bdaddr, &nrpa))
+				break;
+		}
+
+		*own_addr_type = ADDR_LE_DEV_RANDOM;
+		bacpy(rand_addr, &nrpa);
+
+		return 0;
+	}
+
+	/* No privacy so use a public address. */
+	*own_addr_type = ADDR_LE_DEV_PUBLIC;
+
+	return 0;
+}
+
+void __hci_req_clear_ext_adv_sets(struct hci_request *req)
+{
+	hci_req_add(req, HCI_OP_LE_CLEAR_ADV_SETS, 0, NULL);
+}
+
+int __hci_req_setup_ext_adv_instance(struct hci_request *req, u8 instance)
+{
+	struct hci_cp_le_set_ext_adv_params cp;
+	struct hci_dev *hdev = req->hdev;
+	bool connectable;
+	u32 flags;
+	bdaddr_t random_addr;
+	u8 own_addr_type;
+	int err;
+	struct adv_info *adv_instance;
+	bool secondary_adv;
+
+	if (instance > 0) {
+		adv_instance = hci_find_adv_instance(hdev, instance);
+		if (!adv_instance)
+			return -EINVAL;
+	} else {
+		adv_instance = NULL;
+	}
+
+	flags = get_adv_instance_flags(hdev, instance);
+
+	/* If the "connectable" instance flag was not set, then choose between
+	 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
+	 */
+	connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
+		      mgmt_get_connectable(hdev);
+
+	if (!is_advertising_allowed(hdev, connectable))
+		return -EPERM;
+
+	/* Set require_privacy to true only when non-connectable
+	 * advertising is used. In that case it is fine to use a
+	 * non-resolvable private address.
+	 */
+	err = hci_get_random_address(hdev, !connectable,
+				     adv_use_rpa(hdev, flags), adv_instance,
+				     &own_addr_type, &random_addr);
+	if (err < 0)
+		return err;
+
+	memset(&cp, 0, sizeof(cp));
+
+	/* In ext adv set param interval is 3 octets */
+	hci_cpu_to_le24(hdev->le_adv_min_interval, cp.min_interval);
+	hci_cpu_to_le24(hdev->le_adv_max_interval, cp.max_interval);
+
+	secondary_adv = (flags & MGMT_ADV_FLAG_SEC_MASK);
+
+	if (connectable) {
+		if (secondary_adv)
+			cp.evt_properties = cpu_to_le16(LE_EXT_ADV_CONN_IND);
+		else
+			cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_IND);
+	} else if (get_adv_instance_scan_rsp_len(hdev, instance)) {
+		if (secondary_adv)
+			cp.evt_properties = cpu_to_le16(LE_EXT_ADV_SCAN_IND);
+		else
+			cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_SCAN_IND);
+	} else {
+		if (secondary_adv)
+			cp.evt_properties = cpu_to_le16(LE_EXT_ADV_NON_CONN_IND);
+		else
+			cp.evt_properties = cpu_to_le16(LE_LEGACY_NONCONN_IND);
+	}
+
+	cp.own_addr_type = own_addr_type;
+	cp.channel_map = hdev->le_adv_channel_map;
+	cp.tx_power = 127;
+	cp.handle = instance;
+
+	if (flags & MGMT_ADV_FLAG_SEC_2M) {
+		cp.primary_phy = HCI_ADV_PHY_1M;
+		cp.secondary_phy = HCI_ADV_PHY_2M;
+	} else if (flags & MGMT_ADV_FLAG_SEC_CODED) {
+		cp.primary_phy = HCI_ADV_PHY_CODED;
+		cp.secondary_phy = HCI_ADV_PHY_CODED;
+	} else {
+		/* In all other cases use 1M */
+		cp.primary_phy = HCI_ADV_PHY_1M;
+		cp.secondary_phy = HCI_ADV_PHY_1M;
+	}
+
+	hci_req_add(req, HCI_OP_LE_SET_EXT_ADV_PARAMS, sizeof(cp), &cp);
+
+	if (own_addr_type == ADDR_LE_DEV_RANDOM &&
+	    bacmp(&random_addr, BDADDR_ANY)) {
+		struct hci_cp_le_set_adv_set_rand_addr cp;
+
+		/* Check if random address need to be updated */
+		if (adv_instance) {
+			if (!bacmp(&random_addr, &adv_instance->random_addr))
+				return 0;
+		} else {
+			if (!bacmp(&random_addr, &hdev->random_addr))
+				return 0;
+		}
+
+		memset(&cp, 0, sizeof(cp));
+
+		cp.handle = instance;
+		bacpy(&cp.bdaddr, &random_addr);
+
+		hci_req_add(req,
+			    HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
+			    sizeof(cp), &cp);
+	}
+
+	return 0;
+}
+
+int __hci_req_enable_ext_advertising(struct hci_request *req, u8 instance)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct hci_cp_le_set_ext_adv_enable *cp;
+	struct hci_cp_ext_adv_set *adv_set;
+	u8 data[sizeof(*cp) + sizeof(*adv_set) * 1];
+	struct adv_info *adv_instance;
+
+	if (instance > 0) {
+		adv_instance = hci_find_adv_instance(hdev, instance);
+		if (!adv_instance)
+			return -EINVAL;
+	} else {
+		adv_instance = NULL;
+	}
+
+	cp = (void *) data;
+	adv_set = (void *) cp->data;
+
+	memset(cp, 0, sizeof(*cp));
+
+	cp->enable = 0x01;
+	cp->num_of_sets = 0x01;
+
+	memset(adv_set, 0, sizeof(*adv_set));
+
+	adv_set->handle = instance;
+
+	/* Set duration per instance since controller is responsible for
+	 * scheduling it.
+	 */
+	if (adv_instance && adv_instance->timeout) {
+		u16 duration = adv_instance->timeout * MSEC_PER_SEC;
+
+		/* Time = N * 10 ms */
+		adv_set->duration = cpu_to_le16(duration / 10);
+	}
+
+	hci_req_add(req, HCI_OP_LE_SET_EXT_ADV_ENABLE,
+		    sizeof(*cp) + sizeof(*adv_set) * cp->num_of_sets,
+		    data);
+
+	return 0;
+}
+
+int __hci_req_disable_ext_adv_instance(struct hci_request *req, u8 instance)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct hci_cp_le_set_ext_adv_enable *cp;
+	struct hci_cp_ext_adv_set *adv_set;
+	u8 data[sizeof(*cp) + sizeof(*adv_set) * 1];
+	u8 req_size;
+
+	/* If request specifies an instance that doesn't exist, fail */
+	if (instance > 0 && !hci_find_adv_instance(hdev, instance))
+		return -EINVAL;
+
+	memset(data, 0, sizeof(data));
+
+	cp = (void *)data;
+	adv_set = (void *)cp->data;
+
+	/* Instance 0x00 indicates all advertising instances will be disabled */
+	cp->num_of_sets = !!instance;
+	cp->enable = 0x00;
+
+	adv_set->handle = instance;
+
+	req_size = sizeof(*cp) + sizeof(*adv_set) * cp->num_of_sets;
+	hci_req_add(req, HCI_OP_LE_SET_EXT_ADV_ENABLE, req_size, data);
+
+	return 0;
+}
+
+int __hci_req_remove_ext_adv_instance(struct hci_request *req, u8 instance)
+{
+	struct hci_dev *hdev = req->hdev;
+
+	/* If request specifies an instance that doesn't exist, fail */
+	if (instance > 0 && !hci_find_adv_instance(hdev, instance))
+		return -EINVAL;
+
+	hci_req_add(req, HCI_OP_LE_REMOVE_ADV_SET, sizeof(instance), &instance);
+
+	return 0;
+}
+
+int __hci_req_start_ext_adv(struct hci_request *req, u8 instance)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct adv_info *adv_instance = hci_find_adv_instance(hdev, instance);
+	int err;
+
+	/* If instance isn't pending, the chip knows about it, and it's safe to
+	 * disable
+	 */
+	if (adv_instance && !adv_instance->pending)
+		__hci_req_disable_ext_adv_instance(req, instance);
+
+	err = __hci_req_setup_ext_adv_instance(req, instance);
+	if (err < 0)
+		return err;
+
+	__hci_req_update_scan_rsp_data(req, instance);
+	__hci_req_enable_ext_advertising(req, instance);
+
+	return 0;
+}
+
+int __hci_req_schedule_adv_instance(struct hci_request *req, u8 instance,
+				    bool force)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct adv_info *adv_instance = NULL;
+	u16 timeout;
+
+	if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
+	    list_empty(&hdev->adv_instances))
+		return -EPERM;
+
+	if (hdev->adv_instance_timeout)
+		return -EBUSY;
+
+	adv_instance = hci_find_adv_instance(hdev, instance);
+	if (!adv_instance)
+		return -ENOENT;
+
+	/* A zero timeout means unlimited advertising. As long as there is
+	 * only one instance, duration should be ignored. We still set a timeout
+	 * in case further instances are being added later on.
+	 *
+	 * If the remaining lifetime of the instance is more than the duration
+	 * then the timeout corresponds to the duration, otherwise it will be
+	 * reduced to the remaining instance lifetime.
+	 */
+	if (adv_instance->timeout == 0 ||
+	    adv_instance->duration <= adv_instance->remaining_time)
+		timeout = adv_instance->duration;
+	else
+		timeout = adv_instance->remaining_time;
+
+	/* The remaining time is being reduced unless the instance is being
+	 * advertised without time limit.
+	 */
+	if (adv_instance->timeout)
+		adv_instance->remaining_time =
+				adv_instance->remaining_time - timeout;
+
+	/* Only use work for scheduling instances with legacy advertising */
+	if (!ext_adv_capable(hdev)) {
+		hdev->adv_instance_timeout = timeout;
+		queue_delayed_work(hdev->req_workqueue,
+			   &hdev->adv_instance_expire,
+			   msecs_to_jiffies(timeout * 1000));
+	}
+
+	/* If we're just re-scheduling the same instance again then do not
+	 * execute any HCI commands. This happens when a single instance is
+	 * being advertised.
+	 */
+	if (!force && hdev->cur_adv_instance == instance &&
+	    hci_dev_test_flag(hdev, HCI_LE_ADV))
+		return 0;
+
+	hdev->cur_adv_instance = instance;
+	if (ext_adv_capable(hdev)) {
+		__hci_req_start_ext_adv(req, instance);
+	} else {
+		__hci_req_update_adv_data(req, instance);
+		__hci_req_update_scan_rsp_data(req, instance);
+		__hci_req_enable_advertising(req);
+	}
+
+	return 0;
+}
+
+/* For a single instance:
+ * - force == true: The instance will be removed even when its remaining
+ *   lifetime is not zero.
+ * - force == false: the instance will be deactivated but kept stored unless
+ *   the remaining lifetime is zero.
+ *
+ * For instance == 0x00:
+ * - force == true: All instances will be removed regardless of their timeout
+ *   setting.
+ * - force == false: Only instances that have a timeout will be removed.
+ */
+void hci_req_clear_adv_instance(struct hci_dev *hdev, struct sock *sk,
+				struct hci_request *req, u8 instance,
+				bool force)
+{
+	struct adv_info *adv_instance, *n, *next_instance = NULL;
+	int err;
+	u8 rem_inst;
+
+	/* Cancel any timeout concerning the removed instance(s). */
+	if (!instance || hdev->cur_adv_instance == instance)
+		cancel_adv_timeout(hdev);
+
+	/* Get the next instance to advertise BEFORE we remove
+	 * the current one. This can be the same instance again
+	 * if there is only one instance.
+	 */
+	if (instance && hdev->cur_adv_instance == instance)
+		next_instance = hci_get_next_instance(hdev, instance);
+
+	if (instance == 0x00) {
+		list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances,
+					 list) {
+			if (!(force || adv_instance->timeout))
+				continue;
+
+			rem_inst = adv_instance->instance;
+			err = hci_remove_adv_instance(hdev, rem_inst);
+			if (!err)
+				mgmt_advertising_removed(sk, hdev, rem_inst);
+		}
+	} else {
+		adv_instance = hci_find_adv_instance(hdev, instance);
+
+		if (force || (adv_instance && adv_instance->timeout &&
+			      !adv_instance->remaining_time)) {
+			/* Don't advertise a removed instance. */
+			if (next_instance &&
+			    next_instance->instance == instance)
+				next_instance = NULL;
+
+			err = hci_remove_adv_instance(hdev, instance);
+			if (!err)
+				mgmt_advertising_removed(sk, hdev, instance);
+		}
+	}
+
+	if (!req || !hdev_is_powered(hdev) ||
+	    hci_dev_test_flag(hdev, HCI_ADVERTISING))
+		return;
+
+	if (next_instance && !ext_adv_capable(hdev))
+		__hci_req_schedule_adv_instance(req, next_instance->instance,
+						false);
+}
+
+static void set_random_addr(struct hci_request *req, bdaddr_t *rpa)
+{
+	struct hci_dev *hdev = req->hdev;
+
+	/* If we're advertising or initiating an LE connection we can't
+	 * go ahead and change the random address at this time. This is
+	 * because the eventual initiator address used for the
+	 * subsequently created connection will be undefined (some
+	 * controllers use the new address and others the one we had
+	 * when the operation started).
+	 *
+	 * In this kind of scenario skip the update and let the random
+	 * address be updated at the next cycle.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_LE_ADV) ||
+	    hci_lookup_le_connect(hdev)) {
+		BT_DBG("Deferring random address update");
+		hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
+		return;
+	}
+
+	hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6, rpa);
+}
+
+int hci_update_random_address(struct hci_request *req, bool require_privacy,
+			      bool use_rpa, u8 *own_addr_type)
+{
+	struct hci_dev *hdev = req->hdev;
+	int err;
+
+	/* If privacy is enabled use a resolvable private address. If
+	 * current RPA has expired or there is something else than
+	 * the current RPA in use, then generate a new one.
+	 */
+	if (use_rpa) {
+		int to;
+
+		/* If Controller supports LL Privacy use own address type is
+		 * 0x03
+		 */
+		if (use_ll_privacy(hdev))
+			*own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
+		else
+			*own_addr_type = ADDR_LE_DEV_RANDOM;
+
+		if (!hci_dev_test_and_clear_flag(hdev, HCI_RPA_EXPIRED) &&
+		    !bacmp(&hdev->random_addr, &hdev->rpa))
+			return 0;
+
+		err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
+		if (err < 0) {
+			bt_dev_err(hdev, "failed to generate new RPA");
+			return err;
+		}
+
+		set_random_addr(req, &hdev->rpa);
+
+		to = msecs_to_jiffies(hdev->rpa_timeout * 1000);
+		queue_delayed_work(hdev->workqueue, &hdev->rpa_expired, to);
+
+		return 0;
+	}
+
+	/* In case of required privacy without resolvable private address,
+	 * use an non-resolvable private address. This is useful for active
+	 * scanning and non-connectable advertising.
+	 */
+	if (require_privacy) {
+		bdaddr_t nrpa;
+
+		while (true) {
+			/* The non-resolvable private address is generated
+			 * from random six bytes with the two most significant
+			 * bits cleared.
+			 */
+			get_random_bytes(&nrpa, 6);
+			nrpa.b[5] &= 0x3f;
+
+			/* The non-resolvable private address shall not be
+			 * equal to the public address.
+			 */
+			if (bacmp(&hdev->bdaddr, &nrpa))
+				break;
+		}
+
+		*own_addr_type = ADDR_LE_DEV_RANDOM;
+		set_random_addr(req, &nrpa);
+		return 0;
+	}
+
+	/* If forcing static address is in use or there is no public
+	 * address use the static address as random address (but skip
+	 * the HCI command if the current random address is already the
+	 * static one.
+	 *
+	 * In case BR/EDR has been disabled on a dual-mode controller
+	 * and a static address has been configured, then use that
+	 * address instead of the public BR/EDR address.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
+	    !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
+	    (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
+	     bacmp(&hdev->static_addr, BDADDR_ANY))) {
+		*own_addr_type = ADDR_LE_DEV_RANDOM;
+		if (bacmp(&hdev->static_addr, &hdev->random_addr))
+			hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6,
+				    &hdev->static_addr);
+		return 0;
+	}
+
+	/* Neither privacy nor static address is being used so use a
+	 * public address.
+	 */
+	*own_addr_type = ADDR_LE_DEV_PUBLIC;
+
+	return 0;
+}
+
+static bool disconnected_accept_list_entries(struct hci_dev *hdev)
+{
+	struct bdaddr_list *b;
+
+	list_for_each_entry(b, &hdev->accept_list, list) {
+		struct hci_conn *conn;
+
+		conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &b->bdaddr);
+		if (!conn)
+			return true;
+
+		if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
+			return true;
+	}
+
+	return false;
+}
+
+void __hci_req_update_scan(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+	u8 scan;
+
+	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
+		return;
+
+	if (!hdev_is_powered(hdev))
+		return;
+
+	if (mgmt_powering_down(hdev))
+		return;
+
+	if (hdev->scanning_paused)
+		return;
+
+	if (hci_dev_test_flag(hdev, HCI_CONNECTABLE) ||
+	    disconnected_accept_list_entries(hdev))
+		scan = SCAN_PAGE;
+	else
+		scan = SCAN_DISABLED;
+
+	if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
+		scan |= SCAN_INQUIRY;
+
+	if (test_bit(HCI_PSCAN, &hdev->flags) == !!(scan & SCAN_PAGE) &&
+	    test_bit(HCI_ISCAN, &hdev->flags) == !!(scan & SCAN_INQUIRY))
+		return;
+
+	hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
+}
+
+static int update_scan(struct hci_request *req, unsigned long opt)
+{
+	hci_dev_lock(req->hdev);
+	__hci_req_update_scan(req);
+	hci_dev_unlock(req->hdev);
+	return 0;
+}
+
+static void scan_update_work(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev, scan_update);
+
+	hci_req_sync(hdev, update_scan, 0, HCI_CMD_TIMEOUT, NULL);
+}
+
+static int connectable_update(struct hci_request *req, unsigned long opt)
+{
+	struct hci_dev *hdev = req->hdev;
+
+	hci_dev_lock(hdev);
+
+	__hci_req_update_scan(req);
+
+	/* If BR/EDR is not enabled and we disable advertising as a
+	 * by-product of disabling connectable, we need to update the
+	 * advertising flags.
+	 */
+	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
+		__hci_req_update_adv_data(req, hdev->cur_adv_instance);
+
+	/* Update the advertising parameters if necessary */
+	if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
+	    !list_empty(&hdev->adv_instances)) {
+		if (ext_adv_capable(hdev))
+			__hci_req_start_ext_adv(req, hdev->cur_adv_instance);
+		else
+			__hci_req_enable_advertising(req);
+	}
+
+	__hci_update_background_scan(req);
+
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static void connectable_update_work(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev,
+					    connectable_update);
+	u8 status;
+
+	hci_req_sync(hdev, connectable_update, 0, HCI_CMD_TIMEOUT, &status);
+	mgmt_set_connectable_complete(hdev, status);
+}
+
+static u8 get_service_classes(struct hci_dev *hdev)
+{
+	struct bt_uuid *uuid;
+	u8 val = 0;
+
+	list_for_each_entry(uuid, &hdev->uuids, list)
+		val |= uuid->svc_hint;
+
+	return val;
+}
+
+void __hci_req_update_class(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+	u8 cod[3];
+
+	BT_DBG("%s", hdev->name);
+
+	if (!hdev_is_powered(hdev))
+		return;
+
+	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
+		return;
+
+	if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
+		return;
+
+	cod[0] = hdev->minor_class;
+	cod[1] = hdev->major_class;
+	cod[2] = get_service_classes(hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
+		cod[1] |= 0x20;
+
+	if (memcmp(cod, hdev->dev_class, 3) == 0)
+		return;
+
+	hci_req_add(req, HCI_OP_WRITE_CLASS_OF_DEV, sizeof(cod), cod);
+}
+
+static void write_iac(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct hci_cp_write_current_iac_lap cp;
+
+	if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
+		return;
+
+	if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
+		/* Limited discoverable mode */
+		cp.num_iac = min_t(u8, hdev->num_iac, 2);
+		cp.iac_lap[0] = 0x00;	/* LIAC */
+		cp.iac_lap[1] = 0x8b;
+		cp.iac_lap[2] = 0x9e;
+		cp.iac_lap[3] = 0x33;	/* GIAC */
+		cp.iac_lap[4] = 0x8b;
+		cp.iac_lap[5] = 0x9e;
+	} else {
+		/* General discoverable mode */
+		cp.num_iac = 1;
+		cp.iac_lap[0] = 0x33;	/* GIAC */
+		cp.iac_lap[1] = 0x8b;
+		cp.iac_lap[2] = 0x9e;
+	}
+
+	hci_req_add(req, HCI_OP_WRITE_CURRENT_IAC_LAP,
+		    (cp.num_iac * 3) + 1, &cp);
+}
+
+static int discoverable_update(struct hci_request *req, unsigned long opt)
+{
+	struct hci_dev *hdev = req->hdev;
+
+	hci_dev_lock(hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
+		write_iac(req);
+		__hci_req_update_scan(req);
+		__hci_req_update_class(req);
+	}
+
+	/* Advertising instances don't use the global discoverable setting, so
+	 * only update AD if advertising was enabled using Set Advertising.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
+		__hci_req_update_adv_data(req, 0x00);
+
+		/* Discoverable mode affects the local advertising
+		 * address in limited privacy mode.
+		 */
+		if (hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) {
+			if (ext_adv_capable(hdev))
+				__hci_req_start_ext_adv(req, 0x00);
+			else
+				__hci_req_enable_advertising(req);
+		}
+	}
+
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static void discoverable_update_work(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev,
+					    discoverable_update);
+	u8 status;
+
+	hci_req_sync(hdev, discoverable_update, 0, HCI_CMD_TIMEOUT, &status);
+	mgmt_set_discoverable_complete(hdev, status);
+}
+
+void __hci_abort_conn(struct hci_request *req, struct hci_conn *conn,
+		      u8 reason)
+{
+	switch (conn->state) {
+	case BT_CONNECTED:
+	case BT_CONFIG:
+		if (conn->type == AMP_LINK) {
+			struct hci_cp_disconn_phy_link cp;
+
+			cp.phy_handle = HCI_PHY_HANDLE(conn->handle);
+			cp.reason = reason;
+			hci_req_add(req, HCI_OP_DISCONN_PHY_LINK, sizeof(cp),
+				    &cp);
+		} else {
+			struct hci_cp_disconnect dc;
+
+			dc.handle = cpu_to_le16(conn->handle);
+			dc.reason = reason;
+			hci_req_add(req, HCI_OP_DISCONNECT, sizeof(dc), &dc);
+		}
+
+		conn->state = BT_DISCONN;
+
+		break;
+	case BT_CONNECT:
+		if (conn->type == LE_LINK) {
+			if (test_bit(HCI_CONN_SCANNING, &conn->flags))
+				break;
+			hci_req_add(req, HCI_OP_LE_CREATE_CONN_CANCEL,
+				    0, NULL);
+		} else if (conn->type == ACL_LINK) {
+			if (req->hdev->hci_ver < BLUETOOTH_VER_1_2)
+				break;
+			hci_req_add(req, HCI_OP_CREATE_CONN_CANCEL,
+				    6, &conn->dst);
+		}
+		break;
+	case BT_CONNECT2:
+		if (conn->type == ACL_LINK) {
+			struct hci_cp_reject_conn_req rej;
+
+			bacpy(&rej.bdaddr, &conn->dst);
+			rej.reason = reason;
+
+			hci_req_add(req, HCI_OP_REJECT_CONN_REQ,
+				    sizeof(rej), &rej);
+		} else if (conn->type == SCO_LINK || conn->type == ESCO_LINK) {
+			struct hci_cp_reject_sync_conn_req rej;
+
+			bacpy(&rej.bdaddr, &conn->dst);
+
+			/* SCO rejection has its own limited set of
+			 * allowed error values (0x0D-0x0F) which isn't
+			 * compatible with most values passed to this
+			 * function. To be safe hard-code one of the
+			 * values that's suitable for SCO.
+			 */
+			rej.reason = HCI_ERROR_REJ_LIMITED_RESOURCES;
+
+			hci_req_add(req, HCI_OP_REJECT_SYNC_CONN_REQ,
+				    sizeof(rej), &rej);
+		}
+		break;
+	default:
+		conn->state = BT_CLOSED;
+		break;
+	}
+}
+
+static void abort_conn_complete(struct hci_dev *hdev, u8 status, u16 opcode)
+{
+	if (status)
+		BT_DBG("Failed to abort connection: status 0x%2.2x", status);
+}
+
+int hci_abort_conn(struct hci_conn *conn, u8 reason)
+{
+	struct hci_request req;
+	int err;
+
+	hci_req_init(&req, conn->hdev);
+
+	__hci_abort_conn(&req, conn, reason);
+
+	err = hci_req_run(&req, abort_conn_complete);
+	if (err && err != -ENODATA) {
+		bt_dev_err(conn->hdev, "failed to run HCI request: err %d", err);
+		return err;
+	}
+
+	return 0;
+}
+
+static int update_bg_scan(struct hci_request *req, unsigned long opt)
+{
+	hci_dev_lock(req->hdev);
+	__hci_update_background_scan(req);
+	hci_dev_unlock(req->hdev);
+	return 0;
+}
+
+static void bg_scan_update(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev,
+					    bg_scan_update);
+	struct hci_conn *conn;
+	u8 status;
+	int err;
+
+	err = hci_req_sync(hdev, update_bg_scan, 0, HCI_CMD_TIMEOUT, &status);
+	if (!err)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);
+	if (conn)
+		hci_le_conn_failed(conn, status);
+
+	hci_dev_unlock(hdev);
+}
+
+static int le_scan_disable(struct hci_request *req, unsigned long opt)
+{
+	hci_req_add_le_scan_disable(req, false);
+	return 0;
+}
+
+static int bredr_inquiry(struct hci_request *req, unsigned long opt)
+{
+	u8 length = opt;
+	const u8 giac[3] = { 0x33, 0x8b, 0x9e };
+	const u8 liac[3] = { 0x00, 0x8b, 0x9e };
+	struct hci_cp_inquiry cp;
+
+	BT_DBG("%s", req->hdev->name);
+
+	hci_dev_lock(req->hdev);
+	hci_inquiry_cache_flush(req->hdev);
+	hci_dev_unlock(req->hdev);
+
+	memset(&cp, 0, sizeof(cp));
+
+	if (req->hdev->discovery.limited)
+		memcpy(&cp.lap, liac, sizeof(cp.lap));
+	else
+		memcpy(&cp.lap, giac, sizeof(cp.lap));
+
+	cp.length = length;
+
+	hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
+
+	return 0;
+}
+
+static void le_scan_disable_work(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev,
+					    le_scan_disable.work);
+	u8 status;
+
+	BT_DBG("%s", hdev->name);
+
+	if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
+		return;
+
+	cancel_delayed_work(&hdev->le_scan_restart);
+
+	hci_req_sync(hdev, le_scan_disable, 0, HCI_CMD_TIMEOUT, &status);
+	if (status) {
+		bt_dev_err(hdev, "failed to disable LE scan: status 0x%02x",
+			   status);
+		return;
+	}
+
+	hdev->discovery.scan_start = 0;
+
+	/* If we were running LE only scan, change discovery state. If
+	 * we were running both LE and BR/EDR inquiry simultaneously,
+	 * and BR/EDR inquiry is already finished, stop discovery,
+	 * otherwise BR/EDR inquiry will stop discovery when finished.
+	 * If we will resolve remote device name, do not change
+	 * discovery state.
+	 */
+
+	if (hdev->discovery.type == DISCOV_TYPE_LE)
+		goto discov_stopped;
+
+	if (hdev->discovery.type != DISCOV_TYPE_INTERLEAVED)
+		return;
+
+	if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks)) {
+		if (!test_bit(HCI_INQUIRY, &hdev->flags) &&
+		    hdev->discovery.state != DISCOVERY_RESOLVING)
+			goto discov_stopped;
+
+		return;
+	}
+
+	hci_req_sync(hdev, bredr_inquiry, DISCOV_INTERLEAVED_INQUIRY_LEN,
+		     HCI_CMD_TIMEOUT, &status);
+	if (status) {
+		bt_dev_err(hdev, "inquiry failed: status 0x%02x", status);
+		goto discov_stopped;
+	}
+
+	return;
+
+discov_stopped:
+	hci_dev_lock(hdev);
+	hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+	hci_dev_unlock(hdev);
+}
+
+static int le_scan_restart(struct hci_request *req, unsigned long opt)
+{
+	struct hci_dev *hdev = req->hdev;
+
+	/* If controller is not scanning we are done. */
+	if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
+		return 0;
+
+	if (hdev->scanning_paused) {
+		bt_dev_dbg(hdev, "Scanning is paused for suspend");
+		return 0;
+	}
+
+	hci_req_add_le_scan_disable(req, false);
+
+	if (use_ext_scan(hdev)) {
+		struct hci_cp_le_set_ext_scan_enable ext_enable_cp;
+
+		memset(&ext_enable_cp, 0, sizeof(ext_enable_cp));
+		ext_enable_cp.enable = LE_SCAN_ENABLE;
+		ext_enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
+
+		hci_req_add(req, HCI_OP_LE_SET_EXT_SCAN_ENABLE,
+			    sizeof(ext_enable_cp), &ext_enable_cp);
+	} else {
+		struct hci_cp_le_set_scan_enable cp;
+
+		memset(&cp, 0, sizeof(cp));
+		cp.enable = LE_SCAN_ENABLE;
+		cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
+		hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
+	}
+
+	return 0;
+}
+
+static void le_scan_restart_work(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev,
+					    le_scan_restart.work);
+	unsigned long timeout, duration, scan_start, now;
+	u8 status;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_req_sync(hdev, le_scan_restart, 0, HCI_CMD_TIMEOUT, &status);
+	if (status) {
+		bt_dev_err(hdev, "failed to restart LE scan: status %d",
+			   status);
+		return;
+	}
+
+	hci_dev_lock(hdev);
+
+	if (!test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) ||
+	    !hdev->discovery.scan_start)
+		goto unlock;
+
+	/* When the scan was started, hdev->le_scan_disable has been queued
+	 * after duration from scan_start. During scan restart this job
+	 * has been canceled, and we need to queue it again after proper
+	 * timeout, to make sure that scan does not run indefinitely.
+	 */
+	duration = hdev->discovery.scan_duration;
+	scan_start = hdev->discovery.scan_start;
+	now = jiffies;
+	if (now - scan_start <= duration) {
+		int elapsed;
+
+		if (now >= scan_start)
+			elapsed = now - scan_start;
+		else
+			elapsed = ULONG_MAX - scan_start + now;
+
+		timeout = duration - elapsed;
+	} else {
+		timeout = 0;
+	}
+
+	queue_delayed_work(hdev->req_workqueue,
+			   &hdev->le_scan_disable, timeout);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int active_scan(struct hci_request *req, unsigned long opt)
+{
+	uint16_t interval = opt;
+	struct hci_dev *hdev = req->hdev;
+	u8 own_addr_type;
+	/* Accept list is not used for discovery */
+	u8 filter_policy = 0x00;
+	/* Discovery doesn't require controller address resolution */
+	bool addr_resolv = false;
+	int err;
+
+	BT_DBG("%s", hdev->name);
+
+	/* If controller is scanning, it means the background scanning is
+	 * running. Thus, we should temporarily stop it in order to set the
+	 * discovery scanning parameters.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_LE_SCAN))
+		hci_req_add_le_scan_disable(req, false);
+
+	/* All active scans will be done with either a resolvable private
+	 * address (when privacy feature has been enabled) or non-resolvable
+	 * private address.
+	 */
+	err = hci_update_random_address(req, true, scan_use_rpa(hdev),
+					&own_addr_type);
+	if (err < 0)
+		own_addr_type = ADDR_LE_DEV_PUBLIC;
+
+	hci_req_start_scan(req, LE_SCAN_ACTIVE, interval,
+			   hdev->le_scan_window_discovery, own_addr_type,
+			   filter_policy, addr_resolv);
+	return 0;
+}
+
+static int interleaved_discov(struct hci_request *req, unsigned long opt)
+{
+	int err;
+
+	BT_DBG("%s", req->hdev->name);
+
+	err = active_scan(req, opt);
+	if (err)
+		return err;
+
+	return bredr_inquiry(req, DISCOV_BREDR_INQUIRY_LEN);
+}
+
+static void start_discovery(struct hci_dev *hdev, u8 *status)
+{
+	unsigned long timeout;
+
+	BT_DBG("%s type %u", hdev->name, hdev->discovery.type);
+
+	switch (hdev->discovery.type) {
+	case DISCOV_TYPE_BREDR:
+		if (!hci_dev_test_flag(hdev, HCI_INQUIRY))
+			hci_req_sync(hdev, bredr_inquiry,
+				     DISCOV_BREDR_INQUIRY_LEN, HCI_CMD_TIMEOUT,
+				     status);
+		return;
+	case DISCOV_TYPE_INTERLEAVED:
+		/* When running simultaneous discovery, the LE scanning time
+		 * should occupy the whole discovery time sine BR/EDR inquiry
+		 * and LE scanning are scheduled by the controller.
+		 *
+		 * For interleaving discovery in comparison, BR/EDR inquiry
+		 * and LE scanning are done sequentially with separate
+		 * timeouts.
+		 */
+		if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
+			     &hdev->quirks)) {
+			timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
+			/* During simultaneous discovery, we double LE scan
+			 * interval. We must leave some time for the controller
+			 * to do BR/EDR inquiry.
+			 */
+			hci_req_sync(hdev, interleaved_discov,
+				     hdev->le_scan_int_discovery * 2, HCI_CMD_TIMEOUT,
+				     status);
+			break;
+		}
+
+		timeout = msecs_to_jiffies(hdev->discov_interleaved_timeout);
+		hci_req_sync(hdev, active_scan, hdev->le_scan_int_discovery,
+			     HCI_CMD_TIMEOUT, status);
+		break;
+	case DISCOV_TYPE_LE:
+		timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
+		hci_req_sync(hdev, active_scan, hdev->le_scan_int_discovery,
+			     HCI_CMD_TIMEOUT, status);
+		break;
+	default:
+		*status = HCI_ERROR_UNSPECIFIED;
+		return;
+	}
+
+	if (*status)
+		return;
+
+	BT_DBG("%s timeout %u ms", hdev->name, jiffies_to_msecs(timeout));
+
+	/* When service discovery is used and the controller has a
+	 * strict duplicate filter, it is important to remember the
+	 * start and duration of the scan. This is required for
+	 * restarting scanning during the discovery phase.
+	 */
+	if (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) &&
+		     hdev->discovery.result_filtering) {
+		hdev->discovery.scan_start = jiffies;
+		hdev->discovery.scan_duration = timeout;
+	}
+
+	queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_disable,
+			   timeout);
+}
+
+bool hci_req_stop_discovery(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct discovery_state *d = &hdev->discovery;
+	struct hci_cp_remote_name_req_cancel cp;
+	struct inquiry_entry *e;
+	bool ret = false;
+
+	BT_DBG("%s state %u", hdev->name, hdev->discovery.state);
+
+	if (d->state == DISCOVERY_FINDING || d->state == DISCOVERY_STOPPING) {
+		if (test_bit(HCI_INQUIRY, &hdev->flags))
+			hci_req_add(req, HCI_OP_INQUIRY_CANCEL, 0, NULL);
+
+		if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
+			cancel_delayed_work(&hdev->le_scan_disable);
+			hci_req_add_le_scan_disable(req, false);
+		}
+
+		ret = true;
+	} else {
+		/* Passive scanning */
+		if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
+			hci_req_add_le_scan_disable(req, false);
+			ret = true;
+		}
+	}
+
+	/* No further actions needed for LE-only discovery */
+	if (d->type == DISCOV_TYPE_LE)
+		return ret;
+
+	if (d->state == DISCOVERY_RESOLVING || d->state == DISCOVERY_STOPPING) {
+		e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY,
+						     NAME_PENDING);
+		if (!e)
+			return ret;
+
+		bacpy(&cp.bdaddr, &e->data.bdaddr);
+		hci_req_add(req, HCI_OP_REMOTE_NAME_REQ_CANCEL, sizeof(cp),
+			    &cp);
+		ret = true;
+	}
+
+	return ret;
+}
+
+static int stop_discovery(struct hci_request *req, unsigned long opt)
+{
+	hci_dev_lock(req->hdev);
+	hci_req_stop_discovery(req);
+	hci_dev_unlock(req->hdev);
+
+	return 0;
+}
+
+static void discov_update(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev,
+					    discov_update);
+	u8 status = 0;
+
+	switch (hdev->discovery.state) {
+	case DISCOVERY_STARTING:
+		start_discovery(hdev, &status);
+		mgmt_start_discovery_complete(hdev, status);
+		if (status)
+			hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+		else
+			hci_discovery_set_state(hdev, DISCOVERY_FINDING);
+		break;
+	case DISCOVERY_STOPPING:
+		hci_req_sync(hdev, stop_discovery, 0, HCI_CMD_TIMEOUT, &status);
+		mgmt_stop_discovery_complete(hdev, status);
+		if (!status)
+			hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+		break;
+	case DISCOVERY_STOPPED:
+	default:
+		return;
+	}
+}
+
+static void discov_off(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev,
+					    discov_off.work);
+
+	BT_DBG("%s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	/* When discoverable timeout triggers, then just make sure
+	 * the limited discoverable flag is cleared. Even in the case
+	 * of a timeout triggered from general discoverable, it is
+	 * safe to unconditionally clear the flag.
+	 */
+	hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
+	hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
+	hdev->discov_timeout = 0;
+
+	hci_dev_unlock(hdev);
+
+	hci_req_sync(hdev, discoverable_update, 0, HCI_CMD_TIMEOUT, NULL);
+	mgmt_new_settings(hdev);
+}
+
+static int powered_update_hci(struct hci_request *req, unsigned long opt)
+{
+	struct hci_dev *hdev = req->hdev;
+	u8 link_sec;
+
+	hci_dev_lock(hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
+	    !lmp_host_ssp_capable(hdev)) {
+		u8 mode = 0x01;
+
+		hci_req_add(req, HCI_OP_WRITE_SSP_MODE, sizeof(mode), &mode);
+
+		if (bredr_sc_enabled(hdev) && !lmp_host_sc_capable(hdev)) {
+			u8 support = 0x01;
+
+			hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
+				    sizeof(support), &support);
+		}
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_LE_ENABLED) &&
+	    lmp_bredr_capable(hdev)) {
+		struct hci_cp_write_le_host_supported cp;
+
+		cp.le = 0x01;
+		cp.simul = 0x00;
+
+		/* Check first if we already have the right
+		 * host state (host features set)
+		 */
+		if (cp.le != lmp_host_le_capable(hdev) ||
+		    cp.simul != lmp_host_le_br_capable(hdev))
+			hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED,
+				    sizeof(cp), &cp);
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
+		/* Make sure the controller has a good default for
+		 * advertising data. This also applies to the case
+		 * where BR/EDR was toggled during the AUTO_OFF phase.
+		 */
+		if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
+		    list_empty(&hdev->adv_instances)) {
+			int err;
+
+			if (ext_adv_capable(hdev)) {
+				err = __hci_req_setup_ext_adv_instance(req,
+								       0x00);
+				if (!err)
+					__hci_req_update_scan_rsp_data(req,
+								       0x00);
+			} else {
+				err = 0;
+				__hci_req_update_adv_data(req, 0x00);
+				__hci_req_update_scan_rsp_data(req, 0x00);
+			}
+
+			if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
+				if (!ext_adv_capable(hdev))
+					__hci_req_enable_advertising(req);
+				else if (!err)
+					__hci_req_enable_ext_advertising(req,
+									 0x00);
+			}
+		} else if (!list_empty(&hdev->adv_instances)) {
+			struct adv_info *adv_instance;
+
+			adv_instance = list_first_entry(&hdev->adv_instances,
+							struct adv_info, list);
+			__hci_req_schedule_adv_instance(req,
+							adv_instance->instance,
+							true);
+		}
+	}
+
+	link_sec = hci_dev_test_flag(hdev, HCI_LINK_SECURITY);
+	if (link_sec != test_bit(HCI_AUTH, &hdev->flags))
+		hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE,
+			    sizeof(link_sec), &link_sec);
+
+	if (lmp_bredr_capable(hdev)) {
+		if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE))
+			__hci_req_write_fast_connectable(req, true);
+		else
+			__hci_req_write_fast_connectable(req, false);
+		__hci_req_update_scan(req);
+		__hci_req_update_class(req);
+		__hci_req_update_name(req);
+		__hci_req_update_eir(req);
+	}
+
+	hci_dev_unlock(hdev);
+	return 0;
+}
+
+int __hci_req_hci_power_on(struct hci_dev *hdev)
+{
+	/* Register the available SMP channels (BR/EDR and LE) only when
+	 * successfully powering on the controller. This late
+	 * registration is required so that LE SMP can clearly decide if
+	 * the public address or static address is used.
+	 */
+	smp_register(hdev);
+
+	return __hci_req_sync(hdev, powered_update_hci, 0, HCI_CMD_TIMEOUT,
+			      NULL);
+}
+
+void hci_request_setup(struct hci_dev *hdev)
+{
+	INIT_WORK(&hdev->discov_update, discov_update);
+	INIT_WORK(&hdev->bg_scan_update, bg_scan_update);
+	INIT_WORK(&hdev->scan_update, scan_update_work);
+	INIT_WORK(&hdev->connectable_update, connectable_update_work);
+	INIT_WORK(&hdev->discoverable_update, discoverable_update_work);
+	INIT_DELAYED_WORK(&hdev->discov_off, discov_off);
+	INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
+	INIT_DELAYED_WORK(&hdev->le_scan_restart, le_scan_restart_work);
+	INIT_DELAYED_WORK(&hdev->adv_instance_expire, adv_timeout_expire);
+	INIT_DELAYED_WORK(&hdev->interleave_scan, interleave_scan_work);
+}
+
+void hci_request_cancel_all(struct hci_dev *hdev)
+{
+	hci_req_sync_cancel(hdev, ENODEV);
+
+	cancel_work_sync(&hdev->discov_update);
+	cancel_work_sync(&hdev->bg_scan_update);
+	cancel_work_sync(&hdev->scan_update);
+	cancel_work_sync(&hdev->connectable_update);
+	cancel_work_sync(&hdev->discoverable_update);
+	cancel_delayed_work_sync(&hdev->discov_off);
+	cancel_delayed_work_sync(&hdev->le_scan_disable);
+	cancel_delayed_work_sync(&hdev->le_scan_restart);
+
+	if (hdev->adv_instance_timeout) {
+		cancel_delayed_work_sync(&hdev->adv_instance_expire);
+		hdev->adv_instance_timeout = 0;
+	}
+
+	cancel_interleave_scan(hdev);
+}
diff --git a/net/bluetooth/hci_request.h b/net/bluetooth/hci_request.h
new file mode 100644
index 000000000..6a12e84c6
--- /dev/null
+++ b/net/bluetooth/hci_request.h
@@ -0,0 +1,145 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2014 Intel Corporation
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#include <asm/unaligned.h>
+
+#define hci_req_sync_lock(hdev)   mutex_lock(&hdev->req_lock)
+#define hci_req_sync_unlock(hdev) mutex_unlock(&hdev->req_lock)
+
+struct hci_request {
+	struct hci_dev		*hdev;
+	struct sk_buff_head	cmd_q;
+
+	/* If something goes wrong when building the HCI request, the error
+	 * value is stored in this field.
+	 */
+	int			err;
+};
+
+void hci_req_init(struct hci_request *req, struct hci_dev *hdev);
+void hci_req_purge(struct hci_request *req);
+bool hci_req_status_pend(struct hci_dev *hdev);
+int hci_req_run(struct hci_request *req, hci_req_complete_t complete);
+int hci_req_run_skb(struct hci_request *req, hci_req_complete_skb_t complete);
+void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
+		 const void *param);
+void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
+		    const void *param, u8 event);
+void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
+			  hci_req_complete_t *req_complete,
+			  hci_req_complete_skb_t *req_complete_skb);
+
+int hci_req_sync(struct hci_dev *hdev, int (*req)(struct hci_request *req,
+						  unsigned long opt),
+		 unsigned long opt, u32 timeout, u8 *hci_status);
+int __hci_req_sync(struct hci_dev *hdev, int (*func)(struct hci_request *req,
+						     unsigned long opt),
+		   unsigned long opt, u32 timeout, u8 *hci_status);
+void hci_req_sync_cancel(struct hci_dev *hdev, int err);
+
+struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode, u32 plen,
+				const void *param);
+
+int __hci_req_hci_power_on(struct hci_dev *hdev);
+
+void __hci_req_write_fast_connectable(struct hci_request *req, bool enable);
+void __hci_req_update_name(struct hci_request *req);
+void __hci_req_update_eir(struct hci_request *req);
+
+void hci_req_add_le_scan_disable(struct hci_request *req, bool rpa_le_conn);
+void hci_req_add_le_passive_scan(struct hci_request *req);
+
+void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next);
+
+void hci_req_disable_address_resolution(struct hci_dev *hdev);
+void hci_req_reenable_advertising(struct hci_dev *hdev);
+void __hci_req_enable_advertising(struct hci_request *req);
+void __hci_req_disable_advertising(struct hci_request *req);
+void __hci_req_update_adv_data(struct hci_request *req, u8 instance);
+int hci_req_update_adv_data(struct hci_dev *hdev, u8 instance);
+void __hci_req_update_scan_rsp_data(struct hci_request *req, u8 instance);
+
+int __hci_req_schedule_adv_instance(struct hci_request *req, u8 instance,
+				    bool force);
+void hci_req_clear_adv_instance(struct hci_dev *hdev, struct sock *sk,
+				struct hci_request *req, u8 instance,
+				bool force);
+
+int __hci_req_setup_ext_adv_instance(struct hci_request *req, u8 instance);
+int __hci_req_start_ext_adv(struct hci_request *req, u8 instance);
+int __hci_req_enable_ext_advertising(struct hci_request *req, u8 instance);
+int __hci_req_disable_ext_adv_instance(struct hci_request *req, u8 instance);
+int __hci_req_remove_ext_adv_instance(struct hci_request *req, u8 instance);
+void __hci_req_clear_ext_adv_sets(struct hci_request *req);
+int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
+			   bool use_rpa, struct adv_info *adv_instance,
+			   u8 *own_addr_type, bdaddr_t *rand_addr);
+
+void __hci_req_update_class(struct hci_request *req);
+
+/* Returns true if HCI commands were queued */
+bool hci_req_stop_discovery(struct hci_request *req);
+
+static inline void hci_req_update_scan(struct hci_dev *hdev)
+{
+	queue_work(hdev->req_workqueue, &hdev->scan_update);
+}
+
+void __hci_req_update_scan(struct hci_request *req);
+
+int hci_update_random_address(struct hci_request *req, bool require_privacy,
+			      bool use_rpa, u8 *own_addr_type);
+
+int hci_abort_conn(struct hci_conn *conn, u8 reason);
+void __hci_abort_conn(struct hci_request *req, struct hci_conn *conn,
+		      u8 reason);
+
+static inline void hci_update_background_scan(struct hci_dev *hdev)
+{
+	queue_work(hdev->req_workqueue, &hdev->bg_scan_update);
+}
+
+void hci_request_setup(struct hci_dev *hdev);
+void hci_request_cancel_all(struct hci_dev *hdev);
+
+u8 append_local_name(struct hci_dev *hdev, u8 *ptr, u8 ad_len);
+
+static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type,
+				  u8 *data, u8 data_len)
+{
+	eir[eir_len++] = sizeof(type) + data_len;
+	eir[eir_len++] = type;
+	memcpy(&eir[eir_len], data, data_len);
+	eir_len += data_len;
+
+	return eir_len;
+}
+
+static inline u16 eir_append_le16(u8 *eir, u16 eir_len, u8 type, u16 data)
+{
+	eir[eir_len++] = sizeof(type) + sizeof(data);
+	eir[eir_len++] = type;
+	put_unaligned_le16(data, &eir[eir_len]);
+	eir_len += sizeof(data);
+
+	return eir_len;
+}
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
new file mode 100644
index 000000000..04db39f67
--- /dev/null
+++ b/net/bluetooth/hci_sock.c
@@ -0,0 +1,2155 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2000-2001 Qualcomm Incorporated
+
+   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth HCI sockets. */
+#include <linux/compat.h>
+#include <linux/export.h>
+#include <linux/utsname.h>
+#include <linux/sched.h>
+#include <asm/unaligned.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/hci_mon.h>
+#include <net/bluetooth/mgmt.h>
+
+#include "mgmt_util.h"
+
+static LIST_HEAD(mgmt_chan_list);
+static DEFINE_MUTEX(mgmt_chan_list_lock);
+
+static DEFINE_IDA(sock_cookie_ida);
+
+static atomic_t monitor_promisc = ATOMIC_INIT(0);
+
+/* ----- HCI socket interface ----- */
+
+/* Socket info */
+#define hci_pi(sk) ((struct hci_pinfo *) sk)
+
+struct hci_pinfo {
+	struct bt_sock    bt;
+	struct hci_dev    *hdev;
+	struct hci_filter filter;
+	__u8              cmsg_mask;
+	unsigned short    channel;
+	unsigned long     flags;
+	__u32             cookie;
+	char              comm[TASK_COMM_LEN];
+};
+
+static struct hci_dev *hci_hdev_from_sock(struct sock *sk)
+{
+	struct hci_dev *hdev = hci_pi(sk)->hdev;
+
+	if (!hdev)
+		return ERR_PTR(-EBADFD);
+	if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
+		return ERR_PTR(-EPIPE);
+	return hdev;
+}
+
+void hci_sock_set_flag(struct sock *sk, int nr)
+{
+	set_bit(nr, &hci_pi(sk)->flags);
+}
+
+void hci_sock_clear_flag(struct sock *sk, int nr)
+{
+	clear_bit(nr, &hci_pi(sk)->flags);
+}
+
+int hci_sock_test_flag(struct sock *sk, int nr)
+{
+	return test_bit(nr, &hci_pi(sk)->flags);
+}
+
+unsigned short hci_sock_get_channel(struct sock *sk)
+{
+	return hci_pi(sk)->channel;
+}
+
+u32 hci_sock_get_cookie(struct sock *sk)
+{
+	return hci_pi(sk)->cookie;
+}
+
+static bool hci_sock_gen_cookie(struct sock *sk)
+{
+	int id = hci_pi(sk)->cookie;
+
+	if (!id) {
+		id = ida_simple_get(&sock_cookie_ida, 1, 0, GFP_KERNEL);
+		if (id < 0)
+			id = 0xffffffff;
+
+		hci_pi(sk)->cookie = id;
+		get_task_comm(hci_pi(sk)->comm, current);
+		return true;
+	}
+
+	return false;
+}
+
+static void hci_sock_free_cookie(struct sock *sk)
+{
+	int id = hci_pi(sk)->cookie;
+
+	if (id) {
+		hci_pi(sk)->cookie = 0xffffffff;
+		ida_simple_remove(&sock_cookie_ida, id);
+	}
+}
+
+static inline int hci_test_bit(int nr, const void *addr)
+{
+	return *((const __u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31));
+}
+
+/* Security filter */
+#define HCI_SFLT_MAX_OGF  5
+
+struct hci_sec_filter {
+	__u32 type_mask;
+	__u32 event_mask[2];
+	__u32 ocf_mask[HCI_SFLT_MAX_OGF + 1][4];
+};
+
+static const struct hci_sec_filter hci_sec_filter = {
+	/* Packet types */
+	0x10,
+	/* Events */
+	{ 0x1000d9fe, 0x0000b00c },
+	/* Commands */
+	{
+		{ 0x0 },
+		/* OGF_LINK_CTL */
+		{ 0xbe000006, 0x00000001, 0x00000000, 0x00 },
+		/* OGF_LINK_POLICY */
+		{ 0x00005200, 0x00000000, 0x00000000, 0x00 },
+		/* OGF_HOST_CTL */
+		{ 0xaab00200, 0x2b402aaa, 0x05220154, 0x00 },
+		/* OGF_INFO_PARAM */
+		{ 0x000002be, 0x00000000, 0x00000000, 0x00 },
+		/* OGF_STATUS_PARAM */
+		{ 0x000000ea, 0x00000000, 0x00000000, 0x00 }
+	}
+};
+
+static struct bt_sock_list hci_sk_list = {
+	.lock = __RW_LOCK_UNLOCKED(hci_sk_list.lock)
+};
+
+static bool is_filtered_packet(struct sock *sk, struct sk_buff *skb)
+{
+	struct hci_filter *flt;
+	int flt_type, flt_event;
+
+	/* Apply filter */
+	flt = &hci_pi(sk)->filter;
+
+	flt_type = hci_skb_pkt_type(skb) & HCI_FLT_TYPE_BITS;
+
+	if (!test_bit(flt_type, &flt->type_mask))
+		return true;
+
+	/* Extra filter for event packets only */
+	if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT)
+		return false;
+
+	flt_event = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS);
+
+	if (!hci_test_bit(flt_event, &flt->event_mask))
+		return true;
+
+	/* Check filter only when opcode is set */
+	if (!flt->opcode)
+		return false;
+
+	if (flt_event == HCI_EV_CMD_COMPLETE &&
+	    flt->opcode != get_unaligned((__le16 *)(skb->data + 3)))
+		return true;
+
+	if (flt_event == HCI_EV_CMD_STATUS &&
+	    flt->opcode != get_unaligned((__le16 *)(skb->data + 4)))
+		return true;
+
+	return false;
+}
+
+/* Send frame to RAW socket */
+void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct sock *sk;
+	struct sk_buff *skb_copy = NULL;
+
+	BT_DBG("hdev %p len %d", hdev, skb->len);
+
+	read_lock(&hci_sk_list.lock);
+
+	sk_for_each(sk, &hci_sk_list.head) {
+		struct sk_buff *nskb;
+
+		if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev)
+			continue;
+
+		/* Don't send frame to the socket it came from */
+		if (skb->sk == sk)
+			continue;
+
+		if (hci_pi(sk)->channel == HCI_CHANNEL_RAW) {
+			if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT &&
+			    hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
+			    hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
+			    hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
+			    hci_skb_pkt_type(skb) != HCI_ISODATA_PKT)
+				continue;
+			if (is_filtered_packet(sk, skb))
+				continue;
+		} else if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
+			if (!bt_cb(skb)->incoming)
+				continue;
+			if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
+			    hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
+			    hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
+			    hci_skb_pkt_type(skb) != HCI_ISODATA_PKT)
+				continue;
+		} else {
+			/* Don't send frame to other channel types */
+			continue;
+		}
+
+		if (!skb_copy) {
+			/* Create a private copy with headroom */
+			skb_copy = __pskb_copy_fclone(skb, 1, GFP_ATOMIC, true);
+			if (!skb_copy)
+				continue;
+
+			/* Put type byte before the data */
+			memcpy(skb_push(skb_copy, 1), &hci_skb_pkt_type(skb), 1);
+		}
+
+		nskb = skb_clone(skb_copy, GFP_ATOMIC);
+		if (!nskb)
+			continue;
+
+		if (sock_queue_rcv_skb(sk, nskb))
+			kfree_skb(nskb);
+	}
+
+	read_unlock(&hci_sk_list.lock);
+
+	kfree_skb(skb_copy);
+}
+
+/* Send frame to sockets with specific channel */
+static void __hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
+				  int flag, struct sock *skip_sk)
+{
+	struct sock *sk;
+
+	BT_DBG("channel %u len %d", channel, skb->len);
+
+	sk_for_each(sk, &hci_sk_list.head) {
+		struct sk_buff *nskb;
+
+		/* Ignore socket without the flag set */
+		if (!hci_sock_test_flag(sk, flag))
+			continue;
+
+		/* Skip the original socket */
+		if (sk == skip_sk)
+			continue;
+
+		if (sk->sk_state != BT_BOUND)
+			continue;
+
+		if (hci_pi(sk)->channel != channel)
+			continue;
+
+		nskb = skb_clone(skb, GFP_ATOMIC);
+		if (!nskb)
+			continue;
+
+		if (sock_queue_rcv_skb(sk, nskb))
+			kfree_skb(nskb);
+	}
+
+}
+
+void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
+			 int flag, struct sock *skip_sk)
+{
+	read_lock(&hci_sk_list.lock);
+	__hci_send_to_channel(channel, skb, flag, skip_sk);
+	read_unlock(&hci_sk_list.lock);
+}
+
+/* Send frame to monitor socket */
+void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct sk_buff *skb_copy = NULL;
+	struct hci_mon_hdr *hdr;
+	__le16 opcode;
+
+	if (!atomic_read(&monitor_promisc))
+		return;
+
+	BT_DBG("hdev %p len %d", hdev, skb->len);
+
+	switch (hci_skb_pkt_type(skb)) {
+	case HCI_COMMAND_PKT:
+		opcode = cpu_to_le16(HCI_MON_COMMAND_PKT);
+		break;
+	case HCI_EVENT_PKT:
+		opcode = cpu_to_le16(HCI_MON_EVENT_PKT);
+		break;
+	case HCI_ACLDATA_PKT:
+		if (bt_cb(skb)->incoming)
+			opcode = cpu_to_le16(HCI_MON_ACL_RX_PKT);
+		else
+			opcode = cpu_to_le16(HCI_MON_ACL_TX_PKT);
+		break;
+	case HCI_SCODATA_PKT:
+		if (bt_cb(skb)->incoming)
+			opcode = cpu_to_le16(HCI_MON_SCO_RX_PKT);
+		else
+			opcode = cpu_to_le16(HCI_MON_SCO_TX_PKT);
+		break;
+	case HCI_ISODATA_PKT:
+		if (bt_cb(skb)->incoming)
+			opcode = cpu_to_le16(HCI_MON_ISO_RX_PKT);
+		else
+			opcode = cpu_to_le16(HCI_MON_ISO_TX_PKT);
+		break;
+	case HCI_DIAG_PKT:
+		opcode = cpu_to_le16(HCI_MON_VENDOR_DIAG);
+		break;
+	default:
+		return;
+	}
+
+	/* Create a private copy with headroom */
+	skb_copy = __pskb_copy_fclone(skb, HCI_MON_HDR_SIZE, GFP_ATOMIC, true);
+	if (!skb_copy)
+		return;
+
+	/* Put header before the data */
+	hdr = skb_push(skb_copy, HCI_MON_HDR_SIZE);
+	hdr->opcode = opcode;
+	hdr->index = cpu_to_le16(hdev->id);
+	hdr->len = cpu_to_le16(skb->len);
+
+	hci_send_to_channel(HCI_CHANNEL_MONITOR, skb_copy,
+			    HCI_SOCK_TRUSTED, NULL);
+	kfree_skb(skb_copy);
+}
+
+void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
+				 void *data, u16 data_len, ktime_t tstamp,
+				 int flag, struct sock *skip_sk)
+{
+	struct sock *sk;
+	__le16 index;
+
+	if (hdev)
+		index = cpu_to_le16(hdev->id);
+	else
+		index = cpu_to_le16(MGMT_INDEX_NONE);
+
+	read_lock(&hci_sk_list.lock);
+
+	sk_for_each(sk, &hci_sk_list.head) {
+		struct hci_mon_hdr *hdr;
+		struct sk_buff *skb;
+
+		if (hci_pi(sk)->channel != HCI_CHANNEL_CONTROL)
+			continue;
+
+		/* Ignore socket without the flag set */
+		if (!hci_sock_test_flag(sk, flag))
+			continue;
+
+		/* Skip the original socket */
+		if (sk == skip_sk)
+			continue;
+
+		skb = bt_skb_alloc(6 + data_len, GFP_ATOMIC);
+		if (!skb)
+			continue;
+
+		put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
+		put_unaligned_le16(event, skb_put(skb, 2));
+
+		if (data)
+			skb_put_data(skb, data, data_len);
+
+		skb->tstamp = tstamp;
+
+		hdr = skb_push(skb, HCI_MON_HDR_SIZE);
+		hdr->opcode = cpu_to_le16(HCI_MON_CTRL_EVENT);
+		hdr->index = index;
+		hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
+
+		__hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+				      HCI_SOCK_TRUSTED, NULL);
+		kfree_skb(skb);
+	}
+
+	read_unlock(&hci_sk_list.lock);
+}
+
+static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event)
+{
+	struct hci_mon_hdr *hdr;
+	struct hci_mon_new_index *ni;
+	struct hci_mon_index_info *ii;
+	struct sk_buff *skb;
+	__le16 opcode;
+
+	switch (event) {
+	case HCI_DEV_REG:
+		skb = bt_skb_alloc(HCI_MON_NEW_INDEX_SIZE, GFP_ATOMIC);
+		if (!skb)
+			return NULL;
+
+		ni = skb_put(skb, HCI_MON_NEW_INDEX_SIZE);
+		ni->type = hdev->dev_type;
+		ni->bus = hdev->bus;
+		bacpy(&ni->bdaddr, &hdev->bdaddr);
+		memcpy_and_pad(ni->name, sizeof(ni->name), hdev->name,
+			       strnlen(hdev->name, sizeof(ni->name)), '\0');
+
+		opcode = cpu_to_le16(HCI_MON_NEW_INDEX);
+		break;
+
+	case HCI_DEV_UNREG:
+		skb = bt_skb_alloc(0, GFP_ATOMIC);
+		if (!skb)
+			return NULL;
+
+		opcode = cpu_to_le16(HCI_MON_DEL_INDEX);
+		break;
+
+	case HCI_DEV_SETUP:
+		if (hdev->manufacturer == 0xffff)
+			return NULL;
+		fallthrough;
+
+	case HCI_DEV_UP:
+		skb = bt_skb_alloc(HCI_MON_INDEX_INFO_SIZE, GFP_ATOMIC);
+		if (!skb)
+			return NULL;
+
+		ii = skb_put(skb, HCI_MON_INDEX_INFO_SIZE);
+		bacpy(&ii->bdaddr, &hdev->bdaddr);
+		ii->manufacturer = cpu_to_le16(hdev->manufacturer);
+
+		opcode = cpu_to_le16(HCI_MON_INDEX_INFO);
+		break;
+
+	case HCI_DEV_OPEN:
+		skb = bt_skb_alloc(0, GFP_ATOMIC);
+		if (!skb)
+			return NULL;
+
+		opcode = cpu_to_le16(HCI_MON_OPEN_INDEX);
+		break;
+
+	case HCI_DEV_CLOSE:
+		skb = bt_skb_alloc(0, GFP_ATOMIC);
+		if (!skb)
+			return NULL;
+
+		opcode = cpu_to_le16(HCI_MON_CLOSE_INDEX);
+		break;
+
+	default:
+		return NULL;
+	}
+
+	__net_timestamp(skb);
+
+	hdr = skb_push(skb, HCI_MON_HDR_SIZE);
+	hdr->opcode = opcode;
+	hdr->index = cpu_to_le16(hdev->id);
+	hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
+
+	return skb;
+}
+
+static struct sk_buff *create_monitor_ctrl_open(struct sock *sk)
+{
+	struct hci_mon_hdr *hdr;
+	struct sk_buff *skb;
+	u16 format;
+	u8 ver[3];
+	u32 flags;
+
+	/* No message needed when cookie is not present */
+	if (!hci_pi(sk)->cookie)
+		return NULL;
+
+	switch (hci_pi(sk)->channel) {
+	case HCI_CHANNEL_RAW:
+		format = 0x0000;
+		ver[0] = BT_SUBSYS_VERSION;
+		put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1);
+		break;
+	case HCI_CHANNEL_USER:
+		format = 0x0001;
+		ver[0] = BT_SUBSYS_VERSION;
+		put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1);
+		break;
+	case HCI_CHANNEL_CONTROL:
+		format = 0x0002;
+		mgmt_fill_version_info(ver);
+		break;
+	default:
+		/* No message for unsupported format */
+		return NULL;
+	}
+
+	skb = bt_skb_alloc(14 + TASK_COMM_LEN , GFP_ATOMIC);
+	if (!skb)
+		return NULL;
+
+	flags = hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) ? 0x1 : 0x0;
+
+	put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
+	put_unaligned_le16(format, skb_put(skb, 2));
+	skb_put_data(skb, ver, sizeof(ver));
+	put_unaligned_le32(flags, skb_put(skb, 4));
+	skb_put_u8(skb, TASK_COMM_LEN);
+	skb_put_data(skb, hci_pi(sk)->comm, TASK_COMM_LEN);
+
+	__net_timestamp(skb);
+
+	hdr = skb_push(skb, HCI_MON_HDR_SIZE);
+	hdr->opcode = cpu_to_le16(HCI_MON_CTRL_OPEN);
+	if (hci_pi(sk)->hdev)
+		hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id);
+	else
+		hdr->index = cpu_to_le16(HCI_DEV_NONE);
+	hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
+
+	return skb;
+}
+
+static struct sk_buff *create_monitor_ctrl_close(struct sock *sk)
+{
+	struct hci_mon_hdr *hdr;
+	struct sk_buff *skb;
+
+	/* No message needed when cookie is not present */
+	if (!hci_pi(sk)->cookie)
+		return NULL;
+
+	switch (hci_pi(sk)->channel) {
+	case HCI_CHANNEL_RAW:
+	case HCI_CHANNEL_USER:
+	case HCI_CHANNEL_CONTROL:
+		break;
+	default:
+		/* No message for unsupported format */
+		return NULL;
+	}
+
+	skb = bt_skb_alloc(4, GFP_ATOMIC);
+	if (!skb)
+		return NULL;
+
+	put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
+
+	__net_timestamp(skb);
+
+	hdr = skb_push(skb, HCI_MON_HDR_SIZE);
+	hdr->opcode = cpu_to_le16(HCI_MON_CTRL_CLOSE);
+	if (hci_pi(sk)->hdev)
+		hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id);
+	else
+		hdr->index = cpu_to_le16(HCI_DEV_NONE);
+	hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
+
+	return skb;
+}
+
+static struct sk_buff *create_monitor_ctrl_command(struct sock *sk, u16 index,
+						   u16 opcode, u16 len,
+						   const void *buf)
+{
+	struct hci_mon_hdr *hdr;
+	struct sk_buff *skb;
+
+	skb = bt_skb_alloc(6 + len, GFP_ATOMIC);
+	if (!skb)
+		return NULL;
+
+	put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
+	put_unaligned_le16(opcode, skb_put(skb, 2));
+
+	if (buf)
+		skb_put_data(skb, buf, len);
+
+	__net_timestamp(skb);
+
+	hdr = skb_push(skb, HCI_MON_HDR_SIZE);
+	hdr->opcode = cpu_to_le16(HCI_MON_CTRL_COMMAND);
+	hdr->index = cpu_to_le16(index);
+	hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
+
+	return skb;
+}
+
+static void __printf(2, 3)
+send_monitor_note(struct sock *sk, const char *fmt, ...)
+{
+	size_t len;
+	struct hci_mon_hdr *hdr;
+	struct sk_buff *skb;
+	va_list args;
+
+	va_start(args, fmt);
+	len = vsnprintf(NULL, 0, fmt, args);
+	va_end(args);
+
+	skb = bt_skb_alloc(len + 1, GFP_ATOMIC);
+	if (!skb)
+		return;
+
+	va_start(args, fmt);
+	vsprintf(skb_put(skb, len), fmt, args);
+	*(u8 *)skb_put(skb, 1) = 0;
+	va_end(args);
+
+	__net_timestamp(skb);
+
+	hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE);
+	hdr->opcode = cpu_to_le16(HCI_MON_SYSTEM_NOTE);
+	hdr->index = cpu_to_le16(HCI_DEV_NONE);
+	hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
+
+	if (sock_queue_rcv_skb(sk, skb))
+		kfree_skb(skb);
+}
+
+static void send_monitor_replay(struct sock *sk)
+{
+	struct hci_dev *hdev;
+
+	read_lock(&hci_dev_list_lock);
+
+	list_for_each_entry(hdev, &hci_dev_list, list) {
+		struct sk_buff *skb;
+
+		skb = create_monitor_event(hdev, HCI_DEV_REG);
+		if (!skb)
+			continue;
+
+		if (sock_queue_rcv_skb(sk, skb))
+			kfree_skb(skb);
+
+		if (!test_bit(HCI_RUNNING, &hdev->flags))
+			continue;
+
+		skb = create_monitor_event(hdev, HCI_DEV_OPEN);
+		if (!skb)
+			continue;
+
+		if (sock_queue_rcv_skb(sk, skb))
+			kfree_skb(skb);
+
+		if (test_bit(HCI_UP, &hdev->flags))
+			skb = create_monitor_event(hdev, HCI_DEV_UP);
+		else if (hci_dev_test_flag(hdev, HCI_SETUP))
+			skb = create_monitor_event(hdev, HCI_DEV_SETUP);
+		else
+			skb = NULL;
+
+		if (skb) {
+			if (sock_queue_rcv_skb(sk, skb))
+				kfree_skb(skb);
+		}
+	}
+
+	read_unlock(&hci_dev_list_lock);
+}
+
+static void send_monitor_control_replay(struct sock *mon_sk)
+{
+	struct sock *sk;
+
+	read_lock(&hci_sk_list.lock);
+
+	sk_for_each(sk, &hci_sk_list.head) {
+		struct sk_buff *skb;
+
+		skb = create_monitor_ctrl_open(sk);
+		if (!skb)
+			continue;
+
+		if (sock_queue_rcv_skb(mon_sk, skb))
+			kfree_skb(skb);
+	}
+
+	read_unlock(&hci_sk_list.lock);
+}
+
+/* Generate internal stack event */
+static void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data)
+{
+	struct hci_event_hdr *hdr;
+	struct hci_ev_stack_internal *ev;
+	struct sk_buff *skb;
+
+	skb = bt_skb_alloc(HCI_EVENT_HDR_SIZE + sizeof(*ev) + dlen, GFP_ATOMIC);
+	if (!skb)
+		return;
+
+	hdr = skb_put(skb, HCI_EVENT_HDR_SIZE);
+	hdr->evt  = HCI_EV_STACK_INTERNAL;
+	hdr->plen = sizeof(*ev) + dlen;
+
+	ev = skb_put(skb, sizeof(*ev) + dlen);
+	ev->type = type;
+	memcpy(ev->data, data, dlen);
+
+	bt_cb(skb)->incoming = 1;
+	__net_timestamp(skb);
+
+	hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
+	hci_send_to_sock(hdev, skb);
+	kfree_skb(skb);
+}
+
+void hci_sock_dev_event(struct hci_dev *hdev, int event)
+{
+	BT_DBG("hdev %s event %d", hdev->name, event);
+
+	if (atomic_read(&monitor_promisc)) {
+		struct sk_buff *skb;
+
+		/* Send event to monitor */
+		skb = create_monitor_event(hdev, event);
+		if (skb) {
+			hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+					    HCI_SOCK_TRUSTED, NULL);
+			kfree_skb(skb);
+		}
+	}
+
+	if (event <= HCI_DEV_DOWN) {
+		struct hci_ev_si_device ev;
+
+		/* Send event to sockets */
+		ev.event  = event;
+		ev.dev_id = hdev->id;
+		hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev);
+	}
+
+	if (event == HCI_DEV_UNREG) {
+		struct sock *sk;
+
+		/* Wake up sockets using this dead device */
+		read_lock(&hci_sk_list.lock);
+		sk_for_each(sk, &hci_sk_list.head) {
+			if (hci_pi(sk)->hdev == hdev) {
+				sk->sk_err = EPIPE;
+				sk->sk_state_change(sk);
+			}
+		}
+		read_unlock(&hci_sk_list.lock);
+	}
+}
+
+static struct hci_mgmt_chan *__hci_mgmt_chan_find(unsigned short channel)
+{
+	struct hci_mgmt_chan *c;
+
+	list_for_each_entry(c, &mgmt_chan_list, list) {
+		if (c->channel == channel)
+			return c;
+	}
+
+	return NULL;
+}
+
+static struct hci_mgmt_chan *hci_mgmt_chan_find(unsigned short channel)
+{
+	struct hci_mgmt_chan *c;
+
+	mutex_lock(&mgmt_chan_list_lock);
+	c = __hci_mgmt_chan_find(channel);
+	mutex_unlock(&mgmt_chan_list_lock);
+
+	return c;
+}
+
+int hci_mgmt_chan_register(struct hci_mgmt_chan *c)
+{
+	if (c->channel < HCI_CHANNEL_CONTROL)
+		return -EINVAL;
+
+	mutex_lock(&mgmt_chan_list_lock);
+	if (__hci_mgmt_chan_find(c->channel)) {
+		mutex_unlock(&mgmt_chan_list_lock);
+		return -EALREADY;
+	}
+
+	list_add_tail(&c->list, &mgmt_chan_list);
+
+	mutex_unlock(&mgmt_chan_list_lock);
+
+	return 0;
+}
+EXPORT_SYMBOL(hci_mgmt_chan_register);
+
+void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c)
+{
+	mutex_lock(&mgmt_chan_list_lock);
+	list_del(&c->list);
+	mutex_unlock(&mgmt_chan_list_lock);
+}
+EXPORT_SYMBOL(hci_mgmt_chan_unregister);
+
+static int hci_sock_release(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+	struct hci_dev *hdev;
+	struct sk_buff *skb;
+
+	BT_DBG("sock %p sk %p", sock, sk);
+
+	if (!sk)
+		return 0;
+
+	lock_sock(sk);
+
+	switch (hci_pi(sk)->channel) {
+	case HCI_CHANNEL_MONITOR:
+		atomic_dec(&monitor_promisc);
+		break;
+	case HCI_CHANNEL_RAW:
+	case HCI_CHANNEL_USER:
+	case HCI_CHANNEL_CONTROL:
+		/* Send event to monitor */
+		skb = create_monitor_ctrl_close(sk);
+		if (skb) {
+			hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+					    HCI_SOCK_TRUSTED, NULL);
+			kfree_skb(skb);
+		}
+
+		hci_sock_free_cookie(sk);
+		break;
+	}
+
+	bt_sock_unlink(&hci_sk_list, sk);
+
+	hdev = hci_pi(sk)->hdev;
+	if (hdev) {
+		if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
+			/* When releasing a user channel exclusive access,
+			 * call hci_dev_do_close directly instead of calling
+			 * hci_dev_close to ensure the exclusive access will
+			 * be released and the controller brought back down.
+			 *
+			 * The checking of HCI_AUTO_OFF is not needed in this
+			 * case since it will have been cleared already when
+			 * opening the user channel.
+			 */
+			hci_dev_do_close(hdev);
+			hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
+			mgmt_index_added(hdev);
+		}
+
+		atomic_dec(&hdev->promisc);
+		hci_dev_put(hdev);
+	}
+
+	sock_orphan(sk);
+	release_sock(sk);
+	sock_put(sk);
+	return 0;
+}
+
+static int hci_sock_reject_list_add(struct hci_dev *hdev, void __user *arg)
+{
+	bdaddr_t bdaddr;
+	int err;
+
+	if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
+		return -EFAULT;
+
+	hci_dev_lock(hdev);
+
+	err = hci_bdaddr_list_add(&hdev->reject_list, &bdaddr, BDADDR_BREDR);
+
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
+static int hci_sock_reject_list_del(struct hci_dev *hdev, void __user *arg)
+{
+	bdaddr_t bdaddr;
+	int err;
+
+	if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
+		return -EFAULT;
+
+	hci_dev_lock(hdev);
+
+	err = hci_bdaddr_list_del(&hdev->reject_list, &bdaddr, BDADDR_BREDR);
+
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
+/* Ioctls that require bound socket */
+static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd,
+				unsigned long arg)
+{
+	struct hci_dev *hdev = hci_hdev_from_sock(sk);
+
+	if (IS_ERR(hdev))
+		return PTR_ERR(hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
+		return -EBUSY;
+
+	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
+		return -EOPNOTSUPP;
+
+	if (hdev->dev_type != HCI_PRIMARY)
+		return -EOPNOTSUPP;
+
+	switch (cmd) {
+	case HCISETRAW:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		return -EOPNOTSUPP;
+
+	case HCIGETCONNINFO:
+		return hci_get_conn_info(hdev, (void __user *)arg);
+
+	case HCIGETAUTHINFO:
+		return hci_get_auth_info(hdev, (void __user *)arg);
+
+	case HCIBLOCKADDR:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		return hci_sock_reject_list_add(hdev, (void __user *)arg);
+
+	case HCIUNBLOCKADDR:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		return hci_sock_reject_list_del(hdev, (void __user *)arg);
+	}
+
+	return -ENOIOCTLCMD;
+}
+
+static int hci_sock_ioctl(struct socket *sock, unsigned int cmd,
+			  unsigned long arg)
+{
+	void __user *argp = (void __user *)arg;
+	struct sock *sk = sock->sk;
+	int err;
+
+	BT_DBG("cmd %x arg %lx", cmd, arg);
+
+	/* Make sure the cmd is valid before doing anything */
+	switch (cmd) {
+	case HCIGETDEVLIST:
+	case HCIGETDEVINFO:
+	case HCIGETCONNLIST:
+	case HCIDEVUP:
+	case HCIDEVDOWN:
+	case HCIDEVRESET:
+	case HCIDEVRESTAT:
+	case HCISETSCAN:
+	case HCISETAUTH:
+	case HCISETENCRYPT:
+	case HCISETPTYPE:
+	case HCISETLINKPOL:
+	case HCISETLINKMODE:
+	case HCISETACLMTU:
+	case HCISETSCOMTU:
+	case HCIINQUIRY:
+	case HCISETRAW:
+	case HCIGETCONNINFO:
+	case HCIGETAUTHINFO:
+	case HCIBLOCKADDR:
+	case HCIUNBLOCKADDR:
+		break;
+	default:
+		return -ENOIOCTLCMD;
+	}
+
+	lock_sock(sk);
+
+	if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
+		err = -EBADFD;
+		goto done;
+	}
+
+	/* When calling an ioctl on an unbound raw socket, then ensure
+	 * that the monitor gets informed. Ensure that the resulting event
+	 * is only send once by checking if the cookie exists or not. The
+	 * socket cookie will be only ever generated once for the lifetime
+	 * of a given socket.
+	 */
+	if (hci_sock_gen_cookie(sk)) {
+		struct sk_buff *skb;
+
+		/* Perform careful checks before setting the HCI_SOCK_TRUSTED
+		 * flag. Make sure that not only the current task but also
+		 * the socket opener has the required capability, since
+		 * privileged programs can be tricked into making ioctl calls
+		 * on HCI sockets, and the socket should not be marked as
+		 * trusted simply because the ioctl caller is privileged.
+		 */
+		if (sk_capable(sk, CAP_NET_ADMIN))
+			hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
+
+		/* Send event to monitor */
+		skb = create_monitor_ctrl_open(sk);
+		if (skb) {
+			hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+					    HCI_SOCK_TRUSTED, NULL);
+			kfree_skb(skb);
+		}
+	}
+
+	release_sock(sk);
+
+	switch (cmd) {
+	case HCIGETDEVLIST:
+		return hci_get_dev_list(argp);
+
+	case HCIGETDEVINFO:
+		return hci_get_dev_info(argp);
+
+	case HCIGETCONNLIST:
+		return hci_get_conn_list(argp);
+
+	case HCIDEVUP:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		return hci_dev_open(arg);
+
+	case HCIDEVDOWN:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		return hci_dev_close(arg);
+
+	case HCIDEVRESET:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		return hci_dev_reset(arg);
+
+	case HCIDEVRESTAT:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		return hci_dev_reset_stat(arg);
+
+	case HCISETSCAN:
+	case HCISETAUTH:
+	case HCISETENCRYPT:
+	case HCISETPTYPE:
+	case HCISETLINKPOL:
+	case HCISETLINKMODE:
+	case HCISETACLMTU:
+	case HCISETSCOMTU:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		return hci_dev_cmd(cmd, argp);
+
+	case HCIINQUIRY:
+		return hci_inquiry(argp);
+	}
+
+	lock_sock(sk);
+
+	err = hci_sock_bound_ioctl(sk, cmd, arg);
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+#ifdef CONFIG_COMPAT
+static int hci_sock_compat_ioctl(struct socket *sock, unsigned int cmd,
+				 unsigned long arg)
+{
+	switch (cmd) {
+	case HCIDEVUP:
+	case HCIDEVDOWN:
+	case HCIDEVRESET:
+	case HCIDEVRESTAT:
+		return hci_sock_ioctl(sock, cmd, arg);
+	}
+
+	return hci_sock_ioctl(sock, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
+static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
+			 int addr_len)
+{
+	struct sockaddr_hci haddr;
+	struct sock *sk = sock->sk;
+	struct hci_dev *hdev = NULL;
+	struct sk_buff *skb;
+	int len, err = 0;
+
+	BT_DBG("sock %p sk %p", sock, sk);
+
+	if (!addr)
+		return -EINVAL;
+
+	memset(&haddr, 0, sizeof(haddr));
+	len = min_t(unsigned int, sizeof(haddr), addr_len);
+	memcpy(&haddr, addr, len);
+
+	if (haddr.hci_family != AF_BLUETOOTH)
+		return -EINVAL;
+
+	lock_sock(sk);
+
+	/* Allow detaching from dead device and attaching to alive device, if
+	 * the caller wants to re-bind (instead of close) this socket in
+	 * response to hci_sock_dev_event(HCI_DEV_UNREG) notification.
+	 */
+	hdev = hci_pi(sk)->hdev;
+	if (hdev && hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
+		hci_pi(sk)->hdev = NULL;
+		sk->sk_state = BT_OPEN;
+		hci_dev_put(hdev);
+	}
+	hdev = NULL;
+
+	if (sk->sk_state == BT_BOUND) {
+		err = -EALREADY;
+		goto done;
+	}
+
+	switch (haddr.hci_channel) {
+	case HCI_CHANNEL_RAW:
+		if (hci_pi(sk)->hdev) {
+			err = -EALREADY;
+			goto done;
+		}
+
+		if (haddr.hci_dev != HCI_DEV_NONE) {
+			hdev = hci_dev_get(haddr.hci_dev);
+			if (!hdev) {
+				err = -ENODEV;
+				goto done;
+			}
+
+			atomic_inc(&hdev->promisc);
+		}
+
+		hci_pi(sk)->channel = haddr.hci_channel;
+
+		if (!hci_sock_gen_cookie(sk)) {
+			/* In the case when a cookie has already been assigned,
+			 * then there has been already an ioctl issued against
+			 * an unbound socket and with that triggerd an open
+			 * notification. Send a close notification first to
+			 * allow the state transition to bounded.
+			 */
+			skb = create_monitor_ctrl_close(sk);
+			if (skb) {
+				hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+						    HCI_SOCK_TRUSTED, NULL);
+				kfree_skb(skb);
+			}
+		}
+
+		if (capable(CAP_NET_ADMIN))
+			hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
+
+		hci_pi(sk)->hdev = hdev;
+
+		/* Send event to monitor */
+		skb = create_monitor_ctrl_open(sk);
+		if (skb) {
+			hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+					    HCI_SOCK_TRUSTED, NULL);
+			kfree_skb(skb);
+		}
+		break;
+
+	case HCI_CHANNEL_USER:
+		if (hci_pi(sk)->hdev) {
+			err = -EALREADY;
+			goto done;
+		}
+
+		if (haddr.hci_dev == HCI_DEV_NONE) {
+			err = -EINVAL;
+			goto done;
+		}
+
+		if (!capable(CAP_NET_ADMIN)) {
+			err = -EPERM;
+			goto done;
+		}
+
+		hdev = hci_dev_get(haddr.hci_dev);
+		if (!hdev) {
+			err = -ENODEV;
+			goto done;
+		}
+
+		if (test_bit(HCI_INIT, &hdev->flags) ||
+		    hci_dev_test_flag(hdev, HCI_SETUP) ||
+		    hci_dev_test_flag(hdev, HCI_CONFIG) ||
+		    (!hci_dev_test_flag(hdev, HCI_AUTO_OFF) &&
+		     test_bit(HCI_UP, &hdev->flags))) {
+			err = -EBUSY;
+			hci_dev_put(hdev);
+			goto done;
+		}
+
+		if (hci_dev_test_and_set_flag(hdev, HCI_USER_CHANNEL)) {
+			err = -EUSERS;
+			hci_dev_put(hdev);
+			goto done;
+		}
+
+		mgmt_index_removed(hdev);
+
+		err = hci_dev_open(hdev->id);
+		if (err) {
+			if (err == -EALREADY) {
+				/* In case the transport is already up and
+				 * running, clear the error here.
+				 *
+				 * This can happen when opening a user
+				 * channel and HCI_AUTO_OFF grace period
+				 * is still active.
+				 */
+				err = 0;
+			} else {
+				hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
+				mgmt_index_added(hdev);
+				hci_dev_put(hdev);
+				goto done;
+			}
+		}
+
+		hci_pi(sk)->channel = haddr.hci_channel;
+
+		if (!hci_sock_gen_cookie(sk)) {
+			/* In the case when a cookie has already been assigned,
+			 * this socket will transition from a raw socket into
+			 * a user channel socket. For a clean transition, send
+			 * the close notification first.
+			 */
+			skb = create_monitor_ctrl_close(sk);
+			if (skb) {
+				hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+						    HCI_SOCK_TRUSTED, NULL);
+				kfree_skb(skb);
+			}
+		}
+
+		/* The user channel is restricted to CAP_NET_ADMIN
+		 * capabilities and with that implicitly trusted.
+		 */
+		hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
+
+		hci_pi(sk)->hdev = hdev;
+
+		/* Send event to monitor */
+		skb = create_monitor_ctrl_open(sk);
+		if (skb) {
+			hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+					    HCI_SOCK_TRUSTED, NULL);
+			kfree_skb(skb);
+		}
+
+		atomic_inc(&hdev->promisc);
+		break;
+
+	case HCI_CHANNEL_MONITOR:
+		if (haddr.hci_dev != HCI_DEV_NONE) {
+			err = -EINVAL;
+			goto done;
+		}
+
+		if (!capable(CAP_NET_RAW)) {
+			err = -EPERM;
+			goto done;
+		}
+
+		hci_pi(sk)->channel = haddr.hci_channel;
+
+		/* The monitor interface is restricted to CAP_NET_RAW
+		 * capabilities and with that implicitly trusted.
+		 */
+		hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
+
+		send_monitor_note(sk, "Linux version %s (%s)",
+				  init_utsname()->release,
+				  init_utsname()->machine);
+		send_monitor_note(sk, "Bluetooth subsystem version %u.%u",
+				  BT_SUBSYS_VERSION, BT_SUBSYS_REVISION);
+		send_monitor_replay(sk);
+		send_monitor_control_replay(sk);
+
+		atomic_inc(&monitor_promisc);
+		break;
+
+	case HCI_CHANNEL_LOGGING:
+		if (haddr.hci_dev != HCI_DEV_NONE) {
+			err = -EINVAL;
+			goto done;
+		}
+
+		if (!capable(CAP_NET_ADMIN)) {
+			err = -EPERM;
+			goto done;
+		}
+
+		hci_pi(sk)->channel = haddr.hci_channel;
+		break;
+
+	default:
+		if (!hci_mgmt_chan_find(haddr.hci_channel)) {
+			err = -EINVAL;
+			goto done;
+		}
+
+		if (haddr.hci_dev != HCI_DEV_NONE) {
+			err = -EINVAL;
+			goto done;
+		}
+
+		/* Users with CAP_NET_ADMIN capabilities are allowed
+		 * access to all management commands and events. For
+		 * untrusted users the interface is restricted and
+		 * also only untrusted events are sent.
+		 */
+		if (capable(CAP_NET_ADMIN))
+			hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
+
+		hci_pi(sk)->channel = haddr.hci_channel;
+
+		/* At the moment the index and unconfigured index events
+		 * are enabled unconditionally. Setting them on each
+		 * socket when binding keeps this functionality. They
+		 * however might be cleared later and then sending of these
+		 * events will be disabled, but that is then intentional.
+		 *
+		 * This also enables generic events that are safe to be
+		 * received by untrusted users. Example for such events
+		 * are changes to settings, class of device, name etc.
+		 */
+		if (hci_pi(sk)->channel == HCI_CHANNEL_CONTROL) {
+			if (!hci_sock_gen_cookie(sk)) {
+				/* In the case when a cookie has already been
+				 * assigned, this socket will transtion from
+				 * a raw socket into a control socket. To
+				 * allow for a clean transtion, send the
+				 * close notification first.
+				 */
+				skb = create_monitor_ctrl_close(sk);
+				if (skb) {
+					hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+							    HCI_SOCK_TRUSTED, NULL);
+					kfree_skb(skb);
+				}
+			}
+
+			/* Send event to monitor */
+			skb = create_monitor_ctrl_open(sk);
+			if (skb) {
+				hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+						    HCI_SOCK_TRUSTED, NULL);
+				kfree_skb(skb);
+			}
+
+			hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS);
+			hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS);
+			hci_sock_set_flag(sk, HCI_MGMT_OPTION_EVENTS);
+			hci_sock_set_flag(sk, HCI_MGMT_SETTING_EVENTS);
+			hci_sock_set_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS);
+			hci_sock_set_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS);
+		}
+		break;
+	}
+
+	sk->sk_state = BT_BOUND;
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static int hci_sock_getname(struct socket *sock, struct sockaddr *addr,
+			    int peer)
+{
+	struct sockaddr_hci *haddr = (struct sockaddr_hci *)addr;
+	struct sock *sk = sock->sk;
+	struct hci_dev *hdev;
+	int err = 0;
+
+	BT_DBG("sock %p sk %p", sock, sk);
+
+	if (peer)
+		return -EOPNOTSUPP;
+
+	lock_sock(sk);
+
+	hdev = hci_hdev_from_sock(sk);
+	if (IS_ERR(hdev)) {
+		err = PTR_ERR(hdev);
+		goto done;
+	}
+
+	haddr->hci_family = AF_BLUETOOTH;
+	haddr->hci_dev    = hdev->id;
+	haddr->hci_channel= hci_pi(sk)->channel;
+	err = sizeof(*haddr);
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg,
+			  struct sk_buff *skb)
+{
+	__u8 mask = hci_pi(sk)->cmsg_mask;
+
+	if (mask & HCI_CMSG_DIR) {
+		int incoming = bt_cb(skb)->incoming;
+		put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming),
+			 &incoming);
+	}
+
+	if (mask & HCI_CMSG_TSTAMP) {
+#ifdef CONFIG_COMPAT
+		struct old_timeval32 ctv;
+#endif
+		struct __kernel_old_timeval tv;
+		void *data;
+		int len;
+
+		skb_get_timestamp(skb, &tv);
+
+		data = &tv;
+		len = sizeof(tv);
+#ifdef CONFIG_COMPAT
+		if (!COMPAT_USE_64BIT_TIME &&
+		    (msg->msg_flags & MSG_CMSG_COMPAT)) {
+			ctv.tv_sec = tv.tv_sec;
+			ctv.tv_usec = tv.tv_usec;
+			data = &ctv;
+			len = sizeof(ctv);
+		}
+#endif
+
+		put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
+	}
+}
+
+static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg,
+			    size_t len, int flags)
+{
+	int noblock = flags & MSG_DONTWAIT;
+	struct sock *sk = sock->sk;
+	struct sk_buff *skb;
+	int copied, err;
+	unsigned int skblen;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	if (flags & MSG_OOB)
+		return -EOPNOTSUPP;
+
+	if (hci_pi(sk)->channel == HCI_CHANNEL_LOGGING)
+		return -EOPNOTSUPP;
+
+	if (sk->sk_state == BT_CLOSED)
+		return 0;
+
+	skb = skb_recv_datagram(sk, flags, noblock, &err);
+	if (!skb)
+		return err;
+
+	skblen = skb->len;
+	copied = skb->len;
+	if (len < copied) {
+		msg->msg_flags |= MSG_TRUNC;
+		copied = len;
+	}
+
+	skb_reset_transport_header(skb);
+	err = skb_copy_datagram_msg(skb, 0, msg, copied);
+
+	switch (hci_pi(sk)->channel) {
+	case HCI_CHANNEL_RAW:
+		hci_sock_cmsg(sk, msg, skb);
+		break;
+	case HCI_CHANNEL_USER:
+	case HCI_CHANNEL_MONITOR:
+		sock_recv_timestamp(msg, sk, skb);
+		break;
+	default:
+		if (hci_mgmt_chan_find(hci_pi(sk)->channel))
+			sock_recv_timestamp(msg, sk, skb);
+		break;
+	}
+
+	skb_free_datagram(sk, skb);
+
+	if (flags & MSG_TRUNC)
+		copied = skblen;
+
+	return err ? : copied;
+}
+
+static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk,
+			struct msghdr *msg, size_t msglen)
+{
+	void *buf;
+	u8 *cp;
+	struct mgmt_hdr *hdr;
+	u16 opcode, index, len;
+	struct hci_dev *hdev = NULL;
+	const struct hci_mgmt_handler *handler;
+	bool var_len, no_hdev;
+	int err;
+
+	BT_DBG("got %zu bytes", msglen);
+
+	if (msglen < sizeof(*hdr))
+		return -EINVAL;
+
+	buf = kmalloc(msglen, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	if (memcpy_from_msg(buf, msg, msglen)) {
+		err = -EFAULT;
+		goto done;
+	}
+
+	hdr = buf;
+	opcode = __le16_to_cpu(hdr->opcode);
+	index = __le16_to_cpu(hdr->index);
+	len = __le16_to_cpu(hdr->len);
+
+	if (len != msglen - sizeof(*hdr)) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	if (chan->channel == HCI_CHANNEL_CONTROL) {
+		struct sk_buff *skb;
+
+		/* Send event to monitor */
+		skb = create_monitor_ctrl_command(sk, index, opcode, len,
+						  buf + sizeof(*hdr));
+		if (skb) {
+			hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+					    HCI_SOCK_TRUSTED, NULL);
+			kfree_skb(skb);
+		}
+	}
+
+	if (opcode >= chan->handler_count ||
+	    chan->handlers[opcode].func == NULL) {
+		BT_DBG("Unknown op %u", opcode);
+		err = mgmt_cmd_status(sk, index, opcode,
+				      MGMT_STATUS_UNKNOWN_COMMAND);
+		goto done;
+	}
+
+	handler = &chan->handlers[opcode];
+
+	if (!hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) &&
+	    !(handler->flags & HCI_MGMT_UNTRUSTED)) {
+		err = mgmt_cmd_status(sk, index, opcode,
+				      MGMT_STATUS_PERMISSION_DENIED);
+		goto done;
+	}
+
+	if (index != MGMT_INDEX_NONE) {
+		hdev = hci_dev_get(index);
+		if (!hdev) {
+			err = mgmt_cmd_status(sk, index, opcode,
+					      MGMT_STATUS_INVALID_INDEX);
+			goto done;
+		}
+
+		if (hci_dev_test_flag(hdev, HCI_SETUP) ||
+		    hci_dev_test_flag(hdev, HCI_CONFIG) ||
+		    hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
+			err = mgmt_cmd_status(sk, index, opcode,
+					      MGMT_STATUS_INVALID_INDEX);
+			goto done;
+		}
+
+		if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
+		    !(handler->flags & HCI_MGMT_UNCONFIGURED)) {
+			err = mgmt_cmd_status(sk, index, opcode,
+					      MGMT_STATUS_INVALID_INDEX);
+			goto done;
+		}
+	}
+
+	if (!(handler->flags & HCI_MGMT_HDEV_OPTIONAL)) {
+		no_hdev = (handler->flags & HCI_MGMT_NO_HDEV);
+		if (no_hdev != !hdev) {
+			err = mgmt_cmd_status(sk, index, opcode,
+					      MGMT_STATUS_INVALID_INDEX);
+			goto done;
+		}
+	}
+
+	var_len = (handler->flags & HCI_MGMT_VAR_LEN);
+	if ((var_len && len < handler->data_len) ||
+	    (!var_len && len != handler->data_len)) {
+		err = mgmt_cmd_status(sk, index, opcode,
+				      MGMT_STATUS_INVALID_PARAMS);
+		goto done;
+	}
+
+	if (hdev && chan->hdev_init)
+		chan->hdev_init(sk, hdev);
+
+	cp = buf + sizeof(*hdr);
+
+	err = handler->func(sk, hdev, cp, len);
+	if (err < 0)
+		goto done;
+
+	err = msglen;
+
+done:
+	if (hdev)
+		hci_dev_put(hdev);
+
+	kfree(buf);
+	return err;
+}
+
+static int hci_logging_frame(struct sock *sk, struct msghdr *msg, int len)
+{
+	struct hci_mon_hdr *hdr;
+	struct sk_buff *skb;
+	struct hci_dev *hdev;
+	u16 index;
+	int err;
+
+	/* The logging frame consists at minimum of the standard header,
+	 * the priority byte, the ident length byte and at least one string
+	 * terminator NUL byte. Anything shorter are invalid packets.
+	 */
+	if (len < sizeof(*hdr) + 3)
+		return -EINVAL;
+
+	skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
+	if (!skb)
+		return err;
+
+	if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
+		err = -EFAULT;
+		goto drop;
+	}
+
+	hdr = (void *)skb->data;
+
+	if (__le16_to_cpu(hdr->len) != len - sizeof(*hdr)) {
+		err = -EINVAL;
+		goto drop;
+	}
+
+	if (__le16_to_cpu(hdr->opcode) == 0x0000) {
+		__u8 priority = skb->data[sizeof(*hdr)];
+		__u8 ident_len = skb->data[sizeof(*hdr) + 1];
+
+		/* Only the priorities 0-7 are valid and with that any other
+		 * value results in an invalid packet.
+		 *
+		 * The priority byte is followed by an ident length byte and
+		 * the NUL terminated ident string. Check that the ident
+		 * length is not overflowing the packet and also that the
+		 * ident string itself is NUL terminated. In case the ident
+		 * length is zero, the length value actually doubles as NUL
+		 * terminator identifier.
+		 *
+		 * The message follows the ident string (if present) and
+		 * must be NUL terminated. Otherwise it is not a valid packet.
+		 */
+		if (priority > 7 || skb->data[len - 1] != 0x00 ||
+		    ident_len > len - sizeof(*hdr) - 3 ||
+		    skb->data[sizeof(*hdr) + ident_len + 1] != 0x00) {
+			err = -EINVAL;
+			goto drop;
+		}
+	} else {
+		err = -EINVAL;
+		goto drop;
+	}
+
+	index = __le16_to_cpu(hdr->index);
+
+	if (index != MGMT_INDEX_NONE) {
+		hdev = hci_dev_get(index);
+		if (!hdev) {
+			err = -ENODEV;
+			goto drop;
+		}
+	} else {
+		hdev = NULL;
+	}
+
+	hdr->opcode = cpu_to_le16(HCI_MON_USER_LOGGING);
+
+	hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, HCI_SOCK_TRUSTED, NULL);
+	err = len;
+
+	if (hdev)
+		hci_dev_put(hdev);
+
+drop:
+	kfree_skb(skb);
+	return err;
+}
+
+static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg,
+			    size_t len)
+{
+	struct sock *sk = sock->sk;
+	struct hci_mgmt_chan *chan;
+	struct hci_dev *hdev;
+	struct sk_buff *skb;
+	int err;
+
+	BT_DBG("sock %p sk %p", sock, sk);
+
+	if (msg->msg_flags & MSG_OOB)
+		return -EOPNOTSUPP;
+
+	if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE|
+			       MSG_CMSG_COMPAT))
+		return -EINVAL;
+
+	if (len < 4 || len > HCI_MAX_FRAME_SIZE)
+		return -EINVAL;
+
+	lock_sock(sk);
+
+	switch (hci_pi(sk)->channel) {
+	case HCI_CHANNEL_RAW:
+	case HCI_CHANNEL_USER:
+		break;
+	case HCI_CHANNEL_MONITOR:
+		err = -EOPNOTSUPP;
+		goto done;
+	case HCI_CHANNEL_LOGGING:
+		err = hci_logging_frame(sk, msg, len);
+		goto done;
+	default:
+		mutex_lock(&mgmt_chan_list_lock);
+		chan = __hci_mgmt_chan_find(hci_pi(sk)->channel);
+		if (chan)
+			err = hci_mgmt_cmd(chan, sk, msg, len);
+		else
+			err = -EINVAL;
+
+		mutex_unlock(&mgmt_chan_list_lock);
+		goto done;
+	}
+
+	hdev = hci_hdev_from_sock(sk);
+	if (IS_ERR(hdev)) {
+		err = PTR_ERR(hdev);
+		goto done;
+	}
+
+	if (!test_bit(HCI_UP, &hdev->flags)) {
+		err = -ENETDOWN;
+		goto done;
+	}
+
+	skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
+	if (!skb)
+		goto done;
+
+	if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
+		err = -EFAULT;
+		goto drop;
+	}
+
+	hci_skb_pkt_type(skb) = skb->data[0];
+	skb_pull(skb, 1);
+
+	if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
+		/* No permission check is needed for user channel
+		 * since that gets enforced when binding the socket.
+		 *
+		 * However check that the packet type is valid.
+		 */
+		if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT &&
+		    hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
+		    hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
+		    hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
+			err = -EINVAL;
+			goto drop;
+		}
+
+		skb_queue_tail(&hdev->raw_q, skb);
+		queue_work(hdev->workqueue, &hdev->tx_work);
+	} else if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT) {
+		u16 opcode = get_unaligned_le16(skb->data);
+		u16 ogf = hci_opcode_ogf(opcode);
+		u16 ocf = hci_opcode_ocf(opcode);
+
+		if (((ogf > HCI_SFLT_MAX_OGF) ||
+		     !hci_test_bit(ocf & HCI_FLT_OCF_BITS,
+				   &hci_sec_filter.ocf_mask[ogf])) &&
+		    !capable(CAP_NET_RAW)) {
+			err = -EPERM;
+			goto drop;
+		}
+
+		/* Since the opcode has already been extracted here, store
+		 * a copy of the value for later use by the drivers.
+		 */
+		hci_skb_opcode(skb) = opcode;
+
+		if (ogf == 0x3f) {
+			skb_queue_tail(&hdev->raw_q, skb);
+			queue_work(hdev->workqueue, &hdev->tx_work);
+		} else {
+			/* Stand-alone HCI commands must be flagged as
+			 * single-command requests.
+			 */
+			bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
+
+			skb_queue_tail(&hdev->cmd_q, skb);
+			queue_work(hdev->workqueue, &hdev->cmd_work);
+		}
+	} else {
+		if (!capable(CAP_NET_RAW)) {
+			err = -EPERM;
+			goto drop;
+		}
+
+		if (hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
+		    hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
+		    hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
+			err = -EINVAL;
+			goto drop;
+		}
+
+		skb_queue_tail(&hdev->raw_q, skb);
+		queue_work(hdev->workqueue, &hdev->tx_work);
+	}
+
+	err = len;
+
+done:
+	release_sock(sk);
+	return err;
+
+drop:
+	kfree_skb(skb);
+	goto done;
+}
+
+static int hci_sock_setsockopt(struct socket *sock, int level, int optname,
+			       sockptr_t optval, unsigned int len)
+{
+	struct hci_ufilter uf = { .opcode = 0 };
+	struct sock *sk = sock->sk;
+	int err = 0, opt = 0;
+
+	BT_DBG("sk %p, opt %d", sk, optname);
+
+	if (level != SOL_HCI)
+		return -ENOPROTOOPT;
+
+	lock_sock(sk);
+
+	if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
+		err = -EBADFD;
+		goto done;
+	}
+
+	switch (optname) {
+	case HCI_DATA_DIR:
+		if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (opt)
+			hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR;
+		else
+			hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR;
+		break;
+
+	case HCI_TIME_STAMP:
+		if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (opt)
+			hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP;
+		else
+			hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP;
+		break;
+
+	case HCI_FILTER:
+		{
+			struct hci_filter *f = &hci_pi(sk)->filter;
+
+			uf.type_mask = f->type_mask;
+			uf.opcode    = f->opcode;
+			uf.event_mask[0] = *((u32 *) f->event_mask + 0);
+			uf.event_mask[1] = *((u32 *) f->event_mask + 1);
+		}
+
+		len = min_t(unsigned int, len, sizeof(uf));
+		if (copy_from_sockptr(&uf, optval, len)) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (!capable(CAP_NET_RAW)) {
+			uf.type_mask &= hci_sec_filter.type_mask;
+			uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0);
+			uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1);
+		}
+
+		{
+			struct hci_filter *f = &hci_pi(sk)->filter;
+
+			f->type_mask = uf.type_mask;
+			f->opcode    = uf.opcode;
+			*((u32 *) f->event_mask + 0) = uf.event_mask[0];
+			*((u32 *) f->event_mask + 1) = uf.event_mask[1];
+		}
+		break;
+
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static int hci_sock_getsockopt(struct socket *sock, int level, int optname,
+			       char __user *optval, int __user *optlen)
+{
+	struct hci_ufilter uf;
+	struct sock *sk = sock->sk;
+	int len, opt, err = 0;
+
+	BT_DBG("sk %p, opt %d", sk, optname);
+
+	if (level != SOL_HCI)
+		return -ENOPROTOOPT;
+
+	if (get_user(len, optlen))
+		return -EFAULT;
+
+	lock_sock(sk);
+
+	if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
+		err = -EBADFD;
+		goto done;
+	}
+
+	switch (optname) {
+	case HCI_DATA_DIR:
+		if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR)
+			opt = 1;
+		else
+			opt = 0;
+
+		if (put_user(opt, optval))
+			err = -EFAULT;
+		break;
+
+	case HCI_TIME_STAMP:
+		if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP)
+			opt = 1;
+		else
+			opt = 0;
+
+		if (put_user(opt, optval))
+			err = -EFAULT;
+		break;
+
+	case HCI_FILTER:
+		{
+			struct hci_filter *f = &hci_pi(sk)->filter;
+
+			memset(&uf, 0, sizeof(uf));
+			uf.type_mask = f->type_mask;
+			uf.opcode    = f->opcode;
+			uf.event_mask[0] = *((u32 *) f->event_mask + 0);
+			uf.event_mask[1] = *((u32 *) f->event_mask + 1);
+		}
+
+		len = min_t(unsigned int, len, sizeof(uf));
+		if (copy_to_user(optval, &uf, len))
+			err = -EFAULT;
+		break;
+
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static void hci_sock_destruct(struct sock *sk)
+{
+	skb_queue_purge(&sk->sk_receive_queue);
+	skb_queue_purge(&sk->sk_write_queue);
+}
+
+static const struct proto_ops hci_sock_ops = {
+	.family		= PF_BLUETOOTH,
+	.owner		= THIS_MODULE,
+	.release	= hci_sock_release,
+	.bind		= hci_sock_bind,
+	.getname	= hci_sock_getname,
+	.sendmsg	= hci_sock_sendmsg,
+	.recvmsg	= hci_sock_recvmsg,
+	.ioctl		= hci_sock_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= hci_sock_compat_ioctl,
+#endif
+	.poll		= datagram_poll,
+	.listen		= sock_no_listen,
+	.shutdown	= sock_no_shutdown,
+	.setsockopt	= hci_sock_setsockopt,
+	.getsockopt	= hci_sock_getsockopt,
+	.connect	= sock_no_connect,
+	.socketpair	= sock_no_socketpair,
+	.accept		= sock_no_accept,
+	.mmap		= sock_no_mmap
+};
+
+static struct proto hci_sk_proto = {
+	.name		= "HCI",
+	.owner		= THIS_MODULE,
+	.obj_size	= sizeof(struct hci_pinfo)
+};
+
+static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
+			   int kern)
+{
+	struct sock *sk;
+
+	BT_DBG("sock %p", sock);
+
+	if (sock->type != SOCK_RAW)
+		return -ESOCKTNOSUPPORT;
+
+	sock->ops = &hci_sock_ops;
+
+	sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto, kern);
+	if (!sk)
+		return -ENOMEM;
+
+	sock_init_data(sock, sk);
+
+	sock_reset_flag(sk, SOCK_ZAPPED);
+
+	sk->sk_protocol = protocol;
+
+	sock->state = SS_UNCONNECTED;
+	sk->sk_state = BT_OPEN;
+	sk->sk_destruct = hci_sock_destruct;
+
+	bt_sock_link(&hci_sk_list, sk);
+	return 0;
+}
+
+static const struct net_proto_family hci_sock_family_ops = {
+	.family	= PF_BLUETOOTH,
+	.owner	= THIS_MODULE,
+	.create	= hci_sock_create,
+};
+
+int __init hci_sock_init(void)
+{
+	int err;
+
+	BUILD_BUG_ON(sizeof(struct sockaddr_hci) > sizeof(struct sockaddr));
+
+	err = proto_register(&hci_sk_proto, 0);
+	if (err < 0)
+		return err;
+
+	err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops);
+	if (err < 0) {
+		BT_ERR("HCI socket registration failed");
+		goto error;
+	}
+
+	err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL);
+	if (err < 0) {
+		BT_ERR("Failed to create HCI proc file");
+		bt_sock_unregister(BTPROTO_HCI);
+		goto error;
+	}
+
+	BT_INFO("HCI socket layer initialized");
+
+	return 0;
+
+error:
+	proto_unregister(&hci_sk_proto);
+	return err;
+}
+
+void hci_sock_cleanup(void)
+{
+	bt_procfs_cleanup(&init_net, "hci");
+	bt_sock_unregister(BTPROTO_HCI);
+	proto_unregister(&hci_sk_proto);
+}
diff --git a/net/bluetooth/hci_sysfs.c b/net/bluetooth/hci_sysfs.c
new file mode 100644
index 000000000..266112c96
--- /dev/null
+++ b/net/bluetooth/hci_sysfs.c
@@ -0,0 +1,123 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Bluetooth HCI driver model support. */
+
+#include <linux/module.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+static struct class *bt_class;
+
+static void bt_link_release(struct device *dev)
+{
+	struct hci_conn *conn = to_hci_conn(dev);
+	kfree(conn);
+}
+
+static const struct device_type bt_link = {
+	.name    = "link",
+	.release = bt_link_release,
+};
+
+/*
+ * The rfcomm tty device will possibly retain even when conn
+ * is down, and sysfs doesn't support move zombie device,
+ * so we should move the device before conn device is destroyed.
+ */
+static int __match_tty(struct device *dev, void *data)
+{
+	return !strncmp(dev_name(dev), "rfcomm", 6);
+}
+
+void hci_conn_init_sysfs(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+
+	bt_dev_dbg(hdev, "conn %p", conn);
+
+	conn->dev.type = &bt_link;
+	conn->dev.class = bt_class;
+	conn->dev.parent = &hdev->dev;
+
+	device_initialize(&conn->dev);
+}
+
+void hci_conn_add_sysfs(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+
+	bt_dev_dbg(hdev, "conn %p", conn);
+
+	if (device_is_registered(&conn->dev))
+		return;
+
+	dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
+
+	if (device_add(&conn->dev) < 0)
+		bt_dev_err(hdev, "failed to register connection device");
+}
+
+void hci_conn_del_sysfs(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+
+	bt_dev_dbg(hdev, "conn %p", conn);
+
+	if (!device_is_registered(&conn->dev)) {
+		/* If device_add() has *not* succeeded, use *only* put_device()
+		 * to drop the reference count.
+		 */
+		put_device(&conn->dev);
+		return;
+	}
+
+	while (1) {
+		struct device *dev;
+
+		dev = device_find_child(&conn->dev, NULL, __match_tty);
+		if (!dev)
+			break;
+		device_move(dev, NULL, DPM_ORDER_DEV_LAST);
+		put_device(dev);
+	}
+
+	device_unregister(&conn->dev);
+}
+
+static void bt_host_release(struct device *dev)
+{
+	struct hci_dev *hdev = to_hci_dev(dev);
+
+	if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
+		hci_cleanup_dev(hdev);
+	kfree(hdev);
+	module_put(THIS_MODULE);
+}
+
+static const struct device_type bt_host = {
+	.name    = "host",
+	.release = bt_host_release,
+};
+
+void hci_init_sysfs(struct hci_dev *hdev)
+{
+	struct device *dev = &hdev->dev;
+
+	dev->type = &bt_host;
+	dev->class = bt_class;
+
+	__module_get(THIS_MODULE);
+	device_initialize(dev);
+}
+
+int __init bt_sysfs_init(void)
+{
+	bt_class = class_create(THIS_MODULE, "bluetooth");
+
+	return PTR_ERR_OR_ZERO(bt_class);
+}
+
+void bt_sysfs_cleanup(void)
+{
+	class_destroy(bt_class);
+}
diff --git a/net/bluetooth/hidp/Kconfig b/net/bluetooth/hidp/Kconfig
new file mode 100644
index 000000000..14100f341
--- /dev/null
+++ b/net/bluetooth/hidp/Kconfig
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config BT_HIDP
+	tristate "HIDP protocol support"
+	depends on BT_BREDR && INPUT
+	select HID
+	help
+	  HIDP (Human Interface Device Protocol) is a transport layer
+	  for HID reports.  HIDP is required for the Bluetooth Human
+	  Interface Device Profile.
+
+	  Say Y here to compile HIDP support into the kernel or say M to
+	  compile it as module (hidp).
+
diff --git a/net/bluetooth/hidp/Makefile b/net/bluetooth/hidp/Makefile
new file mode 100644
index 000000000..f41b0aa02
--- /dev/null
+++ b/net/bluetooth/hidp/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the Linux Bluetooth HIDP layer
+#
+
+obj-$(CONFIG_BT_HIDP) += hidp.o
+
+hidp-objs := core.o sock.o
diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
new file mode 100644
index 000000000..b946a6379
--- /dev/null
+++ b/net/bluetooth/hidp/core.c
@@ -0,0 +1,1480 @@
+/*
+   HIDP implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org>
+   Copyright (C) 2013 David Herrmann <dh.herrmann@gmail.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#include <linux/kref.h>
+#include <linux/module.h>
+#include <linux/file.h>
+#include <linux/kthread.h>
+#include <linux/hidraw.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/l2cap.h>
+
+#include "hidp.h"
+
+#define VERSION "1.2"
+
+static DECLARE_RWSEM(hidp_session_sem);
+static DECLARE_WAIT_QUEUE_HEAD(hidp_session_wq);
+static LIST_HEAD(hidp_session_list);
+
+static unsigned char hidp_keycode[256] = {
+	  0,   0,   0,   0,  30,  48,  46,  32,  18,  33,  34,  35,  23,  36,
+	 37,  38,  50,  49,  24,  25,  16,  19,  31,  20,  22,  47,  17,  45,
+	 21,  44,   2,   3,   4,   5,   6,   7,   8,   9,  10,  11,  28,   1,
+	 14,  15,  57,  12,  13,  26,  27,  43,  43,  39,  40,  41,  51,  52,
+	 53,  58,  59,  60,  61,  62,  63,  64,  65,  66,  67,  68,  87,  88,
+	 99,  70, 119, 110, 102, 104, 111, 107, 109, 106, 105, 108, 103,  69,
+	 98,  55,  74,  78,  96,  79,  80,  81,  75,  76,  77,  71,  72,  73,
+	 82,  83,  86, 127, 116, 117, 183, 184, 185, 186, 187, 188, 189, 190,
+	191, 192, 193, 194, 134, 138, 130, 132, 128, 129, 131, 137, 133, 135,
+	136, 113, 115, 114,   0,   0,   0, 121,   0,  89,  93, 124,  92,  94,
+	 95,   0,   0,   0, 122, 123,  90,  91,  85,   0,   0,   0,   0,   0,
+	  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
+	  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
+	  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
+	  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
+	  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
+	 29,  42,  56, 125,  97,  54, 100, 126, 164, 166, 165, 163, 161, 115,
+	114, 113, 150, 158, 159, 128, 136, 177, 178, 176, 142, 152, 173, 140
+};
+
+static unsigned char hidp_mkeyspat[] = { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 };
+
+static int hidp_session_probe(struct l2cap_conn *conn,
+			      struct l2cap_user *user);
+static void hidp_session_remove(struct l2cap_conn *conn,
+				struct l2cap_user *user);
+static int hidp_session_thread(void *arg);
+static void hidp_session_terminate(struct hidp_session *s);
+
+static void hidp_copy_session(struct hidp_session *session, struct hidp_conninfo *ci)
+{
+	u32 valid_flags = 0;
+	memset(ci, 0, sizeof(*ci));
+	bacpy(&ci->bdaddr, &session->bdaddr);
+
+	ci->flags = session->flags & valid_flags;
+	ci->state = BT_CONNECTED;
+
+	if (session->input) {
+		ci->vendor  = session->input->id.vendor;
+		ci->product = session->input->id.product;
+		ci->version = session->input->id.version;
+		if (session->input->name)
+			strlcpy(ci->name, session->input->name, 128);
+		else
+			strlcpy(ci->name, "HID Boot Device", 128);
+	} else if (session->hid) {
+		ci->vendor  = session->hid->vendor;
+		ci->product = session->hid->product;
+		ci->version = session->hid->version;
+		strlcpy(ci->name, session->hid->name, 128);
+	}
+}
+
+/* assemble skb, queue message on @transmit and wake up the session thread */
+static int hidp_send_message(struct hidp_session *session, struct socket *sock,
+			     struct sk_buff_head *transmit, unsigned char hdr,
+			     const unsigned char *data, int size)
+{
+	struct sk_buff *skb;
+	struct sock *sk = sock->sk;
+	int ret;
+
+	BT_DBG("session %p data %p size %d", session, data, size);
+
+	if (atomic_read(&session->terminate))
+		return -EIO;
+
+	skb = alloc_skb(size + 1, GFP_ATOMIC);
+	if (!skb) {
+		BT_ERR("Can't allocate memory for new frame");
+		return -ENOMEM;
+	}
+
+	skb_put_u8(skb, hdr);
+	if (data && size > 0) {
+		skb_put_data(skb, data, size);
+		ret = size;
+	} else {
+		ret = 0;
+	}
+
+	skb_queue_tail(transmit, skb);
+	wake_up_interruptible(sk_sleep(sk));
+
+	return ret;
+}
+
+static int hidp_send_ctrl_message(struct hidp_session *session,
+				  unsigned char hdr, const unsigned char *data,
+				  int size)
+{
+	return hidp_send_message(session, session->ctrl_sock,
+				 &session->ctrl_transmit, hdr, data, size);
+}
+
+static int hidp_send_intr_message(struct hidp_session *session,
+				  unsigned char hdr, const unsigned char *data,
+				  int size)
+{
+	return hidp_send_message(session, session->intr_sock,
+				 &session->intr_transmit, hdr, data, size);
+}
+
+static int hidp_input_event(struct input_dev *dev, unsigned int type,
+			    unsigned int code, int value)
+{
+	struct hidp_session *session = input_get_drvdata(dev);
+	unsigned char newleds;
+	unsigned char hdr, data[2];
+
+	BT_DBG("session %p type %d code %d value %d",
+	       session, type, code, value);
+
+	if (type != EV_LED)
+		return -1;
+
+	newleds = (!!test_bit(LED_KANA,    dev->led) << 3) |
+		  (!!test_bit(LED_COMPOSE, dev->led) << 3) |
+		  (!!test_bit(LED_SCROLLL, dev->led) << 2) |
+		  (!!test_bit(LED_CAPSL,   dev->led) << 1) |
+		  (!!test_bit(LED_NUML,    dev->led) << 0);
+
+	if (session->leds == newleds)
+		return 0;
+
+	session->leds = newleds;
+
+	hdr = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
+	data[0] = 0x01;
+	data[1] = newleds;
+
+	return hidp_send_intr_message(session, hdr, data, 2);
+}
+
+static void hidp_input_report(struct hidp_session *session, struct sk_buff *skb)
+{
+	struct input_dev *dev = session->input;
+	unsigned char *keys = session->keys;
+	unsigned char *udata = skb->data + 1;
+	signed char *sdata = skb->data + 1;
+	int i, size = skb->len - 1;
+
+	switch (skb->data[0]) {
+	case 0x01:	/* Keyboard report */
+		for (i = 0; i < 8; i++)
+			input_report_key(dev, hidp_keycode[i + 224], (udata[0] >> i) & 1);
+
+		/* If all the key codes have been set to 0x01, it means
+		 * too many keys were pressed at the same time. */
+		if (!memcmp(udata + 2, hidp_mkeyspat, 6))
+			break;
+
+		for (i = 2; i < 8; i++) {
+			if (keys[i] > 3 && memscan(udata + 2, keys[i], 6) == udata + 8) {
+				if (hidp_keycode[keys[i]])
+					input_report_key(dev, hidp_keycode[keys[i]], 0);
+				else
+					BT_ERR("Unknown key (scancode %#x) released.", keys[i]);
+			}
+
+			if (udata[i] > 3 && memscan(keys + 2, udata[i], 6) == keys + 8) {
+				if (hidp_keycode[udata[i]])
+					input_report_key(dev, hidp_keycode[udata[i]], 1);
+				else
+					BT_ERR("Unknown key (scancode %#x) pressed.", udata[i]);
+			}
+		}
+
+		memcpy(keys, udata, 8);
+		break;
+
+	case 0x02:	/* Mouse report */
+		input_report_key(dev, BTN_LEFT,   sdata[0] & 0x01);
+		input_report_key(dev, BTN_RIGHT,  sdata[0] & 0x02);
+		input_report_key(dev, BTN_MIDDLE, sdata[0] & 0x04);
+		input_report_key(dev, BTN_SIDE,   sdata[0] & 0x08);
+		input_report_key(dev, BTN_EXTRA,  sdata[0] & 0x10);
+
+		input_report_rel(dev, REL_X, sdata[1]);
+		input_report_rel(dev, REL_Y, sdata[2]);
+
+		if (size > 3)
+			input_report_rel(dev, REL_WHEEL, sdata[3]);
+		break;
+	}
+
+	input_sync(dev);
+}
+
+static int hidp_get_raw_report(struct hid_device *hid,
+		unsigned char report_number,
+		unsigned char *data, size_t count,
+		unsigned char report_type)
+{
+	struct hidp_session *session = hid->driver_data;
+	struct sk_buff *skb;
+	size_t len;
+	int numbered_reports = hid->report_enum[report_type].numbered;
+	int ret;
+
+	if (atomic_read(&session->terminate))
+		return -EIO;
+
+	switch (report_type) {
+	case HID_FEATURE_REPORT:
+		report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_FEATURE;
+		break;
+	case HID_INPUT_REPORT:
+		report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_INPUT;
+		break;
+	case HID_OUTPUT_REPORT:
+		report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_OUPUT;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (mutex_lock_interruptible(&session->report_mutex))
+		return -ERESTARTSYS;
+
+	/* Set up our wait, and send the report request to the device. */
+	session->waiting_report_type = report_type & HIDP_DATA_RTYPE_MASK;
+	session->waiting_report_number = numbered_reports ? report_number : -1;
+	set_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
+	data[0] = report_number;
+	ret = hidp_send_ctrl_message(session, report_type, data, 1);
+	if (ret < 0)
+		goto err;
+
+	/* Wait for the return of the report. The returned report
+	   gets put in session->report_return.  */
+	while (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) &&
+	       !atomic_read(&session->terminate)) {
+		int res;
+
+		res = wait_event_interruptible_timeout(session->report_queue,
+			!test_bit(HIDP_WAITING_FOR_RETURN, &session->flags)
+				|| atomic_read(&session->terminate),
+			5*HZ);
+		if (res == 0) {
+			/* timeout */
+			ret = -EIO;
+			goto err;
+		}
+		if (res < 0) {
+			/* signal */
+			ret = -ERESTARTSYS;
+			goto err;
+		}
+	}
+
+	skb = session->report_return;
+	if (skb) {
+		len = skb->len < count ? skb->len : count;
+		memcpy(data, skb->data, len);
+
+		kfree_skb(skb);
+		session->report_return = NULL;
+	} else {
+		/* Device returned a HANDSHAKE, indicating  protocol error. */
+		len = -EIO;
+	}
+
+	clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
+	mutex_unlock(&session->report_mutex);
+
+	return len;
+
+err:
+	clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
+	mutex_unlock(&session->report_mutex);
+	return ret;
+}
+
+static int hidp_set_raw_report(struct hid_device *hid, unsigned char reportnum,
+			       unsigned char *data, size_t count,
+			       unsigned char report_type)
+{
+	struct hidp_session *session = hid->driver_data;
+	int ret;
+
+	switch (report_type) {
+	case HID_FEATURE_REPORT:
+		report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE;
+		break;
+	case HID_INPUT_REPORT:
+		report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_INPUT;
+		break;
+	case HID_OUTPUT_REPORT:
+		report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_OUPUT;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (mutex_lock_interruptible(&session->report_mutex))
+		return -ERESTARTSYS;
+
+	/* Set up our wait, and send the report request to the device. */
+	data[0] = reportnum;
+	set_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags);
+	ret = hidp_send_ctrl_message(session, report_type, data, count);
+	if (ret < 0)
+		goto err;
+
+	/* Wait for the ACK from the device. */
+	while (test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags) &&
+	       !atomic_read(&session->terminate)) {
+		int res;
+
+		res = wait_event_interruptible_timeout(session->report_queue,
+			!test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags)
+				|| atomic_read(&session->terminate),
+			10*HZ);
+		if (res == 0) {
+			/* timeout */
+			ret = -EIO;
+			goto err;
+		}
+		if (res < 0) {
+			/* signal */
+			ret = -ERESTARTSYS;
+			goto err;
+		}
+	}
+
+	if (!session->output_report_success) {
+		ret = -EIO;
+		goto err;
+	}
+
+	ret = count;
+
+err:
+	clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags);
+	mutex_unlock(&session->report_mutex);
+	return ret;
+}
+
+static int hidp_output_report(struct hid_device *hid, __u8 *data, size_t count)
+{
+	struct hidp_session *session = hid->driver_data;
+
+	return hidp_send_intr_message(session,
+				      HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT,
+				      data, count);
+}
+
+static int hidp_raw_request(struct hid_device *hid, unsigned char reportnum,
+			    __u8 *buf, size_t len, unsigned char rtype,
+			    int reqtype)
+{
+	switch (reqtype) {
+	case HID_REQ_GET_REPORT:
+		return hidp_get_raw_report(hid, reportnum, buf, len, rtype);
+	case HID_REQ_SET_REPORT:
+		return hidp_set_raw_report(hid, reportnum, buf, len, rtype);
+	default:
+		return -EIO;
+	}
+}
+
+static void hidp_idle_timeout(struct timer_list *t)
+{
+	struct hidp_session *session = from_timer(session, t, timer);
+
+	/* The HIDP user-space API only contains calls to add and remove
+	 * devices. There is no way to forward events of any kind. Therefore,
+	 * we have to forcefully disconnect a device on idle-timeouts. This is
+	 * unfortunate and weird API design, but it is spec-compliant and
+	 * required for backwards-compatibility. Hence, on idle-timeout, we
+	 * signal driver-detach events, so poll() will be woken up with an
+	 * error-condition on both sockets.
+	 */
+
+	session->intr_sock->sk->sk_err = EUNATCH;
+	session->ctrl_sock->sk->sk_err = EUNATCH;
+	wake_up_interruptible(sk_sleep(session->intr_sock->sk));
+	wake_up_interruptible(sk_sleep(session->ctrl_sock->sk));
+
+	hidp_session_terminate(session);
+}
+
+static void hidp_set_timer(struct hidp_session *session)
+{
+	if (session->idle_to > 0)
+		mod_timer(&session->timer, jiffies + HZ * session->idle_to);
+}
+
+static void hidp_del_timer(struct hidp_session *session)
+{
+	if (session->idle_to > 0)
+		del_timer_sync(&session->timer);
+}
+
+static void hidp_process_report(struct hidp_session *session, int type,
+				const u8 *data, unsigned int len, int intr)
+{
+	if (len > HID_MAX_BUFFER_SIZE)
+		len = HID_MAX_BUFFER_SIZE;
+
+	memcpy(session->input_buf, data, len);
+	hid_input_report(session->hid, type, session->input_buf, len, intr);
+}
+
+static void hidp_process_handshake(struct hidp_session *session,
+					unsigned char param)
+{
+	BT_DBG("session %p param 0x%02x", session, param);
+	session->output_report_success = 0; /* default condition */
+
+	switch (param) {
+	case HIDP_HSHK_SUCCESSFUL:
+		/* FIXME: Call into SET_ GET_ handlers here */
+		session->output_report_success = 1;
+		break;
+
+	case HIDP_HSHK_NOT_READY:
+	case HIDP_HSHK_ERR_INVALID_REPORT_ID:
+	case HIDP_HSHK_ERR_UNSUPPORTED_REQUEST:
+	case HIDP_HSHK_ERR_INVALID_PARAMETER:
+		if (test_and_clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags))
+			wake_up_interruptible(&session->report_queue);
+
+		/* FIXME: Call into SET_ GET_ handlers here */
+		break;
+
+	case HIDP_HSHK_ERR_UNKNOWN:
+		break;
+
+	case HIDP_HSHK_ERR_FATAL:
+		/* Device requests a reboot, as this is the only way this error
+		 * can be recovered. */
+		hidp_send_ctrl_message(session,
+			HIDP_TRANS_HID_CONTROL | HIDP_CTRL_SOFT_RESET, NULL, 0);
+		break;
+
+	default:
+		hidp_send_ctrl_message(session,
+			HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
+		break;
+	}
+
+	/* Wake up the waiting thread. */
+	if (test_and_clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags))
+		wake_up_interruptible(&session->report_queue);
+}
+
+static void hidp_process_hid_control(struct hidp_session *session,
+					unsigned char param)
+{
+	BT_DBG("session %p param 0x%02x", session, param);
+
+	if (param == HIDP_CTRL_VIRTUAL_CABLE_UNPLUG) {
+		/* Flush the transmit queues */
+		skb_queue_purge(&session->ctrl_transmit);
+		skb_queue_purge(&session->intr_transmit);
+
+		hidp_session_terminate(session);
+	}
+}
+
+/* Returns true if the passed-in skb should be freed by the caller. */
+static int hidp_process_data(struct hidp_session *session, struct sk_buff *skb,
+				unsigned char param)
+{
+	int done_with_skb = 1;
+	BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param);
+
+	switch (param) {
+	case HIDP_DATA_RTYPE_INPUT:
+		hidp_set_timer(session);
+
+		if (session->input)
+			hidp_input_report(session, skb);
+
+		if (session->hid)
+			hidp_process_report(session, HID_INPUT_REPORT,
+					    skb->data, skb->len, 0);
+		break;
+
+	case HIDP_DATA_RTYPE_OTHER:
+	case HIDP_DATA_RTYPE_OUPUT:
+	case HIDP_DATA_RTYPE_FEATURE:
+		break;
+
+	default:
+		hidp_send_ctrl_message(session,
+			HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
+	}
+
+	if (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) &&
+				param == session->waiting_report_type) {
+		if (session->waiting_report_number < 0 ||
+		    session->waiting_report_number == skb->data[0]) {
+			/* hidp_get_raw_report() is waiting on this report. */
+			session->report_return = skb;
+			done_with_skb = 0;
+			clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
+			wake_up_interruptible(&session->report_queue);
+		}
+	}
+
+	return done_with_skb;
+}
+
+static void hidp_recv_ctrl_frame(struct hidp_session *session,
+					struct sk_buff *skb)
+{
+	unsigned char hdr, type, param;
+	int free_skb = 1;
+
+	BT_DBG("session %p skb %p len %d", session, skb, skb->len);
+
+	hdr = skb->data[0];
+	skb_pull(skb, 1);
+
+	type = hdr & HIDP_HEADER_TRANS_MASK;
+	param = hdr & HIDP_HEADER_PARAM_MASK;
+
+	switch (type) {
+	case HIDP_TRANS_HANDSHAKE:
+		hidp_process_handshake(session, param);
+		break;
+
+	case HIDP_TRANS_HID_CONTROL:
+		hidp_process_hid_control(session, param);
+		break;
+
+	case HIDP_TRANS_DATA:
+		free_skb = hidp_process_data(session, skb, param);
+		break;
+
+	default:
+		hidp_send_ctrl_message(session,
+			HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0);
+		break;
+	}
+
+	if (free_skb)
+		kfree_skb(skb);
+}
+
+static void hidp_recv_intr_frame(struct hidp_session *session,
+				struct sk_buff *skb)
+{
+	unsigned char hdr;
+
+	BT_DBG("session %p skb %p len %d", session, skb, skb->len);
+
+	hdr = skb->data[0];
+	skb_pull(skb, 1);
+
+	if (hdr == (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) {
+		hidp_set_timer(session);
+
+		if (session->input)
+			hidp_input_report(session, skb);
+
+		if (session->hid) {
+			hidp_process_report(session, HID_INPUT_REPORT,
+					    skb->data, skb->len, 1);
+			BT_DBG("report len %d", skb->len);
+		}
+	} else {
+		BT_DBG("Unsupported protocol header 0x%02x", hdr);
+	}
+
+	kfree_skb(skb);
+}
+
+static int hidp_send_frame(struct socket *sock, unsigned char *data, int len)
+{
+	struct kvec iv = { data, len };
+	struct msghdr msg;
+
+	BT_DBG("sock %p data %p len %d", sock, data, len);
+
+	if (!len)
+		return 0;
+
+	memset(&msg, 0, sizeof(msg));
+
+	return kernel_sendmsg(sock, &msg, &iv, 1, len);
+}
+
+/* dequeue message from @transmit and send via @sock */
+static void hidp_process_transmit(struct hidp_session *session,
+				  struct sk_buff_head *transmit,
+				  struct socket *sock)
+{
+	struct sk_buff *skb;
+	int ret;
+
+	BT_DBG("session %p", session);
+
+	while ((skb = skb_dequeue(transmit))) {
+		ret = hidp_send_frame(sock, skb->data, skb->len);
+		if (ret == -EAGAIN) {
+			skb_queue_head(transmit, skb);
+			break;
+		} else if (ret < 0) {
+			hidp_session_terminate(session);
+			kfree_skb(skb);
+			break;
+		}
+
+		hidp_set_timer(session);
+		kfree_skb(skb);
+	}
+}
+
+static int hidp_setup_input(struct hidp_session *session,
+				const struct hidp_connadd_req *req)
+{
+	struct input_dev *input;
+	int i;
+
+	input = input_allocate_device();
+	if (!input)
+		return -ENOMEM;
+
+	session->input = input;
+
+	input_set_drvdata(input, session);
+
+	input->name = "Bluetooth HID Boot Protocol Device";
+
+	input->id.bustype = BUS_BLUETOOTH;
+	input->id.vendor  = req->vendor;
+	input->id.product = req->product;
+	input->id.version = req->version;
+
+	if (req->subclass & 0x40) {
+		set_bit(EV_KEY, input->evbit);
+		set_bit(EV_LED, input->evbit);
+		set_bit(EV_REP, input->evbit);
+
+		set_bit(LED_NUML,    input->ledbit);
+		set_bit(LED_CAPSL,   input->ledbit);
+		set_bit(LED_SCROLLL, input->ledbit);
+		set_bit(LED_COMPOSE, input->ledbit);
+		set_bit(LED_KANA,    input->ledbit);
+
+		for (i = 0; i < sizeof(hidp_keycode); i++)
+			set_bit(hidp_keycode[i], input->keybit);
+		clear_bit(0, input->keybit);
+	}
+
+	if (req->subclass & 0x80) {
+		input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
+		input->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
+			BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
+		input->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
+		input->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) |
+			BIT_MASK(BTN_EXTRA);
+		input->relbit[0] |= BIT_MASK(REL_WHEEL);
+	}
+
+	input->dev.parent = &session->conn->hcon->dev;
+
+	input->event = hidp_input_event;
+
+	return 0;
+}
+
+static int hidp_open(struct hid_device *hid)
+{
+	return 0;
+}
+
+static void hidp_close(struct hid_device *hid)
+{
+}
+
+static int hidp_parse(struct hid_device *hid)
+{
+	struct hidp_session *session = hid->driver_data;
+
+	return hid_parse_report(session->hid, session->rd_data,
+			session->rd_size);
+}
+
+static int hidp_start(struct hid_device *hid)
+{
+	return 0;
+}
+
+static void hidp_stop(struct hid_device *hid)
+{
+	struct hidp_session *session = hid->driver_data;
+
+	skb_queue_purge(&session->ctrl_transmit);
+	skb_queue_purge(&session->intr_transmit);
+
+	hid->claimed = 0;
+}
+
+struct hid_ll_driver hidp_hid_driver = {
+	.parse = hidp_parse,
+	.start = hidp_start,
+	.stop = hidp_stop,
+	.open  = hidp_open,
+	.close = hidp_close,
+	.raw_request = hidp_raw_request,
+	.output_report = hidp_output_report,
+};
+EXPORT_SYMBOL_GPL(hidp_hid_driver);
+
+/* This function sets up the hid device. It does not add it
+   to the HID system. That is done in hidp_add_connection(). */
+static int hidp_setup_hid(struct hidp_session *session,
+				const struct hidp_connadd_req *req)
+{
+	struct hid_device *hid;
+	int err;
+
+	session->rd_data = memdup_user(req->rd_data, req->rd_size);
+	if (IS_ERR(session->rd_data))
+		return PTR_ERR(session->rd_data);
+
+	session->rd_size = req->rd_size;
+
+	hid = hid_allocate_device();
+	if (IS_ERR(hid)) {
+		err = PTR_ERR(hid);
+		goto fault;
+	}
+
+	session->hid = hid;
+
+	hid->driver_data = session;
+
+	hid->bus     = BUS_BLUETOOTH;
+	hid->vendor  = req->vendor;
+	hid->product = req->product;
+	hid->version = req->version;
+	hid->country = req->country;
+
+	strscpy(hid->name, req->name, sizeof(hid->name));
+
+	snprintf(hid->phys, sizeof(hid->phys), "%pMR",
+		 &l2cap_pi(session->ctrl_sock->sk)->chan->src);
+
+	/* NOTE: Some device modules depend on the dst address being stored in
+	 * uniq. Please be aware of this before making changes to this behavior.
+	 */
+	snprintf(hid->uniq, sizeof(hid->uniq), "%pMR",
+		 &l2cap_pi(session->ctrl_sock->sk)->chan->dst);
+
+	hid->dev.parent = &session->conn->hcon->dev;
+	hid->ll_driver = &hidp_hid_driver;
+
+	/* True if device is blacklisted in drivers/hid/hid-quirks.c */
+	if (hid_ignore(hid)) {
+		hid_destroy_device(session->hid);
+		session->hid = NULL;
+		return -ENODEV;
+	}
+
+	return 0;
+
+fault:
+	kfree(session->rd_data);
+	session->rd_data = NULL;
+
+	return err;
+}
+
+/* initialize session devices */
+static int hidp_session_dev_init(struct hidp_session *session,
+				 const struct hidp_connadd_req *req)
+{
+	int ret;
+
+	if (req->rd_size > 0) {
+		ret = hidp_setup_hid(session, req);
+		if (ret && ret != -ENODEV)
+			return ret;
+	}
+
+	if (!session->hid) {
+		ret = hidp_setup_input(session, req);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+/* destroy session devices */
+static void hidp_session_dev_destroy(struct hidp_session *session)
+{
+	if (session->hid)
+		put_device(&session->hid->dev);
+	else if (session->input)
+		input_put_device(session->input);
+
+	kfree(session->rd_data);
+	session->rd_data = NULL;
+}
+
+/* add HID/input devices to their underlying bus systems */
+static int hidp_session_dev_add(struct hidp_session *session)
+{
+	int ret;
+
+	/* Both HID and input systems drop a ref-count when unregistering the
+	 * device but they don't take a ref-count when registering them. Work
+	 * around this by explicitly taking a refcount during registration
+	 * which is dropped automatically by unregistering the devices. */
+
+	if (session->hid) {
+		ret = hid_add_device(session->hid);
+		if (ret)
+			return ret;
+		get_device(&session->hid->dev);
+	} else if (session->input) {
+		ret = input_register_device(session->input);
+		if (ret)
+			return ret;
+		input_get_device(session->input);
+	}
+
+	return 0;
+}
+
+/* remove HID/input devices from their bus systems */
+static void hidp_session_dev_del(struct hidp_session *session)
+{
+	if (session->hid)
+		hid_destroy_device(session->hid);
+	else if (session->input)
+		input_unregister_device(session->input);
+}
+
+/*
+ * Asynchronous device registration
+ * HID device drivers might want to perform I/O during initialization to
+ * detect device types. Therefore, call device registration in a separate
+ * worker so the HIDP thread can schedule I/O operations.
+ * Note that this must be called after the worker thread was initialized
+ * successfully. This will then add the devices and increase session state
+ * on success, otherwise it will terminate the session thread.
+ */
+static void hidp_session_dev_work(struct work_struct *work)
+{
+	struct hidp_session *session = container_of(work,
+						    struct hidp_session,
+						    dev_init);
+	int ret;
+
+	ret = hidp_session_dev_add(session);
+	if (!ret)
+		atomic_inc(&session->state);
+	else
+		hidp_session_terminate(session);
+}
+
+/*
+ * Create new session object
+ * Allocate session object, initialize static fields, copy input data into the
+ * object and take a reference to all sub-objects.
+ * This returns 0 on success and puts a pointer to the new session object in
+ * \out. Otherwise, an error code is returned.
+ * The new session object has an initial ref-count of 1.
+ */
+static int hidp_session_new(struct hidp_session **out, const bdaddr_t *bdaddr,
+			    struct socket *ctrl_sock,
+			    struct socket *intr_sock,
+			    const struct hidp_connadd_req *req,
+			    struct l2cap_conn *conn)
+{
+	struct hidp_session *session;
+	int ret;
+	struct bt_sock *ctrl, *intr;
+
+	ctrl = bt_sk(ctrl_sock->sk);
+	intr = bt_sk(intr_sock->sk);
+
+	session = kzalloc(sizeof(*session), GFP_KERNEL);
+	if (!session)
+		return -ENOMEM;
+
+	/* object and runtime management */
+	kref_init(&session->ref);
+	atomic_set(&session->state, HIDP_SESSION_IDLING);
+	init_waitqueue_head(&session->state_queue);
+	session->flags = req->flags & BIT(HIDP_BLUETOOTH_VENDOR_ID);
+
+	/* connection management */
+	bacpy(&session->bdaddr, bdaddr);
+	session->conn = l2cap_conn_get(conn);
+	session->user.probe = hidp_session_probe;
+	session->user.remove = hidp_session_remove;
+	INIT_LIST_HEAD(&session->user.list);
+	session->ctrl_sock = ctrl_sock;
+	session->intr_sock = intr_sock;
+	skb_queue_head_init(&session->ctrl_transmit);
+	skb_queue_head_init(&session->intr_transmit);
+	session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl)->chan->omtu,
+					l2cap_pi(ctrl)->chan->imtu);
+	session->intr_mtu = min_t(uint, l2cap_pi(intr)->chan->omtu,
+					l2cap_pi(intr)->chan->imtu);
+	session->idle_to = req->idle_to;
+
+	/* device management */
+	INIT_WORK(&session->dev_init, hidp_session_dev_work);
+	timer_setup(&session->timer, hidp_idle_timeout, 0);
+
+	/* session data */
+	mutex_init(&session->report_mutex);
+	init_waitqueue_head(&session->report_queue);
+
+	ret = hidp_session_dev_init(session, req);
+	if (ret)
+		goto err_free;
+
+	get_file(session->intr_sock->file);
+	get_file(session->ctrl_sock->file);
+	*out = session;
+	return 0;
+
+err_free:
+	l2cap_conn_put(session->conn);
+	kfree(session);
+	return ret;
+}
+
+/* increase ref-count of the given session by one */
+static void hidp_session_get(struct hidp_session *session)
+{
+	kref_get(&session->ref);
+}
+
+/* release callback */
+static void session_free(struct kref *ref)
+{
+	struct hidp_session *session = container_of(ref, struct hidp_session,
+						    ref);
+
+	hidp_session_dev_destroy(session);
+	skb_queue_purge(&session->ctrl_transmit);
+	skb_queue_purge(&session->intr_transmit);
+	fput(session->intr_sock->file);
+	fput(session->ctrl_sock->file);
+	l2cap_conn_put(session->conn);
+	kfree(session);
+}
+
+/* decrease ref-count of the given session by one */
+static void hidp_session_put(struct hidp_session *session)
+{
+	kref_put(&session->ref, session_free);
+}
+
+/*
+ * Search the list of active sessions for a session with target address
+ * \bdaddr. You must hold at least a read-lock on \hidp_session_sem. As long as
+ * you do not release this lock, the session objects cannot vanish and you can
+ * safely take a reference to the session yourself.
+ */
+static struct hidp_session *__hidp_session_find(const bdaddr_t *bdaddr)
+{
+	struct hidp_session *session;
+
+	list_for_each_entry(session, &hidp_session_list, list) {
+		if (!bacmp(bdaddr, &session->bdaddr))
+			return session;
+	}
+
+	return NULL;
+}
+
+/*
+ * Same as __hidp_session_find() but no locks must be held. This also takes a
+ * reference of the returned session (if non-NULL) so you must drop this
+ * reference if you no longer use the object.
+ */
+static struct hidp_session *hidp_session_find(const bdaddr_t *bdaddr)
+{
+	struct hidp_session *session;
+
+	down_read(&hidp_session_sem);
+
+	session = __hidp_session_find(bdaddr);
+	if (session)
+		hidp_session_get(session);
+
+	up_read(&hidp_session_sem);
+
+	return session;
+}
+
+/*
+ * Start session synchronously
+ * This starts a session thread and waits until initialization
+ * is done or returns an error if it couldn't be started.
+ * If this returns 0 the session thread is up and running. You must call
+ * hipd_session_stop_sync() before deleting any runtime resources.
+ */
+static int hidp_session_start_sync(struct hidp_session *session)
+{
+	unsigned int vendor, product;
+
+	if (session->hid) {
+		vendor  = session->hid->vendor;
+		product = session->hid->product;
+	} else if (session->input) {
+		vendor  = session->input->id.vendor;
+		product = session->input->id.product;
+	} else {
+		vendor = 0x0000;
+		product = 0x0000;
+	}
+
+	session->task = kthread_run(hidp_session_thread, session,
+				    "khidpd_%04x%04x", vendor, product);
+	if (IS_ERR(session->task))
+		return PTR_ERR(session->task);
+
+	while (atomic_read(&session->state) <= HIDP_SESSION_IDLING)
+		wait_event(session->state_queue,
+			   atomic_read(&session->state) > HIDP_SESSION_IDLING);
+
+	return 0;
+}
+
+/*
+ * Terminate session thread
+ * Wake up session thread and notify it to stop. This is asynchronous and
+ * returns immediately. Call this whenever a runtime error occurs and you want
+ * the session to stop.
+ * Note: wake_up_interruptible() performs any necessary memory-barriers for us.
+ */
+static void hidp_session_terminate(struct hidp_session *session)
+{
+	atomic_inc(&session->terminate);
+	/*
+	 * See the comment preceding the call to wait_woken()
+	 * in hidp_session_run().
+	 */
+	wake_up_interruptible(&hidp_session_wq);
+}
+
+/*
+ * Probe HIDP session
+ * This is called from the l2cap_conn core when our l2cap_user object is bound
+ * to the hci-connection. We get the session via the \user object and can now
+ * start the session thread, link it into the global session list and
+ * schedule HID/input device registration.
+ * The global session-list owns its own reference to the session object so you
+ * can drop your own reference after registering the l2cap_user object.
+ */
+static int hidp_session_probe(struct l2cap_conn *conn,
+			      struct l2cap_user *user)
+{
+	struct hidp_session *session = container_of(user,
+						    struct hidp_session,
+						    user);
+	struct hidp_session *s;
+	int ret;
+
+	down_write(&hidp_session_sem);
+
+	/* check that no other session for this device exists */
+	s = __hidp_session_find(&session->bdaddr);
+	if (s) {
+		ret = -EEXIST;
+		goto out_unlock;
+	}
+
+	if (session->input) {
+		ret = hidp_session_dev_add(session);
+		if (ret)
+			goto out_unlock;
+	}
+
+	ret = hidp_session_start_sync(session);
+	if (ret)
+		goto out_del;
+
+	/* HID device registration is async to allow I/O during probe */
+	if (session->input)
+		atomic_inc(&session->state);
+	else
+		schedule_work(&session->dev_init);
+
+	hidp_session_get(session);
+	list_add(&session->list, &hidp_session_list);
+	ret = 0;
+	goto out_unlock;
+
+out_del:
+	if (session->input)
+		hidp_session_dev_del(session);
+out_unlock:
+	up_write(&hidp_session_sem);
+	return ret;
+}
+
+/*
+ * Remove HIDP session
+ * Called from the l2cap_conn core when either we explicitly unregistered
+ * the l2cap_user object or if the underlying connection is shut down.
+ * We signal the hidp-session thread to shut down, unregister the HID/input
+ * devices and unlink the session from the global list.
+ * This drops the reference to the session that is owned by the global
+ * session-list.
+ * Note: We _must_ not synchronosly wait for the session-thread to shut down.
+ * This is, because the session-thread might be waiting for an HCI lock that is
+ * held while we are called. Therefore, we only unregister the devices and
+ * notify the session-thread to terminate. The thread itself owns a reference
+ * to the session object so it can safely shut down.
+ */
+static void hidp_session_remove(struct l2cap_conn *conn,
+				struct l2cap_user *user)
+{
+	struct hidp_session *session = container_of(user,
+						    struct hidp_session,
+						    user);
+
+	down_write(&hidp_session_sem);
+
+	hidp_session_terminate(session);
+
+	cancel_work_sync(&session->dev_init);
+	if (session->input ||
+	    atomic_read(&session->state) > HIDP_SESSION_PREPARING)
+		hidp_session_dev_del(session);
+
+	list_del(&session->list);
+
+	up_write(&hidp_session_sem);
+
+	hidp_session_put(session);
+}
+
+/*
+ * Session Worker
+ * This performs the actual main-loop of the HIDP worker. We first check
+ * whether the underlying connection is still alive, then parse all pending
+ * messages and finally send all outstanding messages.
+ */
+static void hidp_session_run(struct hidp_session *session)
+{
+	struct sock *ctrl_sk = session->ctrl_sock->sk;
+	struct sock *intr_sk = session->intr_sock->sk;
+	struct sk_buff *skb;
+	DEFINE_WAIT_FUNC(wait, woken_wake_function);
+
+	add_wait_queue(&hidp_session_wq, &wait);
+	for (;;) {
+		/*
+		 * This thread can be woken up two ways:
+		 *  - You call hidp_session_terminate() which sets the
+		 *    session->terminate flag and wakes this thread up.
+		 *  - Via modifying the socket state of ctrl/intr_sock. This
+		 *    thread is woken up by ->sk_state_changed().
+		 */
+
+		if (atomic_read(&session->terminate))
+			break;
+
+		if (ctrl_sk->sk_state != BT_CONNECTED ||
+		    intr_sk->sk_state != BT_CONNECTED)
+			break;
+
+		/* parse incoming intr-skbs */
+		while ((skb = skb_dequeue(&intr_sk->sk_receive_queue))) {
+			skb_orphan(skb);
+			if (!skb_linearize(skb))
+				hidp_recv_intr_frame(session, skb);
+			else
+				kfree_skb(skb);
+		}
+
+		/* send pending intr-skbs */
+		hidp_process_transmit(session, &session->intr_transmit,
+				      session->intr_sock);
+
+		/* parse incoming ctrl-skbs */
+		while ((skb = skb_dequeue(&ctrl_sk->sk_receive_queue))) {
+			skb_orphan(skb);
+			if (!skb_linearize(skb))
+				hidp_recv_ctrl_frame(session, skb);
+			else
+				kfree_skb(skb);
+		}
+
+		/* send pending ctrl-skbs */
+		hidp_process_transmit(session, &session->ctrl_transmit,
+				      session->ctrl_sock);
+
+		/*
+		 * wait_woken() performs the necessary memory barriers
+		 * for us; see the header comment for this primitive.
+		 */
+		wait_woken(&wait, TASK_INTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
+	}
+	remove_wait_queue(&hidp_session_wq, &wait);
+
+	atomic_inc(&session->terminate);
+}
+
+static int hidp_session_wake_function(wait_queue_entry_t *wait,
+				      unsigned int mode,
+				      int sync, void *key)
+{
+	wake_up_interruptible(&hidp_session_wq);
+	return false;
+}
+
+/*
+ * HIDP session thread
+ * This thread runs the I/O for a single HIDP session. Startup is synchronous
+ * which allows us to take references to ourself here instead of doing that in
+ * the caller.
+ * When we are ready to run we notify the caller and call hidp_session_run().
+ */
+static int hidp_session_thread(void *arg)
+{
+	struct hidp_session *session = arg;
+	DEFINE_WAIT_FUNC(ctrl_wait, hidp_session_wake_function);
+	DEFINE_WAIT_FUNC(intr_wait, hidp_session_wake_function);
+
+	BT_DBG("session %p", session);
+
+	/* initialize runtime environment */
+	hidp_session_get(session);
+	__module_get(THIS_MODULE);
+	set_user_nice(current, -15);
+	hidp_set_timer(session);
+
+	add_wait_queue(sk_sleep(session->ctrl_sock->sk), &ctrl_wait);
+	add_wait_queue(sk_sleep(session->intr_sock->sk), &intr_wait);
+	/* This memory barrier is paired with wq_has_sleeper(). See
+	 * sock_poll_wait() for more information why this is needed. */
+	smp_mb__before_atomic();
+
+	/* notify synchronous startup that we're ready */
+	atomic_inc(&session->state);
+	wake_up(&session->state_queue);
+
+	/* run session */
+	hidp_session_run(session);
+
+	/* cleanup runtime environment */
+	remove_wait_queue(sk_sleep(session->intr_sock->sk), &intr_wait);
+	remove_wait_queue(sk_sleep(session->ctrl_sock->sk), &ctrl_wait);
+	wake_up_interruptible(&session->report_queue);
+	hidp_del_timer(session);
+
+	/*
+	 * If we stopped ourself due to any internal signal, we should try to
+	 * unregister our own session here to avoid having it linger until the
+	 * parent l2cap_conn dies or user-space cleans it up.
+	 * This does not deadlock as we don't do any synchronous shutdown.
+	 * Instead, this call has the same semantics as if user-space tried to
+	 * delete the session.
+	 */
+	l2cap_unregister_user(session->conn, &session->user);
+	hidp_session_put(session);
+
+	module_put_and_exit(0);
+	return 0;
+}
+
+static int hidp_verify_sockets(struct socket *ctrl_sock,
+			       struct socket *intr_sock)
+{
+	struct l2cap_chan *ctrl_chan, *intr_chan;
+	struct bt_sock *ctrl, *intr;
+	struct hidp_session *session;
+
+	if (!l2cap_is_socket(ctrl_sock) || !l2cap_is_socket(intr_sock))
+		return -EINVAL;
+
+	ctrl_chan = l2cap_pi(ctrl_sock->sk)->chan;
+	intr_chan = l2cap_pi(intr_sock->sk)->chan;
+
+	if (bacmp(&ctrl_chan->src, &intr_chan->src) ||
+	    bacmp(&ctrl_chan->dst, &intr_chan->dst))
+		return -ENOTUNIQ;
+
+	ctrl = bt_sk(ctrl_sock->sk);
+	intr = bt_sk(intr_sock->sk);
+
+	if (ctrl->sk.sk_state != BT_CONNECTED ||
+	    intr->sk.sk_state != BT_CONNECTED)
+		return -EBADFD;
+
+	/* early session check, we check again during session registration */
+	session = hidp_session_find(&ctrl_chan->dst);
+	if (session) {
+		hidp_session_put(session);
+		return -EEXIST;
+	}
+
+	return 0;
+}
+
+int hidp_connection_add(const struct hidp_connadd_req *req,
+			struct socket *ctrl_sock,
+			struct socket *intr_sock)
+{
+	u32 valid_flags = BIT(HIDP_VIRTUAL_CABLE_UNPLUG) |
+			  BIT(HIDP_BOOT_PROTOCOL_MODE);
+	struct hidp_session *session;
+	struct l2cap_conn *conn;
+	struct l2cap_chan *chan;
+	int ret;
+
+	ret = hidp_verify_sockets(ctrl_sock, intr_sock);
+	if (ret)
+		return ret;
+
+	if (req->flags & ~valid_flags)
+		return -EINVAL;
+
+	chan = l2cap_pi(ctrl_sock->sk)->chan;
+	conn = NULL;
+	l2cap_chan_lock(chan);
+	if (chan->conn)
+		conn = l2cap_conn_get(chan->conn);
+	l2cap_chan_unlock(chan);
+
+	if (!conn)
+		return -EBADFD;
+
+	ret = hidp_session_new(&session, &chan->dst, ctrl_sock,
+			       intr_sock, req, conn);
+	if (ret)
+		goto out_conn;
+
+	ret = l2cap_register_user(conn, &session->user);
+	if (ret)
+		goto out_session;
+
+	ret = 0;
+
+out_session:
+	hidp_session_put(session);
+out_conn:
+	l2cap_conn_put(conn);
+	return ret;
+}
+
+int hidp_connection_del(struct hidp_conndel_req *req)
+{
+	u32 valid_flags = BIT(HIDP_VIRTUAL_CABLE_UNPLUG);
+	struct hidp_session *session;
+
+	if (req->flags & ~valid_flags)
+		return -EINVAL;
+
+	session = hidp_session_find(&req->bdaddr);
+	if (!session)
+		return -ENOENT;
+
+	if (req->flags & BIT(HIDP_VIRTUAL_CABLE_UNPLUG))
+		hidp_send_ctrl_message(session,
+				       HIDP_TRANS_HID_CONTROL |
+				         HIDP_CTRL_VIRTUAL_CABLE_UNPLUG,
+				       NULL, 0);
+	else
+		l2cap_unregister_user(session->conn, &session->user);
+
+	hidp_session_put(session);
+
+	return 0;
+}
+
+int hidp_get_connlist(struct hidp_connlist_req *req)
+{
+	struct hidp_session *session;
+	int err = 0, n = 0;
+
+	BT_DBG("");
+
+	down_read(&hidp_session_sem);
+
+	list_for_each_entry(session, &hidp_session_list, list) {
+		struct hidp_conninfo ci;
+
+		hidp_copy_session(session, &ci);
+
+		if (copy_to_user(req->ci, &ci, sizeof(ci))) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (++n >= req->cnum)
+			break;
+
+		req->ci++;
+	}
+	req->cnum = n;
+
+	up_read(&hidp_session_sem);
+	return err;
+}
+
+int hidp_get_conninfo(struct hidp_conninfo *ci)
+{
+	struct hidp_session *session;
+
+	session = hidp_session_find(&ci->bdaddr);
+	if (session) {
+		hidp_copy_session(session, ci);
+		hidp_session_put(session);
+	}
+
+	return session ? 0 : -ENOENT;
+}
+
+static int __init hidp_init(void)
+{
+	BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION);
+
+	return hidp_init_sockets();
+}
+
+static void __exit hidp_exit(void)
+{
+	hidp_cleanup_sockets();
+}
+
+module_init(hidp_init);
+module_exit(hidp_exit);
+
+MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
+MODULE_AUTHOR("David Herrmann <dh.herrmann@gmail.com>");
+MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("bt-proto-6");
diff --git a/net/bluetooth/hidp/hidp.h b/net/bluetooth/hidp/hidp.h
new file mode 100644
index 000000000..6ef88d0a1
--- /dev/null
+++ b/net/bluetooth/hidp/hidp.h
@@ -0,0 +1,192 @@
+/*
+   HIDP implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#ifndef __HIDP_H
+#define __HIDP_H
+
+#include <linux/types.h>
+#include <linux/hid.h>
+#include <linux/kref.h>
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/l2cap.h>
+
+/* HIDP header masks */
+#define HIDP_HEADER_TRANS_MASK			0xf0
+#define HIDP_HEADER_PARAM_MASK			0x0f
+
+/* HIDP transaction types */
+#define HIDP_TRANS_HANDSHAKE			0x00
+#define HIDP_TRANS_HID_CONTROL			0x10
+#define HIDP_TRANS_GET_REPORT			0x40
+#define HIDP_TRANS_SET_REPORT			0x50
+#define HIDP_TRANS_GET_PROTOCOL			0x60
+#define HIDP_TRANS_SET_PROTOCOL			0x70
+#define HIDP_TRANS_GET_IDLE			0x80
+#define HIDP_TRANS_SET_IDLE			0x90
+#define HIDP_TRANS_DATA				0xa0
+#define HIDP_TRANS_DATC				0xb0
+
+/* HIDP handshake results */
+#define HIDP_HSHK_SUCCESSFUL			0x00
+#define HIDP_HSHK_NOT_READY			0x01
+#define HIDP_HSHK_ERR_INVALID_REPORT_ID		0x02
+#define HIDP_HSHK_ERR_UNSUPPORTED_REQUEST	0x03
+#define HIDP_HSHK_ERR_INVALID_PARAMETER		0x04
+#define HIDP_HSHK_ERR_UNKNOWN			0x0e
+#define HIDP_HSHK_ERR_FATAL			0x0f
+
+/* HIDP control operation parameters */
+#define HIDP_CTRL_NOP				0x00
+#define HIDP_CTRL_HARD_RESET			0x01
+#define HIDP_CTRL_SOFT_RESET			0x02
+#define HIDP_CTRL_SUSPEND			0x03
+#define HIDP_CTRL_EXIT_SUSPEND			0x04
+#define HIDP_CTRL_VIRTUAL_CABLE_UNPLUG		0x05
+
+/* HIDP data transaction headers */
+#define HIDP_DATA_RTYPE_MASK			0x03
+#define HIDP_DATA_RSRVD_MASK			0x0c
+#define HIDP_DATA_RTYPE_OTHER			0x00
+#define HIDP_DATA_RTYPE_INPUT			0x01
+#define HIDP_DATA_RTYPE_OUPUT			0x02
+#define HIDP_DATA_RTYPE_FEATURE			0x03
+
+/* HIDP protocol header parameters */
+#define HIDP_PROTO_BOOT				0x00
+#define HIDP_PROTO_REPORT			0x01
+
+/* HIDP ioctl defines */
+#define HIDPCONNADD	_IOW('H', 200, int)
+#define HIDPCONNDEL	_IOW('H', 201, int)
+#define HIDPGETCONNLIST	_IOR('H', 210, int)
+#define HIDPGETCONNINFO	_IOR('H', 211, int)
+
+#define HIDP_VIRTUAL_CABLE_UNPLUG	0
+#define HIDP_BOOT_PROTOCOL_MODE		1
+#define HIDP_BLUETOOTH_VENDOR_ID	9
+#define HIDP_WAITING_FOR_RETURN		10
+#define HIDP_WAITING_FOR_SEND_ACK	11
+
+struct hidp_connadd_req {
+	int   ctrl_sock;	/* Connected control socket */
+	int   intr_sock;	/* Connected interrupt socket */
+	__u16 parser;
+	__u16 rd_size;
+	__u8 __user *rd_data;
+	__u8  country;
+	__u8  subclass;
+	__u16 vendor;
+	__u16 product;
+	__u16 version;
+	__u32 flags;
+	__u32 idle_to;
+	char  name[128];
+};
+
+struct hidp_conndel_req {
+	bdaddr_t bdaddr;
+	__u32    flags;
+};
+
+struct hidp_conninfo {
+	bdaddr_t bdaddr;
+	__u32    flags;
+	__u16    state;
+	__u16    vendor;
+	__u16    product;
+	__u16    version;
+	char     name[128];
+};
+
+struct hidp_connlist_req {
+	__u32  cnum;
+	struct hidp_conninfo __user *ci;
+};
+
+int hidp_connection_add(const struct hidp_connadd_req *req, struct socket *ctrl_sock, struct socket *intr_sock);
+int hidp_connection_del(struct hidp_conndel_req *req);
+int hidp_get_connlist(struct hidp_connlist_req *req);
+int hidp_get_conninfo(struct hidp_conninfo *ci);
+
+enum hidp_session_state {
+	HIDP_SESSION_IDLING,
+	HIDP_SESSION_PREPARING,
+	HIDP_SESSION_RUNNING,
+};
+
+/* HIDP session defines */
+struct hidp_session {
+	struct list_head list;
+	struct kref ref;
+
+	/* runtime management */
+	atomic_t state;
+	wait_queue_head_t state_queue;
+	atomic_t terminate;
+	struct task_struct *task;
+	unsigned long flags;
+
+	/* connection management */
+	bdaddr_t bdaddr;
+	struct l2cap_conn *conn;
+	struct l2cap_user user;
+	struct socket *ctrl_sock;
+	struct socket *intr_sock;
+	struct sk_buff_head ctrl_transmit;
+	struct sk_buff_head intr_transmit;
+	uint ctrl_mtu;
+	uint intr_mtu;
+	unsigned long idle_to;
+
+	/* device management */
+	struct work_struct dev_init;
+	struct input_dev *input;
+	struct hid_device *hid;
+	struct timer_list timer;
+
+	/* Report descriptor */
+	__u8 *rd_data;
+	uint rd_size;
+
+	/* session data */
+	unsigned char keys[8];
+	unsigned char leds;
+
+	/* Used in hidp_get_raw_report() */
+	int waiting_report_type; /* HIDP_DATA_RTYPE_* */
+	int waiting_report_number; /* -1 for not numbered */
+	struct mutex report_mutex;
+	struct sk_buff *report_return;
+	wait_queue_head_t report_queue;
+
+	/* Used in hidp_output_raw_report() */
+	int output_report_success; /* boolean */
+
+	/* temporary input buffer */
+	u8 input_buf[HID_MAX_BUFFER_SIZE];
+};
+
+/* HIDP init defines */
+int __init hidp_init_sockets(void);
+void __exit hidp_cleanup_sockets(void);
+
+#endif /* __HIDP_H */
diff --git a/net/bluetooth/hidp/sock.c b/net/bluetooth/hidp/sock.c
new file mode 100644
index 000000000..595fb3c9d
--- /dev/null
+++ b/net/bluetooth/hidp/sock.c
@@ -0,0 +1,319 @@
+/*
+   HIDP implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#include <linux/export.h>
+#include <linux/file.h>
+
+#include "hidp.h"
+
+static struct bt_sock_list hidp_sk_list = {
+	.lock = __RW_LOCK_UNLOCKED(hidp_sk_list.lock)
+};
+
+static int hidp_sock_release(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+
+	BT_DBG("sock %p sk %p", sock, sk);
+
+	if (!sk)
+		return 0;
+
+	bt_sock_unlink(&hidp_sk_list, sk);
+
+	sock_orphan(sk);
+	sock_put(sk);
+
+	return 0;
+}
+
+static int do_hidp_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp)
+{
+	struct hidp_connadd_req ca;
+	struct hidp_conndel_req cd;
+	struct hidp_connlist_req cl;
+	struct hidp_conninfo ci;
+	struct socket *csock;
+	struct socket *isock;
+	int err;
+
+	BT_DBG("cmd %x arg %p", cmd, argp);
+
+	switch (cmd) {
+	case HIDPCONNADD:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+
+		if (copy_from_user(&ca, argp, sizeof(ca)))
+			return -EFAULT;
+
+		csock = sockfd_lookup(ca.ctrl_sock, &err);
+		if (!csock)
+			return err;
+
+		isock = sockfd_lookup(ca.intr_sock, &err);
+		if (!isock) {
+			sockfd_put(csock);
+			return err;
+		}
+		ca.name[sizeof(ca.name)-1] = 0;
+
+		err = hidp_connection_add(&ca, csock, isock);
+		if (!err && copy_to_user(argp, &ca, sizeof(ca)))
+			err = -EFAULT;
+
+		sockfd_put(csock);
+		sockfd_put(isock);
+
+		return err;
+
+	case HIDPCONNDEL:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+
+		if (copy_from_user(&cd, argp, sizeof(cd)))
+			return -EFAULT;
+
+		return hidp_connection_del(&cd);
+
+	case HIDPGETCONNLIST:
+		if (copy_from_user(&cl, argp, sizeof(cl)))
+			return -EFAULT;
+
+		if (cl.cnum <= 0)
+			return -EINVAL;
+
+		err = hidp_get_connlist(&cl);
+		if (!err && copy_to_user(argp, &cl, sizeof(cl)))
+			return -EFAULT;
+
+		return err;
+
+	case HIDPGETCONNINFO:
+		if (copy_from_user(&ci, argp, sizeof(ci)))
+			return -EFAULT;
+
+		err = hidp_get_conninfo(&ci);
+		if (!err && copy_to_user(argp, &ci, sizeof(ci)))
+			return -EFAULT;
+
+		return err;
+	}
+
+	return -EINVAL;
+}
+
+static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+	return do_hidp_sock_ioctl(sock, cmd, (void __user *)arg);
+}
+
+#ifdef CONFIG_COMPAT
+struct compat_hidp_connadd_req {
+	int   ctrl_sock;	/* Connected control socket */
+	int   intr_sock;	/* Connected interrupt socket */
+	__u16 parser;
+	__u16 rd_size;
+	compat_uptr_t rd_data;
+	__u8  country;
+	__u8  subclass;
+	__u16 vendor;
+	__u16 product;
+	__u16 version;
+	__u32 flags;
+	__u32 idle_to;
+	char  name[128];
+};
+
+static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+	void __user *argp = compat_ptr(arg);
+	int err;
+
+	if (cmd == HIDPGETCONNLIST) {
+		struct hidp_connlist_req cl;
+		u32 __user *p = argp;
+		u32 uci;
+
+		if (get_user(cl.cnum, p) || get_user(uci, p + 1))
+			return -EFAULT;
+
+		cl.ci = compat_ptr(uci);
+
+		if (cl.cnum <= 0)
+			return -EINVAL;
+
+		err = hidp_get_connlist(&cl);
+
+		if (!err && put_user(cl.cnum, p))
+			err = -EFAULT;
+
+		return err;
+	} else if (cmd == HIDPCONNADD) {
+		struct compat_hidp_connadd_req ca32;
+		struct hidp_connadd_req ca;
+		struct socket *csock;
+		struct socket *isock;
+
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+
+		if (copy_from_user(&ca32, (void __user *) arg, sizeof(ca32)))
+			return -EFAULT;
+
+		ca.ctrl_sock = ca32.ctrl_sock;
+		ca.intr_sock = ca32.intr_sock;
+		ca.parser = ca32.parser;
+		ca.rd_size = ca32.rd_size;
+		ca.rd_data = compat_ptr(ca32.rd_data);
+		ca.country = ca32.country;
+		ca.subclass = ca32.subclass;
+		ca.vendor = ca32.vendor;
+		ca.product = ca32.product;
+		ca.version = ca32.version;
+		ca.flags = ca32.flags;
+		ca.idle_to = ca32.idle_to;
+		ca32.name[sizeof(ca32.name) - 1] = '\0';
+		memcpy(ca.name, ca32.name, 128);
+
+		csock = sockfd_lookup(ca.ctrl_sock, &err);
+		if (!csock)
+			return err;
+
+		isock = sockfd_lookup(ca.intr_sock, &err);
+		if (!isock) {
+			sockfd_put(csock);
+			return err;
+		}
+
+		err = hidp_connection_add(&ca, csock, isock);
+		if (!err && copy_to_user(argp, &ca32, sizeof(ca32)))
+			err = -EFAULT;
+
+		sockfd_put(csock);
+		sockfd_put(isock);
+
+		return err;
+	}
+
+	return hidp_sock_ioctl(sock, cmd, arg);
+}
+#endif
+
+static const struct proto_ops hidp_sock_ops = {
+	.family		= PF_BLUETOOTH,
+	.owner		= THIS_MODULE,
+	.release	= hidp_sock_release,
+	.ioctl		= hidp_sock_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= hidp_sock_compat_ioctl,
+#endif
+	.bind		= sock_no_bind,
+	.getname	= sock_no_getname,
+	.sendmsg	= sock_no_sendmsg,
+	.recvmsg	= sock_no_recvmsg,
+	.listen		= sock_no_listen,
+	.shutdown	= sock_no_shutdown,
+	.connect	= sock_no_connect,
+	.socketpair	= sock_no_socketpair,
+	.accept		= sock_no_accept,
+	.mmap		= sock_no_mmap
+};
+
+static struct proto hidp_proto = {
+	.name		= "HIDP",
+	.owner		= THIS_MODULE,
+	.obj_size	= sizeof(struct bt_sock)
+};
+
+static int hidp_sock_create(struct net *net, struct socket *sock, int protocol,
+			    int kern)
+{
+	struct sock *sk;
+
+	BT_DBG("sock %p", sock);
+
+	if (sock->type != SOCK_RAW)
+		return -ESOCKTNOSUPPORT;
+
+	sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto, kern);
+	if (!sk)
+		return -ENOMEM;
+
+	sock_init_data(sock, sk);
+
+	sock->ops = &hidp_sock_ops;
+
+	sock->state = SS_UNCONNECTED;
+
+	sock_reset_flag(sk, SOCK_ZAPPED);
+
+	sk->sk_protocol = protocol;
+	sk->sk_state	= BT_OPEN;
+
+	bt_sock_link(&hidp_sk_list, sk);
+
+	return 0;
+}
+
+static const struct net_proto_family hidp_sock_family_ops = {
+	.family	= PF_BLUETOOTH,
+	.owner	= THIS_MODULE,
+	.create	= hidp_sock_create
+};
+
+int __init hidp_init_sockets(void)
+{
+	int err;
+
+	err = proto_register(&hidp_proto, 0);
+	if (err < 0)
+		return err;
+
+	err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops);
+	if (err < 0) {
+		BT_ERR("Can't register HIDP socket");
+		goto error;
+	}
+
+	err = bt_procfs_init(&init_net, "hidp", &hidp_sk_list, NULL);
+	if (err < 0) {
+		BT_ERR("Failed to create HIDP proc file");
+		bt_sock_unregister(BTPROTO_HIDP);
+		goto error;
+	}
+
+	BT_INFO("HIDP socket layer initialized");
+
+	return 0;
+
+error:
+	proto_unregister(&hidp_proto);
+	return err;
+}
+
+void __exit hidp_cleanup_sockets(void)
+{
+	bt_procfs_cleanup(&init_net, "hidp");
+	bt_sock_unregister(BTPROTO_HIDP);
+	proto_unregister(&hidp_proto);
+}
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
new file mode 100644
index 000000000..cf78a4808
--- /dev/null
+++ b/net/bluetooth/l2cap_core.c
@@ -0,0 +1,8584 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2000-2001 Qualcomm Incorporated
+   Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org>
+   Copyright (C) 2010 Google Inc.
+   Copyright (C) 2011 ProFUSION Embedded Systems
+   Copyright (c) 2012 Code Aurora Forum.  All rights reserved.
+
+   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth L2CAP core. */
+
+#include <linux/module.h>
+
+#include <linux/debugfs.h>
+#include <linux/crc16.h>
+#include <linux/filter.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/l2cap.h>
+
+#include "smp.h"
+#include "a2mp.h"
+#include "amp.h"
+
+#define LE_FLOWCTL_MAX_CREDITS 65535
+
+bool disable_ertm;
+bool enable_ecred;
+
+static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN | L2CAP_FEAT_UCD;
+
+static LIST_HEAD(chan_list);
+static DEFINE_RWLOCK(chan_list_lock);
+
+static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn,
+				       u8 code, u8 ident, u16 dlen, void *data);
+static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len,
+			   void *data);
+static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data, size_t data_size);
+static void l2cap_send_disconn_req(struct l2cap_chan *chan, int err);
+
+static void l2cap_tx(struct l2cap_chan *chan, struct l2cap_ctrl *control,
+		     struct sk_buff_head *skbs, u8 event);
+static void l2cap_retrans_timeout(struct work_struct *work);
+static void l2cap_monitor_timeout(struct work_struct *work);
+static void l2cap_ack_timeout(struct work_struct *work);
+
+static inline u8 bdaddr_type(u8 link_type, u8 bdaddr_type)
+{
+	if (link_type == LE_LINK) {
+		if (bdaddr_type == ADDR_LE_DEV_PUBLIC)
+			return BDADDR_LE_PUBLIC;
+		else
+			return BDADDR_LE_RANDOM;
+	}
+
+	return BDADDR_BREDR;
+}
+
+static inline u8 bdaddr_src_type(struct hci_conn *hcon)
+{
+	return bdaddr_type(hcon->type, hcon->src_type);
+}
+
+static inline u8 bdaddr_dst_type(struct hci_conn *hcon)
+{
+	return bdaddr_type(hcon->type, hcon->dst_type);
+}
+
+/* ---- L2CAP channels ---- */
+
+static struct l2cap_chan *__l2cap_get_chan_by_dcid(struct l2cap_conn *conn,
+						   u16 cid)
+{
+	struct l2cap_chan *c;
+
+	list_for_each_entry(c, &conn->chan_l, list) {
+		if (c->dcid == cid)
+			return c;
+	}
+	return NULL;
+}
+
+static struct l2cap_chan *__l2cap_get_chan_by_scid(struct l2cap_conn *conn,
+						   u16 cid)
+{
+	struct l2cap_chan *c;
+
+	list_for_each_entry(c, &conn->chan_l, list) {
+		if (c->scid == cid)
+			return c;
+	}
+	return NULL;
+}
+
+/* Find channel with given SCID.
+ * Returns a reference locked channel.
+ */
+static struct l2cap_chan *l2cap_get_chan_by_scid(struct l2cap_conn *conn,
+						 u16 cid)
+{
+	struct l2cap_chan *c;
+
+	mutex_lock(&conn->chan_lock);
+	c = __l2cap_get_chan_by_scid(conn, cid);
+	if (c) {
+		/* Only lock if chan reference is not 0 */
+		c = l2cap_chan_hold_unless_zero(c);
+		if (c)
+			l2cap_chan_lock(c);
+	}
+	mutex_unlock(&conn->chan_lock);
+
+	return c;
+}
+
+/* Find channel with given DCID.
+ * Returns a reference locked channel.
+ */
+static struct l2cap_chan *l2cap_get_chan_by_dcid(struct l2cap_conn *conn,
+						 u16 cid)
+{
+	struct l2cap_chan *c;
+
+	mutex_lock(&conn->chan_lock);
+	c = __l2cap_get_chan_by_dcid(conn, cid);
+	if (c) {
+		/* Only lock if chan reference is not 0 */
+		c = l2cap_chan_hold_unless_zero(c);
+		if (c)
+			l2cap_chan_lock(c);
+	}
+	mutex_unlock(&conn->chan_lock);
+
+	return c;
+}
+
+static struct l2cap_chan *__l2cap_get_chan_by_ident(struct l2cap_conn *conn,
+						    u8 ident)
+{
+	struct l2cap_chan *c;
+
+	list_for_each_entry(c, &conn->chan_l, list) {
+		if (c->ident == ident)
+			return c;
+	}
+	return NULL;
+}
+
+static struct l2cap_chan *l2cap_get_chan_by_ident(struct l2cap_conn *conn,
+						  u8 ident)
+{
+	struct l2cap_chan *c;
+
+	mutex_lock(&conn->chan_lock);
+	c = __l2cap_get_chan_by_ident(conn, ident);
+	if (c) {
+		/* Only lock if chan reference is not 0 */
+		c = l2cap_chan_hold_unless_zero(c);
+		if (c)
+			l2cap_chan_lock(c);
+	}
+	mutex_unlock(&conn->chan_lock);
+
+	return c;
+}
+
+static struct l2cap_chan *__l2cap_global_chan_by_addr(__le16 psm, bdaddr_t *src,
+						      u8 src_type)
+{
+	struct l2cap_chan *c;
+
+	list_for_each_entry(c, &chan_list, global_l) {
+		if (src_type == BDADDR_BREDR && c->src_type != BDADDR_BREDR)
+			continue;
+
+		if (src_type != BDADDR_BREDR && c->src_type == BDADDR_BREDR)
+			continue;
+
+		if (c->sport == psm && !bacmp(&c->src, src))
+			return c;
+	}
+	return NULL;
+}
+
+int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm)
+{
+	int err;
+
+	write_lock(&chan_list_lock);
+
+	if (psm && __l2cap_global_chan_by_addr(psm, src, chan->src_type)) {
+		err = -EADDRINUSE;
+		goto done;
+	}
+
+	if (psm) {
+		chan->psm = psm;
+		chan->sport = psm;
+		err = 0;
+	} else {
+		u16 p, start, end, incr;
+
+		if (chan->src_type == BDADDR_BREDR) {
+			start = L2CAP_PSM_DYN_START;
+			end = L2CAP_PSM_AUTO_END;
+			incr = 2;
+		} else {
+			start = L2CAP_PSM_LE_DYN_START;
+			end = L2CAP_PSM_LE_DYN_END;
+			incr = 1;
+		}
+
+		err = -EINVAL;
+		for (p = start; p <= end; p += incr)
+			if (!__l2cap_global_chan_by_addr(cpu_to_le16(p), src,
+							 chan->src_type)) {
+				chan->psm   = cpu_to_le16(p);
+				chan->sport = cpu_to_le16(p);
+				err = 0;
+				break;
+			}
+	}
+
+done:
+	write_unlock(&chan_list_lock);
+	return err;
+}
+EXPORT_SYMBOL_GPL(l2cap_add_psm);
+
+int l2cap_add_scid(struct l2cap_chan *chan,  __u16 scid)
+{
+	write_lock(&chan_list_lock);
+
+	/* Override the defaults (which are for conn-oriented) */
+	chan->omtu = L2CAP_DEFAULT_MTU;
+	chan->chan_type = L2CAP_CHAN_FIXED;
+
+	chan->scid = scid;
+
+	write_unlock(&chan_list_lock);
+
+	return 0;
+}
+
+static u16 l2cap_alloc_cid(struct l2cap_conn *conn)
+{
+	u16 cid, dyn_end;
+
+	if (conn->hcon->type == LE_LINK)
+		dyn_end = L2CAP_CID_LE_DYN_END;
+	else
+		dyn_end = L2CAP_CID_DYN_END;
+
+	for (cid = L2CAP_CID_DYN_START; cid <= dyn_end; cid++) {
+		if (!__l2cap_get_chan_by_scid(conn, cid))
+			return cid;
+	}
+
+	return 0;
+}
+
+static void l2cap_state_change(struct l2cap_chan *chan, int state)
+{
+	BT_DBG("chan %p %s -> %s", chan, state_to_string(chan->state),
+	       state_to_string(state));
+
+	chan->state = state;
+	chan->ops->state_change(chan, state, 0);
+}
+
+static inline void l2cap_state_change_and_error(struct l2cap_chan *chan,
+						int state, int err)
+{
+	chan->state = state;
+	chan->ops->state_change(chan, chan->state, err);
+}
+
+static inline void l2cap_chan_set_err(struct l2cap_chan *chan, int err)
+{
+	chan->ops->state_change(chan, chan->state, err);
+}
+
+static void __set_retrans_timer(struct l2cap_chan *chan)
+{
+	if (!delayed_work_pending(&chan->monitor_timer) &&
+	    chan->retrans_timeout) {
+		l2cap_set_timer(chan, &chan->retrans_timer,
+				msecs_to_jiffies(chan->retrans_timeout));
+	}
+}
+
+static void __set_monitor_timer(struct l2cap_chan *chan)
+{
+	__clear_retrans_timer(chan);
+	if (chan->monitor_timeout) {
+		l2cap_set_timer(chan, &chan->monitor_timer,
+				msecs_to_jiffies(chan->monitor_timeout));
+	}
+}
+
+static struct sk_buff *l2cap_ertm_seq_in_queue(struct sk_buff_head *head,
+					       u16 seq)
+{
+	struct sk_buff *skb;
+
+	skb_queue_walk(head, skb) {
+		if (bt_cb(skb)->l2cap.txseq == seq)
+			return skb;
+	}
+
+	return NULL;
+}
+
+/* ---- L2CAP sequence number lists ---- */
+
+/* For ERTM, ordered lists of sequence numbers must be tracked for
+ * SREJ requests that are received and for frames that are to be
+ * retransmitted. These seq_list functions implement a singly-linked
+ * list in an array, where membership in the list can also be checked
+ * in constant time. Items can also be added to the tail of the list
+ * and removed from the head in constant time, without further memory
+ * allocs or frees.
+ */
+
+static int l2cap_seq_list_init(struct l2cap_seq_list *seq_list, u16 size)
+{
+	size_t alloc_size, i;
+
+	/* Allocated size is a power of 2 to map sequence numbers
+	 * (which may be up to 14 bits) in to a smaller array that is
+	 * sized for the negotiated ERTM transmit windows.
+	 */
+	alloc_size = roundup_pow_of_two(size);
+
+	seq_list->list = kmalloc_array(alloc_size, sizeof(u16), GFP_KERNEL);
+	if (!seq_list->list)
+		return -ENOMEM;
+
+	seq_list->mask = alloc_size - 1;
+	seq_list->head = L2CAP_SEQ_LIST_CLEAR;
+	seq_list->tail = L2CAP_SEQ_LIST_CLEAR;
+	for (i = 0; i < alloc_size; i++)
+		seq_list->list[i] = L2CAP_SEQ_LIST_CLEAR;
+
+	return 0;
+}
+
+static inline void l2cap_seq_list_free(struct l2cap_seq_list *seq_list)
+{
+	kfree(seq_list->list);
+}
+
+static inline bool l2cap_seq_list_contains(struct l2cap_seq_list *seq_list,
+					   u16 seq)
+{
+	/* Constant-time check for list membership */
+	return seq_list->list[seq & seq_list->mask] != L2CAP_SEQ_LIST_CLEAR;
+}
+
+static inline u16 l2cap_seq_list_pop(struct l2cap_seq_list *seq_list)
+{
+	u16 seq = seq_list->head;
+	u16 mask = seq_list->mask;
+
+	seq_list->head = seq_list->list[seq & mask];
+	seq_list->list[seq & mask] = L2CAP_SEQ_LIST_CLEAR;
+
+	if (seq_list->head == L2CAP_SEQ_LIST_TAIL) {
+		seq_list->head = L2CAP_SEQ_LIST_CLEAR;
+		seq_list->tail = L2CAP_SEQ_LIST_CLEAR;
+	}
+
+	return seq;
+}
+
+static void l2cap_seq_list_clear(struct l2cap_seq_list *seq_list)
+{
+	u16 i;
+
+	if (seq_list->head == L2CAP_SEQ_LIST_CLEAR)
+		return;
+
+	for (i = 0; i <= seq_list->mask; i++)
+		seq_list->list[i] = L2CAP_SEQ_LIST_CLEAR;
+
+	seq_list->head = L2CAP_SEQ_LIST_CLEAR;
+	seq_list->tail = L2CAP_SEQ_LIST_CLEAR;
+}
+
+static void l2cap_seq_list_append(struct l2cap_seq_list *seq_list, u16 seq)
+{
+	u16 mask = seq_list->mask;
+
+	/* All appends happen in constant time */
+
+	if (seq_list->list[seq & mask] != L2CAP_SEQ_LIST_CLEAR)
+		return;
+
+	if (seq_list->tail == L2CAP_SEQ_LIST_CLEAR)
+		seq_list->head = seq;
+	else
+		seq_list->list[seq_list->tail & mask] = seq;
+
+	seq_list->tail = seq;
+	seq_list->list[seq & mask] = L2CAP_SEQ_LIST_TAIL;
+}
+
+static void l2cap_chan_timeout(struct work_struct *work)
+{
+	struct l2cap_chan *chan = container_of(work, struct l2cap_chan,
+					       chan_timer.work);
+	struct l2cap_conn *conn = chan->conn;
+	int reason;
+
+	BT_DBG("chan %p state %s", chan, state_to_string(chan->state));
+
+	mutex_lock(&conn->chan_lock);
+	/* __set_chan_timer() calls l2cap_chan_hold(chan) while scheduling
+	 * this work. No need to call l2cap_chan_hold(chan) here again.
+	 */
+	l2cap_chan_lock(chan);
+
+	if (chan->state == BT_CONNECTED || chan->state == BT_CONFIG)
+		reason = ECONNREFUSED;
+	else if (chan->state == BT_CONNECT &&
+		 chan->sec_level != BT_SECURITY_SDP)
+		reason = ECONNREFUSED;
+	else
+		reason = ETIMEDOUT;
+
+	l2cap_chan_close(chan, reason);
+
+	chan->ops->close(chan);
+
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+
+	mutex_unlock(&conn->chan_lock);
+}
+
+struct l2cap_chan *l2cap_chan_create(void)
+{
+	struct l2cap_chan *chan;
+
+	chan = kzalloc(sizeof(*chan), GFP_ATOMIC);
+	if (!chan)
+		return NULL;
+
+	skb_queue_head_init(&chan->tx_q);
+	skb_queue_head_init(&chan->srej_q);
+	mutex_init(&chan->lock);
+
+	/* Set default lock nesting level */
+	atomic_set(&chan->nesting, L2CAP_NESTING_NORMAL);
+
+	write_lock(&chan_list_lock);
+	list_add(&chan->global_l, &chan_list);
+	write_unlock(&chan_list_lock);
+
+	INIT_DELAYED_WORK(&chan->chan_timer, l2cap_chan_timeout);
+	INIT_DELAYED_WORK(&chan->retrans_timer, l2cap_retrans_timeout);
+	INIT_DELAYED_WORK(&chan->monitor_timer, l2cap_monitor_timeout);
+	INIT_DELAYED_WORK(&chan->ack_timer, l2cap_ack_timeout);
+
+	chan->state = BT_OPEN;
+
+	kref_init(&chan->kref);
+
+	/* This flag is cleared in l2cap_chan_ready() */
+	set_bit(CONF_NOT_COMPLETE, &chan->conf_state);
+
+	BT_DBG("chan %p", chan);
+
+	return chan;
+}
+EXPORT_SYMBOL_GPL(l2cap_chan_create);
+
+static void l2cap_chan_destroy(struct kref *kref)
+{
+	struct l2cap_chan *chan = container_of(kref, struct l2cap_chan, kref);
+
+	BT_DBG("chan %p", chan);
+
+	write_lock(&chan_list_lock);
+	list_del(&chan->global_l);
+	write_unlock(&chan_list_lock);
+
+	kfree(chan);
+}
+
+void l2cap_chan_hold(struct l2cap_chan *c)
+{
+	BT_DBG("chan %p orig refcnt %d", c, kref_read(&c->kref));
+
+	kref_get(&c->kref);
+}
+
+struct l2cap_chan *l2cap_chan_hold_unless_zero(struct l2cap_chan *c)
+{
+	BT_DBG("chan %p orig refcnt %u", c, kref_read(&c->kref));
+
+	if (!kref_get_unless_zero(&c->kref))
+		return NULL;
+
+	return c;
+}
+
+void l2cap_chan_put(struct l2cap_chan *c)
+{
+	BT_DBG("chan %p orig refcnt %d", c, kref_read(&c->kref));
+
+	kref_put(&c->kref, l2cap_chan_destroy);
+}
+EXPORT_SYMBOL_GPL(l2cap_chan_put);
+
+void l2cap_chan_set_defaults(struct l2cap_chan *chan)
+{
+	chan->fcs  = L2CAP_FCS_CRC16;
+	chan->max_tx = L2CAP_DEFAULT_MAX_TX;
+	chan->tx_win = L2CAP_DEFAULT_TX_WINDOW;
+	chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW;
+	chan->remote_max_tx = chan->max_tx;
+	chan->remote_tx_win = chan->tx_win;
+	chan->ack_win = L2CAP_DEFAULT_TX_WINDOW;
+	chan->sec_level = BT_SECURITY_LOW;
+	chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;
+	chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO;
+	chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO;
+
+	chan->conf_state = 0;
+	set_bit(CONF_NOT_COMPLETE, &chan->conf_state);
+
+	set_bit(FLAG_FORCE_ACTIVE, &chan->flags);
+}
+EXPORT_SYMBOL_GPL(l2cap_chan_set_defaults);
+
+static void l2cap_le_flowctl_init(struct l2cap_chan *chan, u16 tx_credits)
+{
+	chan->sdu = NULL;
+	chan->sdu_last_frag = NULL;
+	chan->sdu_len = 0;
+	chan->tx_credits = tx_credits;
+	/* Derive MPS from connection MTU to stop HCI fragmentation */
+	chan->mps = min_t(u16, chan->imtu, chan->conn->mtu - L2CAP_HDR_SIZE);
+	/* Give enough credits for a full packet */
+	chan->rx_credits = (chan->imtu / chan->mps) + 1;
+
+	skb_queue_head_init(&chan->tx_q);
+}
+
+static void l2cap_ecred_init(struct l2cap_chan *chan, u16 tx_credits)
+{
+	l2cap_le_flowctl_init(chan, tx_credits);
+
+	/* L2CAP implementations shall support a minimum MPS of 64 octets */
+	if (chan->mps < L2CAP_ECRED_MIN_MPS) {
+		chan->mps = L2CAP_ECRED_MIN_MPS;
+		chan->rx_credits = (chan->imtu / chan->mps) + 1;
+	}
+}
+
+void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan)
+{
+	BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn,
+	       __le16_to_cpu(chan->psm), chan->dcid);
+
+	conn->disc_reason = HCI_ERROR_REMOTE_USER_TERM;
+
+	chan->conn = conn;
+
+	switch (chan->chan_type) {
+	case L2CAP_CHAN_CONN_ORIENTED:
+		/* Alloc CID for connection-oriented socket */
+		chan->scid = l2cap_alloc_cid(conn);
+		if (conn->hcon->type == ACL_LINK)
+			chan->omtu = L2CAP_DEFAULT_MTU;
+		break;
+
+	case L2CAP_CHAN_CONN_LESS:
+		/* Connectionless socket */
+		chan->scid = L2CAP_CID_CONN_LESS;
+		chan->dcid = L2CAP_CID_CONN_LESS;
+		chan->omtu = L2CAP_DEFAULT_MTU;
+		break;
+
+	case L2CAP_CHAN_FIXED:
+		/* Caller will set CID and CID specific MTU values */
+		break;
+
+	default:
+		/* Raw socket can send/recv signalling messages only */
+		chan->scid = L2CAP_CID_SIGNALING;
+		chan->dcid = L2CAP_CID_SIGNALING;
+		chan->omtu = L2CAP_DEFAULT_MTU;
+	}
+
+	chan->local_id		= L2CAP_BESTEFFORT_ID;
+	chan->local_stype	= L2CAP_SERV_BESTEFFORT;
+	chan->local_msdu	= L2CAP_DEFAULT_MAX_SDU_SIZE;
+	chan->local_sdu_itime	= L2CAP_DEFAULT_SDU_ITIME;
+	chan->local_acc_lat	= L2CAP_DEFAULT_ACC_LAT;
+	chan->local_flush_to	= L2CAP_EFS_DEFAULT_FLUSH_TO;
+
+	l2cap_chan_hold(chan);
+
+	/* Only keep a reference for fixed channels if they requested it */
+	if (chan->chan_type != L2CAP_CHAN_FIXED ||
+	    test_bit(FLAG_HOLD_HCI_CONN, &chan->flags))
+		hci_conn_hold(conn->hcon);
+
+	list_add(&chan->list, &conn->chan_l);
+}
+
+void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan)
+{
+	mutex_lock(&conn->chan_lock);
+	__l2cap_chan_add(conn, chan);
+	mutex_unlock(&conn->chan_lock);
+}
+
+void l2cap_chan_del(struct l2cap_chan *chan, int err)
+{
+	struct l2cap_conn *conn = chan->conn;
+
+	__clear_chan_timer(chan);
+
+	BT_DBG("chan %p, conn %p, err %d, state %s", chan, conn, err,
+	       state_to_string(chan->state));
+
+	chan->ops->teardown(chan, err);
+
+	if (conn) {
+		struct amp_mgr *mgr = conn->hcon->amp_mgr;
+		/* Delete from channel list */
+		list_del(&chan->list);
+
+		l2cap_chan_put(chan);
+
+		chan->conn = NULL;
+
+		/* Reference was only held for non-fixed channels or
+		 * fixed channels that explicitly requested it using the
+		 * FLAG_HOLD_HCI_CONN flag.
+		 */
+		if (chan->chan_type != L2CAP_CHAN_FIXED ||
+		    test_bit(FLAG_HOLD_HCI_CONN, &chan->flags))
+			hci_conn_drop(conn->hcon);
+
+		if (mgr && mgr->bredr_chan == chan)
+			mgr->bredr_chan = NULL;
+	}
+
+	if (chan->hs_hchan) {
+		struct hci_chan *hs_hchan = chan->hs_hchan;
+
+		BT_DBG("chan %p disconnect hs_hchan %p", chan, hs_hchan);
+		amp_disconnect_logical_link(hs_hchan);
+	}
+
+	if (test_bit(CONF_NOT_COMPLETE, &chan->conf_state))
+		return;
+
+	switch(chan->mode) {
+	case L2CAP_MODE_BASIC:
+		break;
+
+	case L2CAP_MODE_LE_FLOWCTL:
+	case L2CAP_MODE_EXT_FLOWCTL:
+		skb_queue_purge(&chan->tx_q);
+		break;
+
+	case L2CAP_MODE_ERTM:
+		__clear_retrans_timer(chan);
+		__clear_monitor_timer(chan);
+		__clear_ack_timer(chan);
+
+		skb_queue_purge(&chan->srej_q);
+
+		l2cap_seq_list_free(&chan->srej_list);
+		l2cap_seq_list_free(&chan->retrans_list);
+		fallthrough;
+
+	case L2CAP_MODE_STREAMING:
+		skb_queue_purge(&chan->tx_q);
+		break;
+	}
+
+	return;
+}
+EXPORT_SYMBOL_GPL(l2cap_chan_del);
+
+static void __l2cap_chan_list_id(struct l2cap_conn *conn, u16 id,
+				 l2cap_chan_func_t func, void *data)
+{
+	struct l2cap_chan *chan, *l;
+
+	list_for_each_entry_safe(chan, l, &conn->chan_l, list) {
+		if (chan->ident == id)
+			func(chan, data);
+	}
+}
+
+static void __l2cap_chan_list(struct l2cap_conn *conn, l2cap_chan_func_t func,
+			      void *data)
+{
+	struct l2cap_chan *chan;
+
+	list_for_each_entry(chan, &conn->chan_l, list) {
+		func(chan, data);
+	}
+}
+
+void l2cap_chan_list(struct l2cap_conn *conn, l2cap_chan_func_t func,
+		     void *data)
+{
+	if (!conn)
+		return;
+
+	mutex_lock(&conn->chan_lock);
+	__l2cap_chan_list(conn, func, data);
+	mutex_unlock(&conn->chan_lock);
+}
+
+EXPORT_SYMBOL_GPL(l2cap_chan_list);
+
+static void l2cap_conn_update_id_addr(struct work_struct *work)
+{
+	struct l2cap_conn *conn = container_of(work, struct l2cap_conn,
+					       id_addr_update_work);
+	struct hci_conn *hcon = conn->hcon;
+	struct l2cap_chan *chan;
+
+	mutex_lock(&conn->chan_lock);
+
+	list_for_each_entry(chan, &conn->chan_l, list) {
+		l2cap_chan_lock(chan);
+		bacpy(&chan->dst, &hcon->dst);
+		chan->dst_type = bdaddr_dst_type(hcon);
+		l2cap_chan_unlock(chan);
+	}
+
+	mutex_unlock(&conn->chan_lock);
+}
+
+static void l2cap_chan_le_connect_reject(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct l2cap_le_conn_rsp rsp;
+	u16 result;
+
+	if (test_bit(FLAG_DEFER_SETUP, &chan->flags))
+		result = L2CAP_CR_LE_AUTHORIZATION;
+	else
+		result = L2CAP_CR_LE_BAD_PSM;
+
+	l2cap_state_change(chan, BT_DISCONN);
+
+	rsp.dcid    = cpu_to_le16(chan->scid);
+	rsp.mtu     = cpu_to_le16(chan->imtu);
+	rsp.mps     = cpu_to_le16(chan->mps);
+	rsp.credits = cpu_to_le16(chan->rx_credits);
+	rsp.result  = cpu_to_le16(result);
+
+	l2cap_send_cmd(conn, chan->ident, L2CAP_LE_CONN_RSP, sizeof(rsp),
+		       &rsp);
+}
+
+static void l2cap_chan_ecred_connect_reject(struct l2cap_chan *chan)
+{
+	l2cap_state_change(chan, BT_DISCONN);
+
+	__l2cap_ecred_conn_rsp_defer(chan);
+}
+
+static void l2cap_chan_connect_reject(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct l2cap_conn_rsp rsp;
+	u16 result;
+
+	if (test_bit(FLAG_DEFER_SETUP, &chan->flags))
+		result = L2CAP_CR_SEC_BLOCK;
+	else
+		result = L2CAP_CR_BAD_PSM;
+
+	l2cap_state_change(chan, BT_DISCONN);
+
+	rsp.scid   = cpu_to_le16(chan->dcid);
+	rsp.dcid   = cpu_to_le16(chan->scid);
+	rsp.result = cpu_to_le16(result);
+	rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
+
+	l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp);
+}
+
+void l2cap_chan_close(struct l2cap_chan *chan, int reason)
+{
+	struct l2cap_conn *conn = chan->conn;
+
+	BT_DBG("chan %p state %s", chan, state_to_string(chan->state));
+
+	switch (chan->state) {
+	case BT_LISTEN:
+		chan->ops->teardown(chan, 0);
+		break;
+
+	case BT_CONNECTED:
+	case BT_CONFIG:
+		if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED) {
+			__set_chan_timer(chan, chan->ops->get_sndtimeo(chan));
+			l2cap_send_disconn_req(chan, reason);
+		} else
+			l2cap_chan_del(chan, reason);
+		break;
+
+	case BT_CONNECT2:
+		if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED) {
+			if (conn->hcon->type == ACL_LINK)
+				l2cap_chan_connect_reject(chan);
+			else if (conn->hcon->type == LE_LINK) {
+				switch (chan->mode) {
+				case L2CAP_MODE_LE_FLOWCTL:
+					l2cap_chan_le_connect_reject(chan);
+					break;
+				case L2CAP_MODE_EXT_FLOWCTL:
+					l2cap_chan_ecred_connect_reject(chan);
+					return;
+				}
+			}
+		}
+
+		l2cap_chan_del(chan, reason);
+		break;
+
+	case BT_CONNECT:
+	case BT_DISCONN:
+		l2cap_chan_del(chan, reason);
+		break;
+
+	default:
+		chan->ops->teardown(chan, 0);
+		break;
+	}
+}
+EXPORT_SYMBOL(l2cap_chan_close);
+
+static inline u8 l2cap_get_auth_type(struct l2cap_chan *chan)
+{
+	switch (chan->chan_type) {
+	case L2CAP_CHAN_RAW:
+		switch (chan->sec_level) {
+		case BT_SECURITY_HIGH:
+		case BT_SECURITY_FIPS:
+			return HCI_AT_DEDICATED_BONDING_MITM;
+		case BT_SECURITY_MEDIUM:
+			return HCI_AT_DEDICATED_BONDING;
+		default:
+			return HCI_AT_NO_BONDING;
+		}
+		break;
+	case L2CAP_CHAN_CONN_LESS:
+		if (chan->psm == cpu_to_le16(L2CAP_PSM_3DSP)) {
+			if (chan->sec_level == BT_SECURITY_LOW)
+				chan->sec_level = BT_SECURITY_SDP;
+		}
+		if (chan->sec_level == BT_SECURITY_HIGH ||
+		    chan->sec_level == BT_SECURITY_FIPS)
+			return HCI_AT_NO_BONDING_MITM;
+		else
+			return HCI_AT_NO_BONDING;
+		break;
+	case L2CAP_CHAN_CONN_ORIENTED:
+		if (chan->psm == cpu_to_le16(L2CAP_PSM_SDP)) {
+			if (chan->sec_level == BT_SECURITY_LOW)
+				chan->sec_level = BT_SECURITY_SDP;
+
+			if (chan->sec_level == BT_SECURITY_HIGH ||
+			    chan->sec_level == BT_SECURITY_FIPS)
+				return HCI_AT_NO_BONDING_MITM;
+			else
+				return HCI_AT_NO_BONDING;
+		}
+		fallthrough;
+
+	default:
+		switch (chan->sec_level) {
+		case BT_SECURITY_HIGH:
+		case BT_SECURITY_FIPS:
+			return HCI_AT_GENERAL_BONDING_MITM;
+		case BT_SECURITY_MEDIUM:
+			return HCI_AT_GENERAL_BONDING;
+		default:
+			return HCI_AT_NO_BONDING;
+		}
+		break;
+	}
+}
+
+/* Service level security */
+int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator)
+{
+	struct l2cap_conn *conn = chan->conn;
+	__u8 auth_type;
+
+	if (conn->hcon->type == LE_LINK)
+		return smp_conn_security(conn->hcon, chan->sec_level);
+
+	auth_type = l2cap_get_auth_type(chan);
+
+	return hci_conn_security(conn->hcon, chan->sec_level, auth_type,
+				 initiator);
+}
+
+static u8 l2cap_get_ident(struct l2cap_conn *conn)
+{
+	u8 id;
+
+	/* Get next available identificator.
+	 *    1 - 128 are used by kernel.
+	 *  129 - 199 are reserved.
+	 *  200 - 254 are used by utilities like l2ping, etc.
+	 */
+
+	mutex_lock(&conn->ident_lock);
+
+	if (++conn->tx_ident > 128)
+		conn->tx_ident = 1;
+
+	id = conn->tx_ident;
+
+	mutex_unlock(&conn->ident_lock);
+
+	return id;
+}
+
+static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len,
+			   void *data)
+{
+	struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data);
+	u8 flags;
+
+	BT_DBG("code 0x%2.2x", code);
+
+	if (!skb)
+		return;
+
+	/* Use NO_FLUSH if supported or we have an LE link (which does
+	 * not support auto-flushing packets) */
+	if (lmp_no_flush_capable(conn->hcon->hdev) ||
+	    conn->hcon->type == LE_LINK)
+		flags = ACL_START_NO_FLUSH;
+	else
+		flags = ACL_START;
+
+	bt_cb(skb)->force_active = BT_POWER_FORCE_ACTIVE_ON;
+	skb->priority = HCI_PRIO_MAX;
+
+	hci_send_acl(conn->hchan, skb, flags);
+}
+
+static bool __chan_is_moving(struct l2cap_chan *chan)
+{
+	return chan->move_state != L2CAP_MOVE_STABLE &&
+	       chan->move_state != L2CAP_MOVE_WAIT_PREPARE;
+}
+
+static void l2cap_do_send(struct l2cap_chan *chan, struct sk_buff *skb)
+{
+	struct hci_conn *hcon = chan->conn->hcon;
+	u16 flags;
+
+	BT_DBG("chan %p, skb %p len %d priority %u", chan, skb, skb->len,
+	       skb->priority);
+
+	if (chan->hs_hcon && !__chan_is_moving(chan)) {
+		if (chan->hs_hchan)
+			hci_send_acl(chan->hs_hchan, skb, ACL_COMPLETE);
+		else
+			kfree_skb(skb);
+
+		return;
+	}
+
+	/* Use NO_FLUSH for LE links (where this is the only option) or
+	 * if the BR/EDR link supports it and flushing has not been
+	 * explicitly requested (through FLAG_FLUSHABLE).
+	 */
+	if (hcon->type == LE_LINK ||
+	    (!test_bit(FLAG_FLUSHABLE, &chan->flags) &&
+	     lmp_no_flush_capable(hcon->hdev)))
+		flags = ACL_START_NO_FLUSH;
+	else
+		flags = ACL_START;
+
+	bt_cb(skb)->force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags);
+	hci_send_acl(chan->conn->hchan, skb, flags);
+}
+
+static void __unpack_enhanced_control(u16 enh, struct l2cap_ctrl *control)
+{
+	control->reqseq = (enh & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT;
+	control->final = (enh & L2CAP_CTRL_FINAL) >> L2CAP_CTRL_FINAL_SHIFT;
+
+	if (enh & L2CAP_CTRL_FRAME_TYPE) {
+		/* S-Frame */
+		control->sframe = 1;
+		control->poll = (enh & L2CAP_CTRL_POLL) >> L2CAP_CTRL_POLL_SHIFT;
+		control->super = (enh & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT;
+
+		control->sar = 0;
+		control->txseq = 0;
+	} else {
+		/* I-Frame */
+		control->sframe = 0;
+		control->sar = (enh & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT;
+		control->txseq = (enh & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT;
+
+		control->poll = 0;
+		control->super = 0;
+	}
+}
+
+static void __unpack_extended_control(u32 ext, struct l2cap_ctrl *control)
+{
+	control->reqseq = (ext & L2CAP_EXT_CTRL_REQSEQ) >> L2CAP_EXT_CTRL_REQSEQ_SHIFT;
+	control->final = (ext & L2CAP_EXT_CTRL_FINAL) >> L2CAP_EXT_CTRL_FINAL_SHIFT;
+
+	if (ext & L2CAP_EXT_CTRL_FRAME_TYPE) {
+		/* S-Frame */
+		control->sframe = 1;
+		control->poll = (ext & L2CAP_EXT_CTRL_POLL) >> L2CAP_EXT_CTRL_POLL_SHIFT;
+		control->super = (ext & L2CAP_EXT_CTRL_SUPERVISE) >> L2CAP_EXT_CTRL_SUPER_SHIFT;
+
+		control->sar = 0;
+		control->txseq = 0;
+	} else {
+		/* I-Frame */
+		control->sframe = 0;
+		control->sar = (ext & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT;
+		control->txseq = (ext & L2CAP_EXT_CTRL_TXSEQ) >> L2CAP_EXT_CTRL_TXSEQ_SHIFT;
+
+		control->poll = 0;
+		control->super = 0;
+	}
+}
+
+static inline void __unpack_control(struct l2cap_chan *chan,
+				    struct sk_buff *skb)
+{
+	if (test_bit(FLAG_EXT_CTRL, &chan->flags)) {
+		__unpack_extended_control(get_unaligned_le32(skb->data),
+					  &bt_cb(skb)->l2cap);
+		skb_pull(skb, L2CAP_EXT_CTRL_SIZE);
+	} else {
+		__unpack_enhanced_control(get_unaligned_le16(skb->data),
+					  &bt_cb(skb)->l2cap);
+		skb_pull(skb, L2CAP_ENH_CTRL_SIZE);
+	}
+}
+
+static u32 __pack_extended_control(struct l2cap_ctrl *control)
+{
+	u32 packed;
+
+	packed = control->reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT;
+	packed |= control->final << L2CAP_EXT_CTRL_FINAL_SHIFT;
+
+	if (control->sframe) {
+		packed |= control->poll << L2CAP_EXT_CTRL_POLL_SHIFT;
+		packed |= control->super << L2CAP_EXT_CTRL_SUPER_SHIFT;
+		packed |= L2CAP_EXT_CTRL_FRAME_TYPE;
+	} else {
+		packed |= control->sar << L2CAP_EXT_CTRL_SAR_SHIFT;
+		packed |= control->txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT;
+	}
+
+	return packed;
+}
+
+static u16 __pack_enhanced_control(struct l2cap_ctrl *control)
+{
+	u16 packed;
+
+	packed = control->reqseq << L2CAP_CTRL_REQSEQ_SHIFT;
+	packed |= control->final << L2CAP_CTRL_FINAL_SHIFT;
+
+	if (control->sframe) {
+		packed |= control->poll << L2CAP_CTRL_POLL_SHIFT;
+		packed |= control->super << L2CAP_CTRL_SUPER_SHIFT;
+		packed |= L2CAP_CTRL_FRAME_TYPE;
+	} else {
+		packed |= control->sar << L2CAP_CTRL_SAR_SHIFT;
+		packed |= control->txseq << L2CAP_CTRL_TXSEQ_SHIFT;
+	}
+
+	return packed;
+}
+
+static inline void __pack_control(struct l2cap_chan *chan,
+				  struct l2cap_ctrl *control,
+				  struct sk_buff *skb)
+{
+	if (test_bit(FLAG_EXT_CTRL, &chan->flags)) {
+		put_unaligned_le32(__pack_extended_control(control),
+				   skb->data + L2CAP_HDR_SIZE);
+	} else {
+		put_unaligned_le16(__pack_enhanced_control(control),
+				   skb->data + L2CAP_HDR_SIZE);
+	}
+}
+
+static inline unsigned int __ertm_hdr_size(struct l2cap_chan *chan)
+{
+	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
+		return L2CAP_EXT_HDR_SIZE;
+	else
+		return L2CAP_ENH_HDR_SIZE;
+}
+
+static struct sk_buff *l2cap_create_sframe_pdu(struct l2cap_chan *chan,
+					       u32 control)
+{
+	struct sk_buff *skb;
+	struct l2cap_hdr *lh;
+	int hlen = __ertm_hdr_size(chan);
+
+	if (chan->fcs == L2CAP_FCS_CRC16)
+		hlen += L2CAP_FCS_SIZE;
+
+	skb = bt_skb_alloc(hlen, GFP_KERNEL);
+
+	if (!skb)
+		return ERR_PTR(-ENOMEM);
+
+	lh = skb_put(skb, L2CAP_HDR_SIZE);
+	lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE);
+	lh->cid = cpu_to_le16(chan->dcid);
+
+	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
+		put_unaligned_le32(control, skb_put(skb, L2CAP_EXT_CTRL_SIZE));
+	else
+		put_unaligned_le16(control, skb_put(skb, L2CAP_ENH_CTRL_SIZE));
+
+	if (chan->fcs == L2CAP_FCS_CRC16) {
+		u16 fcs = crc16(0, (u8 *)skb->data, skb->len);
+		put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE));
+	}
+
+	skb->priority = HCI_PRIO_MAX;
+	return skb;
+}
+
+static void l2cap_send_sframe(struct l2cap_chan *chan,
+			      struct l2cap_ctrl *control)
+{
+	struct sk_buff *skb;
+	u32 control_field;
+
+	BT_DBG("chan %p, control %p", chan, control);
+
+	if (!control->sframe)
+		return;
+
+	if (__chan_is_moving(chan))
+		return;
+
+	if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state) &&
+	    !control->poll)
+		control->final = 1;
+
+	if (control->super == L2CAP_SUPER_RR)
+		clear_bit(CONN_RNR_SENT, &chan->conn_state);
+	else if (control->super == L2CAP_SUPER_RNR)
+		set_bit(CONN_RNR_SENT, &chan->conn_state);
+
+	if (control->super != L2CAP_SUPER_SREJ) {
+		chan->last_acked_seq = control->reqseq;
+		__clear_ack_timer(chan);
+	}
+
+	BT_DBG("reqseq %d, final %d, poll %d, super %d", control->reqseq,
+	       control->final, control->poll, control->super);
+
+	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
+		control_field = __pack_extended_control(control);
+	else
+		control_field = __pack_enhanced_control(control);
+
+	skb = l2cap_create_sframe_pdu(chan, control_field);
+	if (!IS_ERR(skb))
+		l2cap_do_send(chan, skb);
+}
+
+static void l2cap_send_rr_or_rnr(struct l2cap_chan *chan, bool poll)
+{
+	struct l2cap_ctrl control;
+
+	BT_DBG("chan %p, poll %d", chan, poll);
+
+	memset(&control, 0, sizeof(control));
+	control.sframe = 1;
+	control.poll = poll;
+
+	if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state))
+		control.super = L2CAP_SUPER_RNR;
+	else
+		control.super = L2CAP_SUPER_RR;
+
+	control.reqseq = chan->buffer_seq;
+	l2cap_send_sframe(chan, &control);
+}
+
+static inline int __l2cap_no_conn_pending(struct l2cap_chan *chan)
+{
+	if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED)
+		return true;
+
+	return !test_bit(CONF_CONNECT_PEND, &chan->conf_state);
+}
+
+static bool __amp_capable(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct hci_dev *hdev;
+	bool amp_available = false;
+
+	if (!(conn->local_fixed_chan & L2CAP_FC_A2MP))
+		return false;
+
+	if (!(conn->remote_fixed_chan & L2CAP_FC_A2MP))
+		return false;
+
+	read_lock(&hci_dev_list_lock);
+	list_for_each_entry(hdev, &hci_dev_list, list) {
+		if (hdev->amp_type != AMP_TYPE_BREDR &&
+		    test_bit(HCI_UP, &hdev->flags)) {
+			amp_available = true;
+			break;
+		}
+	}
+	read_unlock(&hci_dev_list_lock);
+
+	if (chan->chan_policy == BT_CHANNEL_POLICY_AMP_PREFERRED)
+		return amp_available;
+
+	return false;
+}
+
+static bool l2cap_check_efs(struct l2cap_chan *chan)
+{
+	/* Check EFS parameters */
+	return true;
+}
+
+void l2cap_send_conn_req(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct l2cap_conn_req req;
+
+	req.scid = cpu_to_le16(chan->scid);
+	req.psm  = chan->psm;
+
+	chan->ident = l2cap_get_ident(conn);
+
+	set_bit(CONF_CONNECT_PEND, &chan->conf_state);
+
+	l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, sizeof(req), &req);
+}
+
+static void l2cap_send_create_chan_req(struct l2cap_chan *chan, u8 amp_id)
+{
+	struct l2cap_create_chan_req req;
+	req.scid = cpu_to_le16(chan->scid);
+	req.psm  = chan->psm;
+	req.amp_id = amp_id;
+
+	chan->ident = l2cap_get_ident(chan->conn);
+
+	l2cap_send_cmd(chan->conn, chan->ident, L2CAP_CREATE_CHAN_REQ,
+		       sizeof(req), &req);
+}
+
+static void l2cap_move_setup(struct l2cap_chan *chan)
+{
+	struct sk_buff *skb;
+
+	BT_DBG("chan %p", chan);
+
+	if (chan->mode != L2CAP_MODE_ERTM)
+		return;
+
+	__clear_retrans_timer(chan);
+	__clear_monitor_timer(chan);
+	__clear_ack_timer(chan);
+
+	chan->retry_count = 0;
+	skb_queue_walk(&chan->tx_q, skb) {
+		if (bt_cb(skb)->l2cap.retries)
+			bt_cb(skb)->l2cap.retries = 1;
+		else
+			break;
+	}
+
+	chan->expected_tx_seq = chan->buffer_seq;
+
+	clear_bit(CONN_REJ_ACT, &chan->conn_state);
+	clear_bit(CONN_SREJ_ACT, &chan->conn_state);
+	l2cap_seq_list_clear(&chan->retrans_list);
+	l2cap_seq_list_clear(&chan->srej_list);
+	skb_queue_purge(&chan->srej_q);
+
+	chan->tx_state = L2CAP_TX_STATE_XMIT;
+	chan->rx_state = L2CAP_RX_STATE_MOVE;
+
+	set_bit(CONN_REMOTE_BUSY, &chan->conn_state);
+}
+
+static void l2cap_move_done(struct l2cap_chan *chan)
+{
+	u8 move_role = chan->move_role;
+	BT_DBG("chan %p", chan);
+
+	chan->move_state = L2CAP_MOVE_STABLE;
+	chan->move_role = L2CAP_MOVE_ROLE_NONE;
+
+	if (chan->mode != L2CAP_MODE_ERTM)
+		return;
+
+	switch (move_role) {
+	case L2CAP_MOVE_ROLE_INITIATOR:
+		l2cap_tx(chan, NULL, NULL, L2CAP_EV_EXPLICIT_POLL);
+		chan->rx_state = L2CAP_RX_STATE_WAIT_F;
+		break;
+	case L2CAP_MOVE_ROLE_RESPONDER:
+		chan->rx_state = L2CAP_RX_STATE_WAIT_P;
+		break;
+	}
+}
+
+static void l2cap_chan_ready(struct l2cap_chan *chan)
+{
+	/* The channel may have already been flagged as connected in
+	 * case of receiving data before the L2CAP info req/rsp
+	 * procedure is complete.
+	 */
+	if (chan->state == BT_CONNECTED)
+		return;
+
+	/* This clears all conf flags, including CONF_NOT_COMPLETE */
+	chan->conf_state = 0;
+	__clear_chan_timer(chan);
+
+	switch (chan->mode) {
+	case L2CAP_MODE_LE_FLOWCTL:
+	case L2CAP_MODE_EXT_FLOWCTL:
+		if (!chan->tx_credits)
+			chan->ops->suspend(chan);
+		break;
+	}
+
+	chan->state = BT_CONNECTED;
+
+	chan->ops->ready(chan);
+}
+
+static void l2cap_le_connect(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct l2cap_le_conn_req req;
+
+	if (test_and_set_bit(FLAG_LE_CONN_REQ_SENT, &chan->flags))
+		return;
+
+	if (!chan->imtu)
+		chan->imtu = chan->conn->mtu;
+
+	l2cap_le_flowctl_init(chan, 0);
+
+	req.psm     = chan->psm;
+	req.scid    = cpu_to_le16(chan->scid);
+	req.mtu     = cpu_to_le16(chan->imtu);
+	req.mps     = cpu_to_le16(chan->mps);
+	req.credits = cpu_to_le16(chan->rx_credits);
+
+	chan->ident = l2cap_get_ident(conn);
+
+	l2cap_send_cmd(conn, chan->ident, L2CAP_LE_CONN_REQ,
+		       sizeof(req), &req);
+}
+
+struct l2cap_ecred_conn_data {
+	struct {
+		struct l2cap_ecred_conn_req req;
+		__le16 scid[5];
+	} __packed pdu;
+	struct l2cap_chan *chan;
+	struct pid *pid;
+	int count;
+};
+
+static void l2cap_ecred_defer_connect(struct l2cap_chan *chan, void *data)
+{
+	struct l2cap_ecred_conn_data *conn = data;
+	struct pid *pid;
+
+	if (chan == conn->chan)
+		return;
+
+	if (!test_and_clear_bit(FLAG_DEFER_SETUP, &chan->flags))
+		return;
+
+	pid = chan->ops->get_peer_pid(chan);
+
+	/* Only add deferred channels with the same PID/PSM */
+	if (conn->pid != pid || chan->psm != conn->chan->psm || chan->ident ||
+	    chan->mode != L2CAP_MODE_EXT_FLOWCTL || chan->state != BT_CONNECT)
+		return;
+
+	if (test_and_set_bit(FLAG_ECRED_CONN_REQ_SENT, &chan->flags))
+		return;
+
+	l2cap_ecred_init(chan, 0);
+
+	/* Set the same ident so we can match on the rsp */
+	chan->ident = conn->chan->ident;
+
+	/* Include all channels deferred */
+	conn->pdu.scid[conn->count] = cpu_to_le16(chan->scid);
+
+	conn->count++;
+}
+
+static void l2cap_ecred_connect(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct l2cap_ecred_conn_data data;
+
+	if (test_bit(FLAG_DEFER_SETUP, &chan->flags))
+		return;
+
+	if (test_and_set_bit(FLAG_ECRED_CONN_REQ_SENT, &chan->flags))
+		return;
+
+	l2cap_ecred_init(chan, 0);
+
+	memset(&data, 0, sizeof(data));
+	data.pdu.req.psm     = chan->psm;
+	data.pdu.req.mtu     = cpu_to_le16(chan->imtu);
+	data.pdu.req.mps     = cpu_to_le16(chan->mps);
+	data.pdu.req.credits = cpu_to_le16(chan->rx_credits);
+	data.pdu.scid[0]     = cpu_to_le16(chan->scid);
+
+	chan->ident = l2cap_get_ident(conn);
+	data.pid = chan->ops->get_peer_pid(chan);
+
+	data.count = 1;
+	data.chan = chan;
+	data.pid = chan->ops->get_peer_pid(chan);
+
+	__l2cap_chan_list(conn, l2cap_ecred_defer_connect, &data);
+
+	l2cap_send_cmd(conn, chan->ident, L2CAP_ECRED_CONN_REQ,
+		       sizeof(data.pdu.req) + data.count * sizeof(__le16),
+		       &data.pdu);
+}
+
+static void l2cap_le_start(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+
+	if (!smp_conn_security(conn->hcon, chan->sec_level))
+		return;
+
+	if (!chan->psm) {
+		l2cap_chan_ready(chan);
+		return;
+	}
+
+	if (chan->state == BT_CONNECT) {
+		if (chan->mode == L2CAP_MODE_EXT_FLOWCTL)
+			l2cap_ecred_connect(chan);
+		else
+			l2cap_le_connect(chan);
+	}
+}
+
+static void l2cap_start_connection(struct l2cap_chan *chan)
+{
+	if (__amp_capable(chan)) {
+		BT_DBG("chan %p AMP capable: discover AMPs", chan);
+		a2mp_discover_amp(chan);
+	} else if (chan->conn->hcon->type == LE_LINK) {
+		l2cap_le_start(chan);
+	} else {
+		l2cap_send_conn_req(chan);
+	}
+}
+
+static void l2cap_request_info(struct l2cap_conn *conn)
+{
+	struct l2cap_info_req req;
+
+	if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT)
+		return;
+
+	req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK);
+
+	conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT;
+	conn->info_ident = l2cap_get_ident(conn);
+
+	schedule_delayed_work(&conn->info_timer, L2CAP_INFO_TIMEOUT);
+
+	l2cap_send_cmd(conn, conn->info_ident, L2CAP_INFO_REQ,
+		       sizeof(req), &req);
+}
+
+static bool l2cap_check_enc_key_size(struct hci_conn *hcon)
+{
+	/* The minimum encryption key size needs to be enforced by the
+	 * host stack before establishing any L2CAP connections. The
+	 * specification in theory allows a minimum of 1, but to align
+	 * BR/EDR and LE transports, a minimum of 7 is chosen.
+	 *
+	 * This check might also be called for unencrypted connections
+	 * that have no key size requirements. Ensure that the link is
+	 * actually encrypted before enforcing a key size.
+	 */
+	return (!test_bit(HCI_CONN_ENCRYPT, &hcon->flags) ||
+		hcon->enc_key_size >= hcon->hdev->min_enc_key_size);
+}
+
+static void l2cap_do_start(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+
+	if (conn->hcon->type == LE_LINK) {
+		l2cap_le_start(chan);
+		return;
+	}
+
+	if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT)) {
+		l2cap_request_info(conn);
+		return;
+	}
+
+	if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE))
+		return;
+
+	if (!l2cap_chan_check_security(chan, true) ||
+	    !__l2cap_no_conn_pending(chan))
+		return;
+
+	if (l2cap_check_enc_key_size(conn->hcon))
+		l2cap_start_connection(chan);
+	else
+		__set_chan_timer(chan, L2CAP_DISC_TIMEOUT);
+}
+
+static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask)
+{
+	u32 local_feat_mask = l2cap_feat_mask;
+	if (!disable_ertm)
+		local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING;
+
+	switch (mode) {
+	case L2CAP_MODE_ERTM:
+		return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask;
+	case L2CAP_MODE_STREAMING:
+		return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask;
+	default:
+		return 0x00;
+	}
+}
+
+static void l2cap_send_disconn_req(struct l2cap_chan *chan, int err)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct l2cap_disconn_req req;
+
+	if (!conn)
+		return;
+
+	if (chan->mode == L2CAP_MODE_ERTM && chan->state == BT_CONNECTED) {
+		__clear_retrans_timer(chan);
+		__clear_monitor_timer(chan);
+		__clear_ack_timer(chan);
+	}
+
+	if (chan->scid == L2CAP_CID_A2MP) {
+		l2cap_state_change(chan, BT_DISCONN);
+		return;
+	}
+
+	req.dcid = cpu_to_le16(chan->dcid);
+	req.scid = cpu_to_le16(chan->scid);
+	l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_DISCONN_REQ,
+		       sizeof(req), &req);
+
+	l2cap_state_change_and_error(chan, BT_DISCONN, err);
+}
+
+/* ---- L2CAP connections ---- */
+static void l2cap_conn_start(struct l2cap_conn *conn)
+{
+	struct l2cap_chan *chan, *tmp;
+
+	BT_DBG("conn %p", conn);
+
+	mutex_lock(&conn->chan_lock);
+
+	list_for_each_entry_safe(chan, tmp, &conn->chan_l, list) {
+		l2cap_chan_lock(chan);
+
+		if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
+			l2cap_chan_ready(chan);
+			l2cap_chan_unlock(chan);
+			continue;
+		}
+
+		if (chan->state == BT_CONNECT) {
+			if (!l2cap_chan_check_security(chan, true) ||
+			    !__l2cap_no_conn_pending(chan)) {
+				l2cap_chan_unlock(chan);
+				continue;
+			}
+
+			if (!l2cap_mode_supported(chan->mode, conn->feat_mask)
+			    && test_bit(CONF_STATE2_DEVICE,
+					&chan->conf_state)) {
+				l2cap_chan_close(chan, ECONNRESET);
+				l2cap_chan_unlock(chan);
+				continue;
+			}
+
+			if (l2cap_check_enc_key_size(conn->hcon))
+				l2cap_start_connection(chan);
+			else
+				l2cap_chan_close(chan, ECONNREFUSED);
+
+		} else if (chan->state == BT_CONNECT2) {
+			struct l2cap_conn_rsp rsp;
+			char buf[128];
+			rsp.scid = cpu_to_le16(chan->dcid);
+			rsp.dcid = cpu_to_le16(chan->scid);
+
+			if (l2cap_chan_check_security(chan, false)) {
+				if (test_bit(FLAG_DEFER_SETUP, &chan->flags)) {
+					rsp.result = cpu_to_le16(L2CAP_CR_PEND);
+					rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND);
+					chan->ops->defer(chan);
+
+				} else {
+					l2cap_state_change(chan, BT_CONFIG);
+					rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS);
+					rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
+				}
+			} else {
+				rsp.result = cpu_to_le16(L2CAP_CR_PEND);
+				rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND);
+			}
+
+			l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP,
+				       sizeof(rsp), &rsp);
+
+			if (test_bit(CONF_REQ_SENT, &chan->conf_state) ||
+			    rsp.result != L2CAP_CR_SUCCESS) {
+				l2cap_chan_unlock(chan);
+				continue;
+			}
+
+			set_bit(CONF_REQ_SENT, &chan->conf_state);
+			l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
+				       l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
+			chan->num_conf_req++;
+		}
+
+		l2cap_chan_unlock(chan);
+	}
+
+	mutex_unlock(&conn->chan_lock);
+}
+
+static void l2cap_le_conn_ready(struct l2cap_conn *conn)
+{
+	struct hci_conn *hcon = conn->hcon;
+	struct hci_dev *hdev = hcon->hdev;
+
+	BT_DBG("%s conn %p", hdev->name, conn);
+
+	/* For outgoing pairing which doesn't necessarily have an
+	 * associated socket (e.g. mgmt_pair_device).
+	 */
+	if (hcon->out)
+		smp_conn_security(hcon, hcon->pending_sec_level);
+
+	/* For LE peripheral connections, make sure the connection interval
+	 * is in the range of the minimum and maximum interval that has
+	 * been configured for this connection. If not, then trigger
+	 * the connection update procedure.
+	 */
+	if (hcon->role == HCI_ROLE_SLAVE &&
+	    (hcon->le_conn_interval < hcon->le_conn_min_interval ||
+	     hcon->le_conn_interval > hcon->le_conn_max_interval)) {
+		struct l2cap_conn_param_update_req req;
+
+		req.min = cpu_to_le16(hcon->le_conn_min_interval);
+		req.max = cpu_to_le16(hcon->le_conn_max_interval);
+		req.latency = cpu_to_le16(hcon->le_conn_latency);
+		req.to_multiplier = cpu_to_le16(hcon->le_supv_timeout);
+
+		l2cap_send_cmd(conn, l2cap_get_ident(conn),
+			       L2CAP_CONN_PARAM_UPDATE_REQ, sizeof(req), &req);
+	}
+}
+
+static void l2cap_conn_ready(struct l2cap_conn *conn)
+{
+	struct l2cap_chan *chan;
+	struct hci_conn *hcon = conn->hcon;
+
+	BT_DBG("conn %p", conn);
+
+	if (hcon->type == ACL_LINK)
+		l2cap_request_info(conn);
+
+	mutex_lock(&conn->chan_lock);
+
+	list_for_each_entry(chan, &conn->chan_l, list) {
+
+		l2cap_chan_lock(chan);
+
+		if (chan->scid == L2CAP_CID_A2MP) {
+			l2cap_chan_unlock(chan);
+			continue;
+		}
+
+		if (hcon->type == LE_LINK) {
+			l2cap_le_start(chan);
+		} else if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
+			if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)
+				l2cap_chan_ready(chan);
+		} else if (chan->state == BT_CONNECT) {
+			l2cap_do_start(chan);
+		}
+
+		l2cap_chan_unlock(chan);
+	}
+
+	mutex_unlock(&conn->chan_lock);
+
+	if (hcon->type == LE_LINK)
+		l2cap_le_conn_ready(conn);
+
+	queue_work(hcon->hdev->workqueue, &conn->pending_rx_work);
+}
+
+/* Notify sockets that we cannot guaranty reliability anymore */
+static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err)
+{
+	struct l2cap_chan *chan;
+
+	BT_DBG("conn %p", conn);
+
+	mutex_lock(&conn->chan_lock);
+
+	list_for_each_entry(chan, &conn->chan_l, list) {
+		if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags))
+			l2cap_chan_set_err(chan, err);
+	}
+
+	mutex_unlock(&conn->chan_lock);
+}
+
+static void l2cap_info_timeout(struct work_struct *work)
+{
+	struct l2cap_conn *conn = container_of(work, struct l2cap_conn,
+					       info_timer.work);
+
+	conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
+	conn->info_ident = 0;
+
+	l2cap_conn_start(conn);
+}
+
+/*
+ * l2cap_user
+ * External modules can register l2cap_user objects on l2cap_conn. The ->probe
+ * callback is called during registration. The ->remove callback is called
+ * during unregistration.
+ * An l2cap_user object can either be explicitly unregistered or when the
+ * underlying l2cap_conn object is deleted. This guarantees that l2cap->hcon,
+ * l2cap->hchan, .. are valid as long as the remove callback hasn't been called.
+ * External modules must own a reference to the l2cap_conn object if they intend
+ * to call l2cap_unregister_user(). The l2cap_conn object might get destroyed at
+ * any time if they don't.
+ */
+
+int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user)
+{
+	struct hci_dev *hdev = conn->hcon->hdev;
+	int ret;
+
+	/* We need to check whether l2cap_conn is registered. If it is not, we
+	 * must not register the l2cap_user. l2cap_conn_del() is unregisters
+	 * l2cap_conn objects, but doesn't provide its own locking. Instead, it
+	 * relies on the parent hci_conn object to be locked. This itself relies
+	 * on the hci_dev object to be locked. So we must lock the hci device
+	 * here, too. */
+
+	hci_dev_lock(hdev);
+
+	if (!list_empty(&user->list)) {
+		ret = -EINVAL;
+		goto out_unlock;
+	}
+
+	/* conn->hchan is NULL after l2cap_conn_del() was called */
+	if (!conn->hchan) {
+		ret = -ENODEV;
+		goto out_unlock;
+	}
+
+	ret = user->probe(conn, user);
+	if (ret)
+		goto out_unlock;
+
+	list_add(&user->list, &conn->users);
+	ret = 0;
+
+out_unlock:
+	hci_dev_unlock(hdev);
+	return ret;
+}
+EXPORT_SYMBOL(l2cap_register_user);
+
+void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user)
+{
+	struct hci_dev *hdev = conn->hcon->hdev;
+
+	hci_dev_lock(hdev);
+
+	if (list_empty(&user->list))
+		goto out_unlock;
+
+	list_del_init(&user->list);
+	user->remove(conn, user);
+
+out_unlock:
+	hci_dev_unlock(hdev);
+}
+EXPORT_SYMBOL(l2cap_unregister_user);
+
+static void l2cap_unregister_all_users(struct l2cap_conn *conn)
+{
+	struct l2cap_user *user;
+
+	while (!list_empty(&conn->users)) {
+		user = list_first_entry(&conn->users, struct l2cap_user, list);
+		list_del_init(&user->list);
+		user->remove(conn, user);
+	}
+}
+
+static void l2cap_conn_del(struct hci_conn *hcon, int err)
+{
+	struct l2cap_conn *conn = hcon->l2cap_data;
+	struct l2cap_chan *chan, *l;
+
+	if (!conn)
+		return;
+
+	BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
+
+	kfree_skb(conn->rx_skb);
+
+	skb_queue_purge(&conn->pending_rx);
+
+	/* We can not call flush_work(&conn->pending_rx_work) here since we
+	 * might block if we are running on a worker from the same workqueue
+	 * pending_rx_work is waiting on.
+	 */
+	if (work_pending(&conn->pending_rx_work))
+		cancel_work_sync(&conn->pending_rx_work);
+
+	if (work_pending(&conn->id_addr_update_work))
+		cancel_work_sync(&conn->id_addr_update_work);
+
+	l2cap_unregister_all_users(conn);
+
+	/* Force the connection to be immediately dropped */
+	hcon->disc_timeout = 0;
+
+	mutex_lock(&conn->chan_lock);
+
+	/* Kill channels */
+	list_for_each_entry_safe(chan, l, &conn->chan_l, list) {
+		l2cap_chan_hold(chan);
+		l2cap_chan_lock(chan);
+
+		l2cap_chan_del(chan, err);
+
+		chan->ops->close(chan);
+
+		l2cap_chan_unlock(chan);
+		l2cap_chan_put(chan);
+	}
+
+	mutex_unlock(&conn->chan_lock);
+
+	hci_chan_del(conn->hchan);
+
+	if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT)
+		cancel_delayed_work_sync(&conn->info_timer);
+
+	hcon->l2cap_data = NULL;
+	conn->hchan = NULL;
+	l2cap_conn_put(conn);
+}
+
+static void l2cap_conn_free(struct kref *ref)
+{
+	struct l2cap_conn *conn = container_of(ref, struct l2cap_conn, ref);
+
+	hci_conn_put(conn->hcon);
+	kfree(conn);
+}
+
+struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn)
+{
+	kref_get(&conn->ref);
+	return conn;
+}
+EXPORT_SYMBOL(l2cap_conn_get);
+
+void l2cap_conn_put(struct l2cap_conn *conn)
+{
+	kref_put(&conn->ref, l2cap_conn_free);
+}
+EXPORT_SYMBOL(l2cap_conn_put);
+
+/* ---- Socket interface ---- */
+
+/* Find socket with psm and source / destination bdaddr.
+ * Returns closest match.
+ */
+static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm,
+						   bdaddr_t *src,
+						   bdaddr_t *dst,
+						   u8 link_type)
+{
+	struct l2cap_chan *c, *tmp, *c1 = NULL;
+
+	read_lock(&chan_list_lock);
+
+	list_for_each_entry_safe(c, tmp, &chan_list, global_l) {
+		if (state && c->state != state)
+			continue;
+
+		if (link_type == ACL_LINK && c->src_type != BDADDR_BREDR)
+			continue;
+
+		if (link_type == LE_LINK && c->src_type == BDADDR_BREDR)
+			continue;
+
+		if (c->chan_type != L2CAP_CHAN_FIXED && c->psm == psm) {
+			int src_match, dst_match;
+			int src_any, dst_any;
+
+			/* Exact match. */
+			src_match = !bacmp(&c->src, src);
+			dst_match = !bacmp(&c->dst, dst);
+			if (src_match && dst_match) {
+				if (!l2cap_chan_hold_unless_zero(c))
+					continue;
+
+				read_unlock(&chan_list_lock);
+				return c;
+			}
+
+			/* Closest match */
+			src_any = !bacmp(&c->src, BDADDR_ANY);
+			dst_any = !bacmp(&c->dst, BDADDR_ANY);
+			if ((src_match && dst_any) || (src_any && dst_match) ||
+			    (src_any && dst_any))
+				c1 = c;
+		}
+	}
+
+	if (c1)
+		c1 = l2cap_chan_hold_unless_zero(c1);
+
+	read_unlock(&chan_list_lock);
+
+	return c1;
+}
+
+static void l2cap_monitor_timeout(struct work_struct *work)
+{
+	struct l2cap_chan *chan = container_of(work, struct l2cap_chan,
+					       monitor_timer.work);
+
+	BT_DBG("chan %p", chan);
+
+	l2cap_chan_lock(chan);
+
+	if (!chan->conn) {
+		l2cap_chan_unlock(chan);
+		l2cap_chan_put(chan);
+		return;
+	}
+
+	l2cap_tx(chan, NULL, NULL, L2CAP_EV_MONITOR_TO);
+
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+}
+
+static void l2cap_retrans_timeout(struct work_struct *work)
+{
+	struct l2cap_chan *chan = container_of(work, struct l2cap_chan,
+					       retrans_timer.work);
+
+	BT_DBG("chan %p", chan);
+
+	l2cap_chan_lock(chan);
+
+	if (!chan->conn) {
+		l2cap_chan_unlock(chan);
+		l2cap_chan_put(chan);
+		return;
+	}
+
+	l2cap_tx(chan, NULL, NULL, L2CAP_EV_RETRANS_TO);
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+}
+
+static void l2cap_streaming_send(struct l2cap_chan *chan,
+				 struct sk_buff_head *skbs)
+{
+	struct sk_buff *skb;
+	struct l2cap_ctrl *control;
+
+	BT_DBG("chan %p, skbs %p", chan, skbs);
+
+	if (__chan_is_moving(chan))
+		return;
+
+	skb_queue_splice_tail_init(skbs, &chan->tx_q);
+
+	while (!skb_queue_empty(&chan->tx_q)) {
+
+		skb = skb_dequeue(&chan->tx_q);
+
+		bt_cb(skb)->l2cap.retries = 1;
+		control = &bt_cb(skb)->l2cap;
+
+		control->reqseq = 0;
+		control->txseq = chan->next_tx_seq;
+
+		__pack_control(chan, control, skb);
+
+		if (chan->fcs == L2CAP_FCS_CRC16) {
+			u16 fcs = crc16(0, (u8 *) skb->data, skb->len);
+			put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE));
+		}
+
+		l2cap_do_send(chan, skb);
+
+		BT_DBG("Sent txseq %u", control->txseq);
+
+		chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq);
+		chan->frames_sent++;
+	}
+}
+
+static int l2cap_ertm_send(struct l2cap_chan *chan)
+{
+	struct sk_buff *skb, *tx_skb;
+	struct l2cap_ctrl *control;
+	int sent = 0;
+
+	BT_DBG("chan %p", chan);
+
+	if (chan->state != BT_CONNECTED)
+		return -ENOTCONN;
+
+	if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state))
+		return 0;
+
+	if (__chan_is_moving(chan))
+		return 0;
+
+	while (chan->tx_send_head &&
+	       chan->unacked_frames < chan->remote_tx_win &&
+	       chan->tx_state == L2CAP_TX_STATE_XMIT) {
+
+		skb = chan->tx_send_head;
+
+		bt_cb(skb)->l2cap.retries = 1;
+		control = &bt_cb(skb)->l2cap;
+
+		if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state))
+			control->final = 1;
+
+		control->reqseq = chan->buffer_seq;
+		chan->last_acked_seq = chan->buffer_seq;
+		control->txseq = chan->next_tx_seq;
+
+		__pack_control(chan, control, skb);
+
+		if (chan->fcs == L2CAP_FCS_CRC16) {
+			u16 fcs = crc16(0, (u8 *) skb->data, skb->len);
+			put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE));
+		}
+
+		/* Clone after data has been modified. Data is assumed to be
+		   read-only (for locking purposes) on cloned sk_buffs.
+		 */
+		tx_skb = skb_clone(skb, GFP_KERNEL);
+
+		if (!tx_skb)
+			break;
+
+		__set_retrans_timer(chan);
+
+		chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq);
+		chan->unacked_frames++;
+		chan->frames_sent++;
+		sent++;
+
+		if (skb_queue_is_last(&chan->tx_q, skb))
+			chan->tx_send_head = NULL;
+		else
+			chan->tx_send_head = skb_queue_next(&chan->tx_q, skb);
+
+		l2cap_do_send(chan, tx_skb);
+		BT_DBG("Sent txseq %u", control->txseq);
+	}
+
+	BT_DBG("Sent %d, %u unacked, %u in ERTM queue", sent,
+	       chan->unacked_frames, skb_queue_len(&chan->tx_q));
+
+	return sent;
+}
+
+static void l2cap_ertm_resend(struct l2cap_chan *chan)
+{
+	struct l2cap_ctrl control;
+	struct sk_buff *skb;
+	struct sk_buff *tx_skb;
+	u16 seq;
+
+	BT_DBG("chan %p", chan);
+
+	if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state))
+		return;
+
+	if (__chan_is_moving(chan))
+		return;
+
+	while (chan->retrans_list.head != L2CAP_SEQ_LIST_CLEAR) {
+		seq = l2cap_seq_list_pop(&chan->retrans_list);
+
+		skb = l2cap_ertm_seq_in_queue(&chan->tx_q, seq);
+		if (!skb) {
+			BT_DBG("Error: Can't retransmit seq %d, frame missing",
+			       seq);
+			continue;
+		}
+
+		bt_cb(skb)->l2cap.retries++;
+		control = bt_cb(skb)->l2cap;
+
+		if (chan->max_tx != 0 &&
+		    bt_cb(skb)->l2cap.retries > chan->max_tx) {
+			BT_DBG("Retry limit exceeded (%d)", chan->max_tx);
+			l2cap_send_disconn_req(chan, ECONNRESET);
+			l2cap_seq_list_clear(&chan->retrans_list);
+			break;
+		}
+
+		control.reqseq = chan->buffer_seq;
+		if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state))
+			control.final = 1;
+		else
+			control.final = 0;
+
+		if (skb_cloned(skb)) {
+			/* Cloned sk_buffs are read-only, so we need a
+			 * writeable copy
+			 */
+			tx_skb = skb_copy(skb, GFP_KERNEL);
+		} else {
+			tx_skb = skb_clone(skb, GFP_KERNEL);
+		}
+
+		if (!tx_skb) {
+			l2cap_seq_list_clear(&chan->retrans_list);
+			break;
+		}
+
+		/* Update skb contents */
+		if (test_bit(FLAG_EXT_CTRL, &chan->flags)) {
+			put_unaligned_le32(__pack_extended_control(&control),
+					   tx_skb->data + L2CAP_HDR_SIZE);
+		} else {
+			put_unaligned_le16(__pack_enhanced_control(&control),
+					   tx_skb->data + L2CAP_HDR_SIZE);
+		}
+
+		/* Update FCS */
+		if (chan->fcs == L2CAP_FCS_CRC16) {
+			u16 fcs = crc16(0, (u8 *) tx_skb->data,
+					tx_skb->len - L2CAP_FCS_SIZE);
+			put_unaligned_le16(fcs, skb_tail_pointer(tx_skb) -
+						L2CAP_FCS_SIZE);
+		}
+
+		l2cap_do_send(chan, tx_skb);
+
+		BT_DBG("Resent txseq %d", control.txseq);
+
+		chan->last_acked_seq = chan->buffer_seq;
+	}
+}
+
+static void l2cap_retransmit(struct l2cap_chan *chan,
+			     struct l2cap_ctrl *control)
+{
+	BT_DBG("chan %p, control %p", chan, control);
+
+	l2cap_seq_list_append(&chan->retrans_list, control->reqseq);
+	l2cap_ertm_resend(chan);
+}
+
+static void l2cap_retransmit_all(struct l2cap_chan *chan,
+				 struct l2cap_ctrl *control)
+{
+	struct sk_buff *skb;
+
+	BT_DBG("chan %p, control %p", chan, control);
+
+	if (control->poll)
+		set_bit(CONN_SEND_FBIT, &chan->conn_state);
+
+	l2cap_seq_list_clear(&chan->retrans_list);
+
+	if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state))
+		return;
+
+	if (chan->unacked_frames) {
+		skb_queue_walk(&chan->tx_q, skb) {
+			if (bt_cb(skb)->l2cap.txseq == control->reqseq ||
+			    skb == chan->tx_send_head)
+				break;
+		}
+
+		skb_queue_walk_from(&chan->tx_q, skb) {
+			if (skb == chan->tx_send_head)
+				break;
+
+			l2cap_seq_list_append(&chan->retrans_list,
+					      bt_cb(skb)->l2cap.txseq);
+		}
+
+		l2cap_ertm_resend(chan);
+	}
+}
+
+static void l2cap_send_ack(struct l2cap_chan *chan)
+{
+	struct l2cap_ctrl control;
+	u16 frames_to_ack = __seq_offset(chan, chan->buffer_seq,
+					 chan->last_acked_seq);
+	int threshold;
+
+	BT_DBG("chan %p last_acked_seq %d buffer_seq %d",
+	       chan, chan->last_acked_seq, chan->buffer_seq);
+
+	memset(&control, 0, sizeof(control));
+	control.sframe = 1;
+
+	if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state) &&
+	    chan->rx_state == L2CAP_RX_STATE_RECV) {
+		__clear_ack_timer(chan);
+		control.super = L2CAP_SUPER_RNR;
+		control.reqseq = chan->buffer_seq;
+		l2cap_send_sframe(chan, &control);
+	} else {
+		if (!test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) {
+			l2cap_ertm_send(chan);
+			/* If any i-frames were sent, they included an ack */
+			if (chan->buffer_seq == chan->last_acked_seq)
+				frames_to_ack = 0;
+		}
+
+		/* Ack now if the window is 3/4ths full.
+		 * Calculate without mul or div
+		 */
+		threshold = chan->ack_win;
+		threshold += threshold << 1;
+		threshold >>= 2;
+
+		BT_DBG("frames_to_ack %u, threshold %d", frames_to_ack,
+		       threshold);
+
+		if (frames_to_ack >= threshold) {
+			__clear_ack_timer(chan);
+			control.super = L2CAP_SUPER_RR;
+			control.reqseq = chan->buffer_seq;
+			l2cap_send_sframe(chan, &control);
+			frames_to_ack = 0;
+		}
+
+		if (frames_to_ack)
+			__set_ack_timer(chan);
+	}
+}
+
+static inline int l2cap_skbuff_fromiovec(struct l2cap_chan *chan,
+					 struct msghdr *msg, int len,
+					 int count, struct sk_buff *skb)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct sk_buff **frag;
+	int sent = 0;
+
+	if (!copy_from_iter_full(skb_put(skb, count), count, &msg->msg_iter))
+		return -EFAULT;
+
+	sent += count;
+	len  -= count;
+
+	/* Continuation fragments (no L2CAP header) */
+	frag = &skb_shinfo(skb)->frag_list;
+	while (len) {
+		struct sk_buff *tmp;
+
+		count = min_t(unsigned int, conn->mtu, len);
+
+		tmp = chan->ops->alloc_skb(chan, 0, count,
+					   msg->msg_flags & MSG_DONTWAIT);
+		if (IS_ERR(tmp))
+			return PTR_ERR(tmp);
+
+		*frag = tmp;
+
+		if (!copy_from_iter_full(skb_put(*frag, count), count,
+				   &msg->msg_iter))
+			return -EFAULT;
+
+		sent += count;
+		len  -= count;
+
+		skb->len += (*frag)->len;
+		skb->data_len += (*frag)->len;
+
+		frag = &(*frag)->next;
+	}
+
+	return sent;
+}
+
+static struct sk_buff *l2cap_create_connless_pdu(struct l2cap_chan *chan,
+						 struct msghdr *msg, size_t len)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct sk_buff *skb;
+	int err, count, hlen = L2CAP_HDR_SIZE + L2CAP_PSMLEN_SIZE;
+	struct l2cap_hdr *lh;
+
+	BT_DBG("chan %p psm 0x%2.2x len %zu", chan,
+	       __le16_to_cpu(chan->psm), len);
+
+	count = min_t(unsigned int, (conn->mtu - hlen), len);
+
+	skb = chan->ops->alloc_skb(chan, hlen, count,
+				   msg->msg_flags & MSG_DONTWAIT);
+	if (IS_ERR(skb))
+		return skb;
+
+	/* Create L2CAP header */
+	lh = skb_put(skb, L2CAP_HDR_SIZE);
+	lh->cid = cpu_to_le16(chan->dcid);
+	lh->len = cpu_to_le16(len + L2CAP_PSMLEN_SIZE);
+	put_unaligned(chan->psm, (__le16 *) skb_put(skb, L2CAP_PSMLEN_SIZE));
+
+	err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb);
+	if (unlikely(err < 0)) {
+		kfree_skb(skb);
+		return ERR_PTR(err);
+	}
+	return skb;
+}
+
+static struct sk_buff *l2cap_create_basic_pdu(struct l2cap_chan *chan,
+					      struct msghdr *msg, size_t len)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct sk_buff *skb;
+	int err, count;
+	struct l2cap_hdr *lh;
+
+	BT_DBG("chan %p len %zu", chan, len);
+
+	count = min_t(unsigned int, (conn->mtu - L2CAP_HDR_SIZE), len);
+
+	skb = chan->ops->alloc_skb(chan, L2CAP_HDR_SIZE, count,
+				   msg->msg_flags & MSG_DONTWAIT);
+	if (IS_ERR(skb))
+		return skb;
+
+	/* Create L2CAP header */
+	lh = skb_put(skb, L2CAP_HDR_SIZE);
+	lh->cid = cpu_to_le16(chan->dcid);
+	lh->len = cpu_to_le16(len);
+
+	err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb);
+	if (unlikely(err < 0)) {
+		kfree_skb(skb);
+		return ERR_PTR(err);
+	}
+	return skb;
+}
+
+static struct sk_buff *l2cap_create_iframe_pdu(struct l2cap_chan *chan,
+					       struct msghdr *msg, size_t len,
+					       u16 sdulen)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct sk_buff *skb;
+	int err, count, hlen;
+	struct l2cap_hdr *lh;
+
+	BT_DBG("chan %p len %zu", chan, len);
+
+	if (!conn)
+		return ERR_PTR(-ENOTCONN);
+
+	hlen = __ertm_hdr_size(chan);
+
+	if (sdulen)
+		hlen += L2CAP_SDULEN_SIZE;
+
+	if (chan->fcs == L2CAP_FCS_CRC16)
+		hlen += L2CAP_FCS_SIZE;
+
+	count = min_t(unsigned int, (conn->mtu - hlen), len);
+
+	skb = chan->ops->alloc_skb(chan, hlen, count,
+				   msg->msg_flags & MSG_DONTWAIT);
+	if (IS_ERR(skb))
+		return skb;
+
+	/* Create L2CAP header */
+	lh = skb_put(skb, L2CAP_HDR_SIZE);
+	lh->cid = cpu_to_le16(chan->dcid);
+	lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE));
+
+	/* Control header is populated later */
+	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
+		put_unaligned_le32(0, skb_put(skb, L2CAP_EXT_CTRL_SIZE));
+	else
+		put_unaligned_le16(0, skb_put(skb, L2CAP_ENH_CTRL_SIZE));
+
+	if (sdulen)
+		put_unaligned_le16(sdulen, skb_put(skb, L2CAP_SDULEN_SIZE));
+
+	err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb);
+	if (unlikely(err < 0)) {
+		kfree_skb(skb);
+		return ERR_PTR(err);
+	}
+
+	bt_cb(skb)->l2cap.fcs = chan->fcs;
+	bt_cb(skb)->l2cap.retries = 0;
+	return skb;
+}
+
+static int l2cap_segment_sdu(struct l2cap_chan *chan,
+			     struct sk_buff_head *seg_queue,
+			     struct msghdr *msg, size_t len)
+{
+	struct sk_buff *skb;
+	u16 sdu_len;
+	size_t pdu_len;
+	u8 sar;
+
+	BT_DBG("chan %p, msg %p, len %zu", chan, msg, len);
+
+	/* It is critical that ERTM PDUs fit in a single HCI fragment,
+	 * so fragmented skbs are not used.  The HCI layer's handling
+	 * of fragmented skbs is not compatible with ERTM's queueing.
+	 */
+
+	/* PDU size is derived from the HCI MTU */
+	pdu_len = chan->conn->mtu;
+
+	/* Constrain PDU size for BR/EDR connections */
+	if (!chan->hs_hcon)
+		pdu_len = min_t(size_t, pdu_len, L2CAP_BREDR_MAX_PAYLOAD);
+
+	/* Adjust for largest possible L2CAP overhead. */
+	if (chan->fcs)
+		pdu_len -= L2CAP_FCS_SIZE;
+
+	pdu_len -= __ertm_hdr_size(chan);
+
+	/* Remote device may have requested smaller PDUs */
+	pdu_len = min_t(size_t, pdu_len, chan->remote_mps);
+
+	if (len <= pdu_len) {
+		sar = L2CAP_SAR_UNSEGMENTED;
+		sdu_len = 0;
+		pdu_len = len;
+	} else {
+		sar = L2CAP_SAR_START;
+		sdu_len = len;
+	}
+
+	while (len > 0) {
+		skb = l2cap_create_iframe_pdu(chan, msg, pdu_len, sdu_len);
+
+		if (IS_ERR(skb)) {
+			__skb_queue_purge(seg_queue);
+			return PTR_ERR(skb);
+		}
+
+		bt_cb(skb)->l2cap.sar = sar;
+		__skb_queue_tail(seg_queue, skb);
+
+		len -= pdu_len;
+		if (sdu_len)
+			sdu_len = 0;
+
+		if (len <= pdu_len) {
+			sar = L2CAP_SAR_END;
+			pdu_len = len;
+		} else {
+			sar = L2CAP_SAR_CONTINUE;
+		}
+	}
+
+	return 0;
+}
+
+static struct sk_buff *l2cap_create_le_flowctl_pdu(struct l2cap_chan *chan,
+						   struct msghdr *msg,
+						   size_t len, u16 sdulen)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct sk_buff *skb;
+	int err, count, hlen;
+	struct l2cap_hdr *lh;
+
+	BT_DBG("chan %p len %zu", chan, len);
+
+	if (!conn)
+		return ERR_PTR(-ENOTCONN);
+
+	hlen = L2CAP_HDR_SIZE;
+
+	if (sdulen)
+		hlen += L2CAP_SDULEN_SIZE;
+
+	count = min_t(unsigned int, (conn->mtu - hlen), len);
+
+	skb = chan->ops->alloc_skb(chan, hlen, count,
+				   msg->msg_flags & MSG_DONTWAIT);
+	if (IS_ERR(skb))
+		return skb;
+
+	/* Create L2CAP header */
+	lh = skb_put(skb, L2CAP_HDR_SIZE);
+	lh->cid = cpu_to_le16(chan->dcid);
+	lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE));
+
+	if (sdulen)
+		put_unaligned_le16(sdulen, skb_put(skb, L2CAP_SDULEN_SIZE));
+
+	err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb);
+	if (unlikely(err < 0)) {
+		kfree_skb(skb);
+		return ERR_PTR(err);
+	}
+
+	return skb;
+}
+
+static int l2cap_segment_le_sdu(struct l2cap_chan *chan,
+				struct sk_buff_head *seg_queue,
+				struct msghdr *msg, size_t len)
+{
+	struct sk_buff *skb;
+	size_t pdu_len;
+	u16 sdu_len;
+
+	BT_DBG("chan %p, msg %p, len %zu", chan, msg, len);
+
+	sdu_len = len;
+	pdu_len = chan->remote_mps - L2CAP_SDULEN_SIZE;
+
+	while (len > 0) {
+		if (len <= pdu_len)
+			pdu_len = len;
+
+		skb = l2cap_create_le_flowctl_pdu(chan, msg, pdu_len, sdu_len);
+		if (IS_ERR(skb)) {
+			__skb_queue_purge(seg_queue);
+			return PTR_ERR(skb);
+		}
+
+		__skb_queue_tail(seg_queue, skb);
+
+		len -= pdu_len;
+
+		if (sdu_len) {
+			sdu_len = 0;
+			pdu_len += L2CAP_SDULEN_SIZE;
+		}
+	}
+
+	return 0;
+}
+
+static void l2cap_le_flowctl_send(struct l2cap_chan *chan)
+{
+	int sent = 0;
+
+	BT_DBG("chan %p", chan);
+
+	while (chan->tx_credits && !skb_queue_empty(&chan->tx_q)) {
+		l2cap_do_send(chan, skb_dequeue(&chan->tx_q));
+		chan->tx_credits--;
+		sent++;
+	}
+
+	BT_DBG("Sent %d credits %u queued %u", sent, chan->tx_credits,
+	       skb_queue_len(&chan->tx_q));
+}
+
+int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len)
+{
+	struct sk_buff *skb;
+	int err;
+	struct sk_buff_head seg_queue;
+
+	if (!chan->conn)
+		return -ENOTCONN;
+
+	/* Connectionless channel */
+	if (chan->chan_type == L2CAP_CHAN_CONN_LESS) {
+		skb = l2cap_create_connless_pdu(chan, msg, len);
+		if (IS_ERR(skb))
+			return PTR_ERR(skb);
+
+		l2cap_do_send(chan, skb);
+		return len;
+	}
+
+	switch (chan->mode) {
+	case L2CAP_MODE_LE_FLOWCTL:
+	case L2CAP_MODE_EXT_FLOWCTL:
+		/* Check outgoing MTU */
+		if (len > chan->omtu)
+			return -EMSGSIZE;
+
+		__skb_queue_head_init(&seg_queue);
+
+		err = l2cap_segment_le_sdu(chan, &seg_queue, msg, len);
+
+		if (chan->state != BT_CONNECTED) {
+			__skb_queue_purge(&seg_queue);
+			err = -ENOTCONN;
+		}
+
+		if (err)
+			return err;
+
+		skb_queue_splice_tail_init(&seg_queue, &chan->tx_q);
+
+		l2cap_le_flowctl_send(chan);
+
+		if (!chan->tx_credits)
+			chan->ops->suspend(chan);
+
+		err = len;
+
+		break;
+
+	case L2CAP_MODE_BASIC:
+		/* Check outgoing MTU */
+		if (len > chan->omtu)
+			return -EMSGSIZE;
+
+		/* Create a basic PDU */
+		skb = l2cap_create_basic_pdu(chan, msg, len);
+		if (IS_ERR(skb))
+			return PTR_ERR(skb);
+
+		l2cap_do_send(chan, skb);
+		err = len;
+		break;
+
+	case L2CAP_MODE_ERTM:
+	case L2CAP_MODE_STREAMING:
+		/* Check outgoing MTU */
+		if (len > chan->omtu) {
+			err = -EMSGSIZE;
+			break;
+		}
+
+		__skb_queue_head_init(&seg_queue);
+
+		/* Do segmentation before calling in to the state machine,
+		 * since it's possible to block while waiting for memory
+		 * allocation.
+		 */
+		err = l2cap_segment_sdu(chan, &seg_queue, msg, len);
+
+		if (err)
+			break;
+
+		if (chan->mode == L2CAP_MODE_ERTM)
+			l2cap_tx(chan, NULL, &seg_queue, L2CAP_EV_DATA_REQUEST);
+		else
+			l2cap_streaming_send(chan, &seg_queue);
+
+		err = len;
+
+		/* If the skbs were not queued for sending, they'll still be in
+		 * seg_queue and need to be purged.
+		 */
+		__skb_queue_purge(&seg_queue);
+		break;
+
+	default:
+		BT_DBG("bad state %1.1x", chan->mode);
+		err = -EBADFD;
+	}
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(l2cap_chan_send);
+
+static void l2cap_send_srej(struct l2cap_chan *chan, u16 txseq)
+{
+	struct l2cap_ctrl control;
+	u16 seq;
+
+	BT_DBG("chan %p, txseq %u", chan, txseq);
+
+	memset(&control, 0, sizeof(control));
+	control.sframe = 1;
+	control.super = L2CAP_SUPER_SREJ;
+
+	for (seq = chan->expected_tx_seq; seq != txseq;
+	     seq = __next_seq(chan, seq)) {
+		if (!l2cap_ertm_seq_in_queue(&chan->srej_q, seq)) {
+			control.reqseq = seq;
+			l2cap_send_sframe(chan, &control);
+			l2cap_seq_list_append(&chan->srej_list, seq);
+		}
+	}
+
+	chan->expected_tx_seq = __next_seq(chan, txseq);
+}
+
+static void l2cap_send_srej_tail(struct l2cap_chan *chan)
+{
+	struct l2cap_ctrl control;
+
+	BT_DBG("chan %p", chan);
+
+	if (chan->srej_list.tail == L2CAP_SEQ_LIST_CLEAR)
+		return;
+
+	memset(&control, 0, sizeof(control));
+	control.sframe = 1;
+	control.super = L2CAP_SUPER_SREJ;
+	control.reqseq = chan->srej_list.tail;
+	l2cap_send_sframe(chan, &control);
+}
+
+static void l2cap_send_srej_list(struct l2cap_chan *chan, u16 txseq)
+{
+	struct l2cap_ctrl control;
+	u16 initial_head;
+	u16 seq;
+
+	BT_DBG("chan %p, txseq %u", chan, txseq);
+
+	memset(&control, 0, sizeof(control));
+	control.sframe = 1;
+	control.super = L2CAP_SUPER_SREJ;
+
+	/* Capture initial list head to allow only one pass through the list. */
+	initial_head = chan->srej_list.head;
+
+	do {
+		seq = l2cap_seq_list_pop(&chan->srej_list);
+		if (seq == txseq || seq == L2CAP_SEQ_LIST_CLEAR)
+			break;
+
+		control.reqseq = seq;
+		l2cap_send_sframe(chan, &control);
+		l2cap_seq_list_append(&chan->srej_list, seq);
+	} while (chan->srej_list.head != initial_head);
+}
+
+static void l2cap_process_reqseq(struct l2cap_chan *chan, u16 reqseq)
+{
+	struct sk_buff *acked_skb;
+	u16 ackseq;
+
+	BT_DBG("chan %p, reqseq %u", chan, reqseq);
+
+	if (chan->unacked_frames == 0 || reqseq == chan->expected_ack_seq)
+		return;
+
+	BT_DBG("expected_ack_seq %u, unacked_frames %u",
+	       chan->expected_ack_seq, chan->unacked_frames);
+
+	for (ackseq = chan->expected_ack_seq; ackseq != reqseq;
+	     ackseq = __next_seq(chan, ackseq)) {
+
+		acked_skb = l2cap_ertm_seq_in_queue(&chan->tx_q, ackseq);
+		if (acked_skb) {
+			skb_unlink(acked_skb, &chan->tx_q);
+			kfree_skb(acked_skb);
+			chan->unacked_frames--;
+		}
+	}
+
+	chan->expected_ack_seq = reqseq;
+
+	if (chan->unacked_frames == 0)
+		__clear_retrans_timer(chan);
+
+	BT_DBG("unacked_frames %u", chan->unacked_frames);
+}
+
+static void l2cap_abort_rx_srej_sent(struct l2cap_chan *chan)
+{
+	BT_DBG("chan %p", chan);
+
+	chan->expected_tx_seq = chan->buffer_seq;
+	l2cap_seq_list_clear(&chan->srej_list);
+	skb_queue_purge(&chan->srej_q);
+	chan->rx_state = L2CAP_RX_STATE_RECV;
+}
+
+static void l2cap_tx_state_xmit(struct l2cap_chan *chan,
+				struct l2cap_ctrl *control,
+				struct sk_buff_head *skbs, u8 event)
+{
+	BT_DBG("chan %p, control %p, skbs %p, event %d", chan, control, skbs,
+	       event);
+
+	switch (event) {
+	case L2CAP_EV_DATA_REQUEST:
+		if (chan->tx_send_head == NULL)
+			chan->tx_send_head = skb_peek(skbs);
+
+		skb_queue_splice_tail_init(skbs, &chan->tx_q);
+		l2cap_ertm_send(chan);
+		break;
+	case L2CAP_EV_LOCAL_BUSY_DETECTED:
+		BT_DBG("Enter LOCAL_BUSY");
+		set_bit(CONN_LOCAL_BUSY, &chan->conn_state);
+
+		if (chan->rx_state == L2CAP_RX_STATE_SREJ_SENT) {
+			/* The SREJ_SENT state must be aborted if we are to
+			 * enter the LOCAL_BUSY state.
+			 */
+			l2cap_abort_rx_srej_sent(chan);
+		}
+
+		l2cap_send_ack(chan);
+
+		break;
+	case L2CAP_EV_LOCAL_BUSY_CLEAR:
+		BT_DBG("Exit LOCAL_BUSY");
+		clear_bit(CONN_LOCAL_BUSY, &chan->conn_state);
+
+		if (test_bit(CONN_RNR_SENT, &chan->conn_state)) {
+			struct l2cap_ctrl local_control;
+
+			memset(&local_control, 0, sizeof(local_control));
+			local_control.sframe = 1;
+			local_control.super = L2CAP_SUPER_RR;
+			local_control.poll = 1;
+			local_control.reqseq = chan->buffer_seq;
+			l2cap_send_sframe(chan, &local_control);
+
+			chan->retry_count = 1;
+			__set_monitor_timer(chan);
+			chan->tx_state = L2CAP_TX_STATE_WAIT_F;
+		}
+		break;
+	case L2CAP_EV_RECV_REQSEQ_AND_FBIT:
+		l2cap_process_reqseq(chan, control->reqseq);
+		break;
+	case L2CAP_EV_EXPLICIT_POLL:
+		l2cap_send_rr_or_rnr(chan, 1);
+		chan->retry_count = 1;
+		__set_monitor_timer(chan);
+		__clear_ack_timer(chan);
+		chan->tx_state = L2CAP_TX_STATE_WAIT_F;
+		break;
+	case L2CAP_EV_RETRANS_TO:
+		l2cap_send_rr_or_rnr(chan, 1);
+		chan->retry_count = 1;
+		__set_monitor_timer(chan);
+		chan->tx_state = L2CAP_TX_STATE_WAIT_F;
+		break;
+	case L2CAP_EV_RECV_FBIT:
+		/* Nothing to process */
+		break;
+	default:
+		break;
+	}
+}
+
+static void l2cap_tx_state_wait_f(struct l2cap_chan *chan,
+				  struct l2cap_ctrl *control,
+				  struct sk_buff_head *skbs, u8 event)
+{
+	BT_DBG("chan %p, control %p, skbs %p, event %d", chan, control, skbs,
+	       event);
+
+	switch (event) {
+	case L2CAP_EV_DATA_REQUEST:
+		if (chan->tx_send_head == NULL)
+			chan->tx_send_head = skb_peek(skbs);
+		/* Queue data, but don't send. */
+		skb_queue_splice_tail_init(skbs, &chan->tx_q);
+		break;
+	case L2CAP_EV_LOCAL_BUSY_DETECTED:
+		BT_DBG("Enter LOCAL_BUSY");
+		set_bit(CONN_LOCAL_BUSY, &chan->conn_state);
+
+		if (chan->rx_state == L2CAP_RX_STATE_SREJ_SENT) {
+			/* The SREJ_SENT state must be aborted if we are to
+			 * enter the LOCAL_BUSY state.
+			 */
+			l2cap_abort_rx_srej_sent(chan);
+		}
+
+		l2cap_send_ack(chan);
+
+		break;
+	case L2CAP_EV_LOCAL_BUSY_CLEAR:
+		BT_DBG("Exit LOCAL_BUSY");
+		clear_bit(CONN_LOCAL_BUSY, &chan->conn_state);
+
+		if (test_bit(CONN_RNR_SENT, &chan->conn_state)) {
+			struct l2cap_ctrl local_control;
+			memset(&local_control, 0, sizeof(local_control));
+			local_control.sframe = 1;
+			local_control.super = L2CAP_SUPER_RR;
+			local_control.poll = 1;
+			local_control.reqseq = chan->buffer_seq;
+			l2cap_send_sframe(chan, &local_control);
+
+			chan->retry_count = 1;
+			__set_monitor_timer(chan);
+			chan->tx_state = L2CAP_TX_STATE_WAIT_F;
+		}
+		break;
+	case L2CAP_EV_RECV_REQSEQ_AND_FBIT:
+		l2cap_process_reqseq(chan, control->reqseq);
+		fallthrough;
+
+	case L2CAP_EV_RECV_FBIT:
+		if (control && control->final) {
+			__clear_monitor_timer(chan);
+			if (chan->unacked_frames > 0)
+				__set_retrans_timer(chan);
+			chan->retry_count = 0;
+			chan->tx_state = L2CAP_TX_STATE_XMIT;
+			BT_DBG("recv fbit tx_state 0x2.2%x", chan->tx_state);
+		}
+		break;
+	case L2CAP_EV_EXPLICIT_POLL:
+		/* Ignore */
+		break;
+	case L2CAP_EV_MONITOR_TO:
+		if (chan->max_tx == 0 || chan->retry_count < chan->max_tx) {
+			l2cap_send_rr_or_rnr(chan, 1);
+			__set_monitor_timer(chan);
+			chan->retry_count++;
+		} else {
+			l2cap_send_disconn_req(chan, ECONNABORTED);
+		}
+		break;
+	default:
+		break;
+	}
+}
+
+static void l2cap_tx(struct l2cap_chan *chan, struct l2cap_ctrl *control,
+		     struct sk_buff_head *skbs, u8 event)
+{
+	BT_DBG("chan %p, control %p, skbs %p, event %d, state %d",
+	       chan, control, skbs, event, chan->tx_state);
+
+	switch (chan->tx_state) {
+	case L2CAP_TX_STATE_XMIT:
+		l2cap_tx_state_xmit(chan, control, skbs, event);
+		break;
+	case L2CAP_TX_STATE_WAIT_F:
+		l2cap_tx_state_wait_f(chan, control, skbs, event);
+		break;
+	default:
+		/* Ignore event */
+		break;
+	}
+}
+
+static void l2cap_pass_to_tx(struct l2cap_chan *chan,
+			     struct l2cap_ctrl *control)
+{
+	BT_DBG("chan %p, control %p", chan, control);
+	l2cap_tx(chan, control, NULL, L2CAP_EV_RECV_REQSEQ_AND_FBIT);
+}
+
+static void l2cap_pass_to_tx_fbit(struct l2cap_chan *chan,
+				  struct l2cap_ctrl *control)
+{
+	BT_DBG("chan %p, control %p", chan, control);
+	l2cap_tx(chan, control, NULL, L2CAP_EV_RECV_FBIT);
+}
+
+/* Copy frame to all raw sockets on that connection */
+static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+	struct sk_buff *nskb;
+	struct l2cap_chan *chan;
+
+	BT_DBG("conn %p", conn);
+
+	mutex_lock(&conn->chan_lock);
+
+	list_for_each_entry(chan, &conn->chan_l, list) {
+		if (chan->chan_type != L2CAP_CHAN_RAW)
+			continue;
+
+		/* Don't send frame to the channel it came from */
+		if (bt_cb(skb)->l2cap.chan == chan)
+			continue;
+
+		nskb = skb_clone(skb, GFP_KERNEL);
+		if (!nskb)
+			continue;
+		if (chan->ops->recv(chan, nskb))
+			kfree_skb(nskb);
+	}
+
+	mutex_unlock(&conn->chan_lock);
+}
+
+/* ---- L2CAP signalling commands ---- */
+static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, u8 code,
+				       u8 ident, u16 dlen, void *data)
+{
+	struct sk_buff *skb, **frag;
+	struct l2cap_cmd_hdr *cmd;
+	struct l2cap_hdr *lh;
+	int len, count;
+
+	BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %u",
+	       conn, code, ident, dlen);
+
+	if (conn->mtu < L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE)
+		return NULL;
+
+	len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen;
+	count = min_t(unsigned int, conn->mtu, len);
+
+	skb = bt_skb_alloc(count, GFP_KERNEL);
+	if (!skb)
+		return NULL;
+
+	lh = skb_put(skb, L2CAP_HDR_SIZE);
+	lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen);
+
+	if (conn->hcon->type == LE_LINK)
+		lh->cid = cpu_to_le16(L2CAP_CID_LE_SIGNALING);
+	else
+		lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING);
+
+	cmd = skb_put(skb, L2CAP_CMD_HDR_SIZE);
+	cmd->code  = code;
+	cmd->ident = ident;
+	cmd->len   = cpu_to_le16(dlen);
+
+	if (dlen) {
+		count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE;
+		skb_put_data(skb, data, count);
+		data += count;
+	}
+
+	len -= skb->len;
+
+	/* Continuation fragments (no L2CAP header) */
+	frag = &skb_shinfo(skb)->frag_list;
+	while (len) {
+		count = min_t(unsigned int, conn->mtu, len);
+
+		*frag = bt_skb_alloc(count, GFP_KERNEL);
+		if (!*frag)
+			goto fail;
+
+		skb_put_data(*frag, data, count);
+
+		len  -= count;
+		data += count;
+
+		frag = &(*frag)->next;
+	}
+
+	return skb;
+
+fail:
+	kfree_skb(skb);
+	return NULL;
+}
+
+static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen,
+				     unsigned long *val)
+{
+	struct l2cap_conf_opt *opt = *ptr;
+	int len;
+
+	len = L2CAP_CONF_OPT_SIZE + opt->len;
+	*ptr += len;
+
+	*type = opt->type;
+	*olen = opt->len;
+
+	switch (opt->len) {
+	case 1:
+		*val = *((u8 *) opt->val);
+		break;
+
+	case 2:
+		*val = get_unaligned_le16(opt->val);
+		break;
+
+	case 4:
+		*val = get_unaligned_le32(opt->val);
+		break;
+
+	default:
+		*val = (unsigned long) opt->val;
+		break;
+	}
+
+	BT_DBG("type 0x%2.2x len %u val 0x%lx", *type, opt->len, *val);
+	return len;
+}
+
+static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val, size_t size)
+{
+	struct l2cap_conf_opt *opt = *ptr;
+
+	BT_DBG("type 0x%2.2x len %u val 0x%lx", type, len, val);
+
+	if (size < L2CAP_CONF_OPT_SIZE + len)
+		return;
+
+	opt->type = type;
+	opt->len  = len;
+
+	switch (len) {
+	case 1:
+		*((u8 *) opt->val)  = val;
+		break;
+
+	case 2:
+		put_unaligned_le16(val, opt->val);
+		break;
+
+	case 4:
+		put_unaligned_le32(val, opt->val);
+		break;
+
+	default:
+		memcpy(opt->val, (void *) val, len);
+		break;
+	}
+
+	*ptr += L2CAP_CONF_OPT_SIZE + len;
+}
+
+static void l2cap_add_opt_efs(void **ptr, struct l2cap_chan *chan, size_t size)
+{
+	struct l2cap_conf_efs efs;
+
+	switch (chan->mode) {
+	case L2CAP_MODE_ERTM:
+		efs.id		= chan->local_id;
+		efs.stype	= chan->local_stype;
+		efs.msdu	= cpu_to_le16(chan->local_msdu);
+		efs.sdu_itime	= cpu_to_le32(chan->local_sdu_itime);
+		efs.acc_lat	= cpu_to_le32(L2CAP_DEFAULT_ACC_LAT);
+		efs.flush_to	= cpu_to_le32(L2CAP_EFS_DEFAULT_FLUSH_TO);
+		break;
+
+	case L2CAP_MODE_STREAMING:
+		efs.id		= 1;
+		efs.stype	= L2CAP_SERV_BESTEFFORT;
+		efs.msdu	= cpu_to_le16(chan->local_msdu);
+		efs.sdu_itime	= cpu_to_le32(chan->local_sdu_itime);
+		efs.acc_lat	= 0;
+		efs.flush_to	= 0;
+		break;
+
+	default:
+		return;
+	}
+
+	l2cap_add_conf_opt(ptr, L2CAP_CONF_EFS, sizeof(efs),
+			   (unsigned long) &efs, size);
+}
+
+static void l2cap_ack_timeout(struct work_struct *work)
+{
+	struct l2cap_chan *chan = container_of(work, struct l2cap_chan,
+					       ack_timer.work);
+	u16 frames_to_ack;
+
+	BT_DBG("chan %p", chan);
+
+	l2cap_chan_lock(chan);
+
+	frames_to_ack = __seq_offset(chan, chan->buffer_seq,
+				     chan->last_acked_seq);
+
+	if (frames_to_ack)
+		l2cap_send_rr_or_rnr(chan, 0);
+
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+}
+
+int l2cap_ertm_init(struct l2cap_chan *chan)
+{
+	int err;
+
+	chan->next_tx_seq = 0;
+	chan->expected_tx_seq = 0;
+	chan->expected_ack_seq = 0;
+	chan->unacked_frames = 0;
+	chan->buffer_seq = 0;
+	chan->frames_sent = 0;
+	chan->last_acked_seq = 0;
+	chan->sdu = NULL;
+	chan->sdu_last_frag = NULL;
+	chan->sdu_len = 0;
+
+	skb_queue_head_init(&chan->tx_q);
+
+	chan->local_amp_id = AMP_ID_BREDR;
+	chan->move_id = AMP_ID_BREDR;
+	chan->move_state = L2CAP_MOVE_STABLE;
+	chan->move_role = L2CAP_MOVE_ROLE_NONE;
+
+	if (chan->mode != L2CAP_MODE_ERTM)
+		return 0;
+
+	chan->rx_state = L2CAP_RX_STATE_RECV;
+	chan->tx_state = L2CAP_TX_STATE_XMIT;
+
+	skb_queue_head_init(&chan->srej_q);
+
+	err = l2cap_seq_list_init(&chan->srej_list, chan->tx_win);
+	if (err < 0)
+		return err;
+
+	err = l2cap_seq_list_init(&chan->retrans_list, chan->remote_tx_win);
+	if (err < 0)
+		l2cap_seq_list_free(&chan->srej_list);
+
+	return err;
+}
+
+static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask)
+{
+	switch (mode) {
+	case L2CAP_MODE_STREAMING:
+	case L2CAP_MODE_ERTM:
+		if (l2cap_mode_supported(mode, remote_feat_mask))
+			return mode;
+		fallthrough;
+	default:
+		return L2CAP_MODE_BASIC;
+	}
+}
+
+static inline bool __l2cap_ews_supported(struct l2cap_conn *conn)
+{
+	return ((conn->local_fixed_chan & L2CAP_FC_A2MP) &&
+		(conn->feat_mask & L2CAP_FEAT_EXT_WINDOW));
+}
+
+static inline bool __l2cap_efs_supported(struct l2cap_conn *conn)
+{
+	return ((conn->local_fixed_chan & L2CAP_FC_A2MP) &&
+		(conn->feat_mask & L2CAP_FEAT_EXT_FLOW));
+}
+
+static void __l2cap_set_ertm_timeouts(struct l2cap_chan *chan,
+				      struct l2cap_conf_rfc *rfc)
+{
+	if (chan->local_amp_id != AMP_ID_BREDR && chan->hs_hcon) {
+		u64 ertm_to = chan->hs_hcon->hdev->amp_be_flush_to;
+
+		/* Class 1 devices have must have ERTM timeouts
+		 * exceeding the Link Supervision Timeout.  The
+		 * default Link Supervision Timeout for AMP
+		 * controllers is 10 seconds.
+		 *
+		 * Class 1 devices use 0xffffffff for their
+		 * best-effort flush timeout, so the clamping logic
+		 * will result in a timeout that meets the above
+		 * requirement.  ERTM timeouts are 16-bit values, so
+		 * the maximum timeout is 65.535 seconds.
+		 */
+
+		/* Convert timeout to milliseconds and round */
+		ertm_to = DIV_ROUND_UP_ULL(ertm_to, 1000);
+
+		/* This is the recommended formula for class 2 devices
+		 * that start ERTM timers when packets are sent to the
+		 * controller.
+		 */
+		ertm_to = 3 * ertm_to + 500;
+
+		if (ertm_to > 0xffff)
+			ertm_to = 0xffff;
+
+		rfc->retrans_timeout = cpu_to_le16((u16) ertm_to);
+		rfc->monitor_timeout = rfc->retrans_timeout;
+	} else {
+		rfc->retrans_timeout = cpu_to_le16(L2CAP_DEFAULT_RETRANS_TO);
+		rfc->monitor_timeout = cpu_to_le16(L2CAP_DEFAULT_MONITOR_TO);
+	}
+}
+
+static inline void l2cap_txwin_setup(struct l2cap_chan *chan)
+{
+	if (chan->tx_win > L2CAP_DEFAULT_TX_WINDOW &&
+	    __l2cap_ews_supported(chan->conn)) {
+		/* use extended control field */
+		set_bit(FLAG_EXT_CTRL, &chan->flags);
+		chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW;
+	} else {
+		chan->tx_win = min_t(u16, chan->tx_win,
+				     L2CAP_DEFAULT_TX_WINDOW);
+		chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW;
+	}
+	chan->ack_win = chan->tx_win;
+}
+
+static void l2cap_mtu_auto(struct l2cap_chan *chan)
+{
+	struct hci_conn *conn = chan->conn->hcon;
+
+	chan->imtu = L2CAP_DEFAULT_MIN_MTU;
+
+	/* The 2-DH1 packet has between 2 and 56 information bytes
+	 * (including the 2-byte payload header)
+	 */
+	if (!(conn->pkt_type & HCI_2DH1))
+		chan->imtu = 54;
+
+	/* The 3-DH1 packet has between 2 and 85 information bytes
+	 * (including the 2-byte payload header)
+	 */
+	if (!(conn->pkt_type & HCI_3DH1))
+		chan->imtu = 83;
+
+	/* The 2-DH3 packet has between 2 and 369 information bytes
+	 * (including the 2-byte payload header)
+	 */
+	if (!(conn->pkt_type & HCI_2DH3))
+		chan->imtu = 367;
+
+	/* The 3-DH3 packet has between 2 and 554 information bytes
+	 * (including the 2-byte payload header)
+	 */
+	if (!(conn->pkt_type & HCI_3DH3))
+		chan->imtu = 552;
+
+	/* The 2-DH5 packet has between 2 and 681 information bytes
+	 * (including the 2-byte payload header)
+	 */
+	if (!(conn->pkt_type & HCI_2DH5))
+		chan->imtu = 679;
+
+	/* The 3-DH5 packet has between 2 and 1023 information bytes
+	 * (including the 2-byte payload header)
+	 */
+	if (!(conn->pkt_type & HCI_3DH5))
+		chan->imtu = 1021;
+}
+
+static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data, size_t data_size)
+{
+	struct l2cap_conf_req *req = data;
+	struct l2cap_conf_rfc rfc = { .mode = chan->mode };
+	void *ptr = req->data;
+	void *endptr = data + data_size;
+	u16 size;
+
+	BT_DBG("chan %p", chan);
+
+	if (chan->num_conf_req || chan->num_conf_rsp)
+		goto done;
+
+	switch (chan->mode) {
+	case L2CAP_MODE_STREAMING:
+	case L2CAP_MODE_ERTM:
+		if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state))
+			break;
+
+		if (__l2cap_efs_supported(chan->conn))
+			set_bit(FLAG_EFS_ENABLE, &chan->flags);
+
+		fallthrough;
+	default:
+		chan->mode = l2cap_select_mode(rfc.mode, chan->conn->feat_mask);
+		break;
+	}
+
+done:
+	if (chan->imtu != L2CAP_DEFAULT_MTU) {
+		if (!chan->imtu)
+			l2cap_mtu_auto(chan);
+		l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu,
+				   endptr - ptr);
+	}
+
+	switch (chan->mode) {
+	case L2CAP_MODE_BASIC:
+		if (disable_ertm)
+			break;
+
+		if (!(chan->conn->feat_mask & L2CAP_FEAT_ERTM) &&
+		    !(chan->conn->feat_mask & L2CAP_FEAT_STREAMING))
+			break;
+
+		rfc.mode            = L2CAP_MODE_BASIC;
+		rfc.txwin_size      = 0;
+		rfc.max_transmit    = 0;
+		rfc.retrans_timeout = 0;
+		rfc.monitor_timeout = 0;
+		rfc.max_pdu_size    = 0;
+
+		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
+				   (unsigned long) &rfc, endptr - ptr);
+		break;
+
+	case L2CAP_MODE_ERTM:
+		rfc.mode            = L2CAP_MODE_ERTM;
+		rfc.max_transmit    = chan->max_tx;
+
+		__l2cap_set_ertm_timeouts(chan, &rfc);
+
+		size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu -
+			     L2CAP_EXT_HDR_SIZE - L2CAP_SDULEN_SIZE -
+			     L2CAP_FCS_SIZE);
+		rfc.max_pdu_size = cpu_to_le16(size);
+
+		l2cap_txwin_setup(chan);
+
+		rfc.txwin_size = min_t(u16, chan->tx_win,
+				       L2CAP_DEFAULT_TX_WINDOW);
+
+		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
+				   (unsigned long) &rfc, endptr - ptr);
+
+		if (test_bit(FLAG_EFS_ENABLE, &chan->flags))
+			l2cap_add_opt_efs(&ptr, chan, endptr - ptr);
+
+		if (test_bit(FLAG_EXT_CTRL, &chan->flags))
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2,
+					   chan->tx_win, endptr - ptr);
+
+		if (chan->conn->feat_mask & L2CAP_FEAT_FCS)
+			if (chan->fcs == L2CAP_FCS_NONE ||
+			    test_bit(CONF_RECV_NO_FCS, &chan->conf_state)) {
+				chan->fcs = L2CAP_FCS_NONE;
+				l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1,
+						   chan->fcs, endptr - ptr);
+			}
+		break;
+
+	case L2CAP_MODE_STREAMING:
+		l2cap_txwin_setup(chan);
+		rfc.mode            = L2CAP_MODE_STREAMING;
+		rfc.txwin_size      = 0;
+		rfc.max_transmit    = 0;
+		rfc.retrans_timeout = 0;
+		rfc.monitor_timeout = 0;
+
+		size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu -
+			     L2CAP_EXT_HDR_SIZE - L2CAP_SDULEN_SIZE -
+			     L2CAP_FCS_SIZE);
+		rfc.max_pdu_size = cpu_to_le16(size);
+
+		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
+				   (unsigned long) &rfc, endptr - ptr);
+
+		if (test_bit(FLAG_EFS_ENABLE, &chan->flags))
+			l2cap_add_opt_efs(&ptr, chan, endptr - ptr);
+
+		if (chan->conn->feat_mask & L2CAP_FEAT_FCS)
+			if (chan->fcs == L2CAP_FCS_NONE ||
+			    test_bit(CONF_RECV_NO_FCS, &chan->conf_state)) {
+				chan->fcs = L2CAP_FCS_NONE;
+				l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1,
+						   chan->fcs, endptr - ptr);
+			}
+		break;
+	}
+
+	req->dcid  = cpu_to_le16(chan->dcid);
+	req->flags = cpu_to_le16(0);
+
+	return ptr - data;
+}
+
+static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data, size_t data_size)
+{
+	struct l2cap_conf_rsp *rsp = data;
+	void *ptr = rsp->data;
+	void *endptr = data + data_size;
+	void *req = chan->conf_req;
+	int len = chan->conf_len;
+	int type, hint, olen;
+	unsigned long val;
+	struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC };
+	struct l2cap_conf_efs efs;
+	u8 remote_efs = 0;
+	u16 mtu = L2CAP_DEFAULT_MTU;
+	u16 result = L2CAP_CONF_SUCCESS;
+	u16 size;
+
+	BT_DBG("chan %p", chan);
+
+	while (len >= L2CAP_CONF_OPT_SIZE) {
+		len -= l2cap_get_conf_opt(&req, &type, &olen, &val);
+		if (len < 0)
+			break;
+
+		hint  = type & L2CAP_CONF_HINT;
+		type &= L2CAP_CONF_MASK;
+
+		switch (type) {
+		case L2CAP_CONF_MTU:
+			if (olen != 2)
+				break;
+			mtu = val;
+			break;
+
+		case L2CAP_CONF_FLUSH_TO:
+			if (olen != 2)
+				break;
+			chan->flush_to = val;
+			break;
+
+		case L2CAP_CONF_QOS:
+			break;
+
+		case L2CAP_CONF_RFC:
+			if (olen != sizeof(rfc))
+				break;
+			memcpy(&rfc, (void *) val, olen);
+			break;
+
+		case L2CAP_CONF_FCS:
+			if (olen != 1)
+				break;
+			if (val == L2CAP_FCS_NONE)
+				set_bit(CONF_RECV_NO_FCS, &chan->conf_state);
+			break;
+
+		case L2CAP_CONF_EFS:
+			if (olen != sizeof(efs))
+				break;
+			remote_efs = 1;
+			memcpy(&efs, (void *) val, olen);
+			break;
+
+		case L2CAP_CONF_EWS:
+			if (olen != 2)
+				break;
+			if (!(chan->conn->local_fixed_chan & L2CAP_FC_A2MP))
+				return -ECONNREFUSED;
+			set_bit(FLAG_EXT_CTRL, &chan->flags);
+			set_bit(CONF_EWS_RECV, &chan->conf_state);
+			chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW;
+			chan->remote_tx_win = val;
+			break;
+
+		default:
+			if (hint)
+				break;
+			result = L2CAP_CONF_UNKNOWN;
+			*((u8 *) ptr++) = type;
+			break;
+		}
+	}
+
+	if (chan->num_conf_rsp || chan->num_conf_req > 1)
+		goto done;
+
+	switch (chan->mode) {
+	case L2CAP_MODE_STREAMING:
+	case L2CAP_MODE_ERTM:
+		if (!test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) {
+			chan->mode = l2cap_select_mode(rfc.mode,
+						       chan->conn->feat_mask);
+			break;
+		}
+
+		if (remote_efs) {
+			if (__l2cap_efs_supported(chan->conn))
+				set_bit(FLAG_EFS_ENABLE, &chan->flags);
+			else
+				return -ECONNREFUSED;
+		}
+
+		if (chan->mode != rfc.mode)
+			return -ECONNREFUSED;
+
+		break;
+	}
+
+done:
+	if (chan->mode != rfc.mode) {
+		result = L2CAP_CONF_UNACCEPT;
+		rfc.mode = chan->mode;
+
+		if (chan->num_conf_rsp == 1)
+			return -ECONNREFUSED;
+
+		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
+				   (unsigned long) &rfc, endptr - ptr);
+	}
+
+	if (result == L2CAP_CONF_SUCCESS) {
+		/* Configure output options and let the other side know
+		 * which ones we don't like. */
+
+		if (mtu < L2CAP_DEFAULT_MIN_MTU)
+			result = L2CAP_CONF_UNACCEPT;
+		else {
+			chan->omtu = mtu;
+			set_bit(CONF_MTU_DONE, &chan->conf_state);
+		}
+		l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->omtu, endptr - ptr);
+
+		if (remote_efs) {
+			if (chan->local_stype != L2CAP_SERV_NOTRAFIC &&
+			    efs.stype != L2CAP_SERV_NOTRAFIC &&
+			    efs.stype != chan->local_stype) {
+
+				result = L2CAP_CONF_UNACCEPT;
+
+				if (chan->num_conf_req >= 1)
+					return -ECONNREFUSED;
+
+				l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS,
+						   sizeof(efs),
+						   (unsigned long) &efs, endptr - ptr);
+			} else {
+				/* Send PENDING Conf Rsp */
+				result = L2CAP_CONF_PENDING;
+				set_bit(CONF_LOC_CONF_PEND, &chan->conf_state);
+			}
+		}
+
+		switch (rfc.mode) {
+		case L2CAP_MODE_BASIC:
+			chan->fcs = L2CAP_FCS_NONE;
+			set_bit(CONF_MODE_DONE, &chan->conf_state);
+			break;
+
+		case L2CAP_MODE_ERTM:
+			if (!test_bit(CONF_EWS_RECV, &chan->conf_state))
+				chan->remote_tx_win = rfc.txwin_size;
+			else
+				rfc.txwin_size = L2CAP_DEFAULT_TX_WINDOW;
+
+			chan->remote_max_tx = rfc.max_transmit;
+
+			size = min_t(u16, le16_to_cpu(rfc.max_pdu_size),
+				     chan->conn->mtu - L2CAP_EXT_HDR_SIZE -
+				     L2CAP_SDULEN_SIZE - L2CAP_FCS_SIZE);
+			rfc.max_pdu_size = cpu_to_le16(size);
+			chan->remote_mps = size;
+
+			__l2cap_set_ertm_timeouts(chan, &rfc);
+
+			set_bit(CONF_MODE_DONE, &chan->conf_state);
+
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
+					   sizeof(rfc), (unsigned long) &rfc, endptr - ptr);
+
+			if (remote_efs &&
+			    test_bit(FLAG_EFS_ENABLE, &chan->flags)) {
+				chan->remote_id = efs.id;
+				chan->remote_stype = efs.stype;
+				chan->remote_msdu = le16_to_cpu(efs.msdu);
+				chan->remote_flush_to =
+					le32_to_cpu(efs.flush_to);
+				chan->remote_acc_lat =
+					le32_to_cpu(efs.acc_lat);
+				chan->remote_sdu_itime =
+					le32_to_cpu(efs.sdu_itime);
+				l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS,
+						   sizeof(efs),
+						   (unsigned long) &efs, endptr - ptr);
+			}
+			break;
+
+		case L2CAP_MODE_STREAMING:
+			size = min_t(u16, le16_to_cpu(rfc.max_pdu_size),
+				     chan->conn->mtu - L2CAP_EXT_HDR_SIZE -
+				     L2CAP_SDULEN_SIZE - L2CAP_FCS_SIZE);
+			rfc.max_pdu_size = cpu_to_le16(size);
+			chan->remote_mps = size;
+
+			set_bit(CONF_MODE_DONE, &chan->conf_state);
+
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
+					   (unsigned long) &rfc, endptr - ptr);
+
+			break;
+
+		default:
+			result = L2CAP_CONF_UNACCEPT;
+
+			memset(&rfc, 0, sizeof(rfc));
+			rfc.mode = chan->mode;
+		}
+
+		if (result == L2CAP_CONF_SUCCESS)
+			set_bit(CONF_OUTPUT_DONE, &chan->conf_state);
+	}
+	rsp->scid   = cpu_to_le16(chan->dcid);
+	rsp->result = cpu_to_le16(result);
+	rsp->flags  = cpu_to_le16(0);
+
+	return ptr - data;
+}
+
+static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len,
+				void *data, size_t size, u16 *result)
+{
+	struct l2cap_conf_req *req = data;
+	void *ptr = req->data;
+	void *endptr = data + size;
+	int type, olen;
+	unsigned long val;
+	struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC };
+	struct l2cap_conf_efs efs;
+
+	BT_DBG("chan %p, rsp %p, len %d, req %p", chan, rsp, len, data);
+
+	while (len >= L2CAP_CONF_OPT_SIZE) {
+		len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val);
+		if (len < 0)
+			break;
+
+		switch (type) {
+		case L2CAP_CONF_MTU:
+			if (olen != 2)
+				break;
+			if (val < L2CAP_DEFAULT_MIN_MTU) {
+				*result = L2CAP_CONF_UNACCEPT;
+				chan->imtu = L2CAP_DEFAULT_MIN_MTU;
+			} else
+				chan->imtu = val;
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu,
+					   endptr - ptr);
+			break;
+
+		case L2CAP_CONF_FLUSH_TO:
+			if (olen != 2)
+				break;
+			chan->flush_to = val;
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2,
+					   chan->flush_to, endptr - ptr);
+			break;
+
+		case L2CAP_CONF_RFC:
+			if (olen != sizeof(rfc))
+				break;
+			memcpy(&rfc, (void *)val, olen);
+			if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state) &&
+			    rfc.mode != chan->mode)
+				return -ECONNREFUSED;
+			chan->fcs = 0;
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
+					   (unsigned long) &rfc, endptr - ptr);
+			break;
+
+		case L2CAP_CONF_EWS:
+			if (olen != 2)
+				break;
+			chan->ack_win = min_t(u16, val, chan->ack_win);
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2,
+					   chan->tx_win, endptr - ptr);
+			break;
+
+		case L2CAP_CONF_EFS:
+			if (olen != sizeof(efs))
+				break;
+			memcpy(&efs, (void *)val, olen);
+			if (chan->local_stype != L2CAP_SERV_NOTRAFIC &&
+			    efs.stype != L2CAP_SERV_NOTRAFIC &&
+			    efs.stype != chan->local_stype)
+				return -ECONNREFUSED;
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, sizeof(efs),
+					   (unsigned long) &efs, endptr - ptr);
+			break;
+
+		case L2CAP_CONF_FCS:
+			if (olen != 1)
+				break;
+			if (*result == L2CAP_CONF_PENDING)
+				if (val == L2CAP_FCS_NONE)
+					set_bit(CONF_RECV_NO_FCS,
+						&chan->conf_state);
+			break;
+		}
+	}
+
+	if (chan->mode == L2CAP_MODE_BASIC && chan->mode != rfc.mode)
+		return -ECONNREFUSED;
+
+	chan->mode = rfc.mode;
+
+	if (*result == L2CAP_CONF_SUCCESS || *result == L2CAP_CONF_PENDING) {
+		switch (rfc.mode) {
+		case L2CAP_MODE_ERTM:
+			chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout);
+			chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout);
+			chan->mps    = le16_to_cpu(rfc.max_pdu_size);
+			if (!test_bit(FLAG_EXT_CTRL, &chan->flags))
+				chan->ack_win = min_t(u16, chan->ack_win,
+						      rfc.txwin_size);
+
+			if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) {
+				chan->local_msdu = le16_to_cpu(efs.msdu);
+				chan->local_sdu_itime =
+					le32_to_cpu(efs.sdu_itime);
+				chan->local_acc_lat = le32_to_cpu(efs.acc_lat);
+				chan->local_flush_to =
+					le32_to_cpu(efs.flush_to);
+			}
+			break;
+
+		case L2CAP_MODE_STREAMING:
+			chan->mps    = le16_to_cpu(rfc.max_pdu_size);
+		}
+	}
+
+	req->dcid   = cpu_to_le16(chan->dcid);
+	req->flags  = cpu_to_le16(0);
+
+	return ptr - data;
+}
+
+static int l2cap_build_conf_rsp(struct l2cap_chan *chan, void *data,
+				u16 result, u16 flags)
+{
+	struct l2cap_conf_rsp *rsp = data;
+	void *ptr = rsp->data;
+
+	BT_DBG("chan %p", chan);
+
+	rsp->scid   = cpu_to_le16(chan->dcid);
+	rsp->result = cpu_to_le16(result);
+	rsp->flags  = cpu_to_le16(flags);
+
+	return ptr - data;
+}
+
+void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan)
+{
+	struct l2cap_le_conn_rsp rsp;
+	struct l2cap_conn *conn = chan->conn;
+
+	BT_DBG("chan %p", chan);
+
+	rsp.dcid    = cpu_to_le16(chan->scid);
+	rsp.mtu     = cpu_to_le16(chan->imtu);
+	rsp.mps     = cpu_to_le16(chan->mps);
+	rsp.credits = cpu_to_le16(chan->rx_credits);
+	rsp.result  = cpu_to_le16(L2CAP_CR_LE_SUCCESS);
+
+	l2cap_send_cmd(conn, chan->ident, L2CAP_LE_CONN_RSP, sizeof(rsp),
+		       &rsp);
+}
+
+static void l2cap_ecred_list_defer(struct l2cap_chan *chan, void *data)
+{
+	int *result = data;
+
+	if (*result || test_bit(FLAG_ECRED_CONN_REQ_SENT, &chan->flags))
+		return;
+
+	switch (chan->state) {
+	case BT_CONNECT2:
+		/* If channel still pending accept add to result */
+		(*result)++;
+		return;
+	case BT_CONNECTED:
+		return;
+	default:
+		/* If not connected or pending accept it has been refused */
+		*result = -ECONNREFUSED;
+		return;
+	}
+}
+
+struct l2cap_ecred_rsp_data {
+	struct {
+		struct l2cap_ecred_conn_rsp rsp;
+		__le16 scid[L2CAP_ECRED_MAX_CID];
+	} __packed pdu;
+	int count;
+};
+
+static void l2cap_ecred_rsp_defer(struct l2cap_chan *chan, void *data)
+{
+	struct l2cap_ecred_rsp_data *rsp = data;
+
+	if (test_bit(FLAG_ECRED_CONN_REQ_SENT, &chan->flags))
+		return;
+
+	/* Reset ident so only one response is sent */
+	chan->ident = 0;
+
+	/* Include all channels pending with the same ident */
+	if (!rsp->pdu.rsp.result)
+		rsp->pdu.rsp.dcid[rsp->count++] = cpu_to_le16(chan->scid);
+	else
+		l2cap_chan_del(chan, ECONNRESET);
+}
+
+void __l2cap_ecred_conn_rsp_defer(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct l2cap_ecred_rsp_data data;
+	u16 id = chan->ident;
+	int result = 0;
+
+	if (!id)
+		return;
+
+	BT_DBG("chan %p id %d", chan, id);
+
+	memset(&data, 0, sizeof(data));
+
+	data.pdu.rsp.mtu     = cpu_to_le16(chan->imtu);
+	data.pdu.rsp.mps     = cpu_to_le16(chan->mps);
+	data.pdu.rsp.credits = cpu_to_le16(chan->rx_credits);
+	data.pdu.rsp.result  = cpu_to_le16(L2CAP_CR_LE_SUCCESS);
+
+	/* Verify that all channels are ready */
+	__l2cap_chan_list_id(conn, id, l2cap_ecred_list_defer, &result);
+
+	if (result > 0)
+		return;
+
+	if (result < 0)
+		data.pdu.rsp.result = cpu_to_le16(L2CAP_CR_LE_AUTHORIZATION);
+
+	/* Build response */
+	__l2cap_chan_list_id(conn, id, l2cap_ecred_rsp_defer, &data);
+
+	l2cap_send_cmd(conn, id, L2CAP_ECRED_CONN_RSP,
+		       sizeof(data.pdu.rsp) + (data.count * sizeof(__le16)),
+		       &data.pdu);
+}
+
+void __l2cap_connect_rsp_defer(struct l2cap_chan *chan)
+{
+	struct l2cap_conn_rsp rsp;
+	struct l2cap_conn *conn = chan->conn;
+	u8 buf[128];
+	u8 rsp_code;
+
+	rsp.scid   = cpu_to_le16(chan->dcid);
+	rsp.dcid   = cpu_to_le16(chan->scid);
+	rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS);
+	rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
+
+	if (chan->hs_hcon)
+		rsp_code = L2CAP_CREATE_CHAN_RSP;
+	else
+		rsp_code = L2CAP_CONN_RSP;
+
+	BT_DBG("chan %p rsp_code %u", chan, rsp_code);
+
+	l2cap_send_cmd(conn, chan->ident, rsp_code, sizeof(rsp), &rsp);
+
+	if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state))
+		return;
+
+	l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
+		       l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
+	chan->num_conf_req++;
+}
+
+static void l2cap_conf_rfc_get(struct l2cap_chan *chan, void *rsp, int len)
+{
+	int type, olen;
+	unsigned long val;
+	/* Use sane default values in case a misbehaving remote device
+	 * did not send an RFC or extended window size option.
+	 */
+	u16 txwin_ext = chan->ack_win;
+	struct l2cap_conf_rfc rfc = {
+		.mode = chan->mode,
+		.retrans_timeout = cpu_to_le16(L2CAP_DEFAULT_RETRANS_TO),
+		.monitor_timeout = cpu_to_le16(L2CAP_DEFAULT_MONITOR_TO),
+		.max_pdu_size = cpu_to_le16(chan->imtu),
+		.txwin_size = min_t(u16, chan->ack_win, L2CAP_DEFAULT_TX_WINDOW),
+	};
+
+	BT_DBG("chan %p, rsp %p, len %d", chan, rsp, len);
+
+	if ((chan->mode != L2CAP_MODE_ERTM) && (chan->mode != L2CAP_MODE_STREAMING))
+		return;
+
+	while (len >= L2CAP_CONF_OPT_SIZE) {
+		len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val);
+		if (len < 0)
+			break;
+
+		switch (type) {
+		case L2CAP_CONF_RFC:
+			if (olen != sizeof(rfc))
+				break;
+			memcpy(&rfc, (void *)val, olen);
+			break;
+		case L2CAP_CONF_EWS:
+			if (olen != 2)
+				break;
+			txwin_ext = val;
+			break;
+		}
+	}
+
+	switch (rfc.mode) {
+	case L2CAP_MODE_ERTM:
+		chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout);
+		chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout);
+		chan->mps = le16_to_cpu(rfc.max_pdu_size);
+		if (test_bit(FLAG_EXT_CTRL, &chan->flags))
+			chan->ack_win = min_t(u16, chan->ack_win, txwin_ext);
+		else
+			chan->ack_win = min_t(u16, chan->ack_win,
+					      rfc.txwin_size);
+		break;
+	case L2CAP_MODE_STREAMING:
+		chan->mps    = le16_to_cpu(rfc.max_pdu_size);
+	}
+}
+
+static inline int l2cap_command_rej(struct l2cap_conn *conn,
+				    struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				    u8 *data)
+{
+	struct l2cap_cmd_rej_unk *rej = (struct l2cap_cmd_rej_unk *) data;
+
+	if (cmd_len < sizeof(*rej))
+		return -EPROTO;
+
+	if (rej->reason != L2CAP_REJ_NOT_UNDERSTOOD)
+		return 0;
+
+	if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) &&
+	    cmd->ident == conn->info_ident) {
+		cancel_delayed_work(&conn->info_timer);
+
+		conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
+		conn->info_ident = 0;
+
+		l2cap_conn_start(conn);
+	}
+
+	return 0;
+}
+
+static struct l2cap_chan *l2cap_connect(struct l2cap_conn *conn,
+					struct l2cap_cmd_hdr *cmd,
+					u8 *data, u8 rsp_code, u8 amp_id)
+{
+	struct l2cap_conn_req *req = (struct l2cap_conn_req *) data;
+	struct l2cap_conn_rsp rsp;
+	struct l2cap_chan *chan = NULL, *pchan;
+	int result, status = L2CAP_CS_NO_INFO;
+
+	u16 dcid = 0, scid = __le16_to_cpu(req->scid);
+	__le16 psm = req->psm;
+
+	BT_DBG("psm 0x%2.2x scid 0x%4.4x", __le16_to_cpu(psm), scid);
+
+	/* Check if we have socket listening on psm */
+	pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, &conn->hcon->src,
+					 &conn->hcon->dst, ACL_LINK);
+	if (!pchan) {
+		result = L2CAP_CR_BAD_PSM;
+		goto sendresp;
+	}
+
+	mutex_lock(&conn->chan_lock);
+	l2cap_chan_lock(pchan);
+
+	/* Check if the ACL is secure enough (if not SDP) */
+	if (psm != cpu_to_le16(L2CAP_PSM_SDP) &&
+	    !hci_conn_check_link_mode(conn->hcon)) {
+		conn->disc_reason = HCI_ERROR_AUTH_FAILURE;
+		result = L2CAP_CR_SEC_BLOCK;
+		goto response;
+	}
+
+	result = L2CAP_CR_NO_MEM;
+
+	/* Check for valid dynamic CID range (as per Erratum 3253) */
+	if (scid < L2CAP_CID_DYN_START || scid > L2CAP_CID_DYN_END) {
+		result = L2CAP_CR_INVALID_SCID;
+		goto response;
+	}
+
+	/* Check if we already have channel with that dcid */
+	if (__l2cap_get_chan_by_dcid(conn, scid)) {
+		result = L2CAP_CR_SCID_IN_USE;
+		goto response;
+	}
+
+	chan = pchan->ops->new_connection(pchan);
+	if (!chan)
+		goto response;
+
+	/* For certain devices (ex: HID mouse), support for authentication,
+	 * pairing and bonding is optional. For such devices, inorder to avoid
+	 * the ACL alive for too long after L2CAP disconnection, reset the ACL
+	 * disc_timeout back to HCI_DISCONN_TIMEOUT during L2CAP connect.
+	 */
+	conn->hcon->disc_timeout = HCI_DISCONN_TIMEOUT;
+
+	bacpy(&chan->src, &conn->hcon->src);
+	bacpy(&chan->dst, &conn->hcon->dst);
+	chan->src_type = bdaddr_src_type(conn->hcon);
+	chan->dst_type = bdaddr_dst_type(conn->hcon);
+	chan->psm  = psm;
+	chan->dcid = scid;
+	chan->local_amp_id = amp_id;
+
+	__l2cap_chan_add(conn, chan);
+
+	dcid = chan->scid;
+
+	__set_chan_timer(chan, chan->ops->get_sndtimeo(chan));
+
+	chan->ident = cmd->ident;
+
+	if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) {
+		if (l2cap_chan_check_security(chan, false)) {
+			if (test_bit(FLAG_DEFER_SETUP, &chan->flags)) {
+				l2cap_state_change(chan, BT_CONNECT2);
+				result = L2CAP_CR_PEND;
+				status = L2CAP_CS_AUTHOR_PEND;
+				chan->ops->defer(chan);
+			} else {
+				/* Force pending result for AMP controllers.
+				 * The connection will succeed after the
+				 * physical link is up.
+				 */
+				if (amp_id == AMP_ID_BREDR) {
+					l2cap_state_change(chan, BT_CONFIG);
+					result = L2CAP_CR_SUCCESS;
+				} else {
+					l2cap_state_change(chan, BT_CONNECT2);
+					result = L2CAP_CR_PEND;
+				}
+				status = L2CAP_CS_NO_INFO;
+			}
+		} else {
+			l2cap_state_change(chan, BT_CONNECT2);
+			result = L2CAP_CR_PEND;
+			status = L2CAP_CS_AUTHEN_PEND;
+		}
+	} else {
+		l2cap_state_change(chan, BT_CONNECT2);
+		result = L2CAP_CR_PEND;
+		status = L2CAP_CS_NO_INFO;
+	}
+
+response:
+	l2cap_chan_unlock(pchan);
+	mutex_unlock(&conn->chan_lock);
+	l2cap_chan_put(pchan);
+
+sendresp:
+	rsp.scid   = cpu_to_le16(scid);
+	rsp.dcid   = cpu_to_le16(dcid);
+	rsp.result = cpu_to_le16(result);
+	rsp.status = cpu_to_le16(status);
+	l2cap_send_cmd(conn, cmd->ident, rsp_code, sizeof(rsp), &rsp);
+
+	if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) {
+		struct l2cap_info_req info;
+		info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK);
+
+		conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT;
+		conn->info_ident = l2cap_get_ident(conn);
+
+		schedule_delayed_work(&conn->info_timer, L2CAP_INFO_TIMEOUT);
+
+		l2cap_send_cmd(conn, conn->info_ident, L2CAP_INFO_REQ,
+			       sizeof(info), &info);
+	}
+
+	if (chan && !test_bit(CONF_REQ_SENT, &chan->conf_state) &&
+	    result == L2CAP_CR_SUCCESS) {
+		u8 buf[128];
+		set_bit(CONF_REQ_SENT, &chan->conf_state);
+		l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
+			       l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
+		chan->num_conf_req++;
+	}
+
+	return chan;
+}
+
+static int l2cap_connect_req(struct l2cap_conn *conn,
+			     struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data)
+{
+	struct hci_dev *hdev = conn->hcon->hdev;
+	struct hci_conn *hcon = conn->hcon;
+
+	if (cmd_len < sizeof(struct l2cap_conn_req))
+		return -EPROTO;
+
+	hci_dev_lock(hdev);
+	if (hci_dev_test_flag(hdev, HCI_MGMT) &&
+	    !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &hcon->flags))
+		mgmt_device_connected(hdev, hcon, 0, NULL, 0);
+	hci_dev_unlock(hdev);
+
+	l2cap_connect(conn, cmd, data, L2CAP_CONN_RSP, 0);
+	return 0;
+}
+
+static int l2cap_connect_create_rsp(struct l2cap_conn *conn,
+				    struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				    u8 *data)
+{
+	struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data;
+	u16 scid, dcid, result, status;
+	struct l2cap_chan *chan;
+	u8 req[128];
+	int err;
+
+	if (cmd_len < sizeof(*rsp))
+		return -EPROTO;
+
+	scid   = __le16_to_cpu(rsp->scid);
+	dcid   = __le16_to_cpu(rsp->dcid);
+	result = __le16_to_cpu(rsp->result);
+	status = __le16_to_cpu(rsp->status);
+
+	if (result == L2CAP_CR_SUCCESS && (dcid < L2CAP_CID_DYN_START ||
+					   dcid > L2CAP_CID_DYN_END))
+		return -EPROTO;
+
+	BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x",
+	       dcid, scid, result, status);
+
+	mutex_lock(&conn->chan_lock);
+
+	if (scid) {
+		chan = __l2cap_get_chan_by_scid(conn, scid);
+		if (!chan) {
+			err = -EBADSLT;
+			goto unlock;
+		}
+	} else {
+		chan = __l2cap_get_chan_by_ident(conn, cmd->ident);
+		if (!chan) {
+			err = -EBADSLT;
+			goto unlock;
+		}
+	}
+
+	chan = l2cap_chan_hold_unless_zero(chan);
+	if (!chan) {
+		err = -EBADSLT;
+		goto unlock;
+	}
+
+	err = 0;
+
+	l2cap_chan_lock(chan);
+
+	switch (result) {
+	case L2CAP_CR_SUCCESS:
+		if (__l2cap_get_chan_by_dcid(conn, dcid)) {
+			err = -EBADSLT;
+			break;
+		}
+
+		l2cap_state_change(chan, BT_CONFIG);
+		chan->ident = 0;
+		chan->dcid = dcid;
+		clear_bit(CONF_CONNECT_PEND, &chan->conf_state);
+
+		if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state))
+			break;
+
+		l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
+			       l2cap_build_conf_req(chan, req, sizeof(req)), req);
+		chan->num_conf_req++;
+		break;
+
+	case L2CAP_CR_PEND:
+		set_bit(CONF_CONNECT_PEND, &chan->conf_state);
+		break;
+
+	default:
+		l2cap_chan_del(chan, ECONNREFUSED);
+		break;
+	}
+
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+
+unlock:
+	mutex_unlock(&conn->chan_lock);
+
+	return err;
+}
+
+static inline void set_default_fcs(struct l2cap_chan *chan)
+{
+	/* FCS is enabled only in ERTM or streaming mode, if one or both
+	 * sides request it.
+	 */
+	if (chan->mode != L2CAP_MODE_ERTM && chan->mode != L2CAP_MODE_STREAMING)
+		chan->fcs = L2CAP_FCS_NONE;
+	else if (!test_bit(CONF_RECV_NO_FCS, &chan->conf_state))
+		chan->fcs = L2CAP_FCS_CRC16;
+}
+
+static void l2cap_send_efs_conf_rsp(struct l2cap_chan *chan, void *data,
+				    u8 ident, u16 flags)
+{
+	struct l2cap_conn *conn = chan->conn;
+
+	BT_DBG("conn %p chan %p ident %d flags 0x%4.4x", conn, chan, ident,
+	       flags);
+
+	clear_bit(CONF_LOC_CONF_PEND, &chan->conf_state);
+	set_bit(CONF_OUTPUT_DONE, &chan->conf_state);
+
+	l2cap_send_cmd(conn, ident, L2CAP_CONF_RSP,
+		       l2cap_build_conf_rsp(chan, data,
+					    L2CAP_CONF_SUCCESS, flags), data);
+}
+
+static void cmd_reject_invalid_cid(struct l2cap_conn *conn, u8 ident,
+				   u16 scid, u16 dcid)
+{
+	struct l2cap_cmd_rej_cid rej;
+
+	rej.reason = cpu_to_le16(L2CAP_REJ_INVALID_CID);
+	rej.scid = __cpu_to_le16(scid);
+	rej.dcid = __cpu_to_le16(dcid);
+
+	l2cap_send_cmd(conn, ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej);
+}
+
+static inline int l2cap_config_req(struct l2cap_conn *conn,
+				   struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				   u8 *data)
+{
+	struct l2cap_conf_req *req = (struct l2cap_conf_req *) data;
+	u16 dcid, flags;
+	u8 rsp[64];
+	struct l2cap_chan *chan;
+	int len, err = 0;
+
+	if (cmd_len < sizeof(*req))
+		return -EPROTO;
+
+	dcid  = __le16_to_cpu(req->dcid);
+	flags = __le16_to_cpu(req->flags);
+
+	BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags);
+
+	chan = l2cap_get_chan_by_scid(conn, dcid);
+	if (!chan) {
+		cmd_reject_invalid_cid(conn, cmd->ident, dcid, 0);
+		return 0;
+	}
+
+	if (chan->state != BT_CONFIG && chan->state != BT_CONNECT2 &&
+	    chan->state != BT_CONNECTED) {
+		cmd_reject_invalid_cid(conn, cmd->ident, chan->scid,
+				       chan->dcid);
+		goto unlock;
+	}
+
+	/* Reject if config buffer is too small. */
+	len = cmd_len - sizeof(*req);
+	if (chan->conf_len + len > sizeof(chan->conf_req)) {
+		l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP,
+			       l2cap_build_conf_rsp(chan, rsp,
+			       L2CAP_CONF_REJECT, flags), rsp);
+		goto unlock;
+	}
+
+	/* Store config. */
+	memcpy(chan->conf_req + chan->conf_len, req->data, len);
+	chan->conf_len += len;
+
+	if (flags & L2CAP_CONF_FLAG_CONTINUATION) {
+		/* Incomplete config. Send empty response. */
+		l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP,
+			       l2cap_build_conf_rsp(chan, rsp,
+			       L2CAP_CONF_SUCCESS, flags), rsp);
+		goto unlock;
+	}
+
+	/* Complete config. */
+	len = l2cap_parse_conf_req(chan, rsp, sizeof(rsp));
+	if (len < 0) {
+		l2cap_send_disconn_req(chan, ECONNRESET);
+		goto unlock;
+	}
+
+	chan->ident = cmd->ident;
+	l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp);
+	if (chan->num_conf_rsp < L2CAP_CONF_MAX_CONF_RSP)
+		chan->num_conf_rsp++;
+
+	/* Reset config buffer. */
+	chan->conf_len = 0;
+
+	if (!test_bit(CONF_OUTPUT_DONE, &chan->conf_state))
+		goto unlock;
+
+	if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) {
+		set_default_fcs(chan);
+
+		if (chan->mode == L2CAP_MODE_ERTM ||
+		    chan->mode == L2CAP_MODE_STREAMING)
+			err = l2cap_ertm_init(chan);
+
+		if (err < 0)
+			l2cap_send_disconn_req(chan, -err);
+		else
+			l2cap_chan_ready(chan);
+
+		goto unlock;
+	}
+
+	if (!test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) {
+		u8 buf[64];
+		l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
+			       l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
+		chan->num_conf_req++;
+	}
+
+	/* Got Conf Rsp PENDING from remote side and assume we sent
+	   Conf Rsp PENDING in the code above */
+	if (test_bit(CONF_REM_CONF_PEND, &chan->conf_state) &&
+	    test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) {
+
+		/* check compatibility */
+
+		/* Send rsp for BR/EDR channel */
+		if (!chan->hs_hcon)
+			l2cap_send_efs_conf_rsp(chan, rsp, cmd->ident, flags);
+		else
+			chan->ident = cmd->ident;
+	}
+
+unlock:
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+	return err;
+}
+
+static inline int l2cap_config_rsp(struct l2cap_conn *conn,
+				   struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				   u8 *data)
+{
+	struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data;
+	u16 scid, flags, result;
+	struct l2cap_chan *chan;
+	int len = cmd_len - sizeof(*rsp);
+	int err = 0;
+
+	if (cmd_len < sizeof(*rsp))
+		return -EPROTO;
+
+	scid   = __le16_to_cpu(rsp->scid);
+	flags  = __le16_to_cpu(rsp->flags);
+	result = __le16_to_cpu(rsp->result);
+
+	BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x len %d", scid, flags,
+	       result, len);
+
+	chan = l2cap_get_chan_by_scid(conn, scid);
+	if (!chan)
+		return 0;
+
+	switch (result) {
+	case L2CAP_CONF_SUCCESS:
+		l2cap_conf_rfc_get(chan, rsp->data, len);
+		clear_bit(CONF_REM_CONF_PEND, &chan->conf_state);
+		break;
+
+	case L2CAP_CONF_PENDING:
+		set_bit(CONF_REM_CONF_PEND, &chan->conf_state);
+
+		if (test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) {
+			char buf[64];
+
+			len = l2cap_parse_conf_rsp(chan, rsp->data, len,
+						   buf, sizeof(buf), &result);
+			if (len < 0) {
+				l2cap_send_disconn_req(chan, ECONNRESET);
+				goto done;
+			}
+
+			if (!chan->hs_hcon) {
+				l2cap_send_efs_conf_rsp(chan, buf, cmd->ident,
+							0);
+			} else {
+				if (l2cap_check_efs(chan)) {
+					amp_create_logical_link(chan);
+					chan->ident = cmd->ident;
+				}
+			}
+		}
+		goto done;
+
+	case L2CAP_CONF_UNACCEPT:
+		if (chan->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) {
+			char req[64];
+
+			if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) {
+				l2cap_send_disconn_req(chan, ECONNRESET);
+				goto done;
+			}
+
+			/* throw out any old stored conf requests */
+			result = L2CAP_CONF_SUCCESS;
+			len = l2cap_parse_conf_rsp(chan, rsp->data, len,
+						   req, sizeof(req), &result);
+			if (len < 0) {
+				l2cap_send_disconn_req(chan, ECONNRESET);
+				goto done;
+			}
+
+			l2cap_send_cmd(conn, l2cap_get_ident(conn),
+				       L2CAP_CONF_REQ, len, req);
+			chan->num_conf_req++;
+			if (result != L2CAP_CONF_SUCCESS)
+				goto done;
+			break;
+		}
+		fallthrough;
+
+	default:
+		l2cap_chan_set_err(chan, ECONNRESET);
+
+		__set_chan_timer(chan, L2CAP_DISC_REJ_TIMEOUT);
+		l2cap_send_disconn_req(chan, ECONNRESET);
+		goto done;
+	}
+
+	if (flags & L2CAP_CONF_FLAG_CONTINUATION)
+		goto done;
+
+	set_bit(CONF_INPUT_DONE, &chan->conf_state);
+
+	if (test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) {
+		set_default_fcs(chan);
+
+		if (chan->mode == L2CAP_MODE_ERTM ||
+		    chan->mode == L2CAP_MODE_STREAMING)
+			err = l2cap_ertm_init(chan);
+
+		if (err < 0)
+			l2cap_send_disconn_req(chan, -err);
+		else
+			l2cap_chan_ready(chan);
+	}
+
+done:
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+	return err;
+}
+
+static inline int l2cap_disconnect_req(struct l2cap_conn *conn,
+				       struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				       u8 *data)
+{
+	struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data;
+	struct l2cap_disconn_rsp rsp;
+	u16 dcid, scid;
+	struct l2cap_chan *chan;
+
+	if (cmd_len != sizeof(*req))
+		return -EPROTO;
+
+	scid = __le16_to_cpu(req->scid);
+	dcid = __le16_to_cpu(req->dcid);
+
+	BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid);
+
+	chan = l2cap_get_chan_by_scid(conn, dcid);
+	if (!chan) {
+		cmd_reject_invalid_cid(conn, cmd->ident, dcid, scid);
+		return 0;
+	}
+
+	rsp.dcid = cpu_to_le16(chan->scid);
+	rsp.scid = cpu_to_le16(chan->dcid);
+	l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp);
+
+	chan->ops->set_shutdown(chan);
+
+	l2cap_chan_unlock(chan);
+	mutex_lock(&conn->chan_lock);
+	l2cap_chan_lock(chan);
+	l2cap_chan_del(chan, ECONNRESET);
+	mutex_unlock(&conn->chan_lock);
+
+	chan->ops->close(chan);
+
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+
+	return 0;
+}
+
+static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn,
+				       struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				       u8 *data)
+{
+	struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data;
+	u16 dcid, scid;
+	struct l2cap_chan *chan;
+
+	if (cmd_len != sizeof(*rsp))
+		return -EPROTO;
+
+	scid = __le16_to_cpu(rsp->scid);
+	dcid = __le16_to_cpu(rsp->dcid);
+
+	BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid);
+
+	chan = l2cap_get_chan_by_scid(conn, scid);
+	if (!chan) {
+		return 0;
+	}
+
+	if (chan->state != BT_DISCONN) {
+		l2cap_chan_unlock(chan);
+		l2cap_chan_put(chan);
+		return 0;
+	}
+
+	l2cap_chan_unlock(chan);
+	mutex_lock(&conn->chan_lock);
+	l2cap_chan_lock(chan);
+	l2cap_chan_del(chan, 0);
+	mutex_unlock(&conn->chan_lock);
+
+	chan->ops->close(chan);
+
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+
+	return 0;
+}
+
+static inline int l2cap_information_req(struct l2cap_conn *conn,
+					struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+					u8 *data)
+{
+	struct l2cap_info_req *req = (struct l2cap_info_req *) data;
+	u16 type;
+
+	if (cmd_len != sizeof(*req))
+		return -EPROTO;
+
+	type = __le16_to_cpu(req->type);
+
+	BT_DBG("type 0x%4.4x", type);
+
+	if (type == L2CAP_IT_FEAT_MASK) {
+		u8 buf[8];
+		u32 feat_mask = l2cap_feat_mask;
+		struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf;
+		rsp->type   = cpu_to_le16(L2CAP_IT_FEAT_MASK);
+		rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS);
+		if (!disable_ertm)
+			feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING
+				| L2CAP_FEAT_FCS;
+		if (conn->local_fixed_chan & L2CAP_FC_A2MP)
+			feat_mask |= L2CAP_FEAT_EXT_FLOW
+				| L2CAP_FEAT_EXT_WINDOW;
+
+		put_unaligned_le32(feat_mask, rsp->data);
+		l2cap_send_cmd(conn, cmd->ident, L2CAP_INFO_RSP, sizeof(buf),
+			       buf);
+	} else if (type == L2CAP_IT_FIXED_CHAN) {
+		u8 buf[12];
+		struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf;
+
+		rsp->type   = cpu_to_le16(L2CAP_IT_FIXED_CHAN);
+		rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS);
+		rsp->data[0] = conn->local_fixed_chan;
+		memset(rsp->data + 1, 0, 7);
+		l2cap_send_cmd(conn, cmd->ident, L2CAP_INFO_RSP, sizeof(buf),
+			       buf);
+	} else {
+		struct l2cap_info_rsp rsp;
+		rsp.type   = cpu_to_le16(type);
+		rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP);
+		l2cap_send_cmd(conn, cmd->ident, L2CAP_INFO_RSP, sizeof(rsp),
+			       &rsp);
+	}
+
+	return 0;
+}
+
+static inline int l2cap_information_rsp(struct l2cap_conn *conn,
+					struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+					u8 *data)
+{
+	struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data;
+	u16 type, result;
+
+	if (cmd_len < sizeof(*rsp))
+		return -EPROTO;
+
+	type   = __le16_to_cpu(rsp->type);
+	result = __le16_to_cpu(rsp->result);
+
+	BT_DBG("type 0x%4.4x result 0x%2.2x", type, result);
+
+	/* L2CAP Info req/rsp are unbound to channels, add extra checks */
+	if (cmd->ident != conn->info_ident ||
+	    conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)
+		return 0;
+
+	cancel_delayed_work(&conn->info_timer);
+
+	if (result != L2CAP_IR_SUCCESS) {
+		conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
+		conn->info_ident = 0;
+
+		l2cap_conn_start(conn);
+
+		return 0;
+	}
+
+	switch (type) {
+	case L2CAP_IT_FEAT_MASK:
+		conn->feat_mask = get_unaligned_le32(rsp->data);
+
+		if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) {
+			struct l2cap_info_req req;
+			req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN);
+
+			conn->info_ident = l2cap_get_ident(conn);
+
+			l2cap_send_cmd(conn, conn->info_ident,
+				       L2CAP_INFO_REQ, sizeof(req), &req);
+		} else {
+			conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
+			conn->info_ident = 0;
+
+			l2cap_conn_start(conn);
+		}
+		break;
+
+	case L2CAP_IT_FIXED_CHAN:
+		conn->remote_fixed_chan = rsp->data[0];
+		conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
+		conn->info_ident = 0;
+
+		l2cap_conn_start(conn);
+		break;
+	}
+
+	return 0;
+}
+
+static int l2cap_create_channel_req(struct l2cap_conn *conn,
+				    struct l2cap_cmd_hdr *cmd,
+				    u16 cmd_len, void *data)
+{
+	struct l2cap_create_chan_req *req = data;
+	struct l2cap_create_chan_rsp rsp;
+	struct l2cap_chan *chan;
+	struct hci_dev *hdev;
+	u16 psm, scid;
+
+	if (cmd_len != sizeof(*req))
+		return -EPROTO;
+
+	if (!(conn->local_fixed_chan & L2CAP_FC_A2MP))
+		return -EINVAL;
+
+	psm = le16_to_cpu(req->psm);
+	scid = le16_to_cpu(req->scid);
+
+	BT_DBG("psm 0x%2.2x, scid 0x%4.4x, amp_id %d", psm, scid, req->amp_id);
+
+	/* For controller id 0 make BR/EDR connection */
+	if (req->amp_id == AMP_ID_BREDR) {
+		l2cap_connect(conn, cmd, data, L2CAP_CREATE_CHAN_RSP,
+			      req->amp_id);
+		return 0;
+	}
+
+	/* Validate AMP controller id */
+	hdev = hci_dev_get(req->amp_id);
+	if (!hdev)
+		goto error;
+
+	if (hdev->dev_type != HCI_AMP || !test_bit(HCI_UP, &hdev->flags)) {
+		hci_dev_put(hdev);
+		goto error;
+	}
+
+	chan = l2cap_connect(conn, cmd, data, L2CAP_CREATE_CHAN_RSP,
+			     req->amp_id);
+	if (chan) {
+		struct amp_mgr *mgr = conn->hcon->amp_mgr;
+		struct hci_conn *hs_hcon;
+
+		hs_hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK,
+						  &conn->hcon->dst);
+		if (!hs_hcon) {
+			hci_dev_put(hdev);
+			cmd_reject_invalid_cid(conn, cmd->ident, chan->scid,
+					       chan->dcid);
+			return 0;
+		}
+
+		BT_DBG("mgr %p bredr_chan %p hs_hcon %p", mgr, chan, hs_hcon);
+
+		mgr->bredr_chan = chan;
+		chan->hs_hcon = hs_hcon;
+		chan->fcs = L2CAP_FCS_NONE;
+		conn->mtu = hdev->block_mtu;
+	}
+
+	hci_dev_put(hdev);
+
+	return 0;
+
+error:
+	rsp.dcid = 0;
+	rsp.scid = cpu_to_le16(scid);
+	rsp.result = cpu_to_le16(L2CAP_CR_BAD_AMP);
+	rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
+
+	l2cap_send_cmd(conn, cmd->ident, L2CAP_CREATE_CHAN_RSP,
+		       sizeof(rsp), &rsp);
+
+	return 0;
+}
+
+static void l2cap_send_move_chan_req(struct l2cap_chan *chan, u8 dest_amp_id)
+{
+	struct l2cap_move_chan_req req;
+	u8 ident;
+
+	BT_DBG("chan %p, dest_amp_id %d", chan, dest_amp_id);
+
+	ident = l2cap_get_ident(chan->conn);
+	chan->ident = ident;
+
+	req.icid = cpu_to_le16(chan->scid);
+	req.dest_amp_id = dest_amp_id;
+
+	l2cap_send_cmd(chan->conn, ident, L2CAP_MOVE_CHAN_REQ, sizeof(req),
+		       &req);
+
+	__set_chan_timer(chan, L2CAP_MOVE_TIMEOUT);
+}
+
+static void l2cap_send_move_chan_rsp(struct l2cap_chan *chan, u16 result)
+{
+	struct l2cap_move_chan_rsp rsp;
+
+	BT_DBG("chan %p, result 0x%4.4x", chan, result);
+
+	rsp.icid = cpu_to_le16(chan->dcid);
+	rsp.result = cpu_to_le16(result);
+
+	l2cap_send_cmd(chan->conn, chan->ident, L2CAP_MOVE_CHAN_RSP,
+		       sizeof(rsp), &rsp);
+}
+
+static void l2cap_send_move_chan_cfm(struct l2cap_chan *chan, u16 result)
+{
+	struct l2cap_move_chan_cfm cfm;
+
+	BT_DBG("chan %p, result 0x%4.4x", chan, result);
+
+	chan->ident = l2cap_get_ident(chan->conn);
+
+	cfm.icid = cpu_to_le16(chan->scid);
+	cfm.result = cpu_to_le16(result);
+
+	l2cap_send_cmd(chan->conn, chan->ident, L2CAP_MOVE_CHAN_CFM,
+		       sizeof(cfm), &cfm);
+
+	__set_chan_timer(chan, L2CAP_MOVE_TIMEOUT);
+}
+
+static void l2cap_send_move_chan_cfm_icid(struct l2cap_conn *conn, u16 icid)
+{
+	struct l2cap_move_chan_cfm cfm;
+
+	BT_DBG("conn %p, icid 0x%4.4x", conn, icid);
+
+	cfm.icid = cpu_to_le16(icid);
+	cfm.result = cpu_to_le16(L2CAP_MC_UNCONFIRMED);
+
+	l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_MOVE_CHAN_CFM,
+		       sizeof(cfm), &cfm);
+}
+
+static void l2cap_send_move_chan_cfm_rsp(struct l2cap_conn *conn, u8 ident,
+					 u16 icid)
+{
+	struct l2cap_move_chan_cfm_rsp rsp;
+
+	BT_DBG("icid 0x%4.4x", icid);
+
+	rsp.icid = cpu_to_le16(icid);
+	l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_CFM_RSP, sizeof(rsp), &rsp);
+}
+
+static void __release_logical_link(struct l2cap_chan *chan)
+{
+	chan->hs_hchan = NULL;
+	chan->hs_hcon = NULL;
+
+	/* Placeholder - release the logical link */
+}
+
+static void l2cap_logical_fail(struct l2cap_chan *chan)
+{
+	/* Logical link setup failed */
+	if (chan->state != BT_CONNECTED) {
+		/* Create channel failure, disconnect */
+		l2cap_send_disconn_req(chan, ECONNRESET);
+		return;
+	}
+
+	switch (chan->move_role) {
+	case L2CAP_MOVE_ROLE_RESPONDER:
+		l2cap_move_done(chan);
+		l2cap_send_move_chan_rsp(chan, L2CAP_MR_NOT_SUPP);
+		break;
+	case L2CAP_MOVE_ROLE_INITIATOR:
+		if (chan->move_state == L2CAP_MOVE_WAIT_LOGICAL_COMP ||
+		    chan->move_state == L2CAP_MOVE_WAIT_LOGICAL_CFM) {
+			/* Remote has only sent pending or
+			 * success responses, clean up
+			 */
+			l2cap_move_done(chan);
+		}
+
+		/* Other amp move states imply that the move
+		 * has already aborted
+		 */
+		l2cap_send_move_chan_cfm(chan, L2CAP_MC_UNCONFIRMED);
+		break;
+	}
+}
+
+static void l2cap_logical_finish_create(struct l2cap_chan *chan,
+					struct hci_chan *hchan)
+{
+	struct l2cap_conf_rsp rsp;
+
+	chan->hs_hchan = hchan;
+	chan->hs_hcon->l2cap_data = chan->conn;
+
+	l2cap_send_efs_conf_rsp(chan, &rsp, chan->ident, 0);
+
+	if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) {
+		int err;
+
+		set_default_fcs(chan);
+
+		err = l2cap_ertm_init(chan);
+		if (err < 0)
+			l2cap_send_disconn_req(chan, -err);
+		else
+			l2cap_chan_ready(chan);
+	}
+}
+
+static void l2cap_logical_finish_move(struct l2cap_chan *chan,
+				      struct hci_chan *hchan)
+{
+	chan->hs_hcon = hchan->conn;
+	chan->hs_hcon->l2cap_data = chan->conn;
+
+	BT_DBG("move_state %d", chan->move_state);
+
+	switch (chan->move_state) {
+	case L2CAP_MOVE_WAIT_LOGICAL_COMP:
+		/* Move confirm will be sent after a success
+		 * response is received
+		 */
+		chan->move_state = L2CAP_MOVE_WAIT_RSP_SUCCESS;
+		break;
+	case L2CAP_MOVE_WAIT_LOGICAL_CFM:
+		if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) {
+			chan->move_state = L2CAP_MOVE_WAIT_LOCAL_BUSY;
+		} else if (chan->move_role == L2CAP_MOVE_ROLE_INITIATOR) {
+			chan->move_state = L2CAP_MOVE_WAIT_CONFIRM_RSP;
+			l2cap_send_move_chan_cfm(chan, L2CAP_MC_CONFIRMED);
+		} else if (chan->move_role == L2CAP_MOVE_ROLE_RESPONDER) {
+			chan->move_state = L2CAP_MOVE_WAIT_CONFIRM;
+			l2cap_send_move_chan_rsp(chan, L2CAP_MR_SUCCESS);
+		}
+		break;
+	default:
+		/* Move was not in expected state, free the channel */
+		__release_logical_link(chan);
+
+		chan->move_state = L2CAP_MOVE_STABLE;
+	}
+}
+
+/* Call with chan locked */
+void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
+		       u8 status)
+{
+	BT_DBG("chan %p, hchan %p, status %d", chan, hchan, status);
+
+	if (status) {
+		l2cap_logical_fail(chan);
+		__release_logical_link(chan);
+		return;
+	}
+
+	if (chan->state != BT_CONNECTED) {
+		/* Ignore logical link if channel is on BR/EDR */
+		if (chan->local_amp_id != AMP_ID_BREDR)
+			l2cap_logical_finish_create(chan, hchan);
+	} else {
+		l2cap_logical_finish_move(chan, hchan);
+	}
+}
+
+void l2cap_move_start(struct l2cap_chan *chan)
+{
+	BT_DBG("chan %p", chan);
+
+	if (chan->local_amp_id == AMP_ID_BREDR) {
+		if (chan->chan_policy != BT_CHANNEL_POLICY_AMP_PREFERRED)
+			return;
+		chan->move_role = L2CAP_MOVE_ROLE_INITIATOR;
+		chan->move_state = L2CAP_MOVE_WAIT_PREPARE;
+		/* Placeholder - start physical link setup */
+	} else {
+		chan->move_role = L2CAP_MOVE_ROLE_INITIATOR;
+		chan->move_state = L2CAP_MOVE_WAIT_RSP_SUCCESS;
+		chan->move_id = 0;
+		l2cap_move_setup(chan);
+		l2cap_send_move_chan_req(chan, 0);
+	}
+}
+
+static void l2cap_do_create(struct l2cap_chan *chan, int result,
+			    u8 local_amp_id, u8 remote_amp_id)
+{
+	BT_DBG("chan %p state %s %u -> %u", chan, state_to_string(chan->state),
+	       local_amp_id, remote_amp_id);
+
+	chan->fcs = L2CAP_FCS_NONE;
+
+	/* Outgoing channel on AMP */
+	if (chan->state == BT_CONNECT) {
+		if (result == L2CAP_CR_SUCCESS) {
+			chan->local_amp_id = local_amp_id;
+			l2cap_send_create_chan_req(chan, remote_amp_id);
+		} else {
+			/* Revert to BR/EDR connect */
+			l2cap_send_conn_req(chan);
+		}
+
+		return;
+	}
+
+	/* Incoming channel on AMP */
+	if (__l2cap_no_conn_pending(chan)) {
+		struct l2cap_conn_rsp rsp;
+		char buf[128];
+		rsp.scid = cpu_to_le16(chan->dcid);
+		rsp.dcid = cpu_to_le16(chan->scid);
+
+		if (result == L2CAP_CR_SUCCESS) {
+			/* Send successful response */
+			rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS);
+			rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
+		} else {
+			/* Send negative response */
+			rsp.result = cpu_to_le16(L2CAP_CR_NO_MEM);
+			rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
+		}
+
+		l2cap_send_cmd(chan->conn, chan->ident, L2CAP_CREATE_CHAN_RSP,
+			       sizeof(rsp), &rsp);
+
+		if (result == L2CAP_CR_SUCCESS) {
+			l2cap_state_change(chan, BT_CONFIG);
+			set_bit(CONF_REQ_SENT, &chan->conf_state);
+			l2cap_send_cmd(chan->conn, l2cap_get_ident(chan->conn),
+				       L2CAP_CONF_REQ,
+				       l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
+			chan->num_conf_req++;
+		}
+	}
+}
+
+static void l2cap_do_move_initiate(struct l2cap_chan *chan, u8 local_amp_id,
+				   u8 remote_amp_id)
+{
+	l2cap_move_setup(chan);
+	chan->move_id = local_amp_id;
+	chan->move_state = L2CAP_MOVE_WAIT_RSP;
+
+	l2cap_send_move_chan_req(chan, remote_amp_id);
+}
+
+static void l2cap_do_move_respond(struct l2cap_chan *chan, int result)
+{
+	struct hci_chan *hchan = NULL;
+
+	/* Placeholder - get hci_chan for logical link */
+
+	if (hchan) {
+		if (hchan->state == BT_CONNECTED) {
+			/* Logical link is ready to go */
+			chan->hs_hcon = hchan->conn;
+			chan->hs_hcon->l2cap_data = chan->conn;
+			chan->move_state = L2CAP_MOVE_WAIT_CONFIRM;
+			l2cap_send_move_chan_rsp(chan, L2CAP_MR_SUCCESS);
+
+			l2cap_logical_cfm(chan, hchan, L2CAP_MR_SUCCESS);
+		} else {
+			/* Wait for logical link to be ready */
+			chan->move_state = L2CAP_MOVE_WAIT_LOGICAL_CFM;
+		}
+	} else {
+		/* Logical link not available */
+		l2cap_send_move_chan_rsp(chan, L2CAP_MR_NOT_ALLOWED);
+	}
+}
+
+static void l2cap_do_move_cancel(struct l2cap_chan *chan, int result)
+{
+	if (chan->move_role == L2CAP_MOVE_ROLE_RESPONDER) {
+		u8 rsp_result;
+		if (result == -EINVAL)
+			rsp_result = L2CAP_MR_BAD_ID;
+		else
+			rsp_result = L2CAP_MR_NOT_ALLOWED;
+
+		l2cap_send_move_chan_rsp(chan, rsp_result);
+	}
+
+	chan->move_role = L2CAP_MOVE_ROLE_NONE;
+	chan->move_state = L2CAP_MOVE_STABLE;
+
+	/* Restart data transmission */
+	l2cap_ertm_send(chan);
+}
+
+/* Invoke with locked chan */
+void __l2cap_physical_cfm(struct l2cap_chan *chan, int result)
+{
+	u8 local_amp_id = chan->local_amp_id;
+	u8 remote_amp_id = chan->remote_amp_id;
+
+	BT_DBG("chan %p, result %d, local_amp_id %d, remote_amp_id %d",
+	       chan, result, local_amp_id, remote_amp_id);
+
+	if (chan->state == BT_DISCONN || chan->state == BT_CLOSED)
+		return;
+
+	if (chan->state != BT_CONNECTED) {
+		l2cap_do_create(chan, result, local_amp_id, remote_amp_id);
+	} else if (result != L2CAP_MR_SUCCESS) {
+		l2cap_do_move_cancel(chan, result);
+	} else {
+		switch (chan->move_role) {
+		case L2CAP_MOVE_ROLE_INITIATOR:
+			l2cap_do_move_initiate(chan, local_amp_id,
+					       remote_amp_id);
+			break;
+		case L2CAP_MOVE_ROLE_RESPONDER:
+			l2cap_do_move_respond(chan, result);
+			break;
+		default:
+			l2cap_do_move_cancel(chan, result);
+			break;
+		}
+	}
+}
+
+static inline int l2cap_move_channel_req(struct l2cap_conn *conn,
+					 struct l2cap_cmd_hdr *cmd,
+					 u16 cmd_len, void *data)
+{
+	struct l2cap_move_chan_req *req = data;
+	struct l2cap_move_chan_rsp rsp;
+	struct l2cap_chan *chan;
+	u16 icid = 0;
+	u16 result = L2CAP_MR_NOT_ALLOWED;
+
+	if (cmd_len != sizeof(*req))
+		return -EPROTO;
+
+	icid = le16_to_cpu(req->icid);
+
+	BT_DBG("icid 0x%4.4x, dest_amp_id %d", icid, req->dest_amp_id);
+
+	if (!(conn->local_fixed_chan & L2CAP_FC_A2MP))
+		return -EINVAL;
+
+	chan = l2cap_get_chan_by_dcid(conn, icid);
+	if (!chan) {
+		rsp.icid = cpu_to_le16(icid);
+		rsp.result = cpu_to_le16(L2CAP_MR_NOT_ALLOWED);
+		l2cap_send_cmd(conn, cmd->ident, L2CAP_MOVE_CHAN_RSP,
+			       sizeof(rsp), &rsp);
+		return 0;
+	}
+
+	chan->ident = cmd->ident;
+
+	if (chan->scid < L2CAP_CID_DYN_START ||
+	    chan->chan_policy == BT_CHANNEL_POLICY_BREDR_ONLY ||
+	    (chan->mode != L2CAP_MODE_ERTM &&
+	     chan->mode != L2CAP_MODE_STREAMING)) {
+		result = L2CAP_MR_NOT_ALLOWED;
+		goto send_move_response;
+	}
+
+	if (chan->local_amp_id == req->dest_amp_id) {
+		result = L2CAP_MR_SAME_ID;
+		goto send_move_response;
+	}
+
+	if (req->dest_amp_id != AMP_ID_BREDR) {
+		struct hci_dev *hdev;
+		hdev = hci_dev_get(req->dest_amp_id);
+		if (!hdev || hdev->dev_type != HCI_AMP ||
+		    !test_bit(HCI_UP, &hdev->flags)) {
+			if (hdev)
+				hci_dev_put(hdev);
+
+			result = L2CAP_MR_BAD_ID;
+			goto send_move_response;
+		}
+		hci_dev_put(hdev);
+	}
+
+	/* Detect a move collision.  Only send a collision response
+	 * if this side has "lost", otherwise proceed with the move.
+	 * The winner has the larger bd_addr.
+	 */
+	if ((__chan_is_moving(chan) ||
+	     chan->move_role != L2CAP_MOVE_ROLE_NONE) &&
+	    bacmp(&conn->hcon->src, &conn->hcon->dst) > 0) {
+		result = L2CAP_MR_COLLISION;
+		goto send_move_response;
+	}
+
+	chan->move_role = L2CAP_MOVE_ROLE_RESPONDER;
+	l2cap_move_setup(chan);
+	chan->move_id = req->dest_amp_id;
+
+	if (req->dest_amp_id == AMP_ID_BREDR) {
+		/* Moving to BR/EDR */
+		if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) {
+			chan->move_state = L2CAP_MOVE_WAIT_LOCAL_BUSY;
+			result = L2CAP_MR_PEND;
+		} else {
+			chan->move_state = L2CAP_MOVE_WAIT_CONFIRM;
+			result = L2CAP_MR_SUCCESS;
+		}
+	} else {
+		chan->move_state = L2CAP_MOVE_WAIT_PREPARE;
+		/* Placeholder - uncomment when amp functions are available */
+		/*amp_accept_physical(chan, req->dest_amp_id);*/
+		result = L2CAP_MR_PEND;
+	}
+
+send_move_response:
+	l2cap_send_move_chan_rsp(chan, result);
+
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+
+	return 0;
+}
+
+static void l2cap_move_continue(struct l2cap_conn *conn, u16 icid, u16 result)
+{
+	struct l2cap_chan *chan;
+	struct hci_chan *hchan = NULL;
+
+	chan = l2cap_get_chan_by_scid(conn, icid);
+	if (!chan) {
+		l2cap_send_move_chan_cfm_icid(conn, icid);
+		return;
+	}
+
+	__clear_chan_timer(chan);
+	if (result == L2CAP_MR_PEND)
+		__set_chan_timer(chan, L2CAP_MOVE_ERTX_TIMEOUT);
+
+	switch (chan->move_state) {
+	case L2CAP_MOVE_WAIT_LOGICAL_COMP:
+		/* Move confirm will be sent when logical link
+		 * is complete.
+		 */
+		chan->move_state = L2CAP_MOVE_WAIT_LOGICAL_CFM;
+		break;
+	case L2CAP_MOVE_WAIT_RSP_SUCCESS:
+		if (result == L2CAP_MR_PEND) {
+			break;
+		} else if (test_bit(CONN_LOCAL_BUSY,
+				    &chan->conn_state)) {
+			chan->move_state = L2CAP_MOVE_WAIT_LOCAL_BUSY;
+		} else {
+			/* Logical link is up or moving to BR/EDR,
+			 * proceed with move
+			 */
+			chan->move_state = L2CAP_MOVE_WAIT_CONFIRM_RSP;
+			l2cap_send_move_chan_cfm(chan, L2CAP_MC_CONFIRMED);
+		}
+		break;
+	case L2CAP_MOVE_WAIT_RSP:
+		/* Moving to AMP */
+		if (result == L2CAP_MR_SUCCESS) {
+			/* Remote is ready, send confirm immediately
+			 * after logical link is ready
+			 */
+			chan->move_state = L2CAP_MOVE_WAIT_LOGICAL_CFM;
+		} else {
+			/* Both logical link and move success
+			 * are required to confirm
+			 */
+			chan->move_state = L2CAP_MOVE_WAIT_LOGICAL_COMP;
+		}
+
+		/* Placeholder - get hci_chan for logical link */
+		if (!hchan) {
+			/* Logical link not available */
+			l2cap_send_move_chan_cfm(chan, L2CAP_MC_UNCONFIRMED);
+			break;
+		}
+
+		/* If the logical link is not yet connected, do not
+		 * send confirmation.
+		 */
+		if (hchan->state != BT_CONNECTED)
+			break;
+
+		/* Logical link is already ready to go */
+
+		chan->hs_hcon = hchan->conn;
+		chan->hs_hcon->l2cap_data = chan->conn;
+
+		if (result == L2CAP_MR_SUCCESS) {
+			/* Can confirm now */
+			l2cap_send_move_chan_cfm(chan, L2CAP_MC_CONFIRMED);
+		} else {
+			/* Now only need move success
+			 * to confirm
+			 */
+			chan->move_state = L2CAP_MOVE_WAIT_RSP_SUCCESS;
+		}
+
+		l2cap_logical_cfm(chan, hchan, L2CAP_MR_SUCCESS);
+		break;
+	default:
+		/* Any other amp move state means the move failed. */
+		chan->move_id = chan->local_amp_id;
+		l2cap_move_done(chan);
+		l2cap_send_move_chan_cfm(chan, L2CAP_MC_UNCONFIRMED);
+	}
+
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+}
+
+static void l2cap_move_fail(struct l2cap_conn *conn, u8 ident, u16 icid,
+			    u16 result)
+{
+	struct l2cap_chan *chan;
+
+	chan = l2cap_get_chan_by_ident(conn, ident);
+	if (!chan) {
+		/* Could not locate channel, icid is best guess */
+		l2cap_send_move_chan_cfm_icid(conn, icid);
+		return;
+	}
+
+	__clear_chan_timer(chan);
+
+	if (chan->move_role == L2CAP_MOVE_ROLE_INITIATOR) {
+		if (result == L2CAP_MR_COLLISION) {
+			chan->move_role = L2CAP_MOVE_ROLE_RESPONDER;
+		} else {
+			/* Cleanup - cancel move */
+			chan->move_id = chan->local_amp_id;
+			l2cap_move_done(chan);
+		}
+	}
+
+	l2cap_send_move_chan_cfm(chan, L2CAP_MC_UNCONFIRMED);
+
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+}
+
+static int l2cap_move_channel_rsp(struct l2cap_conn *conn,
+				  struct l2cap_cmd_hdr *cmd,
+				  u16 cmd_len, void *data)
+{
+	struct l2cap_move_chan_rsp *rsp = data;
+	u16 icid, result;
+
+	if (cmd_len != sizeof(*rsp))
+		return -EPROTO;
+
+	icid = le16_to_cpu(rsp->icid);
+	result = le16_to_cpu(rsp->result);
+
+	BT_DBG("icid 0x%4.4x, result 0x%4.4x", icid, result);
+
+	if (result == L2CAP_MR_SUCCESS || result == L2CAP_MR_PEND)
+		l2cap_move_continue(conn, icid, result);
+	else
+		l2cap_move_fail(conn, cmd->ident, icid, result);
+
+	return 0;
+}
+
+static int l2cap_move_channel_confirm(struct l2cap_conn *conn,
+				      struct l2cap_cmd_hdr *cmd,
+				      u16 cmd_len, void *data)
+{
+	struct l2cap_move_chan_cfm *cfm = data;
+	struct l2cap_chan *chan;
+	u16 icid, result;
+
+	if (cmd_len != sizeof(*cfm))
+		return -EPROTO;
+
+	icid = le16_to_cpu(cfm->icid);
+	result = le16_to_cpu(cfm->result);
+
+	BT_DBG("icid 0x%4.4x, result 0x%4.4x", icid, result);
+
+	chan = l2cap_get_chan_by_dcid(conn, icid);
+	if (!chan) {
+		/* Spec requires a response even if the icid was not found */
+		l2cap_send_move_chan_cfm_rsp(conn, cmd->ident, icid);
+		return 0;
+	}
+
+	if (chan->move_state == L2CAP_MOVE_WAIT_CONFIRM) {
+		if (result == L2CAP_MC_CONFIRMED) {
+			chan->local_amp_id = chan->move_id;
+			if (chan->local_amp_id == AMP_ID_BREDR)
+				__release_logical_link(chan);
+		} else {
+			chan->move_id = chan->local_amp_id;
+		}
+
+		l2cap_move_done(chan);
+	}
+
+	l2cap_send_move_chan_cfm_rsp(conn, cmd->ident, icid);
+
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+
+	return 0;
+}
+
+static inline int l2cap_move_channel_confirm_rsp(struct l2cap_conn *conn,
+						 struct l2cap_cmd_hdr *cmd,
+						 u16 cmd_len, void *data)
+{
+	struct l2cap_move_chan_cfm_rsp *rsp = data;
+	struct l2cap_chan *chan;
+	u16 icid;
+
+	if (cmd_len != sizeof(*rsp))
+		return -EPROTO;
+
+	icid = le16_to_cpu(rsp->icid);
+
+	BT_DBG("icid 0x%4.4x", icid);
+
+	chan = l2cap_get_chan_by_scid(conn, icid);
+	if (!chan)
+		return 0;
+
+	__clear_chan_timer(chan);
+
+	if (chan->move_state == L2CAP_MOVE_WAIT_CONFIRM_RSP) {
+		chan->local_amp_id = chan->move_id;
+
+		if (chan->local_amp_id == AMP_ID_BREDR && chan->hs_hchan)
+			__release_logical_link(chan);
+
+		l2cap_move_done(chan);
+	}
+
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+
+	return 0;
+}
+
+static inline int l2cap_conn_param_update_req(struct l2cap_conn *conn,
+					      struct l2cap_cmd_hdr *cmd,
+					      u16 cmd_len, u8 *data)
+{
+	struct hci_conn *hcon = conn->hcon;
+	struct l2cap_conn_param_update_req *req;
+	struct l2cap_conn_param_update_rsp rsp;
+	u16 min, max, latency, to_multiplier;
+	int err;
+
+	if (hcon->role != HCI_ROLE_MASTER)
+		return -EINVAL;
+
+	if (cmd_len != sizeof(struct l2cap_conn_param_update_req))
+		return -EPROTO;
+
+	req = (struct l2cap_conn_param_update_req *) data;
+	min		= __le16_to_cpu(req->min);
+	max		= __le16_to_cpu(req->max);
+	latency		= __le16_to_cpu(req->latency);
+	to_multiplier	= __le16_to_cpu(req->to_multiplier);
+
+	BT_DBG("min 0x%4.4x max 0x%4.4x latency: 0x%4.4x Timeout: 0x%4.4x",
+	       min, max, latency, to_multiplier);
+
+	memset(&rsp, 0, sizeof(rsp));
+
+	err = hci_check_conn_params(min, max, latency, to_multiplier);
+	if (err)
+		rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_REJECTED);
+	else
+		rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_ACCEPTED);
+
+	l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_PARAM_UPDATE_RSP,
+		       sizeof(rsp), &rsp);
+
+	if (!err) {
+		u8 store_hint;
+
+		store_hint = hci_le_conn_update(hcon, min, max, latency,
+						to_multiplier);
+		mgmt_new_conn_param(hcon->hdev, &hcon->dst, hcon->dst_type,
+				    store_hint, min, max, latency,
+				    to_multiplier);
+
+	}
+
+	return 0;
+}
+
+static int l2cap_le_connect_rsp(struct l2cap_conn *conn,
+				struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				u8 *data)
+{
+	struct l2cap_le_conn_rsp *rsp = (struct l2cap_le_conn_rsp *) data;
+	struct hci_conn *hcon = conn->hcon;
+	u16 dcid, mtu, mps, credits, result;
+	struct l2cap_chan *chan;
+	int err, sec_level;
+
+	if (cmd_len < sizeof(*rsp))
+		return -EPROTO;
+
+	dcid    = __le16_to_cpu(rsp->dcid);
+	mtu     = __le16_to_cpu(rsp->mtu);
+	mps     = __le16_to_cpu(rsp->mps);
+	credits = __le16_to_cpu(rsp->credits);
+	result  = __le16_to_cpu(rsp->result);
+
+	if (result == L2CAP_CR_LE_SUCCESS && (mtu < 23 || mps < 23 ||
+					   dcid < L2CAP_CID_DYN_START ||
+					   dcid > L2CAP_CID_LE_DYN_END))
+		return -EPROTO;
+
+	BT_DBG("dcid 0x%4.4x mtu %u mps %u credits %u result 0x%2.2x",
+	       dcid, mtu, mps, credits, result);
+
+	mutex_lock(&conn->chan_lock);
+
+	chan = __l2cap_get_chan_by_ident(conn, cmd->ident);
+	if (!chan) {
+		err = -EBADSLT;
+		goto unlock;
+	}
+
+	err = 0;
+
+	l2cap_chan_lock(chan);
+
+	switch (result) {
+	case L2CAP_CR_LE_SUCCESS:
+		if (__l2cap_get_chan_by_dcid(conn, dcid)) {
+			err = -EBADSLT;
+			break;
+		}
+
+		chan->ident = 0;
+		chan->dcid = dcid;
+		chan->omtu = mtu;
+		chan->remote_mps = mps;
+		chan->tx_credits = credits;
+		l2cap_chan_ready(chan);
+		break;
+
+	case L2CAP_CR_LE_AUTHENTICATION:
+	case L2CAP_CR_LE_ENCRYPTION:
+		/* If we already have MITM protection we can't do
+		 * anything.
+		 */
+		if (hcon->sec_level > BT_SECURITY_MEDIUM) {
+			l2cap_chan_del(chan, ECONNREFUSED);
+			break;
+		}
+
+		sec_level = hcon->sec_level + 1;
+		if (chan->sec_level < sec_level)
+			chan->sec_level = sec_level;
+
+		/* We'll need to send a new Connect Request */
+		clear_bit(FLAG_LE_CONN_REQ_SENT, &chan->flags);
+
+		smp_conn_security(hcon, chan->sec_level);
+		break;
+
+	default:
+		l2cap_chan_del(chan, ECONNREFUSED);
+		break;
+	}
+
+	l2cap_chan_unlock(chan);
+
+unlock:
+	mutex_unlock(&conn->chan_lock);
+
+	return err;
+}
+
+static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn,
+				      struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				      u8 *data)
+{
+	int err = 0;
+
+	switch (cmd->code) {
+	case L2CAP_COMMAND_REJ:
+		l2cap_command_rej(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_CONN_REQ:
+		err = l2cap_connect_req(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_CONN_RSP:
+	case L2CAP_CREATE_CHAN_RSP:
+		l2cap_connect_create_rsp(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_CONF_REQ:
+		err = l2cap_config_req(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_CONF_RSP:
+		l2cap_config_rsp(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_DISCONN_REQ:
+		err = l2cap_disconnect_req(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_DISCONN_RSP:
+		l2cap_disconnect_rsp(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_ECHO_REQ:
+		l2cap_send_cmd(conn, cmd->ident, L2CAP_ECHO_RSP, cmd_len, data);
+		break;
+
+	case L2CAP_ECHO_RSP:
+		break;
+
+	case L2CAP_INFO_REQ:
+		err = l2cap_information_req(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_INFO_RSP:
+		l2cap_information_rsp(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_CREATE_CHAN_REQ:
+		err = l2cap_create_channel_req(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_MOVE_CHAN_REQ:
+		err = l2cap_move_channel_req(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_MOVE_CHAN_RSP:
+		l2cap_move_channel_rsp(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_MOVE_CHAN_CFM:
+		err = l2cap_move_channel_confirm(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_MOVE_CHAN_CFM_RSP:
+		l2cap_move_channel_confirm_rsp(conn, cmd, cmd_len, data);
+		break;
+
+	default:
+		BT_ERR("Unknown BR/EDR signaling command 0x%2.2x", cmd->code);
+		err = -EINVAL;
+		break;
+	}
+
+	return err;
+}
+
+static int l2cap_le_connect_req(struct l2cap_conn *conn,
+				struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				u8 *data)
+{
+	struct l2cap_le_conn_req *req = (struct l2cap_le_conn_req *) data;
+	struct l2cap_le_conn_rsp rsp;
+	struct l2cap_chan *chan, *pchan;
+	u16 dcid, scid, credits, mtu, mps;
+	__le16 psm;
+	u8 result;
+
+	if (cmd_len != sizeof(*req))
+		return -EPROTO;
+
+	scid = __le16_to_cpu(req->scid);
+	mtu  = __le16_to_cpu(req->mtu);
+	mps  = __le16_to_cpu(req->mps);
+	psm  = req->psm;
+	dcid = 0;
+	credits = 0;
+
+	if (mtu < 23 || mps < 23)
+		return -EPROTO;
+
+	BT_DBG("psm 0x%2.2x scid 0x%4.4x mtu %u mps %u", __le16_to_cpu(psm),
+	       scid, mtu, mps);
+
+	/* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 3, Part A
+	 * page 1059:
+	 *
+	 * Valid range: 0x0001-0x00ff
+	 *
+	 * Table 4.15: L2CAP_LE_CREDIT_BASED_CONNECTION_REQ SPSM ranges
+	 */
+	if (!psm || __le16_to_cpu(psm) > L2CAP_PSM_LE_DYN_END) {
+		result = L2CAP_CR_LE_BAD_PSM;
+		chan = NULL;
+		goto response;
+	}
+
+	/* Check if we have socket listening on psm */
+	pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, &conn->hcon->src,
+					 &conn->hcon->dst, LE_LINK);
+	if (!pchan) {
+		result = L2CAP_CR_LE_BAD_PSM;
+		chan = NULL;
+		goto response;
+	}
+
+	mutex_lock(&conn->chan_lock);
+	l2cap_chan_lock(pchan);
+
+	if (!smp_sufficient_security(conn->hcon, pchan->sec_level,
+				     SMP_ALLOW_STK)) {
+		result = L2CAP_CR_LE_AUTHENTICATION;
+		chan = NULL;
+		goto response_unlock;
+	}
+
+	/* Check for valid dynamic CID range */
+	if (scid < L2CAP_CID_DYN_START || scid > L2CAP_CID_LE_DYN_END) {
+		result = L2CAP_CR_LE_INVALID_SCID;
+		chan = NULL;
+		goto response_unlock;
+	}
+
+	/* Check if we already have channel with that dcid */
+	if (__l2cap_get_chan_by_dcid(conn, scid)) {
+		result = L2CAP_CR_LE_SCID_IN_USE;
+		chan = NULL;
+		goto response_unlock;
+	}
+
+	chan = pchan->ops->new_connection(pchan);
+	if (!chan) {
+		result = L2CAP_CR_LE_NO_MEM;
+		goto response_unlock;
+	}
+
+	bacpy(&chan->src, &conn->hcon->src);
+	bacpy(&chan->dst, &conn->hcon->dst);
+	chan->src_type = bdaddr_src_type(conn->hcon);
+	chan->dst_type = bdaddr_dst_type(conn->hcon);
+	chan->psm  = psm;
+	chan->dcid = scid;
+	chan->omtu = mtu;
+	chan->remote_mps = mps;
+
+	__l2cap_chan_add(conn, chan);
+
+	l2cap_le_flowctl_init(chan, __le16_to_cpu(req->credits));
+
+	dcid = chan->scid;
+	credits = chan->rx_credits;
+
+	__set_chan_timer(chan, chan->ops->get_sndtimeo(chan));
+
+	chan->ident = cmd->ident;
+
+	if (test_bit(FLAG_DEFER_SETUP, &chan->flags)) {
+		l2cap_state_change(chan, BT_CONNECT2);
+		/* The following result value is actually not defined
+		 * for LE CoC but we use it to let the function know
+		 * that it should bail out after doing its cleanup
+		 * instead of sending a response.
+		 */
+		result = L2CAP_CR_PEND;
+		chan->ops->defer(chan);
+	} else {
+		l2cap_chan_ready(chan);
+		result = L2CAP_CR_LE_SUCCESS;
+	}
+
+response_unlock:
+	l2cap_chan_unlock(pchan);
+	mutex_unlock(&conn->chan_lock);
+	l2cap_chan_put(pchan);
+
+	if (result == L2CAP_CR_PEND)
+		return 0;
+
+response:
+	if (chan) {
+		rsp.mtu = cpu_to_le16(chan->imtu);
+		rsp.mps = cpu_to_le16(chan->mps);
+	} else {
+		rsp.mtu = 0;
+		rsp.mps = 0;
+	}
+
+	rsp.dcid    = cpu_to_le16(dcid);
+	rsp.credits = cpu_to_le16(credits);
+	rsp.result  = cpu_to_le16(result);
+
+	l2cap_send_cmd(conn, cmd->ident, L2CAP_LE_CONN_RSP, sizeof(rsp), &rsp);
+
+	return 0;
+}
+
+static inline int l2cap_le_credits(struct l2cap_conn *conn,
+				   struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				   u8 *data)
+{
+	struct l2cap_le_credits *pkt;
+	struct l2cap_chan *chan;
+	u16 cid, credits, max_credits;
+
+	if (cmd_len != sizeof(*pkt))
+		return -EPROTO;
+
+	pkt = (struct l2cap_le_credits *) data;
+	cid	= __le16_to_cpu(pkt->cid);
+	credits	= __le16_to_cpu(pkt->credits);
+
+	BT_DBG("cid 0x%4.4x credits 0x%4.4x", cid, credits);
+
+	chan = l2cap_get_chan_by_dcid(conn, cid);
+	if (!chan)
+		return -EBADSLT;
+
+	max_credits = LE_FLOWCTL_MAX_CREDITS - chan->tx_credits;
+	if (credits > max_credits) {
+		BT_ERR("LE credits overflow");
+		l2cap_send_disconn_req(chan, ECONNRESET);
+
+		/* Return 0 so that we don't trigger an unnecessary
+		 * command reject packet.
+		 */
+		goto unlock;
+	}
+
+	chan->tx_credits += credits;
+
+	/* Resume sending */
+	l2cap_le_flowctl_send(chan);
+
+	if (chan->tx_credits)
+		chan->ops->resume(chan);
+
+unlock:
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+
+	return 0;
+}
+
+static inline int l2cap_ecred_conn_req(struct l2cap_conn *conn,
+				       struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				       u8 *data)
+{
+	struct l2cap_ecred_conn_req *req = (void *) data;
+	struct {
+		struct l2cap_ecred_conn_rsp rsp;
+		__le16 dcid[L2CAP_ECRED_MAX_CID];
+	} __packed pdu;
+	struct l2cap_chan *chan, *pchan;
+	u16 mtu, mps;
+	__le16 psm;
+	u8 result, len = 0;
+	int i, num_scid;
+	bool defer = false;
+
+	if (!enable_ecred)
+		return -EINVAL;
+
+	if (cmd_len < sizeof(*req) || (cmd_len - sizeof(*req)) % sizeof(u16)) {
+		result = L2CAP_CR_LE_INVALID_PARAMS;
+		goto response;
+	}
+
+	cmd_len -= sizeof(*req);
+	num_scid = cmd_len / sizeof(u16);
+
+	if (num_scid > ARRAY_SIZE(pdu.dcid)) {
+		result = L2CAP_CR_LE_INVALID_PARAMS;
+		goto response;
+	}
+
+	mtu  = __le16_to_cpu(req->mtu);
+	mps  = __le16_to_cpu(req->mps);
+
+	if (mtu < L2CAP_ECRED_MIN_MTU || mps < L2CAP_ECRED_MIN_MPS) {
+		result = L2CAP_CR_LE_UNACCEPT_PARAMS;
+		goto response;
+	}
+
+	psm  = req->psm;
+
+	/* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 3, Part A
+	 * page 1059:
+	 *
+	 * Valid range: 0x0001-0x00ff
+	 *
+	 * Table 4.15: L2CAP_LE_CREDIT_BASED_CONNECTION_REQ SPSM ranges
+	 */
+	if (!psm || __le16_to_cpu(psm) > L2CAP_PSM_LE_DYN_END) {
+		result = L2CAP_CR_LE_BAD_PSM;
+		goto response;
+	}
+
+	BT_DBG("psm 0x%2.2x mtu %u mps %u", __le16_to_cpu(psm), mtu, mps);
+
+	memset(&pdu, 0, sizeof(pdu));
+
+	/* Check if we have socket listening on psm */
+	pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, &conn->hcon->src,
+					 &conn->hcon->dst, LE_LINK);
+	if (!pchan) {
+		result = L2CAP_CR_LE_BAD_PSM;
+		goto response;
+	}
+
+	mutex_lock(&conn->chan_lock);
+	l2cap_chan_lock(pchan);
+
+	if (!smp_sufficient_security(conn->hcon, pchan->sec_level,
+				     SMP_ALLOW_STK)) {
+		result = L2CAP_CR_LE_AUTHENTICATION;
+		goto unlock;
+	}
+
+	result = L2CAP_CR_LE_SUCCESS;
+
+	for (i = 0; i < num_scid; i++) {
+		u16 scid = __le16_to_cpu(req->scid[i]);
+
+		BT_DBG("scid[%d] 0x%4.4x", i, scid);
+
+		pdu.dcid[i] = 0x0000;
+		len += sizeof(*pdu.dcid);
+
+		/* Check for valid dynamic CID range */
+		if (scid < L2CAP_CID_DYN_START || scid > L2CAP_CID_LE_DYN_END) {
+			result = L2CAP_CR_LE_INVALID_SCID;
+			continue;
+		}
+
+		/* Check if we already have channel with that dcid */
+		if (__l2cap_get_chan_by_dcid(conn, scid)) {
+			result = L2CAP_CR_LE_SCID_IN_USE;
+			continue;
+		}
+
+		chan = pchan->ops->new_connection(pchan);
+		if (!chan) {
+			result = L2CAP_CR_LE_NO_MEM;
+			continue;
+		}
+
+		bacpy(&chan->src, &conn->hcon->src);
+		bacpy(&chan->dst, &conn->hcon->dst);
+		chan->src_type = bdaddr_src_type(conn->hcon);
+		chan->dst_type = bdaddr_dst_type(conn->hcon);
+		chan->psm  = psm;
+		chan->dcid = scid;
+		chan->omtu = mtu;
+		chan->remote_mps = mps;
+
+		__l2cap_chan_add(conn, chan);
+
+		l2cap_ecred_init(chan, __le16_to_cpu(req->credits));
+
+		/* Init response */
+		if (!pdu.rsp.credits) {
+			pdu.rsp.mtu = cpu_to_le16(chan->imtu);
+			pdu.rsp.mps = cpu_to_le16(chan->mps);
+			pdu.rsp.credits = cpu_to_le16(chan->rx_credits);
+		}
+
+		pdu.dcid[i] = cpu_to_le16(chan->scid);
+
+		__set_chan_timer(chan, chan->ops->get_sndtimeo(chan));
+
+		chan->ident = cmd->ident;
+		chan->mode = L2CAP_MODE_EXT_FLOWCTL;
+
+		if (test_bit(FLAG_DEFER_SETUP, &chan->flags)) {
+			l2cap_state_change(chan, BT_CONNECT2);
+			defer = true;
+			chan->ops->defer(chan);
+		} else {
+			l2cap_chan_ready(chan);
+		}
+	}
+
+unlock:
+	l2cap_chan_unlock(pchan);
+	mutex_unlock(&conn->chan_lock);
+	l2cap_chan_put(pchan);
+
+response:
+	pdu.rsp.result = cpu_to_le16(result);
+
+	if (defer)
+		return 0;
+
+	l2cap_send_cmd(conn, cmd->ident, L2CAP_ECRED_CONN_RSP,
+		       sizeof(pdu.rsp) + len, &pdu);
+
+	return 0;
+}
+
+static inline int l2cap_ecred_conn_rsp(struct l2cap_conn *conn,
+				       struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				       u8 *data)
+{
+	struct l2cap_ecred_conn_rsp *rsp = (void *) data;
+	struct hci_conn *hcon = conn->hcon;
+	u16 mtu, mps, credits, result;
+	struct l2cap_chan *chan, *tmp;
+	int err = 0, sec_level;
+	int i = 0;
+
+	if (cmd_len < sizeof(*rsp))
+		return -EPROTO;
+
+	mtu     = __le16_to_cpu(rsp->mtu);
+	mps     = __le16_to_cpu(rsp->mps);
+	credits = __le16_to_cpu(rsp->credits);
+	result  = __le16_to_cpu(rsp->result);
+
+	BT_DBG("mtu %u mps %u credits %u result 0x%4.4x", mtu, mps, credits,
+	       result);
+
+	mutex_lock(&conn->chan_lock);
+
+	cmd_len -= sizeof(*rsp);
+
+	list_for_each_entry_safe(chan, tmp, &conn->chan_l, list) {
+		u16 dcid;
+
+		if (chan->ident != cmd->ident ||
+		    chan->mode != L2CAP_MODE_EXT_FLOWCTL ||
+		    chan->state == BT_CONNECTED)
+			continue;
+
+		l2cap_chan_lock(chan);
+
+		/* Check that there is a dcid for each pending channel */
+		if (cmd_len < sizeof(dcid)) {
+			l2cap_chan_del(chan, ECONNREFUSED);
+			l2cap_chan_unlock(chan);
+			continue;
+		}
+
+		dcid = __le16_to_cpu(rsp->dcid[i++]);
+		cmd_len -= sizeof(u16);
+
+		BT_DBG("dcid[%d] 0x%4.4x", i, dcid);
+
+		/* Check if dcid is already in use */
+		if (dcid && __l2cap_get_chan_by_dcid(conn, dcid)) {
+			/* If a device receives a
+			 * L2CAP_CREDIT_BASED_CONNECTION_RSP packet with an
+			 * already-assigned Destination CID, then both the
+			 * original channel and the new channel shall be
+			 * immediately discarded and not used.
+			 */
+			l2cap_chan_del(chan, ECONNREFUSED);
+			l2cap_chan_unlock(chan);
+			chan = __l2cap_get_chan_by_dcid(conn, dcid);
+			l2cap_chan_lock(chan);
+			l2cap_chan_del(chan, ECONNRESET);
+			l2cap_chan_unlock(chan);
+			continue;
+		}
+
+		switch (result) {
+		case L2CAP_CR_LE_AUTHENTICATION:
+		case L2CAP_CR_LE_ENCRYPTION:
+			/* If we already have MITM protection we can't do
+			 * anything.
+			 */
+			if (hcon->sec_level > BT_SECURITY_MEDIUM) {
+				l2cap_chan_del(chan, ECONNREFUSED);
+				break;
+			}
+
+			sec_level = hcon->sec_level + 1;
+			if (chan->sec_level < sec_level)
+				chan->sec_level = sec_level;
+
+			/* We'll need to send a new Connect Request */
+			clear_bit(FLAG_ECRED_CONN_REQ_SENT, &chan->flags);
+
+			smp_conn_security(hcon, chan->sec_level);
+			break;
+
+		case L2CAP_CR_LE_BAD_PSM:
+			l2cap_chan_del(chan, ECONNREFUSED);
+			break;
+
+		default:
+			/* If dcid was not set it means channels was refused */
+			if (!dcid) {
+				l2cap_chan_del(chan, ECONNREFUSED);
+				break;
+			}
+
+			chan->ident = 0;
+			chan->dcid = dcid;
+			chan->omtu = mtu;
+			chan->remote_mps = mps;
+			chan->tx_credits = credits;
+			l2cap_chan_ready(chan);
+			break;
+		}
+
+		l2cap_chan_unlock(chan);
+	}
+
+	mutex_unlock(&conn->chan_lock);
+
+	return err;
+}
+
+static inline int l2cap_ecred_reconf_req(struct l2cap_conn *conn,
+					 struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+					 u8 *data)
+{
+	struct l2cap_ecred_reconf_req *req = (void *) data;
+	struct l2cap_ecred_reconf_rsp rsp;
+	u16 mtu, mps, result;
+	struct l2cap_chan *chan;
+	int i, num_scid;
+
+	if (!enable_ecred)
+		return -EINVAL;
+
+	if (cmd_len < sizeof(*req) || cmd_len - sizeof(*req) % sizeof(u16)) {
+		result = L2CAP_CR_LE_INVALID_PARAMS;
+		goto respond;
+	}
+
+	mtu = __le16_to_cpu(req->mtu);
+	mps = __le16_to_cpu(req->mps);
+
+	BT_DBG("mtu %u mps %u", mtu, mps);
+
+	if (mtu < L2CAP_ECRED_MIN_MTU) {
+		result = L2CAP_RECONF_INVALID_MTU;
+		goto respond;
+	}
+
+	if (mps < L2CAP_ECRED_MIN_MPS) {
+		result = L2CAP_RECONF_INVALID_MPS;
+		goto respond;
+	}
+
+	cmd_len -= sizeof(*req);
+	num_scid = cmd_len / sizeof(u16);
+	result = L2CAP_RECONF_SUCCESS;
+
+	for (i = 0; i < num_scid; i++) {
+		u16 scid;
+
+		scid = __le16_to_cpu(req->scid[i]);
+		if (!scid)
+			return -EPROTO;
+
+		chan = __l2cap_get_chan_by_dcid(conn, scid);
+		if (!chan)
+			continue;
+
+		/* If the MTU value is decreased for any of the included
+		 * channels, then the receiver shall disconnect all
+		 * included channels.
+		 */
+		if (chan->omtu > mtu) {
+			BT_ERR("chan %p decreased MTU %u -> %u", chan,
+			       chan->omtu, mtu);
+			result = L2CAP_RECONF_INVALID_MTU;
+		}
+
+		chan->omtu = mtu;
+		chan->remote_mps = mps;
+	}
+
+respond:
+	rsp.result = cpu_to_le16(result);
+
+	l2cap_send_cmd(conn, cmd->ident, L2CAP_ECRED_RECONF_RSP, sizeof(rsp),
+		       &rsp);
+
+	return 0;
+}
+
+static inline int l2cap_ecred_reconf_rsp(struct l2cap_conn *conn,
+					 struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+					 u8 *data)
+{
+	struct l2cap_chan *chan, *tmp;
+	struct l2cap_ecred_conn_rsp *rsp = (void *) data;
+	u16 result;
+
+	if (cmd_len < sizeof(*rsp))
+		return -EPROTO;
+
+	result = __le16_to_cpu(rsp->result);
+
+	BT_DBG("result 0x%4.4x", rsp->result);
+
+	if (!result)
+		return 0;
+
+	list_for_each_entry_safe(chan, tmp, &conn->chan_l, list) {
+		if (chan->ident != cmd->ident)
+			continue;
+
+		l2cap_chan_del(chan, ECONNRESET);
+	}
+
+	return 0;
+}
+
+static inline int l2cap_le_command_rej(struct l2cap_conn *conn,
+				       struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				       u8 *data)
+{
+	struct l2cap_cmd_rej_unk *rej = (struct l2cap_cmd_rej_unk *) data;
+	struct l2cap_chan *chan;
+
+	if (cmd_len < sizeof(*rej))
+		return -EPROTO;
+
+	mutex_lock(&conn->chan_lock);
+
+	chan = __l2cap_get_chan_by_ident(conn, cmd->ident);
+	if (!chan)
+		goto done;
+
+	chan = l2cap_chan_hold_unless_zero(chan);
+	if (!chan)
+		goto done;
+
+	l2cap_chan_lock(chan);
+	l2cap_chan_del(chan, ECONNREFUSED);
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+
+done:
+	mutex_unlock(&conn->chan_lock);
+	return 0;
+}
+
+static inline int l2cap_le_sig_cmd(struct l2cap_conn *conn,
+				   struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+				   u8 *data)
+{
+	int err = 0;
+
+	switch (cmd->code) {
+	case L2CAP_COMMAND_REJ:
+		l2cap_le_command_rej(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_CONN_PARAM_UPDATE_REQ:
+		err = l2cap_conn_param_update_req(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_CONN_PARAM_UPDATE_RSP:
+		break;
+
+	case L2CAP_LE_CONN_RSP:
+		l2cap_le_connect_rsp(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_LE_CONN_REQ:
+		err = l2cap_le_connect_req(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_LE_CREDITS:
+		err = l2cap_le_credits(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_ECRED_CONN_REQ:
+		err = l2cap_ecred_conn_req(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_ECRED_CONN_RSP:
+		err = l2cap_ecred_conn_rsp(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_ECRED_RECONF_REQ:
+		err = l2cap_ecred_reconf_req(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_ECRED_RECONF_RSP:
+		err = l2cap_ecred_reconf_rsp(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_DISCONN_REQ:
+		err = l2cap_disconnect_req(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_DISCONN_RSP:
+		l2cap_disconnect_rsp(conn, cmd, cmd_len, data);
+		break;
+
+	default:
+		BT_ERR("Unknown LE signaling command 0x%2.2x", cmd->code);
+		err = -EINVAL;
+		break;
+	}
+
+	return err;
+}
+
+static inline void l2cap_le_sig_channel(struct l2cap_conn *conn,
+					struct sk_buff *skb)
+{
+	struct hci_conn *hcon = conn->hcon;
+	struct l2cap_cmd_hdr *cmd;
+	u16 len;
+	int err;
+
+	if (hcon->type != LE_LINK)
+		goto drop;
+
+	if (skb->len < L2CAP_CMD_HDR_SIZE)
+		goto drop;
+
+	cmd = (void *) skb->data;
+	skb_pull(skb, L2CAP_CMD_HDR_SIZE);
+
+	len = le16_to_cpu(cmd->len);
+
+	BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd->code, len, cmd->ident);
+
+	if (len != skb->len || !cmd->ident) {
+		BT_DBG("corrupted command");
+		goto drop;
+	}
+
+	err = l2cap_le_sig_cmd(conn, cmd, len, skb->data);
+	if (err) {
+		struct l2cap_cmd_rej_unk rej;
+
+		BT_ERR("Wrong link type (%d)", err);
+
+		rej.reason = cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD);
+		l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ,
+			       sizeof(rej), &rej);
+	}
+
+drop:
+	kfree_skb(skb);
+}
+
+static inline void l2cap_sig_send_rej(struct l2cap_conn *conn, u16 ident)
+{
+	struct l2cap_cmd_rej_unk rej;
+
+	rej.reason = cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD);
+	l2cap_send_cmd(conn, ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej);
+}
+
+static inline void l2cap_sig_channel(struct l2cap_conn *conn,
+				     struct sk_buff *skb)
+{
+	struct hci_conn *hcon = conn->hcon;
+	struct l2cap_cmd_hdr *cmd;
+	int err;
+
+	l2cap_raw_recv(conn, skb);
+
+	if (hcon->type != ACL_LINK)
+		goto drop;
+
+	while (skb->len >= L2CAP_CMD_HDR_SIZE) {
+		u16 len;
+
+		cmd = (void *) skb->data;
+		skb_pull(skb, L2CAP_CMD_HDR_SIZE);
+
+		len = le16_to_cpu(cmd->len);
+
+		BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd->code, len,
+		       cmd->ident);
+
+		if (len > skb->len || !cmd->ident) {
+			BT_DBG("corrupted command");
+			l2cap_sig_send_rej(conn, cmd->ident);
+			break;
+		}
+
+		err = l2cap_bredr_sig_cmd(conn, cmd, len, skb->data);
+		if (err) {
+			BT_ERR("Wrong link type (%d)", err);
+			l2cap_sig_send_rej(conn, cmd->ident);
+		}
+
+		skb_pull(skb, len);
+	}
+
+	if (skb->len > 0) {
+		BT_DBG("corrupted command");
+		l2cap_sig_send_rej(conn, 0);
+	}
+
+drop:
+	kfree_skb(skb);
+}
+
+static int l2cap_check_fcs(struct l2cap_chan *chan,  struct sk_buff *skb)
+{
+	u16 our_fcs, rcv_fcs;
+	int hdr_size;
+
+	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
+		hdr_size = L2CAP_EXT_HDR_SIZE;
+	else
+		hdr_size = L2CAP_ENH_HDR_SIZE;
+
+	if (chan->fcs == L2CAP_FCS_CRC16) {
+		skb_trim(skb, skb->len - L2CAP_FCS_SIZE);
+		rcv_fcs = get_unaligned_le16(skb->data + skb->len);
+		our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size);
+
+		if (our_fcs != rcv_fcs)
+			return -EBADMSG;
+	}
+	return 0;
+}
+
+static void l2cap_send_i_or_rr_or_rnr(struct l2cap_chan *chan)
+{
+	struct l2cap_ctrl control;
+
+	BT_DBG("chan %p", chan);
+
+	memset(&control, 0, sizeof(control));
+	control.sframe = 1;
+	control.final = 1;
+	control.reqseq = chan->buffer_seq;
+	set_bit(CONN_SEND_FBIT, &chan->conn_state);
+
+	if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) {
+		control.super = L2CAP_SUPER_RNR;
+		l2cap_send_sframe(chan, &control);
+	}
+
+	if (test_and_clear_bit(CONN_REMOTE_BUSY, &chan->conn_state) &&
+	    chan->unacked_frames > 0)
+		__set_retrans_timer(chan);
+
+	/* Send pending iframes */
+	l2cap_ertm_send(chan);
+
+	if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state) &&
+	    test_bit(CONN_SEND_FBIT, &chan->conn_state)) {
+		/* F-bit wasn't sent in an s-frame or i-frame yet, so
+		 * send it now.
+		 */
+		control.super = L2CAP_SUPER_RR;
+		l2cap_send_sframe(chan, &control);
+	}
+}
+
+static void append_skb_frag(struct sk_buff *skb, struct sk_buff *new_frag,
+			    struct sk_buff **last_frag)
+{
+	/* skb->len reflects data in skb as well as all fragments
+	 * skb->data_len reflects only data in fragments
+	 */
+	if (!skb_has_frag_list(skb))
+		skb_shinfo(skb)->frag_list = new_frag;
+
+	new_frag->next = NULL;
+
+	(*last_frag)->next = new_frag;
+	*last_frag = new_frag;
+
+	skb->len += new_frag->len;
+	skb->data_len += new_frag->len;
+	skb->truesize += new_frag->truesize;
+}
+
+static int l2cap_reassemble_sdu(struct l2cap_chan *chan, struct sk_buff *skb,
+				struct l2cap_ctrl *control)
+{
+	int err = -EINVAL;
+
+	switch (control->sar) {
+	case L2CAP_SAR_UNSEGMENTED:
+		if (chan->sdu)
+			break;
+
+		err = chan->ops->recv(chan, skb);
+		break;
+
+	case L2CAP_SAR_START:
+		if (chan->sdu)
+			break;
+
+		if (!pskb_may_pull(skb, L2CAP_SDULEN_SIZE))
+			break;
+
+		chan->sdu_len = get_unaligned_le16(skb->data);
+		skb_pull(skb, L2CAP_SDULEN_SIZE);
+
+		if (chan->sdu_len > chan->imtu) {
+			err = -EMSGSIZE;
+			break;
+		}
+
+		if (skb->len >= chan->sdu_len)
+			break;
+
+		chan->sdu = skb;
+		chan->sdu_last_frag = skb;
+
+		skb = NULL;
+		err = 0;
+		break;
+
+	case L2CAP_SAR_CONTINUE:
+		if (!chan->sdu)
+			break;
+
+		append_skb_frag(chan->sdu, skb,
+				&chan->sdu_last_frag);
+		skb = NULL;
+
+		if (chan->sdu->len >= chan->sdu_len)
+			break;
+
+		err = 0;
+		break;
+
+	case L2CAP_SAR_END:
+		if (!chan->sdu)
+			break;
+
+		append_skb_frag(chan->sdu, skb,
+				&chan->sdu_last_frag);
+		skb = NULL;
+
+		if (chan->sdu->len != chan->sdu_len)
+			break;
+
+		err = chan->ops->recv(chan, chan->sdu);
+
+		if (!err) {
+			/* Reassembly complete */
+			chan->sdu = NULL;
+			chan->sdu_last_frag = NULL;
+			chan->sdu_len = 0;
+		}
+		break;
+	}
+
+	if (err) {
+		kfree_skb(skb);
+		kfree_skb(chan->sdu);
+		chan->sdu = NULL;
+		chan->sdu_last_frag = NULL;
+		chan->sdu_len = 0;
+	}
+
+	return err;
+}
+
+static int l2cap_resegment(struct l2cap_chan *chan)
+{
+	/* Placeholder */
+	return 0;
+}
+
+void l2cap_chan_busy(struct l2cap_chan *chan, int busy)
+{
+	u8 event;
+
+	if (chan->mode != L2CAP_MODE_ERTM)
+		return;
+
+	event = busy ? L2CAP_EV_LOCAL_BUSY_DETECTED : L2CAP_EV_LOCAL_BUSY_CLEAR;
+	l2cap_tx(chan, NULL, NULL, event);
+}
+
+static int l2cap_rx_queued_iframes(struct l2cap_chan *chan)
+{
+	int err = 0;
+	/* Pass sequential frames to l2cap_reassemble_sdu()
+	 * until a gap is encountered.
+	 */
+
+	BT_DBG("chan %p", chan);
+
+	while (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) {
+		struct sk_buff *skb;
+		BT_DBG("Searching for skb with txseq %d (queue len %d)",
+		       chan->buffer_seq, skb_queue_len(&chan->srej_q));
+
+		skb = l2cap_ertm_seq_in_queue(&chan->srej_q, chan->buffer_seq);
+
+		if (!skb)
+			break;
+
+		skb_unlink(skb, &chan->srej_q);
+		chan->buffer_seq = __next_seq(chan, chan->buffer_seq);
+		err = l2cap_reassemble_sdu(chan, skb, &bt_cb(skb)->l2cap);
+		if (err)
+			break;
+	}
+
+	if (skb_queue_empty(&chan->srej_q)) {
+		chan->rx_state = L2CAP_RX_STATE_RECV;
+		l2cap_send_ack(chan);
+	}
+
+	return err;
+}
+
+static void l2cap_handle_srej(struct l2cap_chan *chan,
+			      struct l2cap_ctrl *control)
+{
+	struct sk_buff *skb;
+
+	BT_DBG("chan %p, control %p", chan, control);
+
+	if (control->reqseq == chan->next_tx_seq) {
+		BT_DBG("Invalid reqseq %d, disconnecting", control->reqseq);
+		l2cap_send_disconn_req(chan, ECONNRESET);
+		return;
+	}
+
+	skb = l2cap_ertm_seq_in_queue(&chan->tx_q, control->reqseq);
+
+	if (skb == NULL) {
+		BT_DBG("Seq %d not available for retransmission",
+		       control->reqseq);
+		return;
+	}
+
+	if (chan->max_tx != 0 && bt_cb(skb)->l2cap.retries >= chan->max_tx) {
+		BT_DBG("Retry limit exceeded (%d)", chan->max_tx);
+		l2cap_send_disconn_req(chan, ECONNRESET);
+		return;
+	}
+
+	clear_bit(CONN_REMOTE_BUSY, &chan->conn_state);
+
+	if (control->poll) {
+		l2cap_pass_to_tx(chan, control);
+
+		set_bit(CONN_SEND_FBIT, &chan->conn_state);
+		l2cap_retransmit(chan, control);
+		l2cap_ertm_send(chan);
+
+		if (chan->tx_state == L2CAP_TX_STATE_WAIT_F) {
+			set_bit(CONN_SREJ_ACT, &chan->conn_state);
+			chan->srej_save_reqseq = control->reqseq;
+		}
+	} else {
+		l2cap_pass_to_tx_fbit(chan, control);
+
+		if (control->final) {
+			if (chan->srej_save_reqseq != control->reqseq ||
+			    !test_and_clear_bit(CONN_SREJ_ACT,
+						&chan->conn_state))
+				l2cap_retransmit(chan, control);
+		} else {
+			l2cap_retransmit(chan, control);
+			if (chan->tx_state == L2CAP_TX_STATE_WAIT_F) {
+				set_bit(CONN_SREJ_ACT, &chan->conn_state);
+				chan->srej_save_reqseq = control->reqseq;
+			}
+		}
+	}
+}
+
+static void l2cap_handle_rej(struct l2cap_chan *chan,
+			     struct l2cap_ctrl *control)
+{
+	struct sk_buff *skb;
+
+	BT_DBG("chan %p, control %p", chan, control);
+
+	if (control->reqseq == chan->next_tx_seq) {
+		BT_DBG("Invalid reqseq %d, disconnecting", control->reqseq);
+		l2cap_send_disconn_req(chan, ECONNRESET);
+		return;
+	}
+
+	skb = l2cap_ertm_seq_in_queue(&chan->tx_q, control->reqseq);
+
+	if (chan->max_tx && skb &&
+	    bt_cb(skb)->l2cap.retries >= chan->max_tx) {
+		BT_DBG("Retry limit exceeded (%d)", chan->max_tx);
+		l2cap_send_disconn_req(chan, ECONNRESET);
+		return;
+	}
+
+	clear_bit(CONN_REMOTE_BUSY, &chan->conn_state);
+
+	l2cap_pass_to_tx(chan, control);
+
+	if (control->final) {
+		if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state))
+			l2cap_retransmit_all(chan, control);
+	} else {
+		l2cap_retransmit_all(chan, control);
+		l2cap_ertm_send(chan);
+		if (chan->tx_state == L2CAP_TX_STATE_WAIT_F)
+			set_bit(CONN_REJ_ACT, &chan->conn_state);
+	}
+}
+
+static u8 l2cap_classify_txseq(struct l2cap_chan *chan, u16 txseq)
+{
+	BT_DBG("chan %p, txseq %d", chan, txseq);
+
+	BT_DBG("last_acked_seq %d, expected_tx_seq %d", chan->last_acked_seq,
+	       chan->expected_tx_seq);
+
+	if (chan->rx_state == L2CAP_RX_STATE_SREJ_SENT) {
+		if (__seq_offset(chan, txseq, chan->last_acked_seq) >=
+		    chan->tx_win) {
+			/* See notes below regarding "double poll" and
+			 * invalid packets.
+			 */
+			if (chan->tx_win <= ((chan->tx_win_max + 1) >> 1)) {
+				BT_DBG("Invalid/Ignore - after SREJ");
+				return L2CAP_TXSEQ_INVALID_IGNORE;
+			} else {
+				BT_DBG("Invalid - in window after SREJ sent");
+				return L2CAP_TXSEQ_INVALID;
+			}
+		}
+
+		if (chan->srej_list.head == txseq) {
+			BT_DBG("Expected SREJ");
+			return L2CAP_TXSEQ_EXPECTED_SREJ;
+		}
+
+		if (l2cap_ertm_seq_in_queue(&chan->srej_q, txseq)) {
+			BT_DBG("Duplicate SREJ - txseq already stored");
+			return L2CAP_TXSEQ_DUPLICATE_SREJ;
+		}
+
+		if (l2cap_seq_list_contains(&chan->srej_list, txseq)) {
+			BT_DBG("Unexpected SREJ - not requested");
+			return L2CAP_TXSEQ_UNEXPECTED_SREJ;
+		}
+	}
+
+	if (chan->expected_tx_seq == txseq) {
+		if (__seq_offset(chan, txseq, chan->last_acked_seq) >=
+		    chan->tx_win) {
+			BT_DBG("Invalid - txseq outside tx window");
+			return L2CAP_TXSEQ_INVALID;
+		} else {
+			BT_DBG("Expected");
+			return L2CAP_TXSEQ_EXPECTED;
+		}
+	}
+
+	if (__seq_offset(chan, txseq, chan->last_acked_seq) <
+	    __seq_offset(chan, chan->expected_tx_seq, chan->last_acked_seq)) {
+		BT_DBG("Duplicate - expected_tx_seq later than txseq");
+		return L2CAP_TXSEQ_DUPLICATE;
+	}
+
+	if (__seq_offset(chan, txseq, chan->last_acked_seq) >= chan->tx_win) {
+		/* A source of invalid packets is a "double poll" condition,
+		 * where delays cause us to send multiple poll packets.  If
+		 * the remote stack receives and processes both polls,
+		 * sequence numbers can wrap around in such a way that a
+		 * resent frame has a sequence number that looks like new data
+		 * with a sequence gap.  This would trigger an erroneous SREJ
+		 * request.
+		 *
+		 * Fortunately, this is impossible with a tx window that's
+		 * less than half of the maximum sequence number, which allows
+		 * invalid frames to be safely ignored.
+		 *
+		 * With tx window sizes greater than half of the tx window
+		 * maximum, the frame is invalid and cannot be ignored.  This
+		 * causes a disconnect.
+		 */
+
+		if (chan->tx_win <= ((chan->tx_win_max + 1) >> 1)) {
+			BT_DBG("Invalid/Ignore - txseq outside tx window");
+			return L2CAP_TXSEQ_INVALID_IGNORE;
+		} else {
+			BT_DBG("Invalid - txseq outside tx window");
+			return L2CAP_TXSEQ_INVALID;
+		}
+	} else {
+		BT_DBG("Unexpected - txseq indicates missing frames");
+		return L2CAP_TXSEQ_UNEXPECTED;
+	}
+}
+
+static int l2cap_rx_state_recv(struct l2cap_chan *chan,
+			       struct l2cap_ctrl *control,
+			       struct sk_buff *skb, u8 event)
+{
+	struct l2cap_ctrl local_control;
+	int err = 0;
+	bool skb_in_use = false;
+
+	BT_DBG("chan %p, control %p, skb %p, event %d", chan, control, skb,
+	       event);
+
+	switch (event) {
+	case L2CAP_EV_RECV_IFRAME:
+		switch (l2cap_classify_txseq(chan, control->txseq)) {
+		case L2CAP_TXSEQ_EXPECTED:
+			l2cap_pass_to_tx(chan, control);
+
+			if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) {
+				BT_DBG("Busy, discarding expected seq %d",
+				       control->txseq);
+				break;
+			}
+
+			chan->expected_tx_seq = __next_seq(chan,
+							   control->txseq);
+
+			chan->buffer_seq = chan->expected_tx_seq;
+			skb_in_use = true;
+
+			/* l2cap_reassemble_sdu may free skb, hence invalidate
+			 * control, so make a copy in advance to use it after
+			 * l2cap_reassemble_sdu returns and to avoid the race
+			 * condition, for example:
+			 *
+			 * The current thread calls:
+			 *   l2cap_reassemble_sdu
+			 *     chan->ops->recv == l2cap_sock_recv_cb
+			 *       __sock_queue_rcv_skb
+			 * Another thread calls:
+			 *   bt_sock_recvmsg
+			 *     skb_recv_datagram
+			 *     skb_free_datagram
+			 * Then the current thread tries to access control, but
+			 * it was freed by skb_free_datagram.
+			 */
+			local_control = *control;
+			err = l2cap_reassemble_sdu(chan, skb, control);
+			if (err)
+				break;
+
+			if (local_control.final) {
+				if (!test_and_clear_bit(CONN_REJ_ACT,
+							&chan->conn_state)) {
+					local_control.final = 0;
+					l2cap_retransmit_all(chan, &local_control);
+					l2cap_ertm_send(chan);
+				}
+			}
+
+			if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state))
+				l2cap_send_ack(chan);
+			break;
+		case L2CAP_TXSEQ_UNEXPECTED:
+			l2cap_pass_to_tx(chan, control);
+
+			/* Can't issue SREJ frames in the local busy state.
+			 * Drop this frame, it will be seen as missing
+			 * when local busy is exited.
+			 */
+			if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) {
+				BT_DBG("Busy, discarding unexpected seq %d",
+				       control->txseq);
+				break;
+			}
+
+			/* There was a gap in the sequence, so an SREJ
+			 * must be sent for each missing frame.  The
+			 * current frame is stored for later use.
+			 */
+			skb_queue_tail(&chan->srej_q, skb);
+			skb_in_use = true;
+			BT_DBG("Queued %p (queue len %d)", skb,
+			       skb_queue_len(&chan->srej_q));
+
+			clear_bit(CONN_SREJ_ACT, &chan->conn_state);
+			l2cap_seq_list_clear(&chan->srej_list);
+			l2cap_send_srej(chan, control->txseq);
+
+			chan->rx_state = L2CAP_RX_STATE_SREJ_SENT;
+			break;
+		case L2CAP_TXSEQ_DUPLICATE:
+			l2cap_pass_to_tx(chan, control);
+			break;
+		case L2CAP_TXSEQ_INVALID_IGNORE:
+			break;
+		case L2CAP_TXSEQ_INVALID:
+		default:
+			l2cap_send_disconn_req(chan, ECONNRESET);
+			break;
+		}
+		break;
+	case L2CAP_EV_RECV_RR:
+		l2cap_pass_to_tx(chan, control);
+		if (control->final) {
+			clear_bit(CONN_REMOTE_BUSY, &chan->conn_state);
+
+			if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state) &&
+			    !__chan_is_moving(chan)) {
+				control->final = 0;
+				l2cap_retransmit_all(chan, control);
+			}
+
+			l2cap_ertm_send(chan);
+		} else if (control->poll) {
+			l2cap_send_i_or_rr_or_rnr(chan);
+		} else {
+			if (test_and_clear_bit(CONN_REMOTE_BUSY,
+					       &chan->conn_state) &&
+			    chan->unacked_frames)
+				__set_retrans_timer(chan);
+
+			l2cap_ertm_send(chan);
+		}
+		break;
+	case L2CAP_EV_RECV_RNR:
+		set_bit(CONN_REMOTE_BUSY, &chan->conn_state);
+		l2cap_pass_to_tx(chan, control);
+		if (control && control->poll) {
+			set_bit(CONN_SEND_FBIT, &chan->conn_state);
+			l2cap_send_rr_or_rnr(chan, 0);
+		}
+		__clear_retrans_timer(chan);
+		l2cap_seq_list_clear(&chan->retrans_list);
+		break;
+	case L2CAP_EV_RECV_REJ:
+		l2cap_handle_rej(chan, control);
+		break;
+	case L2CAP_EV_RECV_SREJ:
+		l2cap_handle_srej(chan, control);
+		break;
+	default:
+		break;
+	}
+
+	if (skb && !skb_in_use) {
+		BT_DBG("Freeing %p", skb);
+		kfree_skb(skb);
+	}
+
+	return err;
+}
+
+static int l2cap_rx_state_srej_sent(struct l2cap_chan *chan,
+				    struct l2cap_ctrl *control,
+				    struct sk_buff *skb, u8 event)
+{
+	int err = 0;
+	u16 txseq = control->txseq;
+	bool skb_in_use = false;
+
+	BT_DBG("chan %p, control %p, skb %p, event %d", chan, control, skb,
+	       event);
+
+	switch (event) {
+	case L2CAP_EV_RECV_IFRAME:
+		switch (l2cap_classify_txseq(chan, txseq)) {
+		case L2CAP_TXSEQ_EXPECTED:
+			/* Keep frame for reassembly later */
+			l2cap_pass_to_tx(chan, control);
+			skb_queue_tail(&chan->srej_q, skb);
+			skb_in_use = true;
+			BT_DBG("Queued %p (queue len %d)", skb,
+			       skb_queue_len(&chan->srej_q));
+
+			chan->expected_tx_seq = __next_seq(chan, txseq);
+			break;
+		case L2CAP_TXSEQ_EXPECTED_SREJ:
+			l2cap_seq_list_pop(&chan->srej_list);
+
+			l2cap_pass_to_tx(chan, control);
+			skb_queue_tail(&chan->srej_q, skb);
+			skb_in_use = true;
+			BT_DBG("Queued %p (queue len %d)", skb,
+			       skb_queue_len(&chan->srej_q));
+
+			err = l2cap_rx_queued_iframes(chan);
+			if (err)
+				break;
+
+			break;
+		case L2CAP_TXSEQ_UNEXPECTED:
+			/* Got a frame that can't be reassembled yet.
+			 * Save it for later, and send SREJs to cover
+			 * the missing frames.
+			 */
+			skb_queue_tail(&chan->srej_q, skb);
+			skb_in_use = true;
+			BT_DBG("Queued %p (queue len %d)", skb,
+			       skb_queue_len(&chan->srej_q));
+
+			l2cap_pass_to_tx(chan, control);
+			l2cap_send_srej(chan, control->txseq);
+			break;
+		case L2CAP_TXSEQ_UNEXPECTED_SREJ:
+			/* This frame was requested with an SREJ, but
+			 * some expected retransmitted frames are
+			 * missing.  Request retransmission of missing
+			 * SREJ'd frames.
+			 */
+			skb_queue_tail(&chan->srej_q, skb);
+			skb_in_use = true;
+			BT_DBG("Queued %p (queue len %d)", skb,
+			       skb_queue_len(&chan->srej_q));
+
+			l2cap_pass_to_tx(chan, control);
+			l2cap_send_srej_list(chan, control->txseq);
+			break;
+		case L2CAP_TXSEQ_DUPLICATE_SREJ:
+			/* We've already queued this frame.  Drop this copy. */
+			l2cap_pass_to_tx(chan, control);
+			break;
+		case L2CAP_TXSEQ_DUPLICATE:
+			/* Expecting a later sequence number, so this frame
+			 * was already received.  Ignore it completely.
+			 */
+			break;
+		case L2CAP_TXSEQ_INVALID_IGNORE:
+			break;
+		case L2CAP_TXSEQ_INVALID:
+		default:
+			l2cap_send_disconn_req(chan, ECONNRESET);
+			break;
+		}
+		break;
+	case L2CAP_EV_RECV_RR:
+		l2cap_pass_to_tx(chan, control);
+		if (control->final) {
+			clear_bit(CONN_REMOTE_BUSY, &chan->conn_state);
+
+			if (!test_and_clear_bit(CONN_REJ_ACT,
+						&chan->conn_state)) {
+				control->final = 0;
+				l2cap_retransmit_all(chan, control);
+			}
+
+			l2cap_ertm_send(chan);
+		} else if (control->poll) {
+			if (test_and_clear_bit(CONN_REMOTE_BUSY,
+					       &chan->conn_state) &&
+			    chan->unacked_frames) {
+				__set_retrans_timer(chan);
+			}
+
+			set_bit(CONN_SEND_FBIT, &chan->conn_state);
+			l2cap_send_srej_tail(chan);
+		} else {
+			if (test_and_clear_bit(CONN_REMOTE_BUSY,
+					       &chan->conn_state) &&
+			    chan->unacked_frames)
+				__set_retrans_timer(chan);
+
+			l2cap_send_ack(chan);
+		}
+		break;
+	case L2CAP_EV_RECV_RNR:
+		set_bit(CONN_REMOTE_BUSY, &chan->conn_state);
+		l2cap_pass_to_tx(chan, control);
+		if (control->poll) {
+			l2cap_send_srej_tail(chan);
+		} else {
+			struct l2cap_ctrl rr_control;
+			memset(&rr_control, 0, sizeof(rr_control));
+			rr_control.sframe = 1;
+			rr_control.super = L2CAP_SUPER_RR;
+			rr_control.reqseq = chan->buffer_seq;
+			l2cap_send_sframe(chan, &rr_control);
+		}
+
+		break;
+	case L2CAP_EV_RECV_REJ:
+		l2cap_handle_rej(chan, control);
+		break;
+	case L2CAP_EV_RECV_SREJ:
+		l2cap_handle_srej(chan, control);
+		break;
+	}
+
+	if (skb && !skb_in_use) {
+		BT_DBG("Freeing %p", skb);
+		kfree_skb(skb);
+	}
+
+	return err;
+}
+
+static int l2cap_finish_move(struct l2cap_chan *chan)
+{
+	BT_DBG("chan %p", chan);
+
+	chan->rx_state = L2CAP_RX_STATE_RECV;
+
+	if (chan->hs_hcon)
+		chan->conn->mtu = chan->hs_hcon->hdev->block_mtu;
+	else
+		chan->conn->mtu = chan->conn->hcon->hdev->acl_mtu;
+
+	return l2cap_resegment(chan);
+}
+
+static int l2cap_rx_state_wait_p(struct l2cap_chan *chan,
+				 struct l2cap_ctrl *control,
+				 struct sk_buff *skb, u8 event)
+{
+	int err;
+
+	BT_DBG("chan %p, control %p, skb %p, event %d", chan, control, skb,
+	       event);
+
+	if (!control->poll)
+		return -EPROTO;
+
+	l2cap_process_reqseq(chan, control->reqseq);
+
+	if (!skb_queue_empty(&chan->tx_q))
+		chan->tx_send_head = skb_peek(&chan->tx_q);
+	else
+		chan->tx_send_head = NULL;
+
+	/* Rewind next_tx_seq to the point expected
+	 * by the receiver.
+	 */
+	chan->next_tx_seq = control->reqseq;
+	chan->unacked_frames = 0;
+
+	err = l2cap_finish_move(chan);
+	if (err)
+		return err;
+
+	set_bit(CONN_SEND_FBIT, &chan->conn_state);
+	l2cap_send_i_or_rr_or_rnr(chan);
+
+	if (event == L2CAP_EV_RECV_IFRAME)
+		return -EPROTO;
+
+	return l2cap_rx_state_recv(chan, control, NULL, event);
+}
+
+static int l2cap_rx_state_wait_f(struct l2cap_chan *chan,
+				 struct l2cap_ctrl *control,
+				 struct sk_buff *skb, u8 event)
+{
+	int err;
+
+	if (!control->final)
+		return -EPROTO;
+
+	clear_bit(CONN_REMOTE_BUSY, &chan->conn_state);
+
+	chan->rx_state = L2CAP_RX_STATE_RECV;
+	l2cap_process_reqseq(chan, control->reqseq);
+
+	if (!skb_queue_empty(&chan->tx_q))
+		chan->tx_send_head = skb_peek(&chan->tx_q);
+	else
+		chan->tx_send_head = NULL;
+
+	/* Rewind next_tx_seq to the point expected
+	 * by the receiver.
+	 */
+	chan->next_tx_seq = control->reqseq;
+	chan->unacked_frames = 0;
+
+	if (chan->hs_hcon)
+		chan->conn->mtu = chan->hs_hcon->hdev->block_mtu;
+	else
+		chan->conn->mtu = chan->conn->hcon->hdev->acl_mtu;
+
+	err = l2cap_resegment(chan);
+
+	if (!err)
+		err = l2cap_rx_state_recv(chan, control, skb, event);
+
+	return err;
+}
+
+static bool __valid_reqseq(struct l2cap_chan *chan, u16 reqseq)
+{
+	/* Make sure reqseq is for a packet that has been sent but not acked */
+	u16 unacked;
+
+	unacked = __seq_offset(chan, chan->next_tx_seq, chan->expected_ack_seq);
+	return __seq_offset(chan, chan->next_tx_seq, reqseq) <= unacked;
+}
+
+static int l2cap_rx(struct l2cap_chan *chan, struct l2cap_ctrl *control,
+		    struct sk_buff *skb, u8 event)
+{
+	int err = 0;
+
+	BT_DBG("chan %p, control %p, skb %p, event %d, state %d", chan,
+	       control, skb, event, chan->rx_state);
+
+	if (__valid_reqseq(chan, control->reqseq)) {
+		switch (chan->rx_state) {
+		case L2CAP_RX_STATE_RECV:
+			err = l2cap_rx_state_recv(chan, control, skb, event);
+			break;
+		case L2CAP_RX_STATE_SREJ_SENT:
+			err = l2cap_rx_state_srej_sent(chan, control, skb,
+						       event);
+			break;
+		case L2CAP_RX_STATE_WAIT_P:
+			err = l2cap_rx_state_wait_p(chan, control, skb, event);
+			break;
+		case L2CAP_RX_STATE_WAIT_F:
+			err = l2cap_rx_state_wait_f(chan, control, skb, event);
+			break;
+		default:
+			/* shut it down */
+			break;
+		}
+	} else {
+		BT_DBG("Invalid reqseq %d (next_tx_seq %d, expected_ack_seq %d",
+		       control->reqseq, chan->next_tx_seq,
+		       chan->expected_ack_seq);
+		l2cap_send_disconn_req(chan, ECONNRESET);
+	}
+
+	return err;
+}
+
+static int l2cap_stream_rx(struct l2cap_chan *chan, struct l2cap_ctrl *control,
+			   struct sk_buff *skb)
+{
+	/* l2cap_reassemble_sdu may free skb, hence invalidate control, so store
+	 * the txseq field in advance to use it after l2cap_reassemble_sdu
+	 * returns and to avoid the race condition, for example:
+	 *
+	 * The current thread calls:
+	 *   l2cap_reassemble_sdu
+	 *     chan->ops->recv == l2cap_sock_recv_cb
+	 *       __sock_queue_rcv_skb
+	 * Another thread calls:
+	 *   bt_sock_recvmsg
+	 *     skb_recv_datagram
+	 *     skb_free_datagram
+	 * Then the current thread tries to access control, but it was freed by
+	 * skb_free_datagram.
+	 */
+	u16 txseq = control->txseq;
+
+	BT_DBG("chan %p, control %p, skb %p, state %d", chan, control, skb,
+	       chan->rx_state);
+
+	if (l2cap_classify_txseq(chan, txseq) == L2CAP_TXSEQ_EXPECTED) {
+		l2cap_pass_to_tx(chan, control);
+
+		BT_DBG("buffer_seq %d->%d", chan->buffer_seq,
+		       __next_seq(chan, chan->buffer_seq));
+
+		chan->buffer_seq = __next_seq(chan, chan->buffer_seq);
+
+		l2cap_reassemble_sdu(chan, skb, control);
+	} else {
+		if (chan->sdu) {
+			kfree_skb(chan->sdu);
+			chan->sdu = NULL;
+		}
+		chan->sdu_last_frag = NULL;
+		chan->sdu_len = 0;
+
+		if (skb) {
+			BT_DBG("Freeing %p", skb);
+			kfree_skb(skb);
+		}
+	}
+
+	chan->last_acked_seq = txseq;
+	chan->expected_tx_seq = __next_seq(chan, txseq);
+
+	return 0;
+}
+
+static int l2cap_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb)
+{
+	struct l2cap_ctrl *control = &bt_cb(skb)->l2cap;
+	u16 len;
+	u8 event;
+
+	__unpack_control(chan, skb);
+
+	len = skb->len;
+
+	/*
+	 * We can just drop the corrupted I-frame here.
+	 * Receiver will miss it and start proper recovery
+	 * procedures and ask for retransmission.
+	 */
+	if (l2cap_check_fcs(chan, skb))
+		goto drop;
+
+	if (!control->sframe && control->sar == L2CAP_SAR_START)
+		len -= L2CAP_SDULEN_SIZE;
+
+	if (chan->fcs == L2CAP_FCS_CRC16)
+		len -= L2CAP_FCS_SIZE;
+
+	if (len > chan->mps) {
+		l2cap_send_disconn_req(chan, ECONNRESET);
+		goto drop;
+	}
+
+	if (chan->ops->filter) {
+		if (chan->ops->filter(chan, skb))
+			goto drop;
+	}
+
+	if (!control->sframe) {
+		int err;
+
+		BT_DBG("iframe sar %d, reqseq %d, final %d, txseq %d",
+		       control->sar, control->reqseq, control->final,
+		       control->txseq);
+
+		/* Validate F-bit - F=0 always valid, F=1 only
+		 * valid in TX WAIT_F
+		 */
+		if (control->final && chan->tx_state != L2CAP_TX_STATE_WAIT_F)
+			goto drop;
+
+		if (chan->mode != L2CAP_MODE_STREAMING) {
+			event = L2CAP_EV_RECV_IFRAME;
+			err = l2cap_rx(chan, control, skb, event);
+		} else {
+			err = l2cap_stream_rx(chan, control, skb);
+		}
+
+		if (err)
+			l2cap_send_disconn_req(chan, ECONNRESET);
+	} else {
+		const u8 rx_func_to_event[4] = {
+			L2CAP_EV_RECV_RR, L2CAP_EV_RECV_REJ,
+			L2CAP_EV_RECV_RNR, L2CAP_EV_RECV_SREJ
+		};
+
+		/* Only I-frames are expected in streaming mode */
+		if (chan->mode == L2CAP_MODE_STREAMING)
+			goto drop;
+
+		BT_DBG("sframe reqseq %d, final %d, poll %d, super %d",
+		       control->reqseq, control->final, control->poll,
+		       control->super);
+
+		if (len != 0) {
+			BT_ERR("Trailing bytes: %d in sframe", len);
+			l2cap_send_disconn_req(chan, ECONNRESET);
+			goto drop;
+		}
+
+		/* Validate F and P bits */
+		if (control->final && (control->poll ||
+				       chan->tx_state != L2CAP_TX_STATE_WAIT_F))
+			goto drop;
+
+		event = rx_func_to_event[control->super];
+		if (l2cap_rx(chan, control, skb, event))
+			l2cap_send_disconn_req(chan, ECONNRESET);
+	}
+
+	return 0;
+
+drop:
+	kfree_skb(skb);
+	return 0;
+}
+
+static void l2cap_chan_le_send_credits(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct l2cap_le_credits pkt;
+	u16 return_credits;
+
+	return_credits = (chan->imtu / chan->mps) + 1;
+
+	if (chan->rx_credits >= return_credits)
+		return;
+
+	return_credits -= chan->rx_credits;
+
+	BT_DBG("chan %p returning %u credits to sender", chan, return_credits);
+
+	chan->rx_credits += return_credits;
+
+	pkt.cid     = cpu_to_le16(chan->scid);
+	pkt.credits = cpu_to_le16(return_credits);
+
+	chan->ident = l2cap_get_ident(conn);
+
+	l2cap_send_cmd(conn, chan->ident, L2CAP_LE_CREDITS, sizeof(pkt), &pkt);
+}
+
+static int l2cap_ecred_recv(struct l2cap_chan *chan, struct sk_buff *skb)
+{
+	int err;
+
+	BT_DBG("SDU reassemble complete: chan %p skb->len %u", chan, skb->len);
+
+	/* Wait recv to confirm reception before updating the credits */
+	err = chan->ops->recv(chan, skb);
+
+	/* Update credits whenever an SDU is received */
+	l2cap_chan_le_send_credits(chan);
+
+	return err;
+}
+
+static int l2cap_ecred_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb)
+{
+	int err;
+
+	if (!chan->rx_credits) {
+		BT_ERR("No credits to receive LE L2CAP data");
+		l2cap_send_disconn_req(chan, ECONNRESET);
+		return -ENOBUFS;
+	}
+
+	if (chan->imtu < skb->len) {
+		BT_ERR("Too big LE L2CAP PDU");
+		return -ENOBUFS;
+	}
+
+	chan->rx_credits--;
+	BT_DBG("rx_credits %u -> %u", chan->rx_credits + 1, chan->rx_credits);
+
+	/* Update if remote had run out of credits, this should only happens
+	 * if the remote is not using the entire MPS.
+	 */
+	if (!chan->rx_credits)
+		l2cap_chan_le_send_credits(chan);
+
+	err = 0;
+
+	if (!chan->sdu) {
+		u16 sdu_len;
+
+		sdu_len = get_unaligned_le16(skb->data);
+		skb_pull(skb, L2CAP_SDULEN_SIZE);
+
+		BT_DBG("Start of new SDU. sdu_len %u skb->len %u imtu %u",
+		       sdu_len, skb->len, chan->imtu);
+
+		if (sdu_len > chan->imtu) {
+			BT_ERR("Too big LE L2CAP SDU length received");
+			err = -EMSGSIZE;
+			goto failed;
+		}
+
+		if (skb->len > sdu_len) {
+			BT_ERR("Too much LE L2CAP data received");
+			err = -EINVAL;
+			goto failed;
+		}
+
+		if (skb->len == sdu_len)
+			return l2cap_ecred_recv(chan, skb);
+
+		chan->sdu = skb;
+		chan->sdu_len = sdu_len;
+		chan->sdu_last_frag = skb;
+
+		/* Detect if remote is not able to use the selected MPS */
+		if (skb->len + L2CAP_SDULEN_SIZE < chan->mps) {
+			u16 mps_len = skb->len + L2CAP_SDULEN_SIZE;
+
+			/* Adjust the number of credits */
+			BT_DBG("chan->mps %u -> %u", chan->mps, mps_len);
+			chan->mps = mps_len;
+			l2cap_chan_le_send_credits(chan);
+		}
+
+		return 0;
+	}
+
+	BT_DBG("SDU fragment. chan->sdu->len %u skb->len %u chan->sdu_len %u",
+	       chan->sdu->len, skb->len, chan->sdu_len);
+
+	if (chan->sdu->len + skb->len > chan->sdu_len) {
+		BT_ERR("Too much LE L2CAP data received");
+		err = -EINVAL;
+		goto failed;
+	}
+
+	append_skb_frag(chan->sdu, skb, &chan->sdu_last_frag);
+	skb = NULL;
+
+	if (chan->sdu->len == chan->sdu_len) {
+		err = l2cap_ecred_recv(chan, chan->sdu);
+		if (!err) {
+			chan->sdu = NULL;
+			chan->sdu_last_frag = NULL;
+			chan->sdu_len = 0;
+		}
+	}
+
+failed:
+	if (err) {
+		kfree_skb(skb);
+		kfree_skb(chan->sdu);
+		chan->sdu = NULL;
+		chan->sdu_last_frag = NULL;
+		chan->sdu_len = 0;
+	}
+
+	/* We can't return an error here since we took care of the skb
+	 * freeing internally. An error return would cause the caller to
+	 * do a double-free of the skb.
+	 */
+	return 0;
+}
+
+static void l2cap_data_channel(struct l2cap_conn *conn, u16 cid,
+			       struct sk_buff *skb)
+{
+	struct l2cap_chan *chan;
+
+	chan = l2cap_get_chan_by_scid(conn, cid);
+	if (!chan) {
+		if (cid == L2CAP_CID_A2MP) {
+			chan = a2mp_channel_create(conn, skb);
+			if (!chan) {
+				kfree_skb(skb);
+				return;
+			}
+
+			l2cap_chan_hold(chan);
+			l2cap_chan_lock(chan);
+		} else {
+			BT_DBG("unknown cid 0x%4.4x", cid);
+			/* Drop packet and return */
+			kfree_skb(skb);
+			return;
+		}
+	}
+
+	BT_DBG("chan %p, len %d", chan, skb->len);
+
+	/* If we receive data on a fixed channel before the info req/rsp
+	 * procedure is done simply assume that the channel is supported
+	 * and mark it as ready.
+	 */
+	if (chan->chan_type == L2CAP_CHAN_FIXED)
+		l2cap_chan_ready(chan);
+
+	if (chan->state != BT_CONNECTED)
+		goto drop;
+
+	switch (chan->mode) {
+	case L2CAP_MODE_LE_FLOWCTL:
+	case L2CAP_MODE_EXT_FLOWCTL:
+		if (l2cap_ecred_data_rcv(chan, skb) < 0)
+			goto drop;
+
+		goto done;
+
+	case L2CAP_MODE_BASIC:
+		/* If socket recv buffers overflows we drop data here
+		 * which is *bad* because L2CAP has to be reliable.
+		 * But we don't have any other choice. L2CAP doesn't
+		 * provide flow control mechanism. */
+
+		if (chan->imtu < skb->len) {
+			BT_ERR("Dropping L2CAP data: receive buffer overflow");
+			goto drop;
+		}
+
+		if (!chan->ops->recv(chan, skb))
+			goto done;
+		break;
+
+	case L2CAP_MODE_ERTM:
+	case L2CAP_MODE_STREAMING:
+		l2cap_data_rcv(chan, skb);
+		goto done;
+
+	default:
+		BT_DBG("chan %p: bad mode 0x%2.2x", chan, chan->mode);
+		break;
+	}
+
+drop:
+	kfree_skb(skb);
+
+done:
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+}
+
+static void l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm,
+				  struct sk_buff *skb)
+{
+	struct hci_conn *hcon = conn->hcon;
+	struct l2cap_chan *chan;
+
+	if (hcon->type != ACL_LINK)
+		goto free_skb;
+
+	chan = l2cap_global_chan_by_psm(0, psm, &hcon->src, &hcon->dst,
+					ACL_LINK);
+	if (!chan)
+		goto free_skb;
+
+	BT_DBG("chan %p, len %d", chan, skb->len);
+
+	if (chan->state != BT_BOUND && chan->state != BT_CONNECTED)
+		goto drop;
+
+	if (chan->imtu < skb->len)
+		goto drop;
+
+	/* Store remote BD_ADDR and PSM for msg_name */
+	bacpy(&bt_cb(skb)->l2cap.bdaddr, &hcon->dst);
+	bt_cb(skb)->l2cap.psm = psm;
+
+	if (!chan->ops->recv(chan, skb)) {
+		l2cap_chan_put(chan);
+		return;
+	}
+
+drop:
+	l2cap_chan_put(chan);
+free_skb:
+	kfree_skb(skb);
+}
+
+static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+	struct l2cap_hdr *lh = (void *) skb->data;
+	struct hci_conn *hcon = conn->hcon;
+	u16 cid, len;
+	__le16 psm;
+
+	if (hcon->state != BT_CONNECTED) {
+		BT_DBG("queueing pending rx skb");
+		skb_queue_tail(&conn->pending_rx, skb);
+		return;
+	}
+
+	skb_pull(skb, L2CAP_HDR_SIZE);
+	cid = __le16_to_cpu(lh->cid);
+	len = __le16_to_cpu(lh->len);
+
+	if (len != skb->len) {
+		kfree_skb(skb);
+		return;
+	}
+
+	/* Since we can't actively block incoming LE connections we must
+	 * at least ensure that we ignore incoming data from them.
+	 */
+	if (hcon->type == LE_LINK &&
+	    hci_bdaddr_list_lookup(&hcon->hdev->reject_list, &hcon->dst,
+				   bdaddr_dst_type(hcon))) {
+		kfree_skb(skb);
+		return;
+	}
+
+	BT_DBG("len %d, cid 0x%4.4x", len, cid);
+
+	switch (cid) {
+	case L2CAP_CID_SIGNALING:
+		l2cap_sig_channel(conn, skb);
+		break;
+
+	case L2CAP_CID_CONN_LESS:
+		psm = get_unaligned((__le16 *) skb->data);
+		skb_pull(skb, L2CAP_PSMLEN_SIZE);
+		l2cap_conless_channel(conn, psm, skb);
+		break;
+
+	case L2CAP_CID_LE_SIGNALING:
+		l2cap_le_sig_channel(conn, skb);
+		break;
+
+	default:
+		l2cap_data_channel(conn, cid, skb);
+		break;
+	}
+}
+
+static void process_pending_rx(struct work_struct *work)
+{
+	struct l2cap_conn *conn = container_of(work, struct l2cap_conn,
+					       pending_rx_work);
+	struct sk_buff *skb;
+
+	BT_DBG("");
+
+	while ((skb = skb_dequeue(&conn->pending_rx)))
+		l2cap_recv_frame(conn, skb);
+}
+
+static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon)
+{
+	struct l2cap_conn *conn = hcon->l2cap_data;
+	struct hci_chan *hchan;
+
+	if (conn)
+		return conn;
+
+	hchan = hci_chan_create(hcon);
+	if (!hchan)
+		return NULL;
+
+	conn = kzalloc(sizeof(*conn), GFP_KERNEL);
+	if (!conn) {
+		hci_chan_del(hchan);
+		return NULL;
+	}
+
+	kref_init(&conn->ref);
+	hcon->l2cap_data = conn;
+	conn->hcon = hci_conn_get(hcon);
+	conn->hchan = hchan;
+
+	BT_DBG("hcon %p conn %p hchan %p", hcon, conn, hchan);
+
+	switch (hcon->type) {
+	case LE_LINK:
+		if (hcon->hdev->le_mtu) {
+			conn->mtu = hcon->hdev->le_mtu;
+			break;
+		}
+		fallthrough;
+	default:
+		conn->mtu = hcon->hdev->acl_mtu;
+		break;
+	}
+
+	conn->feat_mask = 0;
+
+	conn->local_fixed_chan = L2CAP_FC_SIG_BREDR | L2CAP_FC_CONNLESS;
+
+	if (hcon->type == ACL_LINK &&
+	    hci_dev_test_flag(hcon->hdev, HCI_HS_ENABLED))
+		conn->local_fixed_chan |= L2CAP_FC_A2MP;
+
+	if (hci_dev_test_flag(hcon->hdev, HCI_LE_ENABLED) &&
+	    (bredr_sc_enabled(hcon->hdev) ||
+	     hci_dev_test_flag(hcon->hdev, HCI_FORCE_BREDR_SMP)))
+		conn->local_fixed_chan |= L2CAP_FC_SMP_BREDR;
+
+	mutex_init(&conn->ident_lock);
+	mutex_init(&conn->chan_lock);
+
+	INIT_LIST_HEAD(&conn->chan_l);
+	INIT_LIST_HEAD(&conn->users);
+
+	INIT_DELAYED_WORK(&conn->info_timer, l2cap_info_timeout);
+
+	skb_queue_head_init(&conn->pending_rx);
+	INIT_WORK(&conn->pending_rx_work, process_pending_rx);
+	INIT_WORK(&conn->id_addr_update_work, l2cap_conn_update_id_addr);
+
+	conn->disc_reason = HCI_ERROR_REMOTE_USER_TERM;
+
+	return conn;
+}
+
+static bool is_valid_psm(u16 psm, u8 dst_type) {
+	if (!psm)
+		return false;
+
+	if (bdaddr_type_is_le(dst_type))
+		return (psm <= 0x00ff);
+
+	/* PSM must be odd and lsb of upper byte must be 0 */
+	return ((psm & 0x0101) == 0x0001);
+}
+
+struct l2cap_chan_data {
+	struct l2cap_chan *chan;
+	struct pid *pid;
+	int count;
+};
+
+static void l2cap_chan_by_pid(struct l2cap_chan *chan, void *data)
+{
+	struct l2cap_chan_data *d = data;
+	struct pid *pid;
+
+	if (chan == d->chan)
+		return;
+
+	if (!test_bit(FLAG_DEFER_SETUP, &chan->flags))
+		return;
+
+	pid = chan->ops->get_peer_pid(chan);
+
+	/* Only count deferred channels with the same PID/PSM */
+	if (d->pid != pid || chan->psm != d->chan->psm || chan->ident ||
+	    chan->mode != L2CAP_MODE_EXT_FLOWCTL || chan->state != BT_CONNECT)
+		return;
+
+	d->count++;
+}
+
+int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
+		       bdaddr_t *dst, u8 dst_type)
+{
+	struct l2cap_conn *conn;
+	struct hci_conn *hcon;
+	struct hci_dev *hdev;
+	int err;
+
+	BT_DBG("%pMR -> %pMR (type %u) psm 0x%4.4x mode 0x%2.2x", &chan->src,
+	       dst, dst_type, __le16_to_cpu(psm), chan->mode);
+
+	hdev = hci_get_route(dst, &chan->src, chan->src_type);
+	if (!hdev)
+		return -EHOSTUNREACH;
+
+	hci_dev_lock(hdev);
+
+	if (!is_valid_psm(__le16_to_cpu(psm), dst_type) && !cid &&
+	    chan->chan_type != L2CAP_CHAN_RAW) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && !psm) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	if (chan->chan_type == L2CAP_CHAN_FIXED && !cid) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	switch (chan->mode) {
+	case L2CAP_MODE_BASIC:
+		break;
+	case L2CAP_MODE_LE_FLOWCTL:
+		break;
+	case L2CAP_MODE_EXT_FLOWCTL:
+		if (!enable_ecred) {
+			err = -EOPNOTSUPP;
+			goto done;
+		}
+		break;
+	case L2CAP_MODE_ERTM:
+	case L2CAP_MODE_STREAMING:
+		if (!disable_ertm)
+			break;
+		fallthrough;
+	default:
+		err = -EOPNOTSUPP;
+		goto done;
+	}
+
+	switch (chan->state) {
+	case BT_CONNECT:
+	case BT_CONNECT2:
+	case BT_CONFIG:
+		/* Already connecting */
+		err = 0;
+		goto done;
+
+	case BT_CONNECTED:
+		/* Already connected */
+		err = -EISCONN;
+		goto done;
+
+	case BT_OPEN:
+	case BT_BOUND:
+		/* Can connect */
+		break;
+
+	default:
+		err = -EBADFD;
+		goto done;
+	}
+
+	/* Set destination address and psm */
+	bacpy(&chan->dst, dst);
+	chan->dst_type = dst_type;
+
+	chan->psm = psm;
+	chan->dcid = cid;
+
+	if (bdaddr_type_is_le(dst_type)) {
+		/* Convert from L2CAP channel address type to HCI address type
+		 */
+		if (dst_type == BDADDR_LE_PUBLIC)
+			dst_type = ADDR_LE_DEV_PUBLIC;
+		else
+			dst_type = ADDR_LE_DEV_RANDOM;
+
+		if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
+			hcon = hci_connect_le(hdev, dst, dst_type,
+					      chan->sec_level,
+					      HCI_LE_CONN_TIMEOUT,
+					      HCI_ROLE_SLAVE, NULL);
+		else
+			hcon = hci_connect_le_scan(hdev, dst, dst_type,
+						   chan->sec_level,
+						   HCI_LE_CONN_TIMEOUT,
+						   CONN_REASON_L2CAP_CHAN);
+
+	} else {
+		u8 auth_type = l2cap_get_auth_type(chan);
+		hcon = hci_connect_acl(hdev, dst, chan->sec_level, auth_type,
+				       CONN_REASON_L2CAP_CHAN);
+	}
+
+	if (IS_ERR(hcon)) {
+		err = PTR_ERR(hcon);
+		goto done;
+	}
+
+	conn = l2cap_conn_add(hcon);
+	if (!conn) {
+		hci_conn_drop(hcon);
+		err = -ENOMEM;
+		goto done;
+	}
+
+	if (chan->mode == L2CAP_MODE_EXT_FLOWCTL) {
+		struct l2cap_chan_data data;
+
+		data.chan = chan;
+		data.pid = chan->ops->get_peer_pid(chan);
+		data.count = 1;
+
+		l2cap_chan_list(conn, l2cap_chan_by_pid, &data);
+
+		/* Check if there isn't too many channels being connected */
+		if (data.count > L2CAP_ECRED_CONN_SCID_MAX) {
+			hci_conn_drop(hcon);
+			err = -EPROTO;
+			goto done;
+		}
+	}
+
+	mutex_lock(&conn->chan_lock);
+	l2cap_chan_lock(chan);
+
+	if (cid && __l2cap_get_chan_by_dcid(conn, cid)) {
+		hci_conn_drop(hcon);
+		err = -EBUSY;
+		goto chan_unlock;
+	}
+
+	/* Update source addr of the socket */
+	bacpy(&chan->src, &hcon->src);
+	chan->src_type = bdaddr_src_type(hcon);
+
+	__l2cap_chan_add(conn, chan);
+
+	/* l2cap_chan_add takes its own ref so we can drop this one */
+	hci_conn_drop(hcon);
+
+	l2cap_state_change(chan, BT_CONNECT);
+	__set_chan_timer(chan, chan->ops->get_sndtimeo(chan));
+
+	/* Release chan->sport so that it can be reused by other
+	 * sockets (as it's only used for listening sockets).
+	 */
+	write_lock(&chan_list_lock);
+	chan->sport = 0;
+	write_unlock(&chan_list_lock);
+
+	if (hcon->state == BT_CONNECTED) {
+		if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
+			__clear_chan_timer(chan);
+			if (l2cap_chan_check_security(chan, true))
+				l2cap_state_change(chan, BT_CONNECTED);
+		} else
+			l2cap_do_start(chan);
+	}
+
+	err = 0;
+
+chan_unlock:
+	l2cap_chan_unlock(chan);
+	mutex_unlock(&conn->chan_lock);
+done:
+	hci_dev_unlock(hdev);
+	hci_dev_put(hdev);
+	return err;
+}
+EXPORT_SYMBOL_GPL(l2cap_chan_connect);
+
+static void l2cap_ecred_reconfigure(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct {
+		struct l2cap_ecred_reconf_req req;
+		__le16 scid;
+	} pdu;
+
+	pdu.req.mtu = cpu_to_le16(chan->imtu);
+	pdu.req.mps = cpu_to_le16(chan->mps);
+	pdu.scid    = cpu_to_le16(chan->scid);
+
+	chan->ident = l2cap_get_ident(conn);
+
+	l2cap_send_cmd(conn, chan->ident, L2CAP_ECRED_RECONF_REQ,
+		       sizeof(pdu), &pdu);
+}
+
+int l2cap_chan_reconfigure(struct l2cap_chan *chan, __u16 mtu)
+{
+	if (chan->imtu > mtu)
+		return -EINVAL;
+
+	BT_DBG("chan %p mtu 0x%4.4x", chan, mtu);
+
+	chan->imtu = mtu;
+
+	l2cap_ecred_reconfigure(chan);
+
+	return 0;
+}
+
+/* ---- L2CAP interface with lower layer (HCI) ---- */
+
+int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr)
+{
+	int exact = 0, lm1 = 0, lm2 = 0;
+	struct l2cap_chan *c;
+
+	BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr);
+
+	/* Find listening sockets and check their link_mode */
+	read_lock(&chan_list_lock);
+	list_for_each_entry(c, &chan_list, global_l) {
+		if (c->state != BT_LISTEN)
+			continue;
+
+		if (!bacmp(&c->src, &hdev->bdaddr)) {
+			lm1 |= HCI_LM_ACCEPT;
+			if (test_bit(FLAG_ROLE_SWITCH, &c->flags))
+				lm1 |= HCI_LM_MASTER;
+			exact++;
+		} else if (!bacmp(&c->src, BDADDR_ANY)) {
+			lm2 |= HCI_LM_ACCEPT;
+			if (test_bit(FLAG_ROLE_SWITCH, &c->flags))
+				lm2 |= HCI_LM_MASTER;
+		}
+	}
+	read_unlock(&chan_list_lock);
+
+	return exact ? lm1 : lm2;
+}
+
+/* Find the next fixed channel in BT_LISTEN state, continue iteration
+ * from an existing channel in the list or from the beginning of the
+ * global list (by passing NULL as first parameter).
+ */
+static struct l2cap_chan *l2cap_global_fixed_chan(struct l2cap_chan *c,
+						  struct hci_conn *hcon)
+{
+	u8 src_type = bdaddr_src_type(hcon);
+
+	read_lock(&chan_list_lock);
+
+	if (c)
+		c = list_next_entry(c, global_l);
+	else
+		c = list_entry(chan_list.next, typeof(*c), global_l);
+
+	list_for_each_entry_from(c, &chan_list, global_l) {
+		if (c->chan_type != L2CAP_CHAN_FIXED)
+			continue;
+		if (c->state != BT_LISTEN)
+			continue;
+		if (bacmp(&c->src, &hcon->src) && bacmp(&c->src, BDADDR_ANY))
+			continue;
+		if (src_type != c->src_type)
+			continue;
+
+		c = l2cap_chan_hold_unless_zero(c);
+		read_unlock(&chan_list_lock);
+		return c;
+	}
+
+	read_unlock(&chan_list_lock);
+
+	return NULL;
+}
+
+static void l2cap_connect_cfm(struct hci_conn *hcon, u8 status)
+{
+	struct hci_dev *hdev = hcon->hdev;
+	struct l2cap_conn *conn;
+	struct l2cap_chan *pchan;
+	u8 dst_type;
+
+	if (hcon->type != ACL_LINK && hcon->type != LE_LINK)
+		return;
+
+	BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status);
+
+	if (status) {
+		l2cap_conn_del(hcon, bt_to_errno(status));
+		return;
+	}
+
+	conn = l2cap_conn_add(hcon);
+	if (!conn)
+		return;
+
+	dst_type = bdaddr_dst_type(hcon);
+
+	/* If device is blocked, do not create channels for it */
+	if (hci_bdaddr_list_lookup(&hdev->reject_list, &hcon->dst, dst_type))
+		return;
+
+	/* Find fixed channels and notify them of the new connection. We
+	 * use multiple individual lookups, continuing each time where
+	 * we left off, because the list lock would prevent calling the
+	 * potentially sleeping l2cap_chan_lock() function.
+	 */
+	pchan = l2cap_global_fixed_chan(NULL, hcon);
+	while (pchan) {
+		struct l2cap_chan *chan, *next;
+
+		/* Client fixed channels should override server ones */
+		if (__l2cap_get_chan_by_dcid(conn, pchan->scid))
+			goto next;
+
+		l2cap_chan_lock(pchan);
+		chan = pchan->ops->new_connection(pchan);
+		if (chan) {
+			bacpy(&chan->src, &hcon->src);
+			bacpy(&chan->dst, &hcon->dst);
+			chan->src_type = bdaddr_src_type(hcon);
+			chan->dst_type = dst_type;
+
+			__l2cap_chan_add(conn, chan);
+		}
+
+		l2cap_chan_unlock(pchan);
+next:
+		next = l2cap_global_fixed_chan(pchan, hcon);
+		l2cap_chan_put(pchan);
+		pchan = next;
+	}
+
+	l2cap_conn_ready(conn);
+}
+
+int l2cap_disconn_ind(struct hci_conn *hcon)
+{
+	struct l2cap_conn *conn = hcon->l2cap_data;
+
+	BT_DBG("hcon %p", hcon);
+
+	if (!conn)
+		return HCI_ERROR_REMOTE_USER_TERM;
+	return conn->disc_reason;
+}
+
+static void l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason)
+{
+	if (hcon->type != ACL_LINK && hcon->type != LE_LINK)
+		return;
+
+	BT_DBG("hcon %p reason %d", hcon, reason);
+
+	l2cap_conn_del(hcon, bt_to_errno(reason));
+}
+
+static inline void l2cap_check_encryption(struct l2cap_chan *chan, u8 encrypt)
+{
+	if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED)
+		return;
+
+	if (encrypt == 0x00) {
+		if (chan->sec_level == BT_SECURITY_MEDIUM) {
+			__set_chan_timer(chan, L2CAP_ENC_TIMEOUT);
+		} else if (chan->sec_level == BT_SECURITY_HIGH ||
+			   chan->sec_level == BT_SECURITY_FIPS)
+			l2cap_chan_close(chan, ECONNREFUSED);
+	} else {
+		if (chan->sec_level == BT_SECURITY_MEDIUM)
+			__clear_chan_timer(chan);
+	}
+}
+
+static void l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt)
+{
+	struct l2cap_conn *conn = hcon->l2cap_data;
+	struct l2cap_chan *chan;
+
+	if (!conn)
+		return;
+
+	BT_DBG("conn %p status 0x%2.2x encrypt %u", conn, status, encrypt);
+
+	mutex_lock(&conn->chan_lock);
+
+	list_for_each_entry(chan, &conn->chan_l, list) {
+		l2cap_chan_lock(chan);
+
+		BT_DBG("chan %p scid 0x%4.4x state %s", chan, chan->scid,
+		       state_to_string(chan->state));
+
+		if (chan->scid == L2CAP_CID_A2MP) {
+			l2cap_chan_unlock(chan);
+			continue;
+		}
+
+		if (!status && encrypt)
+			chan->sec_level = hcon->sec_level;
+
+		if (!__l2cap_no_conn_pending(chan)) {
+			l2cap_chan_unlock(chan);
+			continue;
+		}
+
+		if (!status && (chan->state == BT_CONNECTED ||
+				chan->state == BT_CONFIG)) {
+			chan->ops->resume(chan);
+			l2cap_check_encryption(chan, encrypt);
+			l2cap_chan_unlock(chan);
+			continue;
+		}
+
+		if (chan->state == BT_CONNECT) {
+			if (!status && l2cap_check_enc_key_size(hcon))
+				l2cap_start_connection(chan);
+			else
+				__set_chan_timer(chan, L2CAP_DISC_TIMEOUT);
+		} else if (chan->state == BT_CONNECT2 &&
+			   !(chan->mode == L2CAP_MODE_EXT_FLOWCTL ||
+			     chan->mode == L2CAP_MODE_LE_FLOWCTL)) {
+			struct l2cap_conn_rsp rsp;
+			__u16 res, stat;
+
+			if (!status && l2cap_check_enc_key_size(hcon)) {
+				if (test_bit(FLAG_DEFER_SETUP, &chan->flags)) {
+					res = L2CAP_CR_PEND;
+					stat = L2CAP_CS_AUTHOR_PEND;
+					chan->ops->defer(chan);
+				} else {
+					l2cap_state_change(chan, BT_CONFIG);
+					res = L2CAP_CR_SUCCESS;
+					stat = L2CAP_CS_NO_INFO;
+				}
+			} else {
+				l2cap_state_change(chan, BT_DISCONN);
+				__set_chan_timer(chan, L2CAP_DISC_TIMEOUT);
+				res = L2CAP_CR_SEC_BLOCK;
+				stat = L2CAP_CS_NO_INFO;
+			}
+
+			rsp.scid   = cpu_to_le16(chan->dcid);
+			rsp.dcid   = cpu_to_le16(chan->scid);
+			rsp.result = cpu_to_le16(res);
+			rsp.status = cpu_to_le16(stat);
+			l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP,
+				       sizeof(rsp), &rsp);
+
+			if (!test_bit(CONF_REQ_SENT, &chan->conf_state) &&
+			    res == L2CAP_CR_SUCCESS) {
+				char buf[128];
+				set_bit(CONF_REQ_SENT, &chan->conf_state);
+				l2cap_send_cmd(conn, l2cap_get_ident(conn),
+					       L2CAP_CONF_REQ,
+					       l2cap_build_conf_req(chan, buf, sizeof(buf)),
+					       buf);
+				chan->num_conf_req++;
+			}
+		}
+
+		l2cap_chan_unlock(chan);
+	}
+
+	mutex_unlock(&conn->chan_lock);
+}
+
+void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags)
+{
+	struct l2cap_conn *conn = hcon->l2cap_data;
+	struct l2cap_hdr *hdr;
+	int len;
+
+	/* For AMP controller do not create l2cap conn */
+	if (!conn && hcon->hdev->dev_type != HCI_PRIMARY)
+		goto drop;
+
+	if (!conn)
+		conn = l2cap_conn_add(hcon);
+
+	if (!conn)
+		goto drop;
+
+	BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags);
+
+	switch (flags) {
+	case ACL_START:
+	case ACL_START_NO_FLUSH:
+	case ACL_COMPLETE:
+		if (conn->rx_len) {
+			BT_ERR("Unexpected start frame (len %d)", skb->len);
+			kfree_skb(conn->rx_skb);
+			conn->rx_skb = NULL;
+			conn->rx_len = 0;
+			l2cap_conn_unreliable(conn, ECOMM);
+		}
+
+		/* Start fragment always begin with Basic L2CAP header */
+		if (skb->len < L2CAP_HDR_SIZE) {
+			BT_ERR("Frame is too short (len %d)", skb->len);
+			l2cap_conn_unreliable(conn, ECOMM);
+			goto drop;
+		}
+
+		hdr = (struct l2cap_hdr *) skb->data;
+		len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE;
+
+		if (len == skb->len) {
+			/* Complete frame received */
+			l2cap_recv_frame(conn, skb);
+			return;
+		}
+
+		BT_DBG("Start: total len %d, frag len %d", len, skb->len);
+
+		if (skb->len > len) {
+			BT_ERR("Frame is too long (len %d, expected len %d)",
+			       skb->len, len);
+			l2cap_conn_unreliable(conn, ECOMM);
+			goto drop;
+		}
+
+		/* Allocate skb for the complete frame (with header) */
+		conn->rx_skb = bt_skb_alloc(len, GFP_KERNEL);
+		if (!conn->rx_skb)
+			goto drop;
+
+		skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
+					  skb->len);
+		conn->rx_len = len - skb->len;
+		break;
+
+	case ACL_CONT:
+		BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len);
+
+		if (!conn->rx_len) {
+			BT_ERR("Unexpected continuation frame (len %d)", skb->len);
+			l2cap_conn_unreliable(conn, ECOMM);
+			goto drop;
+		}
+
+		if (skb->len > conn->rx_len) {
+			BT_ERR("Fragment is too long (len %d, expected %d)",
+			       skb->len, conn->rx_len);
+			kfree_skb(conn->rx_skb);
+			conn->rx_skb = NULL;
+			conn->rx_len = 0;
+			l2cap_conn_unreliable(conn, ECOMM);
+			goto drop;
+		}
+
+		skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
+					  skb->len);
+		conn->rx_len -= skb->len;
+
+		if (!conn->rx_len) {
+			/* Complete frame received. l2cap_recv_frame
+			 * takes ownership of the skb so set the global
+			 * rx_skb pointer to NULL first.
+			 */
+			struct sk_buff *rx_skb = conn->rx_skb;
+			conn->rx_skb = NULL;
+			l2cap_recv_frame(conn, rx_skb);
+		}
+		break;
+	}
+
+drop:
+	kfree_skb(skb);
+}
+
+static struct hci_cb l2cap_cb = {
+	.name		= "L2CAP",
+	.connect_cfm	= l2cap_connect_cfm,
+	.disconn_cfm	= l2cap_disconn_cfm,
+	.security_cfm	= l2cap_security_cfm,
+};
+
+static int l2cap_debugfs_show(struct seq_file *f, void *p)
+{
+	struct l2cap_chan *c;
+
+	read_lock(&chan_list_lock);
+
+	list_for_each_entry(c, &chan_list, global_l) {
+		seq_printf(f, "%pMR (%u) %pMR (%u) %d %d 0x%4.4x 0x%4.4x %d %d %d %d\n",
+			   &c->src, c->src_type, &c->dst, c->dst_type,
+			   c->state, __le16_to_cpu(c->psm),
+			   c->scid, c->dcid, c->imtu, c->omtu,
+			   c->sec_level, c->mode);
+	}
+
+	read_unlock(&chan_list_lock);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(l2cap_debugfs);
+
+static struct dentry *l2cap_debugfs;
+
+int __init l2cap_init(void)
+{
+	int err;
+
+	err = l2cap_init_sockets();
+	if (err < 0)
+		return err;
+
+	hci_register_cb(&l2cap_cb);
+
+	if (IS_ERR_OR_NULL(bt_debugfs))
+		return 0;
+
+	l2cap_debugfs = debugfs_create_file("l2cap", 0444, bt_debugfs,
+					    NULL, &l2cap_debugfs_fops);
+
+	return 0;
+}
+
+void l2cap_exit(void)
+{
+	debugfs_remove(l2cap_debugfs);
+	hci_unregister_cb(&l2cap_cb);
+	l2cap_cleanup_sockets();
+}
+
+module_param(disable_ertm, bool, 0644);
+MODULE_PARM_DESC(disable_ertm, "Disable enhanced retransmission mode");
+
+module_param(enable_ecred, bool, 0644);
+MODULE_PARM_DESC(enable_ecred, "Enable enhanced credit flow control mode");
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
new file mode 100644
index 000000000..756523e54
--- /dev/null
+++ b/net/bluetooth/l2cap_sock.c
@@ -0,0 +1,1980 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2000-2001 Qualcomm Incorporated
+   Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org>
+   Copyright (C) 2010 Google Inc.
+   Copyright (C) 2011 ProFUSION Embedded Systems
+
+   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth L2CAP sockets. */
+
+#include <linux/module.h>
+#include <linux/export.h>
+#include <linux/sched/signal.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/l2cap.h>
+
+#include "smp.h"
+
+static struct bt_sock_list l2cap_sk_list = {
+	.lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock)
+};
+
+static const struct proto_ops l2cap_sock_ops;
+static void l2cap_sock_init(struct sock *sk, struct sock *parent);
+static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock,
+				     int proto, gfp_t prio, int kern);
+static void l2cap_sock_cleanup_listen(struct sock *parent);
+
+bool l2cap_is_socket(struct socket *sock)
+{
+	return sock && sock->ops == &l2cap_sock_ops;
+}
+EXPORT_SYMBOL(l2cap_is_socket);
+
+static int l2cap_validate_bredr_psm(u16 psm)
+{
+	/* PSM must be odd and lsb of upper byte must be 0 */
+	if ((psm & 0x0101) != 0x0001)
+		return -EINVAL;
+
+	/* Restrict usage of well-known PSMs */
+	if (psm < L2CAP_PSM_DYN_START && !capable(CAP_NET_BIND_SERVICE))
+		return -EACCES;
+
+	return 0;
+}
+
+static int l2cap_validate_le_psm(u16 psm)
+{
+	/* Valid LE_PSM ranges are defined only until 0x00ff */
+	if (psm > L2CAP_PSM_LE_DYN_END)
+		return -EINVAL;
+
+	/* Restrict fixed, SIG assigned PSM values to CAP_NET_BIND_SERVICE */
+	if (psm < L2CAP_PSM_LE_DYN_START && !capable(CAP_NET_BIND_SERVICE))
+		return -EACCES;
+
+	return 0;
+}
+
+static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
+{
+	struct sock *sk = sock->sk;
+	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+	struct sockaddr_l2 la;
+	int len, err = 0;
+
+	BT_DBG("sk %p", sk);
+
+	if (!addr || alen < offsetofend(struct sockaddr, sa_family) ||
+	    addr->sa_family != AF_BLUETOOTH)
+		return -EINVAL;
+
+	memset(&la, 0, sizeof(la));
+	len = min_t(unsigned int, sizeof(la), alen);
+	memcpy(&la, addr, len);
+
+	if (la.l2_cid && la.l2_psm)
+		return -EINVAL;
+
+	if (!bdaddr_type_is_valid(la.l2_bdaddr_type))
+		return -EINVAL;
+
+	if (bdaddr_type_is_le(la.l2_bdaddr_type)) {
+		/* We only allow ATT user space socket */
+		if (la.l2_cid &&
+		    la.l2_cid != cpu_to_le16(L2CAP_CID_ATT))
+			return -EINVAL;
+	}
+
+	lock_sock(sk);
+
+	if (sk->sk_state != BT_OPEN) {
+		err = -EBADFD;
+		goto done;
+	}
+
+	if (la.l2_psm) {
+		__u16 psm = __le16_to_cpu(la.l2_psm);
+
+		if (la.l2_bdaddr_type == BDADDR_BREDR)
+			err = l2cap_validate_bredr_psm(psm);
+		else
+			err = l2cap_validate_le_psm(psm);
+
+		if (err)
+			goto done;
+	}
+
+	bacpy(&chan->src, &la.l2_bdaddr);
+	chan->src_type = la.l2_bdaddr_type;
+
+	if (la.l2_cid)
+		err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid));
+	else
+		err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm);
+
+	if (err < 0)
+		goto done;
+
+	switch (chan->chan_type) {
+	case L2CAP_CHAN_CONN_LESS:
+		if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_3DSP)
+			chan->sec_level = BT_SECURITY_SDP;
+		break;
+	case L2CAP_CHAN_CONN_ORIENTED:
+		if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_SDP ||
+		    __le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM)
+			chan->sec_level = BT_SECURITY_SDP;
+		break;
+	case L2CAP_CHAN_RAW:
+		chan->sec_level = BT_SECURITY_SDP;
+		break;
+	case L2CAP_CHAN_FIXED:
+		/* Fixed channels default to the L2CAP core not holding a
+		 * hci_conn reference for them. For fixed channels mapping to
+		 * L2CAP sockets we do want to hold a reference so set the
+		 * appropriate flag to request it.
+		 */
+		set_bit(FLAG_HOLD_HCI_CONN, &chan->flags);
+		break;
+	}
+
+	/* Use L2CAP_MODE_LE_FLOWCTL (CoC) in case of LE address and
+	 * L2CAP_MODE_EXT_FLOWCTL (ECRED) has not been set.
+	 */
+	if (chan->psm && bdaddr_type_is_le(chan->src_type) &&
+	    chan->mode != L2CAP_MODE_EXT_FLOWCTL)
+		chan->mode = L2CAP_MODE_LE_FLOWCTL;
+
+	chan->state = BT_BOUND;
+	sk->sk_state = BT_BOUND;
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static void l2cap_sock_init_pid(struct sock *sk)
+{
+	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+
+	/* Only L2CAP_MODE_EXT_FLOWCTL ever need to access the PID in order to
+	 * group the channels being requested.
+	 */
+	if (chan->mode != L2CAP_MODE_EXT_FLOWCTL)
+		return;
+
+	spin_lock(&sk->sk_peer_lock);
+	sk->sk_peer_pid = get_pid(task_tgid(current));
+	spin_unlock(&sk->sk_peer_lock);
+}
+
+static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr,
+			      int alen, int flags)
+{
+	struct sock *sk = sock->sk;
+	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+	struct sockaddr_l2 la;
+	int len, err = 0;
+	bool zapped;
+
+	BT_DBG("sk %p", sk);
+
+	lock_sock(sk);
+	zapped = sock_flag(sk, SOCK_ZAPPED);
+	release_sock(sk);
+
+	if (zapped)
+		return -EINVAL;
+
+	if (!addr || alen < offsetofend(struct sockaddr, sa_family) ||
+	    addr->sa_family != AF_BLUETOOTH)
+		return -EINVAL;
+
+	memset(&la, 0, sizeof(la));
+	len = min_t(unsigned int, sizeof(la), alen);
+	memcpy(&la, addr, len);
+
+	if (la.l2_cid && la.l2_psm)
+		return -EINVAL;
+
+	if (!bdaddr_type_is_valid(la.l2_bdaddr_type))
+		return -EINVAL;
+
+	/* Check that the socket wasn't bound to something that
+	 * conflicts with the address given to connect(). If chan->src
+	 * is BDADDR_ANY it means bind() was never used, in which case
+	 * chan->src_type and la.l2_bdaddr_type do not need to match.
+	 */
+	if (chan->src_type == BDADDR_BREDR && bacmp(&chan->src, BDADDR_ANY) &&
+	    bdaddr_type_is_le(la.l2_bdaddr_type)) {
+		/* Old user space versions will try to incorrectly bind
+		 * the ATT socket using BDADDR_BREDR. We need to accept
+		 * this and fix up the source address type only when
+		 * both the source CID and destination CID indicate
+		 * ATT. Anything else is an invalid combination.
+		 */
+		if (chan->scid != L2CAP_CID_ATT ||
+		    la.l2_cid != cpu_to_le16(L2CAP_CID_ATT))
+			return -EINVAL;
+
+		/* We don't have the hdev available here to make a
+		 * better decision on random vs public, but since all
+		 * user space versions that exhibit this issue anyway do
+		 * not support random local addresses assuming public
+		 * here is good enough.
+		 */
+		chan->src_type = BDADDR_LE_PUBLIC;
+	}
+
+	if (chan->src_type != BDADDR_BREDR && la.l2_bdaddr_type == BDADDR_BREDR)
+		return -EINVAL;
+
+	if (bdaddr_type_is_le(la.l2_bdaddr_type)) {
+		/* We only allow ATT user space socket */
+		if (la.l2_cid &&
+		    la.l2_cid != cpu_to_le16(L2CAP_CID_ATT))
+			return -EINVAL;
+	}
+
+	/* Use L2CAP_MODE_LE_FLOWCTL (CoC) in case of LE address and
+	 * L2CAP_MODE_EXT_FLOWCTL (ECRED) has not been set.
+	 */
+	if (chan->psm && bdaddr_type_is_le(chan->src_type) &&
+	    chan->mode != L2CAP_MODE_EXT_FLOWCTL)
+		chan->mode = L2CAP_MODE_LE_FLOWCTL;
+
+	l2cap_sock_init_pid(sk);
+
+	err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid),
+				 &la.l2_bdaddr, la.l2_bdaddr_type);
+	if (err)
+		return err;
+
+	lock_sock(sk);
+
+	err = bt_sock_wait_state(sk, BT_CONNECTED,
+				 sock_sndtimeo(sk, flags & O_NONBLOCK));
+
+	release_sock(sk);
+
+	return err;
+}
+
+static int l2cap_sock_listen(struct socket *sock, int backlog)
+{
+	struct sock *sk = sock->sk;
+	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+	int err = 0;
+
+	BT_DBG("sk %p backlog %d", sk, backlog);
+
+	lock_sock(sk);
+
+	if (sk->sk_state != BT_BOUND) {
+		err = -EBADFD;
+		goto done;
+	}
+
+	if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	switch (chan->mode) {
+	case L2CAP_MODE_BASIC:
+	case L2CAP_MODE_LE_FLOWCTL:
+		break;
+	case L2CAP_MODE_EXT_FLOWCTL:
+		if (!enable_ecred) {
+			err = -EOPNOTSUPP;
+			goto done;
+		}
+		break;
+	case L2CAP_MODE_ERTM:
+	case L2CAP_MODE_STREAMING:
+		if (!disable_ertm)
+			break;
+		fallthrough;
+	default:
+		err = -EOPNOTSUPP;
+		goto done;
+	}
+
+	l2cap_sock_init_pid(sk);
+
+	sk->sk_max_ack_backlog = backlog;
+	sk->sk_ack_backlog = 0;
+
+	/* Listening channels need to use nested locking in order not to
+	 * cause lockdep warnings when the created child channels end up
+	 * being locked in the same thread as the parent channel.
+	 */
+	atomic_set(&chan->nesting, L2CAP_NESTING_PARENT);
+
+	chan->state = BT_LISTEN;
+	sk->sk_state = BT_LISTEN;
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static int l2cap_sock_accept(struct socket *sock, struct socket *newsock,
+			     int flags, bool kern)
+{
+	DEFINE_WAIT_FUNC(wait, woken_wake_function);
+	struct sock *sk = sock->sk, *nsk;
+	long timeo;
+	int err = 0;
+
+	lock_sock_nested(sk, L2CAP_NESTING_PARENT);
+
+	timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
+
+	BT_DBG("sk %p timeo %ld", sk, timeo);
+
+	/* Wait for an incoming connection. (wake-one). */
+	add_wait_queue_exclusive(sk_sleep(sk), &wait);
+	while (1) {
+		if (sk->sk_state != BT_LISTEN) {
+			err = -EBADFD;
+			break;
+		}
+
+		nsk = bt_accept_dequeue(sk, newsock);
+		if (nsk)
+			break;
+
+		if (!timeo) {
+			err = -EAGAIN;
+			break;
+		}
+
+		if (signal_pending(current)) {
+			err = sock_intr_errno(timeo);
+			break;
+		}
+
+		release_sock(sk);
+
+		timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
+
+		lock_sock_nested(sk, L2CAP_NESTING_PARENT);
+	}
+	remove_wait_queue(sk_sleep(sk), &wait);
+
+	if (err)
+		goto done;
+
+	newsock->state = SS_CONNECTED;
+
+	BT_DBG("new socket %p", nsk);
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr,
+			      int peer)
+{
+	struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr;
+	struct sock *sk = sock->sk;
+	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	if (peer && sk->sk_state != BT_CONNECTED &&
+	    sk->sk_state != BT_CONNECT && sk->sk_state != BT_CONNECT2 &&
+	    sk->sk_state != BT_CONFIG)
+		return -ENOTCONN;
+
+	memset(la, 0, sizeof(struct sockaddr_l2));
+	addr->sa_family = AF_BLUETOOTH;
+
+	la->l2_psm = chan->psm;
+
+	if (peer) {
+		bacpy(&la->l2_bdaddr, &chan->dst);
+		la->l2_cid = cpu_to_le16(chan->dcid);
+		la->l2_bdaddr_type = chan->dst_type;
+	} else {
+		bacpy(&la->l2_bdaddr, &chan->src);
+		la->l2_cid = cpu_to_le16(chan->scid);
+		la->l2_bdaddr_type = chan->src_type;
+	}
+
+	return sizeof(struct sockaddr_l2);
+}
+
+static int l2cap_get_mode(struct l2cap_chan *chan)
+{
+	switch (chan->mode) {
+	case L2CAP_MODE_BASIC:
+		return BT_MODE_BASIC;
+	case L2CAP_MODE_ERTM:
+		return BT_MODE_ERTM;
+	case L2CAP_MODE_STREAMING:
+		return BT_MODE_STREAMING;
+	case L2CAP_MODE_LE_FLOWCTL:
+		return BT_MODE_LE_FLOWCTL;
+	case L2CAP_MODE_EXT_FLOWCTL:
+		return BT_MODE_EXT_FLOWCTL;
+	}
+
+	return -EINVAL;
+}
+
+static int l2cap_sock_getsockopt_old(struct socket *sock, int optname,
+				     char __user *optval, int __user *optlen)
+{
+	struct sock *sk = sock->sk;
+	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+	struct l2cap_options opts;
+	struct l2cap_conninfo cinfo;
+	int len, err = 0;
+	u32 opt;
+
+	BT_DBG("sk %p", sk);
+
+	if (get_user(len, optlen))
+		return -EFAULT;
+
+	lock_sock(sk);
+
+	switch (optname) {
+	case L2CAP_OPTIONS:
+		/* LE sockets should use BT_SNDMTU/BT_RCVMTU, but since
+		 * legacy ATT code depends on getsockopt for
+		 * L2CAP_OPTIONS we need to let this pass.
+		 */
+		if (bdaddr_type_is_le(chan->src_type) &&
+		    chan->scid != L2CAP_CID_ATT) {
+			err = -EINVAL;
+			break;
+		}
+
+		/* Only BR/EDR modes are supported here */
+		switch (chan->mode) {
+		case L2CAP_MODE_BASIC:
+		case L2CAP_MODE_ERTM:
+		case L2CAP_MODE_STREAMING:
+			break;
+		default:
+			err = -EINVAL;
+			break;
+		}
+
+		if (err < 0)
+			break;
+
+		memset(&opts, 0, sizeof(opts));
+		opts.imtu     = chan->imtu;
+		opts.omtu     = chan->omtu;
+		opts.flush_to = chan->flush_to;
+		opts.mode     = chan->mode;
+		opts.fcs      = chan->fcs;
+		opts.max_tx   = chan->max_tx;
+		opts.txwin_size = chan->tx_win;
+
+		BT_DBG("mode 0x%2.2x", chan->mode);
+
+		len = min_t(unsigned int, len, sizeof(opts));
+		if (copy_to_user(optval, (char *) &opts, len))
+			err = -EFAULT;
+
+		break;
+
+	case L2CAP_LM:
+		switch (chan->sec_level) {
+		case BT_SECURITY_LOW:
+			opt = L2CAP_LM_AUTH;
+			break;
+		case BT_SECURITY_MEDIUM:
+			opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT;
+			break;
+		case BT_SECURITY_HIGH:
+			opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT |
+			      L2CAP_LM_SECURE;
+			break;
+		case BT_SECURITY_FIPS:
+			opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT |
+			      L2CAP_LM_SECURE | L2CAP_LM_FIPS;
+			break;
+		default:
+			opt = 0;
+			break;
+		}
+
+		if (test_bit(FLAG_ROLE_SWITCH, &chan->flags))
+			opt |= L2CAP_LM_MASTER;
+
+		if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags))
+			opt |= L2CAP_LM_RELIABLE;
+
+		if (put_user(opt, (u32 __user *) optval))
+			err = -EFAULT;
+
+		break;
+
+	case L2CAP_CONNINFO:
+		if (sk->sk_state != BT_CONNECTED &&
+		    !(sk->sk_state == BT_CONNECT2 &&
+		      test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
+			err = -ENOTCONN;
+			break;
+		}
+
+		memset(&cinfo, 0, sizeof(cinfo));
+		cinfo.hci_handle = chan->conn->hcon->handle;
+		memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3);
+
+		len = min_t(unsigned int, len, sizeof(cinfo));
+		if (copy_to_user(optval, (char *) &cinfo, len))
+			err = -EFAULT;
+
+		break;
+
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+	release_sock(sk);
+	return err;
+}
+
+static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname,
+				 char __user *optval, int __user *optlen)
+{
+	struct sock *sk = sock->sk;
+	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+	struct bt_security sec;
+	struct bt_power pwr;
+	u32 phys;
+	int len, mode, err = 0;
+
+	BT_DBG("sk %p", sk);
+
+	if (level == SOL_L2CAP)
+		return l2cap_sock_getsockopt_old(sock, optname, optval, optlen);
+
+	if (level != SOL_BLUETOOTH)
+		return -ENOPROTOOPT;
+
+	if (get_user(len, optlen))
+		return -EFAULT;
+
+	lock_sock(sk);
+
+	switch (optname) {
+	case BT_SECURITY:
+		if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED &&
+		    chan->chan_type != L2CAP_CHAN_FIXED &&
+		    chan->chan_type != L2CAP_CHAN_RAW) {
+			err = -EINVAL;
+			break;
+		}
+
+		memset(&sec, 0, sizeof(sec));
+		if (chan->conn) {
+			sec.level = chan->conn->hcon->sec_level;
+
+			if (sk->sk_state == BT_CONNECTED)
+				sec.key_size = chan->conn->hcon->enc_key_size;
+		} else {
+			sec.level = chan->sec_level;
+		}
+
+		len = min_t(unsigned int, len, sizeof(sec));
+		if (copy_to_user(optval, (char *) &sec, len))
+			err = -EFAULT;
+
+		break;
+
+	case BT_DEFER_SETUP:
+		if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
+			     (u32 __user *) optval))
+			err = -EFAULT;
+
+		break;
+
+	case BT_FLUSHABLE:
+		if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags),
+			     (u32 __user *) optval))
+			err = -EFAULT;
+
+		break;
+
+	case BT_POWER:
+		if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM
+		    && sk->sk_type != SOCK_RAW) {
+			err = -EINVAL;
+			break;
+		}
+
+		pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags);
+
+		len = min_t(unsigned int, len, sizeof(pwr));
+		if (copy_to_user(optval, (char *) &pwr, len))
+			err = -EFAULT;
+
+		break;
+
+	case BT_CHANNEL_POLICY:
+		if (put_user(chan->chan_policy, (u32 __user *) optval))
+			err = -EFAULT;
+		break;
+
+	case BT_SNDMTU:
+		if (!bdaddr_type_is_le(chan->src_type)) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (sk->sk_state != BT_CONNECTED) {
+			err = -ENOTCONN;
+			break;
+		}
+
+		if (put_user(chan->omtu, (u16 __user *) optval))
+			err = -EFAULT;
+		break;
+
+	case BT_RCVMTU:
+		if (!bdaddr_type_is_le(chan->src_type)) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (put_user(chan->imtu, (u16 __user *) optval))
+			err = -EFAULT;
+		break;
+
+	case BT_PHY:
+		if (sk->sk_state != BT_CONNECTED) {
+			err = -ENOTCONN;
+			break;
+		}
+
+		phys = hci_conn_get_phy(chan->conn->hcon);
+
+		if (put_user(phys, (u32 __user *) optval))
+			err = -EFAULT;
+		break;
+
+	case BT_MODE:
+		if (!enable_ecred) {
+			err = -ENOPROTOOPT;
+			break;
+		}
+
+		if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
+			err = -EINVAL;
+			break;
+		}
+
+		mode = l2cap_get_mode(chan);
+		if (mode < 0) {
+			err = mode;
+			break;
+		}
+
+		if (put_user(mode, (u8 __user *) optval))
+			err = -EFAULT;
+		break;
+
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+	release_sock(sk);
+	return err;
+}
+
+static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu)
+{
+	switch (chan->scid) {
+	case L2CAP_CID_ATT:
+		if (mtu < L2CAP_LE_MIN_MTU)
+			return false;
+		break;
+
+	default:
+		if (mtu < L2CAP_DEFAULT_MIN_MTU)
+			return false;
+	}
+
+	return true;
+}
+
+static int l2cap_sock_setsockopt_old(struct socket *sock, int optname,
+				     sockptr_t optval, unsigned int optlen)
+{
+	struct sock *sk = sock->sk;
+	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+	struct l2cap_options opts;
+	int len, err = 0;
+	u32 opt;
+
+	BT_DBG("sk %p", sk);
+
+	lock_sock(sk);
+
+	switch (optname) {
+	case L2CAP_OPTIONS:
+		if (bdaddr_type_is_le(chan->src_type)) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (sk->sk_state == BT_CONNECTED) {
+			err = -EINVAL;
+			break;
+		}
+
+		opts.imtu     = chan->imtu;
+		opts.omtu     = chan->omtu;
+		opts.flush_to = chan->flush_to;
+		opts.mode     = chan->mode;
+		opts.fcs      = chan->fcs;
+		opts.max_tx   = chan->max_tx;
+		opts.txwin_size = chan->tx_win;
+
+		len = min_t(unsigned int, sizeof(opts), optlen);
+		if (copy_from_sockptr(&opts, optval, len)) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (!l2cap_valid_mtu(chan, opts.imtu)) {
+			err = -EINVAL;
+			break;
+		}
+
+		/* Only BR/EDR modes are supported here */
+		switch (opts.mode) {
+		case L2CAP_MODE_BASIC:
+			clear_bit(CONF_STATE2_DEVICE, &chan->conf_state);
+			break;
+		case L2CAP_MODE_ERTM:
+		case L2CAP_MODE_STREAMING:
+			if (!disable_ertm)
+				break;
+			fallthrough;
+		default:
+			err = -EINVAL;
+			break;
+		}
+
+		if (err < 0)
+			break;
+
+		chan->mode = opts.mode;
+
+		BT_DBG("mode 0x%2.2x", chan->mode);
+
+		chan->imtu = opts.imtu;
+		chan->omtu = opts.omtu;
+		chan->fcs  = opts.fcs;
+		chan->max_tx = opts.max_tx;
+		chan->tx_win = opts.txwin_size;
+		chan->flush_to = opts.flush_to;
+		break;
+
+	case L2CAP_LM:
+		if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (opt & L2CAP_LM_FIPS) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (opt & L2CAP_LM_AUTH)
+			chan->sec_level = BT_SECURITY_LOW;
+		if (opt & L2CAP_LM_ENCRYPT)
+			chan->sec_level = BT_SECURITY_MEDIUM;
+		if (opt & L2CAP_LM_SECURE)
+			chan->sec_level = BT_SECURITY_HIGH;
+
+		if (opt & L2CAP_LM_MASTER)
+			set_bit(FLAG_ROLE_SWITCH, &chan->flags);
+		else
+			clear_bit(FLAG_ROLE_SWITCH, &chan->flags);
+
+		if (opt & L2CAP_LM_RELIABLE)
+			set_bit(FLAG_FORCE_RELIABLE, &chan->flags);
+		else
+			clear_bit(FLAG_FORCE_RELIABLE, &chan->flags);
+		break;
+
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+	release_sock(sk);
+	return err;
+}
+
+static int l2cap_set_mode(struct l2cap_chan *chan, u8 mode)
+{
+	switch (mode) {
+	case BT_MODE_BASIC:
+		if (bdaddr_type_is_le(chan->src_type))
+			return -EINVAL;
+		mode = L2CAP_MODE_BASIC;
+		clear_bit(CONF_STATE2_DEVICE, &chan->conf_state);
+		break;
+	case BT_MODE_ERTM:
+		if (!disable_ertm || bdaddr_type_is_le(chan->src_type))
+			return -EINVAL;
+		mode = L2CAP_MODE_ERTM;
+		break;
+	case BT_MODE_STREAMING:
+		if (!disable_ertm || bdaddr_type_is_le(chan->src_type))
+			return -EINVAL;
+		mode = L2CAP_MODE_STREAMING;
+		break;
+	case BT_MODE_LE_FLOWCTL:
+		if (!bdaddr_type_is_le(chan->src_type))
+			return -EINVAL;
+		mode = L2CAP_MODE_LE_FLOWCTL;
+		break;
+	case BT_MODE_EXT_FLOWCTL:
+		/* TODO: Add support for ECRED PDUs to BR/EDR */
+		if (!bdaddr_type_is_le(chan->src_type))
+			return -EINVAL;
+		mode = L2CAP_MODE_EXT_FLOWCTL;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	chan->mode = mode;
+
+	return 0;
+}
+
+static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname,
+				 sockptr_t optval, unsigned int optlen)
+{
+	struct sock *sk = sock->sk;
+	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+	struct bt_security sec;
+	struct bt_power pwr;
+	struct l2cap_conn *conn;
+	int len, err = 0;
+	u32 opt;
+	u16 mtu;
+	u8 mode;
+
+	BT_DBG("sk %p", sk);
+
+	if (level == SOL_L2CAP)
+		return l2cap_sock_setsockopt_old(sock, optname, optval, optlen);
+
+	if (level != SOL_BLUETOOTH)
+		return -ENOPROTOOPT;
+
+	lock_sock(sk);
+
+	switch (optname) {
+	case BT_SECURITY:
+		if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED &&
+		    chan->chan_type != L2CAP_CHAN_FIXED &&
+		    chan->chan_type != L2CAP_CHAN_RAW) {
+			err = -EINVAL;
+			break;
+		}
+
+		sec.level = BT_SECURITY_LOW;
+
+		len = min_t(unsigned int, sizeof(sec), optlen);
+		if (copy_from_sockptr(&sec, optval, len)) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (sec.level < BT_SECURITY_LOW ||
+		    sec.level > BT_SECURITY_FIPS) {
+			err = -EINVAL;
+			break;
+		}
+
+		chan->sec_level = sec.level;
+
+		if (!chan->conn)
+			break;
+
+		conn = chan->conn;
+
+		/* change security for LE channels */
+		if (chan->scid == L2CAP_CID_ATT) {
+			if (smp_conn_security(conn->hcon, sec.level)) {
+				err = -EINVAL;
+				break;
+			}
+
+			set_bit(FLAG_PENDING_SECURITY, &chan->flags);
+			sk->sk_state = BT_CONFIG;
+			chan->state = BT_CONFIG;
+
+		/* or for ACL link */
+		} else if ((sk->sk_state == BT_CONNECT2 &&
+			    test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) ||
+			   sk->sk_state == BT_CONNECTED) {
+			if (!l2cap_chan_check_security(chan, true))
+				set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags);
+			else
+				sk->sk_state_change(sk);
+		} else {
+			err = -EINVAL;
+		}
+		break;
+
+	case BT_DEFER_SETUP:
+		if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (opt) {
+			set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
+			set_bit(FLAG_DEFER_SETUP, &chan->flags);
+		} else {
+			clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
+			clear_bit(FLAG_DEFER_SETUP, &chan->flags);
+		}
+		break;
+
+	case BT_FLUSHABLE:
+		if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (opt > BT_FLUSHABLE_ON) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (opt == BT_FLUSHABLE_OFF) {
+			conn = chan->conn;
+			/* proceed further only when we have l2cap_conn and
+			   No Flush support in the LM */
+			if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) {
+				err = -EINVAL;
+				break;
+			}
+		}
+
+		if (opt)
+			set_bit(FLAG_FLUSHABLE, &chan->flags);
+		else
+			clear_bit(FLAG_FLUSHABLE, &chan->flags);
+		break;
+
+	case BT_POWER:
+		if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED &&
+		    chan->chan_type != L2CAP_CHAN_RAW) {
+			err = -EINVAL;
+			break;
+		}
+
+		pwr.force_active = BT_POWER_FORCE_ACTIVE_ON;
+
+		len = min_t(unsigned int, sizeof(pwr), optlen);
+		if (copy_from_sockptr(&pwr, optval, len)) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (pwr.force_active)
+			set_bit(FLAG_FORCE_ACTIVE, &chan->flags);
+		else
+			clear_bit(FLAG_FORCE_ACTIVE, &chan->flags);
+		break;
+
+	case BT_CHANNEL_POLICY:
+		if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (chan->mode != L2CAP_MODE_ERTM &&
+		    chan->mode != L2CAP_MODE_STREAMING) {
+			err = -EOPNOTSUPP;
+			break;
+		}
+
+		chan->chan_policy = (u8) opt;
+
+		if (sk->sk_state == BT_CONNECTED &&
+		    chan->move_role == L2CAP_MOVE_ROLE_NONE)
+			l2cap_move_start(chan);
+
+		break;
+
+	case BT_SNDMTU:
+		if (!bdaddr_type_is_le(chan->src_type)) {
+			err = -EINVAL;
+			break;
+		}
+
+		/* Setting is not supported as it's the remote side that
+		 * decides this.
+		 */
+		err = -EPERM;
+		break;
+
+	case BT_RCVMTU:
+		if (!bdaddr_type_is_le(chan->src_type)) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (chan->mode == L2CAP_MODE_LE_FLOWCTL &&
+		    sk->sk_state == BT_CONNECTED) {
+			err = -EISCONN;
+			break;
+		}
+
+		if (copy_from_sockptr(&mtu, optval, sizeof(u16))) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (chan->mode == L2CAP_MODE_EXT_FLOWCTL &&
+		    sk->sk_state == BT_CONNECTED)
+			err = l2cap_chan_reconfigure(chan, mtu);
+		else
+			chan->imtu = mtu;
+
+		break;
+
+	case BT_MODE:
+		if (!enable_ecred) {
+			err = -ENOPROTOOPT;
+			break;
+		}
+
+		BT_DBG("sk->sk_state %u", sk->sk_state);
+
+		if (sk->sk_state != BT_BOUND) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (copy_from_sockptr(&mode, optval, sizeof(u8))) {
+			err = -EFAULT;
+			break;
+		}
+
+		BT_DBG("mode %u", mode);
+
+		err = l2cap_set_mode(chan, mode);
+		if (err)
+			break;
+
+		BT_DBG("mode 0x%2.2x", chan->mode);
+
+		break;
+
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+	release_sock(sk);
+	return err;
+}
+
+static int l2cap_sock_sendmsg(struct socket *sock, struct msghdr *msg,
+			      size_t len)
+{
+	struct sock *sk = sock->sk;
+	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+	int err;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	err = sock_error(sk);
+	if (err)
+		return err;
+
+	if (msg->msg_flags & MSG_OOB)
+		return -EOPNOTSUPP;
+
+	if (sk->sk_state != BT_CONNECTED)
+		return -ENOTCONN;
+
+	lock_sock(sk);
+	err = bt_sock_wait_ready(sk, msg->msg_flags);
+	release_sock(sk);
+	if (err)
+		return err;
+
+	l2cap_chan_lock(chan);
+	err = l2cap_chan_send(chan, msg, len);
+	l2cap_chan_unlock(chan);
+
+	return err;
+}
+
+static int l2cap_sock_recvmsg(struct socket *sock, struct msghdr *msg,
+			      size_t len, int flags)
+{
+	struct sock *sk = sock->sk;
+	struct l2cap_pinfo *pi = l2cap_pi(sk);
+	int err;
+
+	lock_sock(sk);
+
+	if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP,
+						    &bt_sk(sk)->flags)) {
+		if (pi->chan->mode == L2CAP_MODE_EXT_FLOWCTL) {
+			sk->sk_state = BT_CONNECTED;
+			pi->chan->state = BT_CONNECTED;
+			__l2cap_ecred_conn_rsp_defer(pi->chan);
+		} else if (bdaddr_type_is_le(pi->chan->src_type)) {
+			sk->sk_state = BT_CONNECTED;
+			pi->chan->state = BT_CONNECTED;
+			__l2cap_le_connect_rsp_defer(pi->chan);
+		} else {
+			sk->sk_state = BT_CONFIG;
+			pi->chan->state = BT_CONFIG;
+			__l2cap_connect_rsp_defer(pi->chan);
+		}
+
+		err = 0;
+		goto done;
+	}
+
+	release_sock(sk);
+
+	if (sock->type == SOCK_STREAM)
+		err = bt_sock_stream_recvmsg(sock, msg, len, flags);
+	else
+		err = bt_sock_recvmsg(sock, msg, len, flags);
+
+	if (pi->chan->mode != L2CAP_MODE_ERTM)
+		return err;
+
+	/* Attempt to put pending rx data in the socket buffer */
+
+	lock_sock(sk);
+
+	if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state))
+		goto done;
+
+	if (pi->rx_busy_skb) {
+		if (!__sock_queue_rcv_skb(sk, pi->rx_busy_skb))
+			pi->rx_busy_skb = NULL;
+		else
+			goto done;
+	}
+
+	/* Restore data flow when half of the receive buffer is
+	 * available.  This avoids resending large numbers of
+	 * frames.
+	 */
+	if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1)
+		l2cap_chan_busy(pi->chan, 0);
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+/* Kill socket (only if zapped and orphan)
+ * Must be called on unlocked socket, with l2cap channel lock.
+ */
+static void l2cap_sock_kill(struct sock *sk)
+{
+	if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
+		return;
+
+	BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state));
+
+	/* Kill poor orphan */
+
+	l2cap_chan_put(l2cap_pi(sk)->chan);
+	sock_set_flag(sk, SOCK_DEAD);
+	sock_put(sk);
+}
+
+static int __l2cap_wait_ack(struct sock *sk, struct l2cap_chan *chan)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	int err = 0;
+	int timeo = L2CAP_WAIT_ACK_POLL_PERIOD;
+	/* Timeout to prevent infinite loop */
+	unsigned long timeout = jiffies + L2CAP_WAIT_ACK_TIMEOUT;
+
+	add_wait_queue(sk_sleep(sk), &wait);
+	set_current_state(TASK_INTERRUPTIBLE);
+	do {
+		BT_DBG("Waiting for %d ACKs, timeout %04d ms",
+		       chan->unacked_frames, time_after(jiffies, timeout) ? 0 :
+		       jiffies_to_msecs(timeout - jiffies));
+
+		if (!timeo)
+			timeo = L2CAP_WAIT_ACK_POLL_PERIOD;
+
+		if (signal_pending(current)) {
+			err = sock_intr_errno(timeo);
+			break;
+		}
+
+		release_sock(sk);
+		timeo = schedule_timeout(timeo);
+		lock_sock(sk);
+		set_current_state(TASK_INTERRUPTIBLE);
+
+		err = sock_error(sk);
+		if (err)
+			break;
+
+		if (time_after(jiffies, timeout)) {
+			err = -ENOLINK;
+			break;
+		}
+
+	} while (chan->unacked_frames > 0 &&
+		 chan->state == BT_CONNECTED);
+
+	set_current_state(TASK_RUNNING);
+	remove_wait_queue(sk_sleep(sk), &wait);
+	return err;
+}
+
+static int l2cap_sock_shutdown(struct socket *sock, int how)
+{
+	struct sock *sk = sock->sk;
+	struct l2cap_chan *chan;
+	struct l2cap_conn *conn;
+	int err = 0;
+
+	BT_DBG("sock %p, sk %p, how %d", sock, sk, how);
+
+	/* 'how' parameter is mapped to sk_shutdown as follows:
+	 * SHUT_RD   (0) --> RCV_SHUTDOWN  (1)
+	 * SHUT_WR   (1) --> SEND_SHUTDOWN (2)
+	 * SHUT_RDWR (2) --> SHUTDOWN_MASK (3)
+	 */
+	how++;
+
+	if (!sk)
+		return 0;
+
+	lock_sock(sk);
+
+	if ((sk->sk_shutdown & how) == how)
+		goto shutdown_already;
+
+	BT_DBG("Handling sock shutdown");
+
+	/* prevent sk structure from being freed whilst unlocked */
+	sock_hold(sk);
+
+	chan = l2cap_pi(sk)->chan;
+	/* prevent chan structure from being freed whilst unlocked */
+	l2cap_chan_hold(chan);
+
+	BT_DBG("chan %p state %s", chan, state_to_string(chan->state));
+
+	if (chan->mode == L2CAP_MODE_ERTM &&
+	    chan->unacked_frames > 0 &&
+	    chan->state == BT_CONNECTED) {
+		err = __l2cap_wait_ack(sk, chan);
+
+		/* After waiting for ACKs, check whether shutdown
+		 * has already been actioned to close the L2CAP
+		 * link such as by l2cap_disconnection_req().
+		 */
+		if ((sk->sk_shutdown & how) == how)
+			goto shutdown_matched;
+	}
+
+	/* Try setting the RCV_SHUTDOWN bit, return early if SEND_SHUTDOWN
+	 * is already set
+	 */
+	if ((how & RCV_SHUTDOWN) && !(sk->sk_shutdown & RCV_SHUTDOWN)) {
+		sk->sk_shutdown |= RCV_SHUTDOWN;
+		if ((sk->sk_shutdown & how) == how)
+			goto shutdown_matched;
+	}
+
+	sk->sk_shutdown |= SEND_SHUTDOWN;
+	release_sock(sk);
+
+	l2cap_chan_lock(chan);
+	conn = chan->conn;
+	if (conn)
+		/* prevent conn structure from being freed */
+		l2cap_conn_get(conn);
+	l2cap_chan_unlock(chan);
+
+	if (conn)
+		/* mutex lock must be taken before l2cap_chan_lock() */
+		mutex_lock(&conn->chan_lock);
+
+	l2cap_chan_lock(chan);
+	l2cap_chan_close(chan, 0);
+	l2cap_chan_unlock(chan);
+
+	if (conn) {
+		mutex_unlock(&conn->chan_lock);
+		l2cap_conn_put(conn);
+	}
+
+	lock_sock(sk);
+
+	if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
+	    !(current->flags & PF_EXITING))
+		err = bt_sock_wait_state(sk, BT_CLOSED,
+					 sk->sk_lingertime);
+
+shutdown_matched:
+	l2cap_chan_put(chan);
+	sock_put(sk);
+
+shutdown_already:
+	if (!err && sk->sk_err)
+		err = -sk->sk_err;
+
+	release_sock(sk);
+
+	BT_DBG("Sock shutdown complete err: %d", err);
+
+	return err;
+}
+
+static int l2cap_sock_release(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+	int err;
+	struct l2cap_chan *chan;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	if (!sk)
+		return 0;
+
+	l2cap_sock_cleanup_listen(sk);
+	bt_sock_unlink(&l2cap_sk_list, sk);
+
+	err = l2cap_sock_shutdown(sock, SHUT_RDWR);
+	chan = l2cap_pi(sk)->chan;
+
+	l2cap_chan_hold(chan);
+	l2cap_chan_lock(chan);
+
+	sock_orphan(sk);
+	l2cap_sock_kill(sk);
+
+	l2cap_chan_unlock(chan);
+	l2cap_chan_put(chan);
+
+	return err;
+}
+
+static void l2cap_sock_cleanup_listen(struct sock *parent)
+{
+	struct sock *sk;
+
+	BT_DBG("parent %p state %s", parent,
+	       state_to_string(parent->sk_state));
+
+	/* Close not yet accepted channels */
+	while ((sk = bt_accept_dequeue(parent, NULL))) {
+		struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+
+		BT_DBG("child chan %p state %s", chan,
+		       state_to_string(chan->state));
+
+		l2cap_chan_hold(chan);
+		l2cap_chan_lock(chan);
+
+		__clear_chan_timer(chan);
+		l2cap_chan_close(chan, ECONNRESET);
+		l2cap_sock_kill(sk);
+
+		l2cap_chan_unlock(chan);
+		l2cap_chan_put(chan);
+	}
+}
+
+static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan)
+{
+	struct sock *sk, *parent = chan->data;
+
+	lock_sock(parent);
+
+	/* Check for backlog size */
+	if (sk_acceptq_is_full(parent)) {
+		BT_DBG("backlog full %d", parent->sk_ack_backlog);
+		release_sock(parent);
+		return NULL;
+	}
+
+	sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP,
+			      GFP_ATOMIC, 0);
+	if (!sk) {
+		release_sock(parent);
+		return NULL;
+        }
+
+	bt_sock_reclassify_lock(sk, BTPROTO_L2CAP);
+
+	l2cap_sock_init(sk, parent);
+
+	bt_accept_enqueue(parent, sk, false);
+
+	release_sock(parent);
+
+	return l2cap_pi(sk)->chan;
+}
+
+static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb)
+{
+	struct sock *sk = chan->data;
+	int err;
+
+	lock_sock(sk);
+
+	if (l2cap_pi(sk)->rx_busy_skb) {
+		err = -ENOMEM;
+		goto done;
+	}
+
+	if (chan->mode != L2CAP_MODE_ERTM &&
+	    chan->mode != L2CAP_MODE_STREAMING) {
+		/* Even if no filter is attached, we could potentially
+		 * get errors from security modules, etc.
+		 */
+		err = sk_filter(sk, skb);
+		if (err)
+			goto done;
+	}
+
+	err = __sock_queue_rcv_skb(sk, skb);
+
+	/* For ERTM, handle one skb that doesn't fit into the recv
+	 * buffer.  This is important to do because the data frames
+	 * have already been acked, so the skb cannot be discarded.
+	 *
+	 * Notify the l2cap core that the buffer is full, so the
+	 * LOCAL_BUSY state is entered and no more frames are
+	 * acked and reassembled until there is buffer space
+	 * available.
+	 */
+	if (err < 0 && chan->mode == L2CAP_MODE_ERTM) {
+		l2cap_pi(sk)->rx_busy_skb = skb;
+		l2cap_chan_busy(chan, 1);
+		err = 0;
+	}
+
+done:
+	release_sock(sk);
+
+	return err;
+}
+
+static void l2cap_sock_close_cb(struct l2cap_chan *chan)
+{
+	struct sock *sk = chan->data;
+
+	if (!sk)
+		return;
+
+	l2cap_sock_kill(sk);
+}
+
+static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err)
+{
+	struct sock *sk = chan->data;
+	struct sock *parent;
+
+	if (!sk)
+		return;
+
+	BT_DBG("chan %p state %s", chan, state_to_string(chan->state));
+
+	/* This callback can be called both for server (BT_LISTEN)
+	 * sockets as well as "normal" ones. To avoid lockdep warnings
+	 * with child socket locking (through l2cap_sock_cleanup_listen)
+	 * we need separation into separate nesting levels. The simplest
+	 * way to accomplish this is to inherit the nesting level used
+	 * for the channel.
+	 */
+	lock_sock_nested(sk, atomic_read(&chan->nesting));
+
+	parent = bt_sk(sk)->parent;
+
+	switch (chan->state) {
+	case BT_OPEN:
+	case BT_BOUND:
+	case BT_CLOSED:
+		break;
+	case BT_LISTEN:
+		l2cap_sock_cleanup_listen(sk);
+		sk->sk_state = BT_CLOSED;
+		chan->state = BT_CLOSED;
+
+		break;
+	default:
+		sk->sk_state = BT_CLOSED;
+		chan->state = BT_CLOSED;
+
+		sk->sk_err = err;
+
+		if (parent) {
+			bt_accept_unlink(sk);
+			parent->sk_data_ready(parent);
+		} else {
+			sk->sk_state_change(sk);
+		}
+
+		break;
+	}
+	release_sock(sk);
+
+	/* Only zap after cleanup to avoid use after free race */
+	sock_set_flag(sk, SOCK_ZAPPED);
+
+}
+
+static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state,
+				       int err)
+{
+	struct sock *sk = chan->data;
+
+	sk->sk_state = state;
+
+	if (err)
+		sk->sk_err = err;
+}
+
+static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan,
+					       unsigned long hdr_len,
+					       unsigned long len, int nb)
+{
+	struct sock *sk = chan->data;
+	struct sk_buff *skb;
+	int err;
+
+	l2cap_chan_unlock(chan);
+	skb = bt_skb_send_alloc(sk, hdr_len + len, nb, &err);
+	l2cap_chan_lock(chan);
+
+	if (!skb)
+		return ERR_PTR(err);
+
+	/* Channel lock is released before requesting new skb and then
+	 * reacquired thus we need to recheck channel state.
+	 */
+	if (chan->state != BT_CONNECTED) {
+		kfree_skb(skb);
+		return ERR_PTR(-ENOTCONN);
+	}
+
+	skb->priority = sk->sk_priority;
+
+	bt_cb(skb)->l2cap.chan = chan;
+
+	return skb;
+}
+
+static void l2cap_sock_ready_cb(struct l2cap_chan *chan)
+{
+	struct sock *sk = chan->data;
+	struct sock *parent;
+
+	lock_sock(sk);
+
+	parent = bt_sk(sk)->parent;
+
+	BT_DBG("sk %p, parent %p", sk, parent);
+
+	sk->sk_state = BT_CONNECTED;
+	sk->sk_state_change(sk);
+
+	if (parent)
+		parent->sk_data_ready(parent);
+
+	release_sock(sk);
+}
+
+static void l2cap_sock_defer_cb(struct l2cap_chan *chan)
+{
+	struct sock *parent, *sk = chan->data;
+
+	lock_sock(sk);
+
+	parent = bt_sk(sk)->parent;
+	if (parent)
+		parent->sk_data_ready(parent);
+
+	release_sock(sk);
+}
+
+static void l2cap_sock_resume_cb(struct l2cap_chan *chan)
+{
+	struct sock *sk = chan->data;
+
+	if (test_and_clear_bit(FLAG_PENDING_SECURITY, &chan->flags)) {
+		sk->sk_state = BT_CONNECTED;
+		chan->state = BT_CONNECTED;
+	}
+
+	clear_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags);
+	sk->sk_state_change(sk);
+}
+
+static void l2cap_sock_set_shutdown_cb(struct l2cap_chan *chan)
+{
+	struct sock *sk = chan->data;
+
+	lock_sock(sk);
+	sk->sk_shutdown = SHUTDOWN_MASK;
+	release_sock(sk);
+}
+
+static long l2cap_sock_get_sndtimeo_cb(struct l2cap_chan *chan)
+{
+	struct sock *sk = chan->data;
+
+	return sk->sk_sndtimeo;
+}
+
+static struct pid *l2cap_sock_get_peer_pid_cb(struct l2cap_chan *chan)
+{
+	struct sock *sk = chan->data;
+
+	return sk->sk_peer_pid;
+}
+
+static void l2cap_sock_suspend_cb(struct l2cap_chan *chan)
+{
+	struct sock *sk = chan->data;
+
+	set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags);
+	sk->sk_state_change(sk);
+}
+
+static int l2cap_sock_filter(struct l2cap_chan *chan, struct sk_buff *skb)
+{
+	struct sock *sk = chan->data;
+
+	switch (chan->mode) {
+	case L2CAP_MODE_ERTM:
+	case L2CAP_MODE_STREAMING:
+		return sk_filter(sk, skb);
+	}
+
+	return 0;
+}
+
+static const struct l2cap_ops l2cap_chan_ops = {
+	.name			= "L2CAP Socket Interface",
+	.new_connection		= l2cap_sock_new_connection_cb,
+	.recv			= l2cap_sock_recv_cb,
+	.close			= l2cap_sock_close_cb,
+	.teardown		= l2cap_sock_teardown_cb,
+	.state_change		= l2cap_sock_state_change_cb,
+	.ready			= l2cap_sock_ready_cb,
+	.defer			= l2cap_sock_defer_cb,
+	.resume			= l2cap_sock_resume_cb,
+	.suspend		= l2cap_sock_suspend_cb,
+	.set_shutdown		= l2cap_sock_set_shutdown_cb,
+	.get_sndtimeo		= l2cap_sock_get_sndtimeo_cb,
+	.get_peer_pid		= l2cap_sock_get_peer_pid_cb,
+	.alloc_skb		= l2cap_sock_alloc_skb_cb,
+	.filter			= l2cap_sock_filter,
+};
+
+static void l2cap_sock_destruct(struct sock *sk)
+{
+	BT_DBG("sk %p", sk);
+
+	if (l2cap_pi(sk)->chan) {
+		l2cap_pi(sk)->chan->data = NULL;
+		l2cap_chan_put(l2cap_pi(sk)->chan);
+	}
+
+	if (l2cap_pi(sk)->rx_busy_skb) {
+		kfree_skb(l2cap_pi(sk)->rx_busy_skb);
+		l2cap_pi(sk)->rx_busy_skb = NULL;
+	}
+
+	skb_queue_purge(&sk->sk_receive_queue);
+	skb_queue_purge(&sk->sk_write_queue);
+}
+
+static void l2cap_skb_msg_name(struct sk_buff *skb, void *msg_name,
+			       int *msg_namelen)
+{
+	DECLARE_SOCKADDR(struct sockaddr_l2 *, la, msg_name);
+
+	memset(la, 0, sizeof(struct sockaddr_l2));
+	la->l2_family = AF_BLUETOOTH;
+	la->l2_psm = bt_cb(skb)->l2cap.psm;
+	bacpy(&la->l2_bdaddr, &bt_cb(skb)->l2cap.bdaddr);
+
+	*msg_namelen = sizeof(struct sockaddr_l2);
+}
+
+static void l2cap_sock_init(struct sock *sk, struct sock *parent)
+{
+	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+
+	BT_DBG("sk %p", sk);
+
+	if (parent) {
+		struct l2cap_chan *pchan = l2cap_pi(parent)->chan;
+
+		sk->sk_type = parent->sk_type;
+		bt_sk(sk)->flags = bt_sk(parent)->flags;
+
+		chan->chan_type = pchan->chan_type;
+		chan->imtu = pchan->imtu;
+		chan->omtu = pchan->omtu;
+		chan->conf_state = pchan->conf_state;
+		chan->mode = pchan->mode;
+		chan->fcs  = pchan->fcs;
+		chan->max_tx = pchan->max_tx;
+		chan->tx_win = pchan->tx_win;
+		chan->tx_win_max = pchan->tx_win_max;
+		chan->sec_level = pchan->sec_level;
+		chan->flags = pchan->flags;
+		chan->tx_credits = pchan->tx_credits;
+		chan->rx_credits = pchan->rx_credits;
+
+		if (chan->chan_type == L2CAP_CHAN_FIXED) {
+			chan->scid = pchan->scid;
+			chan->dcid = pchan->scid;
+		}
+
+		security_sk_clone(parent, sk);
+	} else {
+		switch (sk->sk_type) {
+		case SOCK_RAW:
+			chan->chan_type = L2CAP_CHAN_RAW;
+			break;
+		case SOCK_DGRAM:
+			chan->chan_type = L2CAP_CHAN_CONN_LESS;
+			bt_sk(sk)->skb_msg_name = l2cap_skb_msg_name;
+			break;
+		case SOCK_SEQPACKET:
+		case SOCK_STREAM:
+			chan->chan_type = L2CAP_CHAN_CONN_ORIENTED;
+			break;
+		}
+
+		chan->imtu = L2CAP_DEFAULT_MTU;
+		chan->omtu = 0;
+		if (!disable_ertm && sk->sk_type == SOCK_STREAM) {
+			chan->mode = L2CAP_MODE_ERTM;
+			set_bit(CONF_STATE2_DEVICE, &chan->conf_state);
+		} else {
+			chan->mode = L2CAP_MODE_BASIC;
+		}
+
+		l2cap_chan_set_defaults(chan);
+	}
+
+	/* Default config options */
+	chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;
+
+	chan->data = sk;
+	chan->ops = &l2cap_chan_ops;
+}
+
+static struct proto l2cap_proto = {
+	.name		= "L2CAP",
+	.owner		= THIS_MODULE,
+	.obj_size	= sizeof(struct l2cap_pinfo)
+};
+
+static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock,
+				     int proto, gfp_t prio, int kern)
+{
+	struct sock *sk;
+	struct l2cap_chan *chan;
+
+	sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto, kern);
+	if (!sk)
+		return NULL;
+
+	sock_init_data(sock, sk);
+	INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
+
+	sk->sk_destruct = l2cap_sock_destruct;
+	sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT;
+
+	sock_reset_flag(sk, SOCK_ZAPPED);
+
+	sk->sk_protocol = proto;
+	sk->sk_state = BT_OPEN;
+
+	chan = l2cap_chan_create();
+	if (!chan) {
+		sk_free(sk);
+		return NULL;
+	}
+
+	l2cap_chan_hold(chan);
+
+	l2cap_pi(sk)->chan = chan;
+
+	return sk;
+}
+
+static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol,
+			     int kern)
+{
+	struct sock *sk;
+
+	BT_DBG("sock %p", sock);
+
+	sock->state = SS_UNCONNECTED;
+
+	if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM &&
+	    sock->type != SOCK_DGRAM && sock->type != SOCK_RAW)
+		return -ESOCKTNOSUPPORT;
+
+	if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
+		return -EPERM;
+
+	sock->ops = &l2cap_sock_ops;
+
+	sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
+	if (!sk)
+		return -ENOMEM;
+
+	l2cap_sock_init(sk, NULL);
+	bt_sock_link(&l2cap_sk_list, sk);
+	return 0;
+}
+
+static const struct proto_ops l2cap_sock_ops = {
+	.family		= PF_BLUETOOTH,
+	.owner		= THIS_MODULE,
+	.release	= l2cap_sock_release,
+	.bind		= l2cap_sock_bind,
+	.connect	= l2cap_sock_connect,
+	.listen		= l2cap_sock_listen,
+	.accept		= l2cap_sock_accept,
+	.getname	= l2cap_sock_getname,
+	.sendmsg	= l2cap_sock_sendmsg,
+	.recvmsg	= l2cap_sock_recvmsg,
+	.poll		= bt_sock_poll,
+	.ioctl		= bt_sock_ioctl,
+	.gettstamp	= sock_gettstamp,
+	.mmap		= sock_no_mmap,
+	.socketpair	= sock_no_socketpair,
+	.shutdown	= l2cap_sock_shutdown,
+	.setsockopt	= l2cap_sock_setsockopt,
+	.getsockopt	= l2cap_sock_getsockopt
+};
+
+static const struct net_proto_family l2cap_sock_family_ops = {
+	.family	= PF_BLUETOOTH,
+	.owner	= THIS_MODULE,
+	.create	= l2cap_sock_create,
+};
+
+int __init l2cap_init_sockets(void)
+{
+	int err;
+
+	BUILD_BUG_ON(sizeof(struct sockaddr_l2) > sizeof(struct sockaddr));
+
+	err = proto_register(&l2cap_proto, 0);
+	if (err < 0)
+		return err;
+
+	err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops);
+	if (err < 0) {
+		BT_ERR("L2CAP socket registration failed");
+		goto error;
+	}
+
+	err = bt_procfs_init(&init_net, "l2cap", &l2cap_sk_list,
+			     NULL);
+	if (err < 0) {
+		BT_ERR("Failed to create L2CAP proc file");
+		bt_sock_unregister(BTPROTO_L2CAP);
+		goto error;
+	}
+
+	BT_INFO("L2CAP socket layer initialized");
+
+	return 0;
+
+error:
+	proto_unregister(&l2cap_proto);
+	return err;
+}
+
+void l2cap_cleanup_sockets(void)
+{
+	bt_procfs_cleanup(&init_net, "l2cap");
+	bt_sock_unregister(BTPROTO_L2CAP);
+	proto_unregister(&l2cap_proto);
+}
diff --git a/net/bluetooth/leds.c b/net/bluetooth/leds.c
new file mode 100644
index 000000000..f46847632
--- /dev/null
+++ b/net/bluetooth/leds.c
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2015, Heiner Kallweit <hkallweit1@gmail.com>
+ */
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "leds.h"
+
+DEFINE_LED_TRIGGER(bt_power_led_trigger);
+
+struct hci_basic_led_trigger {
+	struct led_trigger	led_trigger;
+	struct hci_dev		*hdev;
+};
+
+#define to_hci_basic_led_trigger(arg) container_of(arg, \
+			struct hci_basic_led_trigger, led_trigger)
+
+void hci_leds_update_powered(struct hci_dev *hdev, bool enabled)
+{
+	if (hdev->power_led)
+		led_trigger_event(hdev->power_led,
+				  enabled ? LED_FULL : LED_OFF);
+
+	if (!enabled) {
+		struct hci_dev *d;
+
+		read_lock(&hci_dev_list_lock);
+
+		list_for_each_entry(d, &hci_dev_list, list) {
+			if (test_bit(HCI_UP, &d->flags))
+				enabled = true;
+		}
+
+		read_unlock(&hci_dev_list_lock);
+	}
+
+	led_trigger_event(bt_power_led_trigger, enabled ? LED_FULL : LED_OFF);
+}
+
+static int power_activate(struct led_classdev *led_cdev)
+{
+	struct hci_basic_led_trigger *htrig;
+	bool powered;
+
+	htrig = to_hci_basic_led_trigger(led_cdev->trigger);
+	powered = test_bit(HCI_UP, &htrig->hdev->flags);
+
+	led_trigger_event(led_cdev->trigger, powered ? LED_FULL : LED_OFF);
+
+	return 0;
+}
+
+static struct led_trigger *led_allocate_basic(struct hci_dev *hdev,
+			int (*activate)(struct led_classdev *led_cdev),
+			const char *name)
+{
+	struct hci_basic_led_trigger *htrig;
+
+	htrig =	devm_kzalloc(&hdev->dev, sizeof(*htrig), GFP_KERNEL);
+	if (!htrig)
+		return NULL;
+
+	htrig->hdev = hdev;
+	htrig->led_trigger.activate = activate;
+	htrig->led_trigger.name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
+						 "%s-%s", hdev->name,
+						 name);
+	if (!htrig->led_trigger.name)
+		goto err_alloc;
+
+	if (devm_led_trigger_register(&hdev->dev, &htrig->led_trigger))
+		goto err_register;
+
+	return &htrig->led_trigger;
+
+err_register:
+	devm_kfree(&hdev->dev, (void *)htrig->led_trigger.name);
+err_alloc:
+	devm_kfree(&hdev->dev, htrig);
+	return NULL;
+}
+
+void hci_leds_init(struct hci_dev *hdev)
+{
+	/* initialize power_led */
+	hdev->power_led = led_allocate_basic(hdev, power_activate, "power");
+}
+
+void bt_leds_init(void)
+{
+	led_trigger_register_simple("bluetooth-power", &bt_power_led_trigger);
+}
+
+void bt_leds_cleanup(void)
+{
+	led_trigger_unregister_simple(bt_power_led_trigger);
+}
diff --git a/net/bluetooth/leds.h b/net/bluetooth/leds.h
new file mode 100644
index 000000000..bb5e09204
--- /dev/null
+++ b/net/bluetooth/leds.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright 2015, Heiner Kallweit <hkallweit1@gmail.com>
+ */
+
+#if IS_ENABLED(CONFIG_BT_LEDS)
+
+void hci_leds_update_powered(struct hci_dev *hdev, bool enabled);
+void hci_leds_init(struct hci_dev *hdev);
+
+void bt_leds_init(void);
+void bt_leds_cleanup(void);
+
+#else
+
+static inline void hci_leds_update_powered(struct hci_dev *hdev,
+					   bool enabled) {}
+static inline void hci_leds_init(struct hci_dev *hdev) {}
+
+static inline void bt_leds_init(void) {}
+static inline void bt_leds_cleanup(void) {}
+
+#endif
diff --git a/net/bluetooth/lib.c b/net/bluetooth/lib.c
new file mode 100644
index 000000000..5326f41a5
--- /dev/null
+++ b/net/bluetooth/lib.c
@@ -0,0 +1,249 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2000-2001 Qualcomm Incorporated
+
+   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth kernel library. */
+
+#define pr_fmt(fmt) "Bluetooth: " fmt
+
+#include <linux/export.h>
+
+#include <net/bluetooth/bluetooth.h>
+
+void baswap(bdaddr_t *dst, const bdaddr_t *src)
+{
+	const unsigned char *s = (const unsigned char *)src;
+	unsigned char *d = (unsigned char *)dst;
+	unsigned int i;
+
+	for (i = 0; i < 6; i++)
+		d[i] = s[5 - i];
+}
+EXPORT_SYMBOL(baswap);
+
+/* Bluetooth error codes to Unix errno mapping */
+int bt_to_errno(__u16 code)
+{
+	switch (code) {
+	case 0:
+		return 0;
+
+	case 0x01:
+		return EBADRQC;
+
+	case 0x02:
+		return ENOTCONN;
+
+	case 0x03:
+		return EIO;
+
+	case 0x04:
+	case 0x3c:
+		return EHOSTDOWN;
+
+	case 0x05:
+		return EACCES;
+
+	case 0x06:
+		return EBADE;
+
+	case 0x07:
+		return ENOMEM;
+
+	case 0x08:
+		return ETIMEDOUT;
+
+	case 0x09:
+		return EMLINK;
+
+	case 0x0a:
+		return EMLINK;
+
+	case 0x0b:
+		return EALREADY;
+
+	case 0x0c:
+		return EBUSY;
+
+	case 0x0d:
+	case 0x0e:
+	case 0x0f:
+		return ECONNREFUSED;
+
+	case 0x10:
+		return ETIMEDOUT;
+
+	case 0x11:
+	case 0x27:
+	case 0x29:
+	case 0x20:
+		return EOPNOTSUPP;
+
+	case 0x12:
+		return EINVAL;
+
+	case 0x13:
+	case 0x14:
+	case 0x15:
+		return ECONNRESET;
+
+	case 0x16:
+		return ECONNABORTED;
+
+	case 0x17:
+		return ELOOP;
+
+	case 0x18:
+		return EACCES;
+
+	case 0x1a:
+		return EPROTONOSUPPORT;
+
+	case 0x1b:
+		return ECONNREFUSED;
+
+	case 0x19:
+	case 0x1e:
+	case 0x23:
+	case 0x24:
+	case 0x25:
+		return EPROTO;
+
+	default:
+		return ENOSYS;
+	}
+}
+EXPORT_SYMBOL(bt_to_errno);
+
+void bt_info(const char *format, ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	va_start(args, format);
+
+	vaf.fmt = format;
+	vaf.va = &args;
+
+	pr_info("%pV", &vaf);
+
+	va_end(args);
+}
+EXPORT_SYMBOL(bt_info);
+
+void bt_warn(const char *format, ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	va_start(args, format);
+
+	vaf.fmt = format;
+	vaf.va = &args;
+
+	pr_warn("%pV", &vaf);
+
+	va_end(args);
+}
+EXPORT_SYMBOL(bt_warn);
+
+void bt_err(const char *format, ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	va_start(args, format);
+
+	vaf.fmt = format;
+	vaf.va = &args;
+
+	pr_err("%pV", &vaf);
+
+	va_end(args);
+}
+EXPORT_SYMBOL(bt_err);
+
+#ifdef CONFIG_BT_FEATURE_DEBUG
+static bool debug_enable;
+
+void bt_dbg_set(bool enable)
+{
+	debug_enable = enable;
+}
+
+bool bt_dbg_get(void)
+{
+	return debug_enable;
+}
+
+void bt_dbg(const char *format, ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	if (likely(!debug_enable))
+		return;
+
+	va_start(args, format);
+
+	vaf.fmt = format;
+	vaf.va = &args;
+
+	printk(KERN_DEBUG pr_fmt("%pV"), &vaf);
+
+	va_end(args);
+}
+EXPORT_SYMBOL(bt_dbg);
+#endif
+
+void bt_warn_ratelimited(const char *format, ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	va_start(args, format);
+
+	vaf.fmt = format;
+	vaf.va = &args;
+
+	pr_warn_ratelimited("%pV", &vaf);
+
+	va_end(args);
+}
+EXPORT_SYMBOL(bt_warn_ratelimited);
+
+void bt_err_ratelimited(const char *format, ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	va_start(args, format);
+
+	vaf.fmt = format;
+	vaf.va = &args;
+
+	pr_err_ratelimited("%pV", &vaf);
+
+	va_end(args);
+}
+EXPORT_SYMBOL(bt_err_ratelimited);
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
new file mode 100644
index 000000000..bd8cfcfca
--- /dev/null
+++ b/net/bluetooth/mgmt.c
@@ -0,0 +1,8946 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+
+   Copyright (C) 2010  Nokia Corporation
+   Copyright (C) 2011-2012 Intel Corporation
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth HCI Management interface */
+
+#include <linux/module.h>
+#include <asm/unaligned.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/hci_sock.h>
+#include <net/bluetooth/l2cap.h>
+#include <net/bluetooth/mgmt.h>
+
+#include "hci_request.h"
+#include "smp.h"
+#include "mgmt_util.h"
+#include "mgmt_config.h"
+#include "msft.h"
+
+#define MGMT_VERSION	1
+#define MGMT_REVISION	18
+
+static const u16 mgmt_commands[] = {
+	MGMT_OP_READ_INDEX_LIST,
+	MGMT_OP_READ_INFO,
+	MGMT_OP_SET_POWERED,
+	MGMT_OP_SET_DISCOVERABLE,
+	MGMT_OP_SET_CONNECTABLE,
+	MGMT_OP_SET_FAST_CONNECTABLE,
+	MGMT_OP_SET_BONDABLE,
+	MGMT_OP_SET_LINK_SECURITY,
+	MGMT_OP_SET_SSP,
+	MGMT_OP_SET_HS,
+	MGMT_OP_SET_LE,
+	MGMT_OP_SET_DEV_CLASS,
+	MGMT_OP_SET_LOCAL_NAME,
+	MGMT_OP_ADD_UUID,
+	MGMT_OP_REMOVE_UUID,
+	MGMT_OP_LOAD_LINK_KEYS,
+	MGMT_OP_LOAD_LONG_TERM_KEYS,
+	MGMT_OP_DISCONNECT,
+	MGMT_OP_GET_CONNECTIONS,
+	MGMT_OP_PIN_CODE_REPLY,
+	MGMT_OP_PIN_CODE_NEG_REPLY,
+	MGMT_OP_SET_IO_CAPABILITY,
+	MGMT_OP_PAIR_DEVICE,
+	MGMT_OP_CANCEL_PAIR_DEVICE,
+	MGMT_OP_UNPAIR_DEVICE,
+	MGMT_OP_USER_CONFIRM_REPLY,
+	MGMT_OP_USER_CONFIRM_NEG_REPLY,
+	MGMT_OP_USER_PASSKEY_REPLY,
+	MGMT_OP_USER_PASSKEY_NEG_REPLY,
+	MGMT_OP_READ_LOCAL_OOB_DATA,
+	MGMT_OP_ADD_REMOTE_OOB_DATA,
+	MGMT_OP_REMOVE_REMOTE_OOB_DATA,
+	MGMT_OP_START_DISCOVERY,
+	MGMT_OP_STOP_DISCOVERY,
+	MGMT_OP_CONFIRM_NAME,
+	MGMT_OP_BLOCK_DEVICE,
+	MGMT_OP_UNBLOCK_DEVICE,
+	MGMT_OP_SET_DEVICE_ID,
+	MGMT_OP_SET_ADVERTISING,
+	MGMT_OP_SET_BREDR,
+	MGMT_OP_SET_STATIC_ADDRESS,
+	MGMT_OP_SET_SCAN_PARAMS,
+	MGMT_OP_SET_SECURE_CONN,
+	MGMT_OP_SET_DEBUG_KEYS,
+	MGMT_OP_SET_PRIVACY,
+	MGMT_OP_LOAD_IRKS,
+	MGMT_OP_GET_CONN_INFO,
+	MGMT_OP_GET_CLOCK_INFO,
+	MGMT_OP_ADD_DEVICE,
+	MGMT_OP_REMOVE_DEVICE,
+	MGMT_OP_LOAD_CONN_PARAM,
+	MGMT_OP_READ_UNCONF_INDEX_LIST,
+	MGMT_OP_READ_CONFIG_INFO,
+	MGMT_OP_SET_EXTERNAL_CONFIG,
+	MGMT_OP_SET_PUBLIC_ADDRESS,
+	MGMT_OP_START_SERVICE_DISCOVERY,
+	MGMT_OP_READ_LOCAL_OOB_EXT_DATA,
+	MGMT_OP_READ_EXT_INDEX_LIST,
+	MGMT_OP_READ_ADV_FEATURES,
+	MGMT_OP_ADD_ADVERTISING,
+	MGMT_OP_REMOVE_ADVERTISING,
+	MGMT_OP_GET_ADV_SIZE_INFO,
+	MGMT_OP_START_LIMITED_DISCOVERY,
+	MGMT_OP_READ_EXT_INFO,
+	MGMT_OP_SET_APPEARANCE,
+	MGMT_OP_SET_BLOCKED_KEYS,
+	MGMT_OP_SET_WIDEBAND_SPEECH,
+	MGMT_OP_READ_SECURITY_INFO,
+	MGMT_OP_READ_EXP_FEATURES_INFO,
+	MGMT_OP_SET_EXP_FEATURE,
+	MGMT_OP_READ_DEF_SYSTEM_CONFIG,
+	MGMT_OP_SET_DEF_SYSTEM_CONFIG,
+	MGMT_OP_READ_DEF_RUNTIME_CONFIG,
+	MGMT_OP_SET_DEF_RUNTIME_CONFIG,
+	MGMT_OP_GET_DEVICE_FLAGS,
+	MGMT_OP_SET_DEVICE_FLAGS,
+	MGMT_OP_READ_ADV_MONITOR_FEATURES,
+	MGMT_OP_ADD_ADV_PATTERNS_MONITOR,
+	MGMT_OP_REMOVE_ADV_MONITOR,
+};
+
+static const u16 mgmt_events[] = {
+	MGMT_EV_CONTROLLER_ERROR,
+	MGMT_EV_INDEX_ADDED,
+	MGMT_EV_INDEX_REMOVED,
+	MGMT_EV_NEW_SETTINGS,
+	MGMT_EV_CLASS_OF_DEV_CHANGED,
+	MGMT_EV_LOCAL_NAME_CHANGED,
+	MGMT_EV_NEW_LINK_KEY,
+	MGMT_EV_NEW_LONG_TERM_KEY,
+	MGMT_EV_DEVICE_CONNECTED,
+	MGMT_EV_DEVICE_DISCONNECTED,
+	MGMT_EV_CONNECT_FAILED,
+	MGMT_EV_PIN_CODE_REQUEST,
+	MGMT_EV_USER_CONFIRM_REQUEST,
+	MGMT_EV_USER_PASSKEY_REQUEST,
+	MGMT_EV_AUTH_FAILED,
+	MGMT_EV_DEVICE_FOUND,
+	MGMT_EV_DISCOVERING,
+	MGMT_EV_DEVICE_BLOCKED,
+	MGMT_EV_DEVICE_UNBLOCKED,
+	MGMT_EV_DEVICE_UNPAIRED,
+	MGMT_EV_PASSKEY_NOTIFY,
+	MGMT_EV_NEW_IRK,
+	MGMT_EV_NEW_CSRK,
+	MGMT_EV_DEVICE_ADDED,
+	MGMT_EV_DEVICE_REMOVED,
+	MGMT_EV_NEW_CONN_PARAM,
+	MGMT_EV_UNCONF_INDEX_ADDED,
+	MGMT_EV_UNCONF_INDEX_REMOVED,
+	MGMT_EV_NEW_CONFIG_OPTIONS,
+	MGMT_EV_EXT_INDEX_ADDED,
+	MGMT_EV_EXT_INDEX_REMOVED,
+	MGMT_EV_LOCAL_OOB_DATA_UPDATED,
+	MGMT_EV_ADVERTISING_ADDED,
+	MGMT_EV_ADVERTISING_REMOVED,
+	MGMT_EV_EXT_INFO_CHANGED,
+	MGMT_EV_PHY_CONFIGURATION_CHANGED,
+	MGMT_EV_EXP_FEATURE_CHANGED,
+	MGMT_EV_DEVICE_FLAGS_CHANGED,
+	MGMT_EV_CONTROLLER_SUSPEND,
+	MGMT_EV_CONTROLLER_RESUME,
+};
+
+static const u16 mgmt_untrusted_commands[] = {
+	MGMT_OP_READ_INDEX_LIST,
+	MGMT_OP_READ_INFO,
+	MGMT_OP_READ_UNCONF_INDEX_LIST,
+	MGMT_OP_READ_CONFIG_INFO,
+	MGMT_OP_READ_EXT_INDEX_LIST,
+	MGMT_OP_READ_EXT_INFO,
+	MGMT_OP_READ_SECURITY_INFO,
+	MGMT_OP_READ_EXP_FEATURES_INFO,
+	MGMT_OP_READ_DEF_SYSTEM_CONFIG,
+	MGMT_OP_READ_DEF_RUNTIME_CONFIG,
+};
+
+static const u16 mgmt_untrusted_events[] = {
+	MGMT_EV_INDEX_ADDED,
+	MGMT_EV_INDEX_REMOVED,
+	MGMT_EV_NEW_SETTINGS,
+	MGMT_EV_CLASS_OF_DEV_CHANGED,
+	MGMT_EV_LOCAL_NAME_CHANGED,
+	MGMT_EV_UNCONF_INDEX_ADDED,
+	MGMT_EV_UNCONF_INDEX_REMOVED,
+	MGMT_EV_NEW_CONFIG_OPTIONS,
+	MGMT_EV_EXT_INDEX_ADDED,
+	MGMT_EV_EXT_INDEX_REMOVED,
+	MGMT_EV_EXT_INFO_CHANGED,
+	MGMT_EV_EXP_FEATURE_CHANGED,
+	MGMT_EV_ADV_MONITOR_ADDED,
+	MGMT_EV_ADV_MONITOR_REMOVED,
+};
+
+#define CACHE_TIMEOUT	msecs_to_jiffies(2 * 1000)
+
+#define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \
+		 "\x00\x00\x00\x00\x00\x00\x00\x00"
+
+/* HCI to MGMT error code conversion table */
+static const u8 mgmt_status_table[] = {
+	MGMT_STATUS_SUCCESS,
+	MGMT_STATUS_UNKNOWN_COMMAND,	/* Unknown Command */
+	MGMT_STATUS_NOT_CONNECTED,	/* No Connection */
+	MGMT_STATUS_FAILED,		/* Hardware Failure */
+	MGMT_STATUS_CONNECT_FAILED,	/* Page Timeout */
+	MGMT_STATUS_AUTH_FAILED,	/* Authentication Failed */
+	MGMT_STATUS_AUTH_FAILED,	/* PIN or Key Missing */
+	MGMT_STATUS_NO_RESOURCES,	/* Memory Full */
+	MGMT_STATUS_TIMEOUT,		/* Connection Timeout */
+	MGMT_STATUS_NO_RESOURCES,	/* Max Number of Connections */
+	MGMT_STATUS_NO_RESOURCES,	/* Max Number of SCO Connections */
+	MGMT_STATUS_ALREADY_CONNECTED,	/* ACL Connection Exists */
+	MGMT_STATUS_BUSY,		/* Command Disallowed */
+	MGMT_STATUS_NO_RESOURCES,	/* Rejected Limited Resources */
+	MGMT_STATUS_REJECTED,		/* Rejected Security */
+	MGMT_STATUS_REJECTED,		/* Rejected Personal */
+	MGMT_STATUS_TIMEOUT,		/* Host Timeout */
+	MGMT_STATUS_NOT_SUPPORTED,	/* Unsupported Feature */
+	MGMT_STATUS_INVALID_PARAMS,	/* Invalid Parameters */
+	MGMT_STATUS_DISCONNECTED,	/* OE User Ended Connection */
+	MGMT_STATUS_NO_RESOURCES,	/* OE Low Resources */
+	MGMT_STATUS_DISCONNECTED,	/* OE Power Off */
+	MGMT_STATUS_DISCONNECTED,	/* Connection Terminated */
+	MGMT_STATUS_BUSY,		/* Repeated Attempts */
+	MGMT_STATUS_REJECTED,		/* Pairing Not Allowed */
+	MGMT_STATUS_FAILED,		/* Unknown LMP PDU */
+	MGMT_STATUS_NOT_SUPPORTED,	/* Unsupported Remote Feature */
+	MGMT_STATUS_REJECTED,		/* SCO Offset Rejected */
+	MGMT_STATUS_REJECTED,		/* SCO Interval Rejected */
+	MGMT_STATUS_REJECTED,		/* Air Mode Rejected */
+	MGMT_STATUS_INVALID_PARAMS,	/* Invalid LMP Parameters */
+	MGMT_STATUS_FAILED,		/* Unspecified Error */
+	MGMT_STATUS_NOT_SUPPORTED,	/* Unsupported LMP Parameter Value */
+	MGMT_STATUS_FAILED,		/* Role Change Not Allowed */
+	MGMT_STATUS_TIMEOUT,		/* LMP Response Timeout */
+	MGMT_STATUS_FAILED,		/* LMP Error Transaction Collision */
+	MGMT_STATUS_FAILED,		/* LMP PDU Not Allowed */
+	MGMT_STATUS_REJECTED,		/* Encryption Mode Not Accepted */
+	MGMT_STATUS_FAILED,		/* Unit Link Key Used */
+	MGMT_STATUS_NOT_SUPPORTED,	/* QoS Not Supported */
+	MGMT_STATUS_TIMEOUT,		/* Instant Passed */
+	MGMT_STATUS_NOT_SUPPORTED,	/* Pairing Not Supported */
+	MGMT_STATUS_FAILED,		/* Transaction Collision */
+	MGMT_STATUS_FAILED,		/* Reserved for future use */
+	MGMT_STATUS_INVALID_PARAMS,	/* Unacceptable Parameter */
+	MGMT_STATUS_REJECTED,		/* QoS Rejected */
+	MGMT_STATUS_NOT_SUPPORTED,	/* Classification Not Supported */
+	MGMT_STATUS_REJECTED,		/* Insufficient Security */
+	MGMT_STATUS_INVALID_PARAMS,	/* Parameter Out Of Range */
+	MGMT_STATUS_FAILED,		/* Reserved for future use */
+	MGMT_STATUS_BUSY,		/* Role Switch Pending */
+	MGMT_STATUS_FAILED,		/* Reserved for future use */
+	MGMT_STATUS_FAILED,		/* Slot Violation */
+	MGMT_STATUS_FAILED,		/* Role Switch Failed */
+	MGMT_STATUS_INVALID_PARAMS,	/* EIR Too Large */
+	MGMT_STATUS_NOT_SUPPORTED,	/* Simple Pairing Not Supported */
+	MGMT_STATUS_BUSY,		/* Host Busy Pairing */
+	MGMT_STATUS_REJECTED,		/* Rejected, No Suitable Channel */
+	MGMT_STATUS_BUSY,		/* Controller Busy */
+	MGMT_STATUS_INVALID_PARAMS,	/* Unsuitable Connection Interval */
+	MGMT_STATUS_TIMEOUT,		/* Directed Advertising Timeout */
+	MGMT_STATUS_AUTH_FAILED,	/* Terminated Due to MIC Failure */
+	MGMT_STATUS_CONNECT_FAILED,	/* Connection Establishment Failed */
+	MGMT_STATUS_CONNECT_FAILED,	/* MAC Connection Failed */
+};
+
+static u8 mgmt_status(u8 hci_status)
+{
+	if (hci_status < ARRAY_SIZE(mgmt_status_table))
+		return mgmt_status_table[hci_status];
+
+	return MGMT_STATUS_FAILED;
+}
+
+static int mgmt_index_event(u16 event, struct hci_dev *hdev, void *data,
+			    u16 len, int flag)
+{
+	return mgmt_send_event(event, hdev, HCI_CHANNEL_CONTROL, data, len,
+			       flag, NULL);
+}
+
+static int mgmt_limited_event(u16 event, struct hci_dev *hdev, void *data,
+			      u16 len, int flag, struct sock *skip_sk)
+{
+	return mgmt_send_event(event, hdev, HCI_CHANNEL_CONTROL, data, len,
+			       flag, skip_sk);
+}
+
+static int mgmt_event(u16 event, struct hci_dev *hdev, void *data, u16 len,
+		      struct sock *skip_sk)
+{
+	return mgmt_send_event(event, hdev, HCI_CHANNEL_CONTROL, data, len,
+			       HCI_SOCK_TRUSTED, skip_sk);
+}
+
+static u8 le_addr_type(u8 mgmt_addr_type)
+{
+	if (mgmt_addr_type == BDADDR_LE_PUBLIC)
+		return ADDR_LE_DEV_PUBLIC;
+	else
+		return ADDR_LE_DEV_RANDOM;
+}
+
+void mgmt_fill_version_info(void *ver)
+{
+	struct mgmt_rp_read_version *rp = ver;
+
+	rp->version = MGMT_VERSION;
+	rp->revision = cpu_to_le16(MGMT_REVISION);
+}
+
+static int read_version(struct sock *sk, struct hci_dev *hdev, void *data,
+			u16 data_len)
+{
+	struct mgmt_rp_read_version rp;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	mgmt_fill_version_info(&rp);
+
+	return mgmt_cmd_complete(sk, MGMT_INDEX_NONE, MGMT_OP_READ_VERSION, 0,
+				 &rp, sizeof(rp));
+}
+
+static int read_commands(struct sock *sk, struct hci_dev *hdev, void *data,
+			 u16 data_len)
+{
+	struct mgmt_rp_read_commands *rp;
+	u16 num_commands, num_events;
+	size_t rp_size;
+	int i, err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (hci_sock_test_flag(sk, HCI_SOCK_TRUSTED)) {
+		num_commands = ARRAY_SIZE(mgmt_commands);
+		num_events = ARRAY_SIZE(mgmt_events);
+	} else {
+		num_commands = ARRAY_SIZE(mgmt_untrusted_commands);
+		num_events = ARRAY_SIZE(mgmt_untrusted_events);
+	}
+
+	rp_size = sizeof(*rp) + ((num_commands + num_events) * sizeof(u16));
+
+	rp = kmalloc(rp_size, GFP_KERNEL);
+	if (!rp)
+		return -ENOMEM;
+
+	rp->num_commands = cpu_to_le16(num_commands);
+	rp->num_events = cpu_to_le16(num_events);
+
+	if (hci_sock_test_flag(sk, HCI_SOCK_TRUSTED)) {
+		__le16 *opcode = rp->opcodes;
+
+		for (i = 0; i < num_commands; i++, opcode++)
+			put_unaligned_le16(mgmt_commands[i], opcode);
+
+		for (i = 0; i < num_events; i++, opcode++)
+			put_unaligned_le16(mgmt_events[i], opcode);
+	} else {
+		__le16 *opcode = rp->opcodes;
+
+		for (i = 0; i < num_commands; i++, opcode++)
+			put_unaligned_le16(mgmt_untrusted_commands[i], opcode);
+
+		for (i = 0; i < num_events; i++, opcode++)
+			put_unaligned_le16(mgmt_untrusted_events[i], opcode);
+	}
+
+	err = mgmt_cmd_complete(sk, MGMT_INDEX_NONE, MGMT_OP_READ_COMMANDS, 0,
+				rp, rp_size);
+	kfree(rp);
+
+	return err;
+}
+
+static int read_index_list(struct sock *sk, struct hci_dev *hdev, void *data,
+			   u16 data_len)
+{
+	struct mgmt_rp_read_index_list *rp;
+	struct hci_dev *d;
+	size_t rp_len;
+	u16 count;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	read_lock(&hci_dev_list_lock);
+
+	count = 0;
+	list_for_each_entry(d, &hci_dev_list, list) {
+		if (d->dev_type == HCI_PRIMARY &&
+		    !hci_dev_test_flag(d, HCI_UNCONFIGURED))
+			count++;
+	}
+
+	rp_len = sizeof(*rp) + (2 * count);
+	rp = kmalloc(rp_len, GFP_ATOMIC);
+	if (!rp) {
+		read_unlock(&hci_dev_list_lock);
+		return -ENOMEM;
+	}
+
+	count = 0;
+	list_for_each_entry(d, &hci_dev_list, list) {
+		if (hci_dev_test_flag(d, HCI_SETUP) ||
+		    hci_dev_test_flag(d, HCI_CONFIG) ||
+		    hci_dev_test_flag(d, HCI_USER_CHANNEL))
+			continue;
+
+		/* Devices marked as raw-only are neither configured
+		 * nor unconfigured controllers.
+		 */
+		if (test_bit(HCI_QUIRK_RAW_DEVICE, &d->quirks))
+			continue;
+
+		if (d->dev_type == HCI_PRIMARY &&
+		    !hci_dev_test_flag(d, HCI_UNCONFIGURED)) {
+			rp->index[count++] = cpu_to_le16(d->id);
+			bt_dev_dbg(hdev, "Added hci%u", d->id);
+		}
+	}
+
+	rp->num_controllers = cpu_to_le16(count);
+	rp_len = sizeof(*rp) + (2 * count);
+
+	read_unlock(&hci_dev_list_lock);
+
+	err = mgmt_cmd_complete(sk, MGMT_INDEX_NONE, MGMT_OP_READ_INDEX_LIST,
+				0, rp, rp_len);
+
+	kfree(rp);
+
+	return err;
+}
+
+static int read_unconf_index_list(struct sock *sk, struct hci_dev *hdev,
+				  void *data, u16 data_len)
+{
+	struct mgmt_rp_read_unconf_index_list *rp;
+	struct hci_dev *d;
+	size_t rp_len;
+	u16 count;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	read_lock(&hci_dev_list_lock);
+
+	count = 0;
+	list_for_each_entry(d, &hci_dev_list, list) {
+		if (d->dev_type == HCI_PRIMARY &&
+		    hci_dev_test_flag(d, HCI_UNCONFIGURED))
+			count++;
+	}
+
+	rp_len = sizeof(*rp) + (2 * count);
+	rp = kmalloc(rp_len, GFP_ATOMIC);
+	if (!rp) {
+		read_unlock(&hci_dev_list_lock);
+		return -ENOMEM;
+	}
+
+	count = 0;
+	list_for_each_entry(d, &hci_dev_list, list) {
+		if (hci_dev_test_flag(d, HCI_SETUP) ||
+		    hci_dev_test_flag(d, HCI_CONFIG) ||
+		    hci_dev_test_flag(d, HCI_USER_CHANNEL))
+			continue;
+
+		/* Devices marked as raw-only are neither configured
+		 * nor unconfigured controllers.
+		 */
+		if (test_bit(HCI_QUIRK_RAW_DEVICE, &d->quirks))
+			continue;
+
+		if (d->dev_type == HCI_PRIMARY &&
+		    hci_dev_test_flag(d, HCI_UNCONFIGURED)) {
+			rp->index[count++] = cpu_to_le16(d->id);
+			bt_dev_dbg(hdev, "Added hci%u", d->id);
+		}
+	}
+
+	rp->num_controllers = cpu_to_le16(count);
+	rp_len = sizeof(*rp) + (2 * count);
+
+	read_unlock(&hci_dev_list_lock);
+
+	err = mgmt_cmd_complete(sk, MGMT_INDEX_NONE,
+				MGMT_OP_READ_UNCONF_INDEX_LIST, 0, rp, rp_len);
+
+	kfree(rp);
+
+	return err;
+}
+
+static int read_ext_index_list(struct sock *sk, struct hci_dev *hdev,
+			       void *data, u16 data_len)
+{
+	struct mgmt_rp_read_ext_index_list *rp;
+	struct hci_dev *d;
+	u16 count;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	read_lock(&hci_dev_list_lock);
+
+	count = 0;
+	list_for_each_entry(d, &hci_dev_list, list) {
+		if (d->dev_type == HCI_PRIMARY || d->dev_type == HCI_AMP)
+			count++;
+	}
+
+	rp = kmalloc(struct_size(rp, entry, count), GFP_ATOMIC);
+	if (!rp) {
+		read_unlock(&hci_dev_list_lock);
+		return -ENOMEM;
+	}
+
+	count = 0;
+	list_for_each_entry(d, &hci_dev_list, list) {
+		if (hci_dev_test_flag(d, HCI_SETUP) ||
+		    hci_dev_test_flag(d, HCI_CONFIG) ||
+		    hci_dev_test_flag(d, HCI_USER_CHANNEL))
+			continue;
+
+		/* Devices marked as raw-only are neither configured
+		 * nor unconfigured controllers.
+		 */
+		if (test_bit(HCI_QUIRK_RAW_DEVICE, &d->quirks))
+			continue;
+
+		if (d->dev_type == HCI_PRIMARY) {
+			if (hci_dev_test_flag(d, HCI_UNCONFIGURED))
+				rp->entry[count].type = 0x01;
+			else
+				rp->entry[count].type = 0x00;
+		} else if (d->dev_type == HCI_AMP) {
+			rp->entry[count].type = 0x02;
+		} else {
+			continue;
+		}
+
+		rp->entry[count].bus = d->bus;
+		rp->entry[count++].index = cpu_to_le16(d->id);
+		bt_dev_dbg(hdev, "Added hci%u", d->id);
+	}
+
+	rp->num_controllers = cpu_to_le16(count);
+
+	read_unlock(&hci_dev_list_lock);
+
+	/* If this command is called at least once, then all the
+	 * default index and unconfigured index events are disabled
+	 * and from now on only extended index events are used.
+	 */
+	hci_sock_set_flag(sk, HCI_MGMT_EXT_INDEX_EVENTS);
+	hci_sock_clear_flag(sk, HCI_MGMT_INDEX_EVENTS);
+	hci_sock_clear_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS);
+
+	err = mgmt_cmd_complete(sk, MGMT_INDEX_NONE,
+				MGMT_OP_READ_EXT_INDEX_LIST, 0, rp,
+				struct_size(rp, entry, count));
+
+	kfree(rp);
+
+	return err;
+}
+
+static bool is_configured(struct hci_dev *hdev)
+{
+	if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) &&
+	    !hci_dev_test_flag(hdev, HCI_EXT_CONFIGURED))
+		return false;
+
+	if ((test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) ||
+	     test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) &&
+	    !bacmp(&hdev->public_addr, BDADDR_ANY))
+		return false;
+
+	return true;
+}
+
+static __le32 get_missing_options(struct hci_dev *hdev)
+{
+	u32 options = 0;
+
+	if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) &&
+	    !hci_dev_test_flag(hdev, HCI_EXT_CONFIGURED))
+		options |= MGMT_OPTION_EXTERNAL_CONFIG;
+
+	if ((test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) ||
+	     test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) &&
+	    !bacmp(&hdev->public_addr, BDADDR_ANY))
+		options |= MGMT_OPTION_PUBLIC_ADDRESS;
+
+	return cpu_to_le32(options);
+}
+
+static int new_options(struct hci_dev *hdev, struct sock *skip)
+{
+	__le32 options = get_missing_options(hdev);
+
+	return mgmt_limited_event(MGMT_EV_NEW_CONFIG_OPTIONS, hdev, &options,
+				  sizeof(options), HCI_MGMT_OPTION_EVENTS, skip);
+}
+
+static int send_options_rsp(struct sock *sk, u16 opcode, struct hci_dev *hdev)
+{
+	__le32 options = get_missing_options(hdev);
+
+	return mgmt_cmd_complete(sk, hdev->id, opcode, 0, &options,
+				 sizeof(options));
+}
+
+static int read_config_info(struct sock *sk, struct hci_dev *hdev,
+			    void *data, u16 data_len)
+{
+	struct mgmt_rp_read_config_info rp;
+	u32 options = 0;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	hci_dev_lock(hdev);
+
+	memset(&rp, 0, sizeof(rp));
+	rp.manufacturer = cpu_to_le16(hdev->manufacturer);
+
+	if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks))
+		options |= MGMT_OPTION_EXTERNAL_CONFIG;
+
+	if (hdev->set_bdaddr)
+		options |= MGMT_OPTION_PUBLIC_ADDRESS;
+
+	rp.supported_options = cpu_to_le32(options);
+	rp.missing_options = get_missing_options(hdev);
+
+	hci_dev_unlock(hdev);
+
+	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_CONFIG_INFO, 0,
+				 &rp, sizeof(rp));
+}
+
+static u32 get_supported_phys(struct hci_dev *hdev)
+{
+	u32 supported_phys = 0;
+
+	if (lmp_bredr_capable(hdev)) {
+		supported_phys |= MGMT_PHY_BR_1M_1SLOT;
+
+		if (hdev->features[0][0] & LMP_3SLOT)
+			supported_phys |= MGMT_PHY_BR_1M_3SLOT;
+
+		if (hdev->features[0][0] & LMP_5SLOT)
+			supported_phys |= MGMT_PHY_BR_1M_5SLOT;
+
+		if (lmp_edr_2m_capable(hdev)) {
+			supported_phys |= MGMT_PHY_EDR_2M_1SLOT;
+
+			if (lmp_edr_3slot_capable(hdev))
+				supported_phys |= MGMT_PHY_EDR_2M_3SLOT;
+
+			if (lmp_edr_5slot_capable(hdev))
+				supported_phys |= MGMT_PHY_EDR_2M_5SLOT;
+
+			if (lmp_edr_3m_capable(hdev)) {
+				supported_phys |= MGMT_PHY_EDR_3M_1SLOT;
+
+				if (lmp_edr_3slot_capable(hdev))
+					supported_phys |= MGMT_PHY_EDR_3M_3SLOT;
+
+				if (lmp_edr_5slot_capable(hdev))
+					supported_phys |= MGMT_PHY_EDR_3M_5SLOT;
+			}
+		}
+	}
+
+	if (lmp_le_capable(hdev)) {
+		supported_phys |= MGMT_PHY_LE_1M_TX;
+		supported_phys |= MGMT_PHY_LE_1M_RX;
+
+		if (hdev->le_features[1] & HCI_LE_PHY_2M) {
+			supported_phys |= MGMT_PHY_LE_2M_TX;
+			supported_phys |= MGMT_PHY_LE_2M_RX;
+		}
+
+		if (hdev->le_features[1] & HCI_LE_PHY_CODED) {
+			supported_phys |= MGMT_PHY_LE_CODED_TX;
+			supported_phys |= MGMT_PHY_LE_CODED_RX;
+		}
+	}
+
+	return supported_phys;
+}
+
+static u32 get_selected_phys(struct hci_dev *hdev)
+{
+	u32 selected_phys = 0;
+
+	if (lmp_bredr_capable(hdev)) {
+		selected_phys |= MGMT_PHY_BR_1M_1SLOT;
+
+		if (hdev->pkt_type & (HCI_DM3 | HCI_DH3))
+			selected_phys |= MGMT_PHY_BR_1M_3SLOT;
+
+		if (hdev->pkt_type & (HCI_DM5 | HCI_DH5))
+			selected_phys |= MGMT_PHY_BR_1M_5SLOT;
+
+		if (lmp_edr_2m_capable(hdev)) {
+			if (!(hdev->pkt_type & HCI_2DH1))
+				selected_phys |= MGMT_PHY_EDR_2M_1SLOT;
+
+			if (lmp_edr_3slot_capable(hdev) &&
+			    !(hdev->pkt_type & HCI_2DH3))
+				selected_phys |= MGMT_PHY_EDR_2M_3SLOT;
+
+			if (lmp_edr_5slot_capable(hdev) &&
+			    !(hdev->pkt_type & HCI_2DH5))
+				selected_phys |= MGMT_PHY_EDR_2M_5SLOT;
+
+			if (lmp_edr_3m_capable(hdev)) {
+				if (!(hdev->pkt_type & HCI_3DH1))
+					selected_phys |= MGMT_PHY_EDR_3M_1SLOT;
+
+				if (lmp_edr_3slot_capable(hdev) &&
+				    !(hdev->pkt_type & HCI_3DH3))
+					selected_phys |= MGMT_PHY_EDR_3M_3SLOT;
+
+				if (lmp_edr_5slot_capable(hdev) &&
+				    !(hdev->pkt_type & HCI_3DH5))
+					selected_phys |= MGMT_PHY_EDR_3M_5SLOT;
+			}
+		}
+	}
+
+	if (lmp_le_capable(hdev)) {
+		if (hdev->le_tx_def_phys & HCI_LE_SET_PHY_1M)
+			selected_phys |= MGMT_PHY_LE_1M_TX;
+
+		if (hdev->le_rx_def_phys & HCI_LE_SET_PHY_1M)
+			selected_phys |= MGMT_PHY_LE_1M_RX;
+
+		if (hdev->le_tx_def_phys & HCI_LE_SET_PHY_2M)
+			selected_phys |= MGMT_PHY_LE_2M_TX;
+
+		if (hdev->le_rx_def_phys & HCI_LE_SET_PHY_2M)
+			selected_phys |= MGMT_PHY_LE_2M_RX;
+
+		if (hdev->le_tx_def_phys & HCI_LE_SET_PHY_CODED)
+			selected_phys |= MGMT_PHY_LE_CODED_TX;
+
+		if (hdev->le_rx_def_phys & HCI_LE_SET_PHY_CODED)
+			selected_phys |= MGMT_PHY_LE_CODED_RX;
+	}
+
+	return selected_phys;
+}
+
+static u32 get_configurable_phys(struct hci_dev *hdev)
+{
+	return (get_supported_phys(hdev) & ~MGMT_PHY_BR_1M_1SLOT &
+		~MGMT_PHY_LE_1M_TX & ~MGMT_PHY_LE_1M_RX);
+}
+
+static u32 get_supported_settings(struct hci_dev *hdev)
+{
+	u32 settings = 0;
+
+	settings |= MGMT_SETTING_POWERED;
+	settings |= MGMT_SETTING_BONDABLE;
+	settings |= MGMT_SETTING_DEBUG_KEYS;
+	settings |= MGMT_SETTING_CONNECTABLE;
+	settings |= MGMT_SETTING_DISCOVERABLE;
+
+	if (lmp_bredr_capable(hdev)) {
+		if (hdev->hci_ver >= BLUETOOTH_VER_1_2)
+			settings |= MGMT_SETTING_FAST_CONNECTABLE;
+		settings |= MGMT_SETTING_BREDR;
+		settings |= MGMT_SETTING_LINK_SECURITY;
+
+		if (lmp_ssp_capable(hdev)) {
+			settings |= MGMT_SETTING_SSP;
+			if (IS_ENABLED(CONFIG_BT_HS))
+				settings |= MGMT_SETTING_HS;
+		}
+
+		if (lmp_sc_capable(hdev))
+			settings |= MGMT_SETTING_SECURE_CONN;
+
+		if (test_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED,
+			     &hdev->quirks))
+			settings |= MGMT_SETTING_WIDEBAND_SPEECH;
+	}
+
+	if (lmp_le_capable(hdev)) {
+		settings |= MGMT_SETTING_LE;
+		settings |= MGMT_SETTING_SECURE_CONN;
+		settings |= MGMT_SETTING_PRIVACY;
+		settings |= MGMT_SETTING_STATIC_ADDRESS;
+
+		/* When the experimental feature for LL Privacy support is
+		 * enabled, then advertising is no longer supported.
+		 */
+		if (!hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
+			settings |= MGMT_SETTING_ADVERTISING;
+	}
+
+	if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
+	    hdev->set_bdaddr)
+		settings |= MGMT_SETTING_CONFIGURATION;
+
+	settings |= MGMT_SETTING_PHY_CONFIGURATION;
+
+	return settings;
+}
+
+static u32 get_current_settings(struct hci_dev *hdev)
+{
+	u32 settings = 0;
+
+	if (hdev_is_powered(hdev))
+		settings |= MGMT_SETTING_POWERED;
+
+	if (hci_dev_test_flag(hdev, HCI_CONNECTABLE))
+		settings |= MGMT_SETTING_CONNECTABLE;
+
+	if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE))
+		settings |= MGMT_SETTING_FAST_CONNECTABLE;
+
+	if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
+		settings |= MGMT_SETTING_DISCOVERABLE;
+
+	if (hci_dev_test_flag(hdev, HCI_BONDABLE))
+		settings |= MGMT_SETTING_BONDABLE;
+
+	if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
+		settings |= MGMT_SETTING_BREDR;
+
+	if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
+		settings |= MGMT_SETTING_LE;
+
+	if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY))
+		settings |= MGMT_SETTING_LINK_SECURITY;
+
+	if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
+		settings |= MGMT_SETTING_SSP;
+
+	if (hci_dev_test_flag(hdev, HCI_HS_ENABLED))
+		settings |= MGMT_SETTING_HS;
+
+	if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
+		settings |= MGMT_SETTING_ADVERTISING;
+
+	if (hci_dev_test_flag(hdev, HCI_SC_ENABLED))
+		settings |= MGMT_SETTING_SECURE_CONN;
+
+	if (hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS))
+		settings |= MGMT_SETTING_DEBUG_KEYS;
+
+	if (hci_dev_test_flag(hdev, HCI_PRIVACY))
+		settings |= MGMT_SETTING_PRIVACY;
+
+	/* The current setting for static address has two purposes. The
+	 * first is to indicate if the static address will be used and
+	 * the second is to indicate if it is actually set.
+	 *
+	 * This means if the static address is not configured, this flag
+	 * will never be set. If the address is configured, then if the
+	 * address is actually used decides if the flag is set or not.
+	 *
+	 * For single mode LE only controllers and dual-mode controllers
+	 * with BR/EDR disabled, the existence of the static address will
+	 * be evaluated.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
+	    !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) ||
+	    !bacmp(&hdev->bdaddr, BDADDR_ANY)) {
+		if (bacmp(&hdev->static_addr, BDADDR_ANY))
+			settings |= MGMT_SETTING_STATIC_ADDRESS;
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_WIDEBAND_SPEECH_ENABLED))
+		settings |= MGMT_SETTING_WIDEBAND_SPEECH;
+
+	return settings;
+}
+
+static struct mgmt_pending_cmd *pending_find(u16 opcode, struct hci_dev *hdev)
+{
+	return mgmt_pending_find(HCI_CHANNEL_CONTROL, opcode, hdev);
+}
+
+static struct mgmt_pending_cmd *pending_find_data(u16 opcode,
+						  struct hci_dev *hdev,
+						  const void *data)
+{
+	return mgmt_pending_find_data(HCI_CHANNEL_CONTROL, opcode, hdev, data);
+}
+
+u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	/* If there's a pending mgmt command the flags will not yet have
+	 * their final values, so check for this first.
+	 */
+	cmd = pending_find(MGMT_OP_SET_DISCOVERABLE, hdev);
+	if (cmd) {
+		struct mgmt_mode *cp = cmd->param;
+		if (cp->val == 0x01)
+			return LE_AD_GENERAL;
+		else if (cp->val == 0x02)
+			return LE_AD_LIMITED;
+	} else {
+		if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
+			return LE_AD_LIMITED;
+		else if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
+			return LE_AD_GENERAL;
+	}
+
+	return 0;
+}
+
+bool mgmt_get_connectable(struct hci_dev *hdev)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	/* If there's a pending mgmt command the flag will not yet have
+	 * it's final value, so check for this first.
+	 */
+	cmd = pending_find(MGMT_OP_SET_CONNECTABLE, hdev);
+	if (cmd) {
+		struct mgmt_mode *cp = cmd->param;
+
+		return cp->val;
+	}
+
+	return hci_dev_test_flag(hdev, HCI_CONNECTABLE);
+}
+
+static void service_cache_off(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev,
+					    service_cache.work);
+	struct hci_request req;
+
+	if (!hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
+		return;
+
+	hci_req_init(&req, hdev);
+
+	hci_dev_lock(hdev);
+
+	__hci_req_update_eir(&req);
+	__hci_req_update_class(&req);
+
+	hci_dev_unlock(hdev);
+
+	hci_req_run(&req, NULL);
+}
+
+static void rpa_expired(struct work_struct *work)
+{
+	struct hci_dev *hdev = container_of(work, struct hci_dev,
+					    rpa_expired.work);
+	struct hci_request req;
+
+	bt_dev_dbg(hdev, "");
+
+	hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
+
+	if (!hci_dev_test_flag(hdev, HCI_ADVERTISING))
+		return;
+
+	/* The generation of a new RPA and programming it into the
+	 * controller happens in the hci_req_enable_advertising()
+	 * function.
+	 */
+	hci_req_init(&req, hdev);
+	if (ext_adv_capable(hdev))
+		__hci_req_start_ext_adv(&req, hdev->cur_adv_instance);
+	else
+		__hci_req_enable_advertising(&req);
+	hci_req_run(&req, NULL);
+}
+
+static void mgmt_init_hdev(struct sock *sk, struct hci_dev *hdev)
+{
+	if (hci_dev_test_and_set_flag(hdev, HCI_MGMT))
+		return;
+
+	INIT_DELAYED_WORK(&hdev->service_cache, service_cache_off);
+	INIT_DELAYED_WORK(&hdev->rpa_expired, rpa_expired);
+
+	/* Non-mgmt controlled devices get this bit set
+	 * implicitly so that pairing works for them, however
+	 * for mgmt we require user-space to explicitly enable
+	 * it
+	 */
+	hci_dev_clear_flag(hdev, HCI_BONDABLE);
+}
+
+static int read_controller_info(struct sock *sk, struct hci_dev *hdev,
+				void *data, u16 data_len)
+{
+	struct mgmt_rp_read_info rp;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	hci_dev_lock(hdev);
+
+	memset(&rp, 0, sizeof(rp));
+
+	bacpy(&rp.bdaddr, &hdev->bdaddr);
+
+	rp.version = hdev->hci_ver;
+	rp.manufacturer = cpu_to_le16(hdev->manufacturer);
+
+	rp.supported_settings = cpu_to_le32(get_supported_settings(hdev));
+	rp.current_settings = cpu_to_le32(get_current_settings(hdev));
+
+	memcpy(rp.dev_class, hdev->dev_class, 3);
+
+	memcpy(rp.name, hdev->dev_name, sizeof(hdev->dev_name));
+	memcpy(rp.short_name, hdev->short_name, sizeof(hdev->short_name));
+
+	hci_dev_unlock(hdev);
+
+	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_INFO, 0, &rp,
+				 sizeof(rp));
+}
+
+static u16 append_eir_data_to_buf(struct hci_dev *hdev, u8 *eir)
+{
+	u16 eir_len = 0;
+	size_t name_len;
+
+	if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
+		eir_len = eir_append_data(eir, eir_len, EIR_CLASS_OF_DEV,
+					  hdev->dev_class, 3);
+
+	if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
+		eir_len = eir_append_le16(eir, eir_len, EIR_APPEARANCE,
+					  hdev->appearance);
+
+	name_len = strlen(hdev->dev_name);
+	eir_len = eir_append_data(eir, eir_len, EIR_NAME_COMPLETE,
+				  hdev->dev_name, name_len);
+
+	name_len = strlen(hdev->short_name);
+	eir_len = eir_append_data(eir, eir_len, EIR_NAME_SHORT,
+				  hdev->short_name, name_len);
+
+	return eir_len;
+}
+
+static int read_ext_controller_info(struct sock *sk, struct hci_dev *hdev,
+				    void *data, u16 data_len)
+{
+	char buf[512];
+	struct mgmt_rp_read_ext_info *rp = (void *)buf;
+	u16 eir_len;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	memset(&buf, 0, sizeof(buf));
+
+	hci_dev_lock(hdev);
+
+	bacpy(&rp->bdaddr, &hdev->bdaddr);
+
+	rp->version = hdev->hci_ver;
+	rp->manufacturer = cpu_to_le16(hdev->manufacturer);
+
+	rp->supported_settings = cpu_to_le32(get_supported_settings(hdev));
+	rp->current_settings = cpu_to_le32(get_current_settings(hdev));
+
+
+	eir_len = append_eir_data_to_buf(hdev, rp->eir);
+	rp->eir_len = cpu_to_le16(eir_len);
+
+	hci_dev_unlock(hdev);
+
+	/* If this command is called at least once, then the events
+	 * for class of device and local name changes are disabled
+	 * and only the new extended controller information event
+	 * is used.
+	 */
+	hci_sock_set_flag(sk, HCI_MGMT_EXT_INFO_EVENTS);
+	hci_sock_clear_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS);
+	hci_sock_clear_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS);
+
+	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_EXT_INFO, 0, rp,
+				 sizeof(*rp) + eir_len);
+}
+
+static int ext_info_changed(struct hci_dev *hdev, struct sock *skip)
+{
+	char buf[512];
+	struct mgmt_ev_ext_info_changed *ev = (void *)buf;
+	u16 eir_len;
+
+	memset(buf, 0, sizeof(buf));
+
+	eir_len = append_eir_data_to_buf(hdev, ev->eir);
+	ev->eir_len = cpu_to_le16(eir_len);
+
+	return mgmt_limited_event(MGMT_EV_EXT_INFO_CHANGED, hdev, ev,
+				  sizeof(*ev) + eir_len,
+				  HCI_MGMT_EXT_INFO_EVENTS, skip);
+}
+
+static int send_settings_rsp(struct sock *sk, u16 opcode, struct hci_dev *hdev)
+{
+	__le32 settings = cpu_to_le32(get_current_settings(hdev));
+
+	return mgmt_cmd_complete(sk, hdev->id, opcode, 0, &settings,
+				 sizeof(settings));
+}
+
+static void clean_up_hci_complete(struct hci_dev *hdev, u8 status, u16 opcode)
+{
+	bt_dev_dbg(hdev, "status 0x%02x", status);
+
+	if (hci_conn_count(hdev) == 0) {
+		cancel_delayed_work(&hdev->power_off);
+		queue_work(hdev->req_workqueue, &hdev->power_off.work);
+	}
+}
+
+void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev, u8 instance)
+{
+	struct mgmt_ev_advertising_added ev;
+
+	ev.instance = instance;
+
+	mgmt_event(MGMT_EV_ADVERTISING_ADDED, hdev, &ev, sizeof(ev), sk);
+}
+
+void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
+			      u8 instance)
+{
+	struct mgmt_ev_advertising_removed ev;
+
+	ev.instance = instance;
+
+	mgmt_event(MGMT_EV_ADVERTISING_REMOVED, hdev, &ev, sizeof(ev), sk);
+}
+
+static void cancel_adv_timeout(struct hci_dev *hdev)
+{
+	if (hdev->adv_instance_timeout) {
+		hdev->adv_instance_timeout = 0;
+		cancel_delayed_work(&hdev->adv_instance_expire);
+	}
+}
+
+static int clean_up_hci_state(struct hci_dev *hdev)
+{
+	struct hci_request req;
+	struct hci_conn *conn;
+	bool discov_stopped;
+	int err;
+
+	hci_req_init(&req, hdev);
+
+	if (test_bit(HCI_ISCAN, &hdev->flags) ||
+	    test_bit(HCI_PSCAN, &hdev->flags)) {
+		u8 scan = 0x00;
+		hci_req_add(&req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
+	}
+
+	hci_req_clear_adv_instance(hdev, NULL, NULL, 0x00, false);
+
+	if (hci_dev_test_flag(hdev, HCI_LE_ADV))
+		__hci_req_disable_advertising(&req);
+
+	discov_stopped = hci_req_stop_discovery(&req);
+
+	list_for_each_entry(conn, &hdev->conn_hash.list, list) {
+		/* 0x15 == Terminated due to Power Off */
+		__hci_abort_conn(&req, conn, 0x15);
+	}
+
+	err = hci_req_run(&req, clean_up_hci_complete);
+	if (!err && discov_stopped)
+		hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
+
+	return err;
+}
+
+static int set_powered(struct sock *sk, struct hci_dev *hdev, void *data,
+		       u16 len)
+{
+	struct mgmt_mode *cp = data;
+	struct mgmt_pending_cmd *cmd;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (cp->val != 0x00 && cp->val != 0x01)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_POWERED,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	if (pending_find(MGMT_OP_SET_POWERED, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_POWERED,
+				      MGMT_STATUS_BUSY);
+		goto failed;
+	}
+
+	if (!!cp->val == hdev_is_powered(hdev)) {
+		err = send_settings_rsp(sk, MGMT_OP_SET_POWERED, hdev);
+		goto failed;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_SET_POWERED, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	if (cp->val) {
+		queue_work(hdev->req_workqueue, &hdev->power_on);
+		err = 0;
+	} else {
+		/* Disconnect connections, stop scans, etc */
+		err = clean_up_hci_state(hdev);
+		if (!err)
+			queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
+					   HCI_POWER_OFF_TIMEOUT);
+
+		/* ENODATA means there were no HCI commands queued */
+		if (err == -ENODATA) {
+			cancel_delayed_work(&hdev->power_off);
+			queue_work(hdev->req_workqueue, &hdev->power_off.work);
+			err = 0;
+		}
+	}
+
+failed:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int new_settings(struct hci_dev *hdev, struct sock *skip)
+{
+	__le32 ev = cpu_to_le32(get_current_settings(hdev));
+
+	return mgmt_limited_event(MGMT_EV_NEW_SETTINGS, hdev, &ev,
+				  sizeof(ev), HCI_MGMT_SETTING_EVENTS, skip);
+}
+
+int mgmt_new_settings(struct hci_dev *hdev)
+{
+	return new_settings(hdev, NULL);
+}
+
+struct cmd_lookup {
+	struct sock *sk;
+	struct hci_dev *hdev;
+	u8 mgmt_status;
+};
+
+static void settings_rsp(struct mgmt_pending_cmd *cmd, void *data)
+{
+	struct cmd_lookup *match = data;
+
+	send_settings_rsp(cmd->sk, cmd->opcode, match->hdev);
+
+	list_del(&cmd->list);
+
+	if (match->sk == NULL) {
+		match->sk = cmd->sk;
+		sock_hold(match->sk);
+	}
+
+	mgmt_pending_free(cmd);
+}
+
+static void cmd_status_rsp(struct mgmt_pending_cmd *cmd, void *data)
+{
+	u8 *status = data;
+
+	mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, *status);
+	mgmt_pending_remove(cmd);
+}
+
+static void cmd_complete_rsp(struct mgmt_pending_cmd *cmd, void *data)
+{
+	if (cmd->cmd_complete) {
+		u8 *status = data;
+
+		cmd->cmd_complete(cmd, *status);
+		mgmt_pending_remove(cmd);
+
+		return;
+	}
+
+	cmd_status_rsp(cmd, data);
+}
+
+static int generic_cmd_complete(struct mgmt_pending_cmd *cmd, u8 status)
+{
+	return mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, status,
+				 cmd->param, cmd->param_len);
+}
+
+static int addr_cmd_complete(struct mgmt_pending_cmd *cmd, u8 status)
+{
+	return mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, status,
+				 cmd->param, sizeof(struct mgmt_addr_info));
+}
+
+static u8 mgmt_bredr_support(struct hci_dev *hdev)
+{
+	if (!lmp_bredr_capable(hdev))
+		return MGMT_STATUS_NOT_SUPPORTED;
+	else if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
+		return MGMT_STATUS_REJECTED;
+	else
+		return MGMT_STATUS_SUCCESS;
+}
+
+static u8 mgmt_le_support(struct hci_dev *hdev)
+{
+	if (!lmp_le_capable(hdev))
+		return MGMT_STATUS_NOT_SUPPORTED;
+	else if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
+		return MGMT_STATUS_REJECTED;
+	else
+		return MGMT_STATUS_SUCCESS;
+}
+
+void mgmt_set_discoverable_complete(struct hci_dev *hdev, u8 status)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	bt_dev_dbg(hdev, "status 0x%02x", status);
+
+	hci_dev_lock(hdev);
+
+	cmd = pending_find(MGMT_OP_SET_DISCOVERABLE, hdev);
+	if (!cmd)
+		goto unlock;
+
+	if (status) {
+		u8 mgmt_err = mgmt_status(status);
+		mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, mgmt_err);
+		hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
+		goto remove_cmd;
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
+	    hdev->discov_timeout > 0) {
+		int to = msecs_to_jiffies(hdev->discov_timeout * 1000);
+		queue_delayed_work(hdev->req_workqueue, &hdev->discov_off, to);
+	}
+
+	send_settings_rsp(cmd->sk, MGMT_OP_SET_DISCOVERABLE, hdev);
+	new_settings(hdev, cmd->sk);
+
+remove_cmd:
+	mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int set_discoverable(struct sock *sk, struct hci_dev *hdev, void *data,
+			    u16 len)
+{
+	struct mgmt_cp_set_discoverable *cp = data;
+	struct mgmt_pending_cmd *cmd;
+	u16 timeout;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) &&
+	    !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
+				       MGMT_STATUS_REJECTED);
+
+	if (cp->val != 0x00 && cp->val != 0x01 && cp->val != 0x02)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	timeout = __le16_to_cpu(cp->timeout);
+
+	/* Disabling discoverable requires that no timeout is set,
+	 * and enabling limited discoverable requires a timeout.
+	 */
+	if ((cp->val == 0x00 && timeout > 0) ||
+	    (cp->val == 0x02 && timeout == 0))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev) && timeout > 0) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
+				      MGMT_STATUS_NOT_POWERED);
+		goto failed;
+	}
+
+	if (pending_find(MGMT_OP_SET_DISCOVERABLE, hdev) ||
+	    pending_find(MGMT_OP_SET_CONNECTABLE, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
+				      MGMT_STATUS_BUSY);
+		goto failed;
+	}
+
+	if (!hci_dev_test_flag(hdev, HCI_CONNECTABLE)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
+				      MGMT_STATUS_REJECTED);
+		goto failed;
+	}
+
+	if (hdev->advertising_paused) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
+				      MGMT_STATUS_BUSY);
+		goto failed;
+	}
+
+	if (!hdev_is_powered(hdev)) {
+		bool changed = false;
+
+		/* Setting limited discoverable when powered off is
+		 * not a valid operation since it requires a timeout
+		 * and so no need to check HCI_LIMITED_DISCOVERABLE.
+		 */
+		if (!!cp->val != hci_dev_test_flag(hdev, HCI_DISCOVERABLE)) {
+			hci_dev_change_flag(hdev, HCI_DISCOVERABLE);
+			changed = true;
+		}
+
+		err = send_settings_rsp(sk, MGMT_OP_SET_DISCOVERABLE, hdev);
+		if (err < 0)
+			goto failed;
+
+		if (changed)
+			err = new_settings(hdev, sk);
+
+		goto failed;
+	}
+
+	/* If the current mode is the same, then just update the timeout
+	 * value with the new value. And if only the timeout gets updated,
+	 * then no need for any HCI transactions.
+	 */
+	if (!!cp->val == hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
+	    (cp->val == 0x02) == hci_dev_test_flag(hdev,
+						   HCI_LIMITED_DISCOVERABLE)) {
+		cancel_delayed_work(&hdev->discov_off);
+		hdev->discov_timeout = timeout;
+
+		if (cp->val && hdev->discov_timeout > 0) {
+			int to = msecs_to_jiffies(hdev->discov_timeout * 1000);
+			queue_delayed_work(hdev->req_workqueue,
+					   &hdev->discov_off, to);
+		}
+
+		err = send_settings_rsp(sk, MGMT_OP_SET_DISCOVERABLE, hdev);
+		goto failed;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_SET_DISCOVERABLE, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	/* Cancel any potential discoverable timeout that might be
+	 * still active and store new timeout value. The arming of
+	 * the timeout happens in the complete handler.
+	 */
+	cancel_delayed_work(&hdev->discov_off);
+	hdev->discov_timeout = timeout;
+
+	if (cp->val)
+		hci_dev_set_flag(hdev, HCI_DISCOVERABLE);
+	else
+		hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
+
+	/* Limited discoverable mode */
+	if (cp->val == 0x02)
+		hci_dev_set_flag(hdev, HCI_LIMITED_DISCOVERABLE);
+	else
+		hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
+
+	queue_work(hdev->req_workqueue, &hdev->discoverable_update);
+	err = 0;
+
+failed:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+void mgmt_set_connectable_complete(struct hci_dev *hdev, u8 status)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	bt_dev_dbg(hdev, "status 0x%02x", status);
+
+	hci_dev_lock(hdev);
+
+	cmd = pending_find(MGMT_OP_SET_CONNECTABLE, hdev);
+	if (!cmd)
+		goto unlock;
+
+	if (status) {
+		u8 mgmt_err = mgmt_status(status);
+		mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, mgmt_err);
+		goto remove_cmd;
+	}
+
+	send_settings_rsp(cmd->sk, MGMT_OP_SET_CONNECTABLE, hdev);
+	new_settings(hdev, cmd->sk);
+
+remove_cmd:
+	mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int set_connectable_update_settings(struct hci_dev *hdev,
+					   struct sock *sk, u8 val)
+{
+	bool changed = false;
+	int err;
+
+	if (!!val != hci_dev_test_flag(hdev, HCI_CONNECTABLE))
+		changed = true;
+
+	if (val) {
+		hci_dev_set_flag(hdev, HCI_CONNECTABLE);
+	} else {
+		hci_dev_clear_flag(hdev, HCI_CONNECTABLE);
+		hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
+	}
+
+	err = send_settings_rsp(sk, MGMT_OP_SET_CONNECTABLE, hdev);
+	if (err < 0)
+		return err;
+
+	if (changed) {
+		hci_req_update_scan(hdev);
+		hci_update_background_scan(hdev);
+		return new_settings(hdev, sk);
+	}
+
+	return 0;
+}
+
+static int set_connectable(struct sock *sk, struct hci_dev *hdev, void *data,
+			   u16 len)
+{
+	struct mgmt_mode *cp = data;
+	struct mgmt_pending_cmd *cmd;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) &&
+	    !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_CONNECTABLE,
+				       MGMT_STATUS_REJECTED);
+
+	if (cp->val != 0x00 && cp->val != 0x01)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_CONNECTABLE,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		err = set_connectable_update_settings(hdev, sk, cp->val);
+		goto failed;
+	}
+
+	if (pending_find(MGMT_OP_SET_DISCOVERABLE, hdev) ||
+	    pending_find(MGMT_OP_SET_CONNECTABLE, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_CONNECTABLE,
+				      MGMT_STATUS_BUSY);
+		goto failed;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_SET_CONNECTABLE, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	if (cp->val) {
+		hci_dev_set_flag(hdev, HCI_CONNECTABLE);
+	} else {
+		if (hdev->discov_timeout > 0)
+			cancel_delayed_work(&hdev->discov_off);
+
+		hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
+		hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
+		hci_dev_clear_flag(hdev, HCI_CONNECTABLE);
+	}
+
+	queue_work(hdev->req_workqueue, &hdev->connectable_update);
+	err = 0;
+
+failed:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int set_bondable(struct sock *sk, struct hci_dev *hdev, void *data,
+			u16 len)
+{
+	struct mgmt_mode *cp = data;
+	bool changed;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (cp->val != 0x00 && cp->val != 0x01)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BONDABLE,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	if (cp->val)
+		changed = !hci_dev_test_and_set_flag(hdev, HCI_BONDABLE);
+	else
+		changed = hci_dev_test_and_clear_flag(hdev, HCI_BONDABLE);
+
+	err = send_settings_rsp(sk, MGMT_OP_SET_BONDABLE, hdev);
+	if (err < 0)
+		goto unlock;
+
+	if (changed) {
+		/* In limited privacy mode the change of bondable mode
+		 * may affect the local advertising address.
+		 */
+		if (hdev_is_powered(hdev) &&
+		    hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
+		    hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
+		    hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
+			queue_work(hdev->req_workqueue,
+				   &hdev->discoverable_update);
+
+		err = new_settings(hdev, sk);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int set_link_security(struct sock *sk, struct hci_dev *hdev, void *data,
+			     u16 len)
+{
+	struct mgmt_mode *cp = data;
+	struct mgmt_pending_cmd *cmd;
+	u8 val, status;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	status = mgmt_bredr_support(hdev);
+	if (status)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_LINK_SECURITY,
+				       status);
+
+	if (cp->val != 0x00 && cp->val != 0x01)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_LINK_SECURITY,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		bool changed = false;
+
+		if (!!cp->val != hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
+			hci_dev_change_flag(hdev, HCI_LINK_SECURITY);
+			changed = true;
+		}
+
+		err = send_settings_rsp(sk, MGMT_OP_SET_LINK_SECURITY, hdev);
+		if (err < 0)
+			goto failed;
+
+		if (changed)
+			err = new_settings(hdev, sk);
+
+		goto failed;
+	}
+
+	if (pending_find(MGMT_OP_SET_LINK_SECURITY, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_LINK_SECURITY,
+				      MGMT_STATUS_BUSY);
+		goto failed;
+	}
+
+	val = !!cp->val;
+
+	if (test_bit(HCI_AUTH, &hdev->flags) == val) {
+		err = send_settings_rsp(sk, MGMT_OP_SET_LINK_SECURITY, hdev);
+		goto failed;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_SET_LINK_SECURITY, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	err = hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, sizeof(val), &val);
+	if (err < 0) {
+		mgmt_pending_remove(cmd);
+		goto failed;
+	}
+
+failed:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int set_ssp(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
+{
+	struct mgmt_mode *cp = data;
+	struct mgmt_pending_cmd *cmd;
+	u8 status;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	status = mgmt_bredr_support(hdev);
+	if (status)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SSP, status);
+
+	if (!lmp_ssp_capable(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SSP,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	if (cp->val != 0x00 && cp->val != 0x01)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SSP,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		bool changed;
+
+		if (cp->val) {
+			changed = !hci_dev_test_and_set_flag(hdev,
+							     HCI_SSP_ENABLED);
+		} else {
+			changed = hci_dev_test_and_clear_flag(hdev,
+							      HCI_SSP_ENABLED);
+			if (!changed)
+				changed = hci_dev_test_and_clear_flag(hdev,
+								      HCI_HS_ENABLED);
+			else
+				hci_dev_clear_flag(hdev, HCI_HS_ENABLED);
+		}
+
+		err = send_settings_rsp(sk, MGMT_OP_SET_SSP, hdev);
+		if (err < 0)
+			goto failed;
+
+		if (changed)
+			err = new_settings(hdev, sk);
+
+		goto failed;
+	}
+
+	if (pending_find(MGMT_OP_SET_SSP, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SSP,
+				      MGMT_STATUS_BUSY);
+		goto failed;
+	}
+
+	if (!!cp->val == hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
+		err = send_settings_rsp(sk, MGMT_OP_SET_SSP, hdev);
+		goto failed;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_SET_SSP, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	if (!cp->val && hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS))
+		hci_send_cmd(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE,
+			     sizeof(cp->val), &cp->val);
+
+	err = hci_send_cmd(hdev, HCI_OP_WRITE_SSP_MODE, 1, &cp->val);
+	if (err < 0) {
+		mgmt_pending_remove(cmd);
+		goto failed;
+	}
+
+failed:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int set_hs(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
+{
+	struct mgmt_mode *cp = data;
+	bool changed;
+	u8 status;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!IS_ENABLED(CONFIG_BT_HS))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	status = mgmt_bredr_support(hdev);
+	if (status)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS, status);
+
+	if (!lmp_ssp_capable(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS,
+				       MGMT_STATUS_REJECTED);
+
+	if (cp->val != 0x00 && cp->val != 0x01)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	if (pending_find(MGMT_OP_SET_SSP, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS,
+				      MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	if (cp->val) {
+		changed = !hci_dev_test_and_set_flag(hdev, HCI_HS_ENABLED);
+	} else {
+		if (hdev_is_powered(hdev)) {
+			err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS,
+					      MGMT_STATUS_REJECTED);
+			goto unlock;
+		}
+
+		changed = hci_dev_test_and_clear_flag(hdev, HCI_HS_ENABLED);
+	}
+
+	err = send_settings_rsp(sk, MGMT_OP_SET_HS, hdev);
+	if (err < 0)
+		goto unlock;
+
+	if (changed)
+		err = new_settings(hdev, sk);
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static void le_enable_complete(struct hci_dev *hdev, u8 status, u16 opcode)
+{
+	struct cmd_lookup match = { NULL, hdev };
+
+	hci_dev_lock(hdev);
+
+	if (status) {
+		u8 mgmt_err = mgmt_status(status);
+
+		mgmt_pending_foreach(MGMT_OP_SET_LE, hdev, cmd_status_rsp,
+				     &mgmt_err);
+		goto unlock;
+	}
+
+	mgmt_pending_foreach(MGMT_OP_SET_LE, hdev, settings_rsp, &match);
+
+	new_settings(hdev, match.sk);
+
+	if (match.sk)
+		sock_put(match.sk);
+
+	/* Make sure the controller has a good default for
+	 * advertising data. Restrict the update to when LE
+	 * has actually been enabled. During power on, the
+	 * update in powered_update_hci will take care of it.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
+		struct hci_request req;
+		hci_req_init(&req, hdev);
+		if (ext_adv_capable(hdev)) {
+			int err;
+
+			err = __hci_req_setup_ext_adv_instance(&req, 0x00);
+			if (!err)
+				__hci_req_update_scan_rsp_data(&req, 0x00);
+		} else {
+			__hci_req_update_adv_data(&req, 0x00);
+			__hci_req_update_scan_rsp_data(&req, 0x00);
+		}
+		hci_req_run(&req, NULL);
+		hci_update_background_scan(hdev);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int set_le(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
+{
+	struct mgmt_mode *cp = data;
+	struct hci_cp_write_le_host_supported hci_cp;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_request req;
+	int err;
+	u8 val, enabled;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!lmp_le_capable(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_LE,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	if (cp->val != 0x00 && cp->val != 0x01)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_LE,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	/* Bluetooth single mode LE only controllers or dual-mode
+	 * controllers configured as LE only devices, do not allow
+	 * switching LE off. These have either LE enabled explicitly
+	 * or BR/EDR has been previously switched off.
+	 *
+	 * When trying to enable an already enabled LE, then gracefully
+	 * send a positive response. Trying to disable it however will
+	 * result into rejection.
+	 */
+	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
+		if (cp->val == 0x01)
+			return send_settings_rsp(sk, MGMT_OP_SET_LE, hdev);
+
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_LE,
+				       MGMT_STATUS_REJECTED);
+	}
+
+	hci_dev_lock(hdev);
+
+	val = !!cp->val;
+	enabled = lmp_host_le_capable(hdev);
+
+	if (!val)
+		hci_req_clear_adv_instance(hdev, NULL, NULL, 0x00, true);
+
+	if (!hdev_is_powered(hdev) || val == enabled) {
+		bool changed = false;
+
+		if (val != hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
+			hci_dev_change_flag(hdev, HCI_LE_ENABLED);
+			changed = true;
+		}
+
+		if (!val && hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
+			hci_dev_clear_flag(hdev, HCI_ADVERTISING);
+			changed = true;
+		}
+
+		err = send_settings_rsp(sk, MGMT_OP_SET_LE, hdev);
+		if (err < 0)
+			goto unlock;
+
+		if (changed)
+			err = new_settings(hdev, sk);
+
+		goto unlock;
+	}
+
+	if (pending_find(MGMT_OP_SET_LE, hdev) ||
+	    pending_find(MGMT_OP_SET_ADVERTISING, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_LE,
+				      MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_SET_LE, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	hci_req_init(&req, hdev);
+
+	memset(&hci_cp, 0, sizeof(hci_cp));
+
+	if (val) {
+		hci_cp.le = val;
+		hci_cp.simul = 0x00;
+	} else {
+		if (hci_dev_test_flag(hdev, HCI_LE_ADV))
+			__hci_req_disable_advertising(&req);
+
+		if (ext_adv_capable(hdev))
+			__hci_req_clear_ext_adv_sets(&req);
+	}
+
+	hci_req_add(&req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(hci_cp),
+		    &hci_cp);
+
+	err = hci_req_run(&req, le_enable_complete);
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+/* This is a helper function to test for pending mgmt commands that can
+ * cause CoD or EIR HCI commands. We can only allow one such pending
+ * mgmt command at a time since otherwise we cannot easily track what
+ * the current values are, will be, and based on that calculate if a new
+ * HCI command needs to be sent and if yes with what value.
+ */
+static bool pending_eir_or_class(struct hci_dev *hdev)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	list_for_each_entry(cmd, &hdev->mgmt_pending, list) {
+		switch (cmd->opcode) {
+		case MGMT_OP_ADD_UUID:
+		case MGMT_OP_REMOVE_UUID:
+		case MGMT_OP_SET_DEV_CLASS:
+		case MGMT_OP_SET_POWERED:
+			return true;
+		}
+	}
+
+	return false;
+}
+
+static const u8 bluetooth_base_uuid[] = {
+			0xfb, 0x34, 0x9b, 0x5f, 0x80, 0x00, 0x00, 0x80,
+			0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+};
+
+static u8 get_uuid_size(const u8 *uuid)
+{
+	u32 val;
+
+	if (memcmp(uuid, bluetooth_base_uuid, 12))
+		return 128;
+
+	val = get_unaligned_le32(&uuid[12]);
+	if (val > 0xffff)
+		return 32;
+
+	return 16;
+}
+
+static void mgmt_class_complete(struct hci_dev *hdev, u16 mgmt_op, u8 status)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	hci_dev_lock(hdev);
+
+	cmd = pending_find(mgmt_op, hdev);
+	if (!cmd)
+		goto unlock;
+
+	mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode,
+			  mgmt_status(status), hdev->dev_class, 3);
+
+	mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static void add_uuid_complete(struct hci_dev *hdev, u8 status, u16 opcode)
+{
+	bt_dev_dbg(hdev, "status 0x%02x", status);
+
+	mgmt_class_complete(hdev, MGMT_OP_ADD_UUID, status);
+}
+
+static int add_uuid(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
+{
+	struct mgmt_cp_add_uuid *cp = data;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_request req;
+	struct bt_uuid *uuid;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	hci_dev_lock(hdev);
+
+	if (pending_eir_or_class(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_UUID,
+				      MGMT_STATUS_BUSY);
+		goto failed;
+	}
+
+	uuid = kmalloc(sizeof(*uuid), GFP_KERNEL);
+	if (!uuid) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	memcpy(uuid->uuid, cp->uuid, 16);
+	uuid->svc_hint = cp->svc_hint;
+	uuid->size = get_uuid_size(cp->uuid);
+
+	list_add_tail(&uuid->list, &hdev->uuids);
+
+	hci_req_init(&req, hdev);
+
+	__hci_req_update_class(&req);
+	__hci_req_update_eir(&req);
+
+	err = hci_req_run(&req, add_uuid_complete);
+	if (err < 0) {
+		if (err != -ENODATA)
+			goto failed;
+
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_ADD_UUID, 0,
+					hdev->dev_class, 3);
+		goto failed;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_ADD_UUID, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	err = 0;
+
+failed:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static bool enable_service_cache(struct hci_dev *hdev)
+{
+	if (!hdev_is_powered(hdev))
+		return false;
+
+	if (!hci_dev_test_and_set_flag(hdev, HCI_SERVICE_CACHE)) {
+		queue_delayed_work(hdev->workqueue, &hdev->service_cache,
+				   CACHE_TIMEOUT);
+		return true;
+	}
+
+	return false;
+}
+
+static void remove_uuid_complete(struct hci_dev *hdev, u8 status, u16 opcode)
+{
+	bt_dev_dbg(hdev, "status 0x%02x", status);
+
+	mgmt_class_complete(hdev, MGMT_OP_REMOVE_UUID, status);
+}
+
+static int remove_uuid(struct sock *sk, struct hci_dev *hdev, void *data,
+		       u16 len)
+{
+	struct mgmt_cp_remove_uuid *cp = data;
+	struct mgmt_pending_cmd *cmd;
+	struct bt_uuid *match, *tmp;
+	u8 bt_uuid_any[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+	struct hci_request req;
+	int err, found;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	hci_dev_lock(hdev);
+
+	if (pending_eir_or_class(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_REMOVE_UUID,
+				      MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	if (memcmp(cp->uuid, bt_uuid_any, 16) == 0) {
+		hci_uuids_clear(hdev);
+
+		if (enable_service_cache(hdev)) {
+			err = mgmt_cmd_complete(sk, hdev->id,
+						MGMT_OP_REMOVE_UUID,
+						0, hdev->dev_class, 3);
+			goto unlock;
+		}
+
+		goto update_class;
+	}
+
+	found = 0;
+
+	list_for_each_entry_safe(match, tmp, &hdev->uuids, list) {
+		if (memcmp(match->uuid, cp->uuid, 16) != 0)
+			continue;
+
+		list_del(&match->list);
+		kfree(match);
+		found++;
+	}
+
+	if (found == 0) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_REMOVE_UUID,
+				      MGMT_STATUS_INVALID_PARAMS);
+		goto unlock;
+	}
+
+update_class:
+	hci_req_init(&req, hdev);
+
+	__hci_req_update_class(&req);
+	__hci_req_update_eir(&req);
+
+	err = hci_req_run(&req, remove_uuid_complete);
+	if (err < 0) {
+		if (err != -ENODATA)
+			goto unlock;
+
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_REMOVE_UUID, 0,
+					hdev->dev_class, 3);
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_REMOVE_UUID, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	err = 0;
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static void set_class_complete(struct hci_dev *hdev, u8 status, u16 opcode)
+{
+	bt_dev_dbg(hdev, "status 0x%02x", status);
+
+	mgmt_class_complete(hdev, MGMT_OP_SET_DEV_CLASS, status);
+}
+
+static int set_dev_class(struct sock *sk, struct hci_dev *hdev, void *data,
+			 u16 len)
+{
+	struct mgmt_cp_set_dev_class *cp = data;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_request req;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!lmp_bredr_capable(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DEV_CLASS,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	hci_dev_lock(hdev);
+
+	if (pending_eir_or_class(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DEV_CLASS,
+				      MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	if ((cp->minor & 0x03) != 0 || (cp->major & 0xe0) != 0) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DEV_CLASS,
+				      MGMT_STATUS_INVALID_PARAMS);
+		goto unlock;
+	}
+
+	hdev->major_class = cp->major;
+	hdev->minor_class = cp->minor;
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_DEV_CLASS, 0,
+					hdev->dev_class, 3);
+		goto unlock;
+	}
+
+	hci_req_init(&req, hdev);
+
+	if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE)) {
+		hci_dev_unlock(hdev);
+		cancel_delayed_work_sync(&hdev->service_cache);
+		hci_dev_lock(hdev);
+		__hci_req_update_eir(&req);
+	}
+
+	__hci_req_update_class(&req);
+
+	err = hci_req_run(&req, set_class_complete);
+	if (err < 0) {
+		if (err != -ENODATA)
+			goto unlock;
+
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_DEV_CLASS, 0,
+					hdev->dev_class, 3);
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_SET_DEV_CLASS, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	err = 0;
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int load_link_keys(struct sock *sk, struct hci_dev *hdev, void *data,
+			  u16 len)
+{
+	struct mgmt_cp_load_link_keys *cp = data;
+	const u16 max_key_count = ((U16_MAX - sizeof(*cp)) /
+				   sizeof(struct mgmt_link_key_info));
+	u16 key_count, expected_len;
+	bool changed;
+	int i;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!lmp_bredr_capable(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_LINK_KEYS,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	key_count = __le16_to_cpu(cp->key_count);
+	if (key_count > max_key_count) {
+		bt_dev_err(hdev, "load_link_keys: too big key_count value %u",
+			   key_count);
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_LINK_KEYS,
+				       MGMT_STATUS_INVALID_PARAMS);
+	}
+
+	expected_len = struct_size(cp, keys, key_count);
+	if (expected_len != len) {
+		bt_dev_err(hdev, "load_link_keys: expected %u bytes, got %u bytes",
+			   expected_len, len);
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_LINK_KEYS,
+				       MGMT_STATUS_INVALID_PARAMS);
+	}
+
+	if (cp->debug_keys != 0x00 && cp->debug_keys != 0x01)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_LINK_KEYS,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	bt_dev_dbg(hdev, "debug_keys %u key_count %u", cp->debug_keys,
+		   key_count);
+
+	for (i = 0; i < key_count; i++) {
+		struct mgmt_link_key_info *key = &cp->keys[i];
+
+		/* Considering SMP over BREDR/LE, there is no need to check addr_type */
+		if (key->type > 0x08)
+			return mgmt_cmd_status(sk, hdev->id,
+					       MGMT_OP_LOAD_LINK_KEYS,
+					       MGMT_STATUS_INVALID_PARAMS);
+	}
+
+	hci_dev_lock(hdev);
+
+	hci_link_keys_clear(hdev);
+
+	if (cp->debug_keys)
+		changed = !hci_dev_test_and_set_flag(hdev, HCI_KEEP_DEBUG_KEYS);
+	else
+		changed = hci_dev_test_and_clear_flag(hdev,
+						      HCI_KEEP_DEBUG_KEYS);
+
+	if (changed)
+		new_settings(hdev, NULL);
+
+	for (i = 0; i < key_count; i++) {
+		struct mgmt_link_key_info *key = &cp->keys[i];
+
+		if (hci_is_blocked_key(hdev,
+				       HCI_BLOCKED_KEY_TYPE_LINKKEY,
+				       key->val)) {
+			bt_dev_warn(hdev, "Skipping blocked link key for %pMR",
+				    &key->addr.bdaddr);
+			continue;
+		}
+
+		/* Always ignore debug keys and require a new pairing if
+		 * the user wants to use them.
+		 */
+		if (key->type == HCI_LK_DEBUG_COMBINATION)
+			continue;
+
+		hci_add_link_key(hdev, NULL, &key->addr.bdaddr, key->val,
+				 key->type, key->pin_len, NULL);
+	}
+
+	mgmt_cmd_complete(sk, hdev->id, MGMT_OP_LOAD_LINK_KEYS, 0, NULL, 0);
+
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+static int device_unpaired(struct hci_dev *hdev, bdaddr_t *bdaddr,
+			   u8 addr_type, struct sock *skip_sk)
+{
+	struct mgmt_ev_device_unpaired ev;
+
+	bacpy(&ev.addr.bdaddr, bdaddr);
+	ev.addr.type = addr_type;
+
+	return mgmt_event(MGMT_EV_DEVICE_UNPAIRED, hdev, &ev, sizeof(ev),
+			  skip_sk);
+}
+
+static int unpair_device(struct sock *sk, struct hci_dev *hdev, void *data,
+			 u16 len)
+{
+	struct mgmt_cp_unpair_device *cp = data;
+	struct mgmt_rp_unpair_device rp;
+	struct hci_conn_params *params;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_conn *conn;
+	u8 addr_type;
+	int err;
+
+	memset(&rp, 0, sizeof(rp));
+	bacpy(&rp.addr.bdaddr, &cp->addr.bdaddr);
+	rp.addr.type = cp->addr.type;
+
+	if (!bdaddr_type_is_valid(cp->addr.type))
+		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_UNPAIR_DEVICE,
+					 MGMT_STATUS_INVALID_PARAMS,
+					 &rp, sizeof(rp));
+
+	if (cp->disconnect != 0x00 && cp->disconnect != 0x01)
+		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_UNPAIR_DEVICE,
+					 MGMT_STATUS_INVALID_PARAMS,
+					 &rp, sizeof(rp));
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_UNPAIR_DEVICE,
+					MGMT_STATUS_NOT_POWERED, &rp,
+					sizeof(rp));
+		goto unlock;
+	}
+
+	if (cp->addr.type == BDADDR_BREDR) {
+		/* If disconnection is requested, then look up the
+		 * connection. If the remote device is connected, it
+		 * will be later used to terminate the link.
+		 *
+		 * Setting it to NULL explicitly will cause no
+		 * termination of the link.
+		 */
+		if (cp->disconnect)
+			conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK,
+						       &cp->addr.bdaddr);
+		else
+			conn = NULL;
+
+		err = hci_remove_link_key(hdev, &cp->addr.bdaddr);
+		if (err < 0) {
+			err = mgmt_cmd_complete(sk, hdev->id,
+						MGMT_OP_UNPAIR_DEVICE,
+						MGMT_STATUS_NOT_PAIRED, &rp,
+						sizeof(rp));
+			goto unlock;
+		}
+
+		goto done;
+	}
+
+	/* LE address type */
+	addr_type = le_addr_type(cp->addr.type);
+
+	/* Abort any ongoing SMP pairing. Removes ltk and irk if they exist. */
+	err = smp_cancel_and_remove_pairing(hdev, &cp->addr.bdaddr, addr_type);
+	if (err < 0) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_UNPAIR_DEVICE,
+					MGMT_STATUS_NOT_PAIRED, &rp,
+					sizeof(rp));
+		goto unlock;
+	}
+
+	conn = hci_conn_hash_lookup_le(hdev, &cp->addr.bdaddr, addr_type);
+	if (!conn) {
+		hci_conn_params_del(hdev, &cp->addr.bdaddr, addr_type);
+		goto done;
+	}
+
+
+	/* Defer clearing up the connection parameters until closing to
+	 * give a chance of keeping them if a repairing happens.
+	 */
+	set_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags);
+
+	/* Disable auto-connection parameters if present */
+	params = hci_conn_params_lookup(hdev, &cp->addr.bdaddr, addr_type);
+	if (params) {
+		if (params->explicit_connect)
+			params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
+		else
+			params->auto_connect = HCI_AUTO_CONN_DISABLED;
+	}
+
+	/* If disconnection is not requested, then clear the connection
+	 * variable so that the link is not terminated.
+	 */
+	if (!cp->disconnect)
+		conn = NULL;
+
+done:
+	/* If the connection variable is set, then termination of the
+	 * link is requested.
+	 */
+	if (!conn) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_UNPAIR_DEVICE, 0,
+					&rp, sizeof(rp));
+		device_unpaired(hdev, &cp->addr.bdaddr, cp->addr.type, sk);
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_UNPAIR_DEVICE, hdev, cp,
+			       sizeof(*cp));
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	cmd->cmd_complete = addr_cmd_complete;
+
+	err = hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM);
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int disconnect(struct sock *sk, struct hci_dev *hdev, void *data,
+		      u16 len)
+{
+	struct mgmt_cp_disconnect *cp = data;
+	struct mgmt_rp_disconnect rp;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_conn *conn;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	memset(&rp, 0, sizeof(rp));
+	bacpy(&rp.addr.bdaddr, &cp->addr.bdaddr);
+	rp.addr.type = cp->addr.type;
+
+	if (!bdaddr_type_is_valid(cp->addr.type))
+		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_DISCONNECT,
+					 MGMT_STATUS_INVALID_PARAMS,
+					 &rp, sizeof(rp));
+
+	hci_dev_lock(hdev);
+
+	if (!test_bit(HCI_UP, &hdev->flags)) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_DISCONNECT,
+					MGMT_STATUS_NOT_POWERED, &rp,
+					sizeof(rp));
+		goto failed;
+	}
+
+	if (pending_find(MGMT_OP_DISCONNECT, hdev)) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_DISCONNECT,
+					MGMT_STATUS_BUSY, &rp, sizeof(rp));
+		goto failed;
+	}
+
+	if (cp->addr.type == BDADDR_BREDR)
+		conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK,
+					       &cp->addr.bdaddr);
+	else
+		conn = hci_conn_hash_lookup_le(hdev, &cp->addr.bdaddr,
+					       le_addr_type(cp->addr.type));
+
+	if (!conn || conn->state == BT_OPEN || conn->state == BT_CLOSED) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_DISCONNECT,
+					MGMT_STATUS_NOT_CONNECTED, &rp,
+					sizeof(rp));
+		goto failed;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_DISCONNECT, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	cmd->cmd_complete = generic_cmd_complete;
+
+	err = hci_disconnect(conn, HCI_ERROR_REMOTE_USER_TERM);
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+failed:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static u8 link_to_bdaddr(u8 link_type, u8 addr_type)
+{
+	switch (link_type) {
+	case LE_LINK:
+		switch (addr_type) {
+		case ADDR_LE_DEV_PUBLIC:
+			return BDADDR_LE_PUBLIC;
+
+		default:
+			/* Fallback to LE Random address type */
+			return BDADDR_LE_RANDOM;
+		}
+
+	default:
+		/* Fallback to BR/EDR type */
+		return BDADDR_BREDR;
+	}
+}
+
+static int get_connections(struct sock *sk, struct hci_dev *hdev, void *data,
+			   u16 data_len)
+{
+	struct mgmt_rp_get_connections *rp;
+	struct hci_conn *c;
+	int err;
+	u16 i;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_GET_CONNECTIONS,
+				      MGMT_STATUS_NOT_POWERED);
+		goto unlock;
+	}
+
+	i = 0;
+	list_for_each_entry(c, &hdev->conn_hash.list, list) {
+		if (test_bit(HCI_CONN_MGMT_CONNECTED, &c->flags))
+			i++;
+	}
+
+	rp = kmalloc(struct_size(rp, addr, i), GFP_KERNEL);
+	if (!rp) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	i = 0;
+	list_for_each_entry(c, &hdev->conn_hash.list, list) {
+		if (!test_bit(HCI_CONN_MGMT_CONNECTED, &c->flags))
+			continue;
+		bacpy(&rp->addr[i].bdaddr, &c->dst);
+		rp->addr[i].type = link_to_bdaddr(c->type, c->dst_type);
+		if (c->type == SCO_LINK || c->type == ESCO_LINK)
+			continue;
+		i++;
+	}
+
+	rp->conn_count = cpu_to_le16(i);
+
+	/* Recalculate length in case of filtered SCO connections, etc */
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CONNECTIONS, 0, rp,
+				struct_size(rp, addr, i));
+
+	kfree(rp);
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int send_pin_code_neg_reply(struct sock *sk, struct hci_dev *hdev,
+				   struct mgmt_cp_pin_code_neg_reply *cp)
+{
+	struct mgmt_pending_cmd *cmd;
+	int err;
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_PIN_CODE_NEG_REPLY, hdev, cp,
+			       sizeof(*cp));
+	if (!cmd)
+		return -ENOMEM;
+
+	cmd->cmd_complete = addr_cmd_complete;
+
+	err = hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY,
+			   sizeof(cp->addr.bdaddr), &cp->addr.bdaddr);
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+	return err;
+}
+
+static int pin_code_reply(struct sock *sk, struct hci_dev *hdev, void *data,
+			  u16 len)
+{
+	struct hci_conn *conn;
+	struct mgmt_cp_pin_code_reply *cp = data;
+	struct hci_cp_pin_code_reply reply;
+	struct mgmt_pending_cmd *cmd;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_PIN_CODE_REPLY,
+				      MGMT_STATUS_NOT_POWERED);
+		goto failed;
+	}
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->addr.bdaddr);
+	if (!conn) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_PIN_CODE_REPLY,
+				      MGMT_STATUS_NOT_CONNECTED);
+		goto failed;
+	}
+
+	if (conn->pending_sec_level == BT_SECURITY_HIGH && cp->pin_len != 16) {
+		struct mgmt_cp_pin_code_neg_reply ncp;
+
+		memcpy(&ncp.addr, &cp->addr, sizeof(ncp.addr));
+
+		bt_dev_err(hdev, "PIN code is not 16 bytes long");
+
+		err = send_pin_code_neg_reply(sk, hdev, &ncp);
+		if (err >= 0)
+			err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_PIN_CODE_REPLY,
+					      MGMT_STATUS_INVALID_PARAMS);
+
+		goto failed;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_PIN_CODE_REPLY, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	cmd->cmd_complete = addr_cmd_complete;
+
+	bacpy(&reply.bdaddr, &cp->addr.bdaddr);
+	reply.pin_len = cp->pin_len;
+	memcpy(reply.pin_code, cp->pin_code, sizeof(reply.pin_code));
+
+	err = hci_send_cmd(hdev, HCI_OP_PIN_CODE_REPLY, sizeof(reply), &reply);
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+failed:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int set_io_capability(struct sock *sk, struct hci_dev *hdev, void *data,
+			     u16 len)
+{
+	struct mgmt_cp_set_io_capability *cp = data;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (cp->io_capability > SMP_IO_KEYBOARD_DISPLAY)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_IO_CAPABILITY,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	hdev->io_capability = cp->io_capability;
+
+	bt_dev_dbg(hdev, "IO capability set to 0x%02x", hdev->io_capability);
+
+	hci_dev_unlock(hdev);
+
+	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_IO_CAPABILITY, 0,
+				 NULL, 0);
+}
+
+static struct mgmt_pending_cmd *find_pairing(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct mgmt_pending_cmd *cmd;
+
+	list_for_each_entry(cmd, &hdev->mgmt_pending, list) {
+		if (cmd->opcode != MGMT_OP_PAIR_DEVICE)
+			continue;
+
+		if (cmd->user_data != conn)
+			continue;
+
+		return cmd;
+	}
+
+	return NULL;
+}
+
+static int pairing_complete(struct mgmt_pending_cmd *cmd, u8 status)
+{
+	struct mgmt_rp_pair_device rp;
+	struct hci_conn *conn = cmd->user_data;
+	int err;
+
+	bacpy(&rp.addr.bdaddr, &conn->dst);
+	rp.addr.type = link_to_bdaddr(conn->type, conn->dst_type);
+
+	err = mgmt_cmd_complete(cmd->sk, cmd->index, MGMT_OP_PAIR_DEVICE,
+				status, &rp, sizeof(rp));
+
+	/* So we don't get further callbacks for this connection */
+	conn->connect_cfm_cb = NULL;
+	conn->security_cfm_cb = NULL;
+	conn->disconn_cfm_cb = NULL;
+
+	hci_conn_drop(conn);
+
+	/* The device is paired so there is no need to remove
+	 * its connection parameters anymore.
+	 */
+	clear_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags);
+
+	hci_conn_put(conn);
+
+	return err;
+}
+
+void mgmt_smp_complete(struct hci_conn *conn, bool complete)
+{
+	u8 status = complete ? MGMT_STATUS_SUCCESS : MGMT_STATUS_FAILED;
+	struct mgmt_pending_cmd *cmd;
+
+	cmd = find_pairing(conn);
+	if (cmd) {
+		cmd->cmd_complete(cmd, status);
+		mgmt_pending_remove(cmd);
+	}
+}
+
+static void pairing_complete_cb(struct hci_conn *conn, u8 status)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	BT_DBG("status %u", status);
+
+	cmd = find_pairing(conn);
+	if (!cmd) {
+		BT_DBG("Unable to find a pending command");
+		return;
+	}
+
+	cmd->cmd_complete(cmd, mgmt_status(status));
+	mgmt_pending_remove(cmd);
+}
+
+static void le_pairing_complete_cb(struct hci_conn *conn, u8 status)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	BT_DBG("status %u", status);
+
+	if (!status)
+		return;
+
+	cmd = find_pairing(conn);
+	if (!cmd) {
+		BT_DBG("Unable to find a pending command");
+		return;
+	}
+
+	cmd->cmd_complete(cmd, mgmt_status(status));
+	mgmt_pending_remove(cmd);
+}
+
+static int pair_device(struct sock *sk, struct hci_dev *hdev, void *data,
+		       u16 len)
+{
+	struct mgmt_cp_pair_device *cp = data;
+	struct mgmt_rp_pair_device rp;
+	struct mgmt_pending_cmd *cmd;
+	u8 sec_level, auth_type;
+	struct hci_conn *conn;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	memset(&rp, 0, sizeof(rp));
+	bacpy(&rp.addr.bdaddr, &cp->addr.bdaddr);
+	rp.addr.type = cp->addr.type;
+
+	if (!bdaddr_type_is_valid(cp->addr.type))
+		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_PAIR_DEVICE,
+					 MGMT_STATUS_INVALID_PARAMS,
+					 &rp, sizeof(rp));
+
+	if (cp->io_cap > SMP_IO_KEYBOARD_DISPLAY)
+		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_PAIR_DEVICE,
+					 MGMT_STATUS_INVALID_PARAMS,
+					 &rp, sizeof(rp));
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_PAIR_DEVICE,
+					MGMT_STATUS_NOT_POWERED, &rp,
+					sizeof(rp));
+		goto unlock;
+	}
+
+	if (hci_bdaddr_is_paired(hdev, &cp->addr.bdaddr, cp->addr.type)) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_PAIR_DEVICE,
+					MGMT_STATUS_ALREADY_PAIRED, &rp,
+					sizeof(rp));
+		goto unlock;
+	}
+
+	sec_level = BT_SECURITY_MEDIUM;
+	auth_type = HCI_AT_DEDICATED_BONDING;
+
+	if (cp->addr.type == BDADDR_BREDR) {
+		conn = hci_connect_acl(hdev, &cp->addr.bdaddr, sec_level,
+				       auth_type, CONN_REASON_PAIR_DEVICE);
+	} else {
+		u8 addr_type = le_addr_type(cp->addr.type);
+		struct hci_conn_params *p;
+
+		/* When pairing a new device, it is expected to remember
+		 * this device for future connections. Adding the connection
+		 * parameter information ahead of time allows tracking
+		 * of the slave preferred values and will speed up any
+		 * further connection establishment.
+		 *
+		 * If connection parameters already exist, then they
+		 * will be kept and this function does nothing.
+		 */
+		p = hci_conn_params_add(hdev, &cp->addr.bdaddr, addr_type);
+
+		if (p->auto_connect == HCI_AUTO_CONN_EXPLICIT)
+			p->auto_connect = HCI_AUTO_CONN_DISABLED;
+
+		conn = hci_connect_le_scan(hdev, &cp->addr.bdaddr, addr_type,
+					   sec_level, HCI_LE_CONN_TIMEOUT,
+					   CONN_REASON_PAIR_DEVICE);
+	}
+
+	if (IS_ERR(conn)) {
+		int status;
+
+		if (PTR_ERR(conn) == -EBUSY)
+			status = MGMT_STATUS_BUSY;
+		else if (PTR_ERR(conn) == -EOPNOTSUPP)
+			status = MGMT_STATUS_NOT_SUPPORTED;
+		else if (PTR_ERR(conn) == -ECONNREFUSED)
+			status = MGMT_STATUS_REJECTED;
+		else
+			status = MGMT_STATUS_CONNECT_FAILED;
+
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_PAIR_DEVICE,
+					status, &rp, sizeof(rp));
+		goto unlock;
+	}
+
+	if (conn->connect_cfm_cb) {
+		hci_conn_drop(conn);
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_PAIR_DEVICE,
+					MGMT_STATUS_BUSY, &rp, sizeof(rp));
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_PAIR_DEVICE, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		hci_conn_drop(conn);
+		goto unlock;
+	}
+
+	cmd->cmd_complete = pairing_complete;
+
+	/* For LE, just connecting isn't a proof that the pairing finished */
+	if (cp->addr.type == BDADDR_BREDR) {
+		conn->connect_cfm_cb = pairing_complete_cb;
+		conn->security_cfm_cb = pairing_complete_cb;
+		conn->disconn_cfm_cb = pairing_complete_cb;
+	} else {
+		conn->connect_cfm_cb = le_pairing_complete_cb;
+		conn->security_cfm_cb = le_pairing_complete_cb;
+		conn->disconn_cfm_cb = le_pairing_complete_cb;
+	}
+
+	conn->io_capability = cp->io_cap;
+	cmd->user_data = hci_conn_get(conn);
+
+	if ((conn->state == BT_CONNECTED || conn->state == BT_CONFIG) &&
+	    hci_conn_security(conn, sec_level, auth_type, true)) {
+		cmd->cmd_complete(cmd, 0);
+		mgmt_pending_remove(cmd);
+	}
+
+	err = 0;
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int cancel_pair_device(struct sock *sk, struct hci_dev *hdev, void *data,
+			      u16 len)
+{
+	struct mgmt_addr_info *addr = data;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_conn *conn;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_CANCEL_PAIR_DEVICE,
+				      MGMT_STATUS_NOT_POWERED);
+		goto unlock;
+	}
+
+	cmd = pending_find(MGMT_OP_PAIR_DEVICE, hdev);
+	if (!cmd) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_CANCEL_PAIR_DEVICE,
+				      MGMT_STATUS_INVALID_PARAMS);
+		goto unlock;
+	}
+
+	conn = cmd->user_data;
+
+	if (bacmp(&addr->bdaddr, &conn->dst) != 0) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_CANCEL_PAIR_DEVICE,
+				      MGMT_STATUS_INVALID_PARAMS);
+		goto unlock;
+	}
+
+	cmd->cmd_complete(cmd, MGMT_STATUS_CANCELLED);
+	mgmt_pending_remove(cmd);
+
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_CANCEL_PAIR_DEVICE, 0,
+				addr, sizeof(*addr));
+
+	/* Since user doesn't want to proceed with the connection, abort any
+	 * ongoing pairing and then terminate the link if it was created
+	 * because of the pair device action.
+	 */
+	if (addr->type == BDADDR_BREDR)
+		hci_remove_link_key(hdev, &addr->bdaddr);
+	else
+		smp_cancel_and_remove_pairing(hdev, &addr->bdaddr,
+					      le_addr_type(addr->type));
+
+	if (conn->conn_reason == CONN_REASON_PAIR_DEVICE)
+		hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM);
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int user_pairing_resp(struct sock *sk, struct hci_dev *hdev,
+			     struct mgmt_addr_info *addr, u16 mgmt_op,
+			     u16 hci_op, __le32 passkey)
+{
+	struct mgmt_pending_cmd *cmd;
+	struct hci_conn *conn;
+	int err;
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_complete(sk, hdev->id, mgmt_op,
+					MGMT_STATUS_NOT_POWERED, addr,
+					sizeof(*addr));
+		goto done;
+	}
+
+	if (addr->type == BDADDR_BREDR)
+		conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &addr->bdaddr);
+	else
+		conn = hci_conn_hash_lookup_le(hdev, &addr->bdaddr,
+					       le_addr_type(addr->type));
+
+	if (!conn) {
+		err = mgmt_cmd_complete(sk, hdev->id, mgmt_op,
+					MGMT_STATUS_NOT_CONNECTED, addr,
+					sizeof(*addr));
+		goto done;
+	}
+
+	if (addr->type == BDADDR_LE_PUBLIC || addr->type == BDADDR_LE_RANDOM) {
+		err = smp_user_confirm_reply(conn, mgmt_op, passkey);
+		if (!err)
+			err = mgmt_cmd_complete(sk, hdev->id, mgmt_op,
+						MGMT_STATUS_SUCCESS, addr,
+						sizeof(*addr));
+		else
+			err = mgmt_cmd_complete(sk, hdev->id, mgmt_op,
+						MGMT_STATUS_FAILED, addr,
+						sizeof(*addr));
+
+		goto done;
+	}
+
+	cmd = mgmt_pending_add(sk, mgmt_op, hdev, addr, sizeof(*addr));
+	if (!cmd) {
+		err = -ENOMEM;
+		goto done;
+	}
+
+	cmd->cmd_complete = addr_cmd_complete;
+
+	/* Continue with pairing via HCI */
+	if (hci_op == HCI_OP_USER_PASSKEY_REPLY) {
+		struct hci_cp_user_passkey_reply cp;
+
+		bacpy(&cp.bdaddr, &addr->bdaddr);
+		cp.passkey = passkey;
+		err = hci_send_cmd(hdev, hci_op, sizeof(cp), &cp);
+	} else
+		err = hci_send_cmd(hdev, hci_op, sizeof(addr->bdaddr),
+				   &addr->bdaddr);
+
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+done:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int pin_code_neg_reply(struct sock *sk, struct hci_dev *hdev,
+			      void *data, u16 len)
+{
+	struct mgmt_cp_pin_code_neg_reply *cp = data;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	return user_pairing_resp(sk, hdev, &cp->addr,
+				MGMT_OP_PIN_CODE_NEG_REPLY,
+				HCI_OP_PIN_CODE_NEG_REPLY, 0);
+}
+
+static int user_confirm_reply(struct sock *sk, struct hci_dev *hdev, void *data,
+			      u16 len)
+{
+	struct mgmt_cp_user_confirm_reply *cp = data;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (len != sizeof(*cp))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_USER_CONFIRM_REPLY,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	return user_pairing_resp(sk, hdev, &cp->addr,
+				 MGMT_OP_USER_CONFIRM_REPLY,
+				 HCI_OP_USER_CONFIRM_REPLY, 0);
+}
+
+static int user_confirm_neg_reply(struct sock *sk, struct hci_dev *hdev,
+				  void *data, u16 len)
+{
+	struct mgmt_cp_user_confirm_neg_reply *cp = data;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	return user_pairing_resp(sk, hdev, &cp->addr,
+				 MGMT_OP_USER_CONFIRM_NEG_REPLY,
+				 HCI_OP_USER_CONFIRM_NEG_REPLY, 0);
+}
+
+static int user_passkey_reply(struct sock *sk, struct hci_dev *hdev, void *data,
+			      u16 len)
+{
+	struct mgmt_cp_user_passkey_reply *cp = data;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	return user_pairing_resp(sk, hdev, &cp->addr,
+				 MGMT_OP_USER_PASSKEY_REPLY,
+				 HCI_OP_USER_PASSKEY_REPLY, cp->passkey);
+}
+
+static int user_passkey_neg_reply(struct sock *sk, struct hci_dev *hdev,
+				  void *data, u16 len)
+{
+	struct mgmt_cp_user_passkey_neg_reply *cp = data;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	return user_pairing_resp(sk, hdev, &cp->addr,
+				 MGMT_OP_USER_PASSKEY_NEG_REPLY,
+				 HCI_OP_USER_PASSKEY_NEG_REPLY, 0);
+}
+
+static void adv_expire(struct hci_dev *hdev, u32 flags)
+{
+	struct adv_info *adv_instance;
+	struct hci_request req;
+	int err;
+
+	adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
+	if (!adv_instance)
+		return;
+
+	/* stop if current instance doesn't need to be changed */
+	if (!(adv_instance->flags & flags))
+		return;
+
+	cancel_adv_timeout(hdev);
+
+	adv_instance = hci_get_next_instance(hdev, adv_instance->instance);
+	if (!adv_instance)
+		return;
+
+	hci_req_init(&req, hdev);
+	err = __hci_req_schedule_adv_instance(&req, adv_instance->instance,
+					      true);
+	if (err)
+		return;
+
+	hci_req_run(&req, NULL);
+}
+
+static void set_name_complete(struct hci_dev *hdev, u8 status, u16 opcode)
+{
+	struct mgmt_cp_set_local_name *cp;
+	struct mgmt_pending_cmd *cmd;
+
+	bt_dev_dbg(hdev, "status 0x%02x", status);
+
+	hci_dev_lock(hdev);
+
+	cmd = pending_find(MGMT_OP_SET_LOCAL_NAME, hdev);
+	if (!cmd)
+		goto unlock;
+
+	cp = cmd->param;
+
+	if (status) {
+		mgmt_cmd_status(cmd->sk, hdev->id, MGMT_OP_SET_LOCAL_NAME,
+			        mgmt_status(status));
+	} else {
+		mgmt_cmd_complete(cmd->sk, hdev->id, MGMT_OP_SET_LOCAL_NAME, 0,
+				  cp, sizeof(*cp));
+
+		if (hci_dev_test_flag(hdev, HCI_LE_ADV))
+			adv_expire(hdev, MGMT_ADV_FLAG_LOCAL_NAME);
+	}
+
+	mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int set_local_name(struct sock *sk, struct hci_dev *hdev, void *data,
+			  u16 len)
+{
+	struct mgmt_cp_set_local_name *cp = data;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_request req;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	hci_dev_lock(hdev);
+
+	/* If the old values are the same as the new ones just return a
+	 * direct command complete event.
+	 */
+	if (!memcmp(hdev->dev_name, cp->name, sizeof(hdev->dev_name)) &&
+	    !memcmp(hdev->short_name, cp->short_name,
+		    sizeof(hdev->short_name))) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_LOCAL_NAME, 0,
+					data, len);
+		goto failed;
+	}
+
+	memcpy(hdev->short_name, cp->short_name, sizeof(hdev->short_name));
+
+	if (!hdev_is_powered(hdev)) {
+		memcpy(hdev->dev_name, cp->name, sizeof(hdev->dev_name));
+
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_LOCAL_NAME, 0,
+					data, len);
+		if (err < 0)
+			goto failed;
+
+		err = mgmt_limited_event(MGMT_EV_LOCAL_NAME_CHANGED, hdev, data,
+					 len, HCI_MGMT_LOCAL_NAME_EVENTS, sk);
+		ext_info_changed(hdev, sk);
+
+		goto failed;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_SET_LOCAL_NAME, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	memcpy(hdev->dev_name, cp->name, sizeof(hdev->dev_name));
+
+	hci_req_init(&req, hdev);
+
+	if (lmp_bredr_capable(hdev)) {
+		__hci_req_update_name(&req);
+		__hci_req_update_eir(&req);
+	}
+
+	/* The name is stored in the scan response data and so
+	 * no need to udpate the advertising data here.
+	 */
+	if (lmp_le_capable(hdev) && hci_dev_test_flag(hdev, HCI_ADVERTISING))
+		__hci_req_update_scan_rsp_data(&req, hdev->cur_adv_instance);
+
+	err = hci_req_run(&req, set_name_complete);
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+failed:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int set_appearance(struct sock *sk, struct hci_dev *hdev, void *data,
+			  u16 len)
+{
+	struct mgmt_cp_set_appearance *cp = data;
+	u16 appearance;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!lmp_le_capable(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_APPEARANCE,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	appearance = le16_to_cpu(cp->appearance);
+
+	hci_dev_lock(hdev);
+
+	if (hdev->appearance != appearance) {
+		hdev->appearance = appearance;
+
+		if (hci_dev_test_flag(hdev, HCI_LE_ADV))
+			adv_expire(hdev, MGMT_ADV_FLAG_APPEARANCE);
+
+		ext_info_changed(hdev, sk);
+	}
+
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_APPEARANCE, 0, NULL,
+				0);
+
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
+static int get_phy_configuration(struct sock *sk, struct hci_dev *hdev,
+				 void *data, u16 len)
+{
+	struct mgmt_rp_get_phy_confguration rp;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	hci_dev_lock(hdev);
+
+	memset(&rp, 0, sizeof(rp));
+
+	rp.supported_phys = cpu_to_le32(get_supported_phys(hdev));
+	rp.selected_phys = cpu_to_le32(get_selected_phys(hdev));
+	rp.configurable_phys = cpu_to_le32(get_configurable_phys(hdev));
+
+	hci_dev_unlock(hdev);
+
+	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_PHY_CONFIGURATION, 0,
+				 &rp, sizeof(rp));
+}
+
+int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip)
+{
+	struct mgmt_ev_phy_configuration_changed ev;
+
+	memset(&ev, 0, sizeof(ev));
+
+	ev.selected_phys = cpu_to_le32(get_selected_phys(hdev));
+
+	return mgmt_event(MGMT_EV_PHY_CONFIGURATION_CHANGED, hdev, &ev,
+			  sizeof(ev), skip);
+}
+
+static void set_default_phy_complete(struct hci_dev *hdev, u8 status,
+				     u16 opcode, struct sk_buff *skb)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	bt_dev_dbg(hdev, "status 0x%02x", status);
+
+	hci_dev_lock(hdev);
+
+	cmd = pending_find(MGMT_OP_SET_PHY_CONFIGURATION, hdev);
+	if (!cmd)
+		goto unlock;
+
+	if (status) {
+		mgmt_cmd_status(cmd->sk, hdev->id,
+				MGMT_OP_SET_PHY_CONFIGURATION,
+				mgmt_status(status));
+	} else {
+		mgmt_cmd_complete(cmd->sk, hdev->id,
+				  MGMT_OP_SET_PHY_CONFIGURATION, 0,
+				  NULL, 0);
+
+		mgmt_phy_configuration_changed(hdev, cmd->sk);
+	}
+
+	mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int set_phy_configuration(struct sock *sk, struct hci_dev *hdev,
+				 void *data, u16 len)
+{
+	struct mgmt_cp_set_phy_confguration *cp = data;
+	struct hci_cp_le_set_default_phy cp_phy;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_request req;
+	u32 selected_phys, configurable_phys, supported_phys, unconfigure_phys;
+	u16 pkt_type = (HCI_DH1 | HCI_DM1);
+	bool changed = false;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	configurable_phys = get_configurable_phys(hdev);
+	supported_phys = get_supported_phys(hdev);
+	selected_phys = __le32_to_cpu(cp->selected_phys);
+
+	if (selected_phys & ~supported_phys)
+		return mgmt_cmd_status(sk, hdev->id,
+				       MGMT_OP_SET_PHY_CONFIGURATION,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	unconfigure_phys = supported_phys & ~configurable_phys;
+
+	if ((selected_phys & unconfigure_phys) != unconfigure_phys)
+		return mgmt_cmd_status(sk, hdev->id,
+				       MGMT_OP_SET_PHY_CONFIGURATION,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	if (selected_phys == get_selected_phys(hdev))
+		return mgmt_cmd_complete(sk, hdev->id,
+					 MGMT_OP_SET_PHY_CONFIGURATION,
+					 0, NULL, 0);
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id,
+				      MGMT_OP_SET_PHY_CONFIGURATION,
+				      MGMT_STATUS_REJECTED);
+		goto unlock;
+	}
+
+	if (pending_find(MGMT_OP_SET_PHY_CONFIGURATION, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id,
+				      MGMT_OP_SET_PHY_CONFIGURATION,
+				      MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	if (selected_phys & MGMT_PHY_BR_1M_3SLOT)
+		pkt_type |= (HCI_DH3 | HCI_DM3);
+	else
+		pkt_type &= ~(HCI_DH3 | HCI_DM3);
+
+	if (selected_phys & MGMT_PHY_BR_1M_5SLOT)
+		pkt_type |= (HCI_DH5 | HCI_DM5);
+	else
+		pkt_type &= ~(HCI_DH5 | HCI_DM5);
+
+	if (selected_phys & MGMT_PHY_EDR_2M_1SLOT)
+		pkt_type &= ~HCI_2DH1;
+	else
+		pkt_type |= HCI_2DH1;
+
+	if (selected_phys & MGMT_PHY_EDR_2M_3SLOT)
+		pkt_type &= ~HCI_2DH3;
+	else
+		pkt_type |= HCI_2DH3;
+
+	if (selected_phys & MGMT_PHY_EDR_2M_5SLOT)
+		pkt_type &= ~HCI_2DH5;
+	else
+		pkt_type |= HCI_2DH5;
+
+	if (selected_phys & MGMT_PHY_EDR_3M_1SLOT)
+		pkt_type &= ~HCI_3DH1;
+	else
+		pkt_type |= HCI_3DH1;
+
+	if (selected_phys & MGMT_PHY_EDR_3M_3SLOT)
+		pkt_type &= ~HCI_3DH3;
+	else
+		pkt_type |= HCI_3DH3;
+
+	if (selected_phys & MGMT_PHY_EDR_3M_5SLOT)
+		pkt_type &= ~HCI_3DH5;
+	else
+		pkt_type |= HCI_3DH5;
+
+	if (pkt_type != hdev->pkt_type) {
+		hdev->pkt_type = pkt_type;
+		changed = true;
+	}
+
+	if ((selected_phys & MGMT_PHY_LE_MASK) ==
+	    (get_selected_phys(hdev) & MGMT_PHY_LE_MASK)) {
+		if (changed)
+			mgmt_phy_configuration_changed(hdev, sk);
+
+		err = mgmt_cmd_complete(sk, hdev->id,
+					MGMT_OP_SET_PHY_CONFIGURATION,
+					0, NULL, 0);
+
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_SET_PHY_CONFIGURATION, hdev, data,
+			       len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	hci_req_init(&req, hdev);
+
+	memset(&cp_phy, 0, sizeof(cp_phy));
+
+	if (!(selected_phys & MGMT_PHY_LE_TX_MASK))
+		cp_phy.all_phys |= 0x01;
+
+	if (!(selected_phys & MGMT_PHY_LE_RX_MASK))
+		cp_phy.all_phys |= 0x02;
+
+	if (selected_phys & MGMT_PHY_LE_1M_TX)
+		cp_phy.tx_phys |= HCI_LE_SET_PHY_1M;
+
+	if (selected_phys & MGMT_PHY_LE_2M_TX)
+		cp_phy.tx_phys |= HCI_LE_SET_PHY_2M;
+
+	if (selected_phys & MGMT_PHY_LE_CODED_TX)
+		cp_phy.tx_phys |= HCI_LE_SET_PHY_CODED;
+
+	if (selected_phys & MGMT_PHY_LE_1M_RX)
+		cp_phy.rx_phys |= HCI_LE_SET_PHY_1M;
+
+	if (selected_phys & MGMT_PHY_LE_2M_RX)
+		cp_phy.rx_phys |= HCI_LE_SET_PHY_2M;
+
+	if (selected_phys & MGMT_PHY_LE_CODED_RX)
+		cp_phy.rx_phys |= HCI_LE_SET_PHY_CODED;
+
+	hci_req_add(&req, HCI_OP_LE_SET_DEFAULT_PHY, sizeof(cp_phy), &cp_phy);
+
+	err = hci_req_run_skb(&req, set_default_phy_complete);
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
+static int set_blocked_keys(struct sock *sk, struct hci_dev *hdev, void *data,
+			    u16 len)
+{
+	int err = MGMT_STATUS_SUCCESS;
+	struct mgmt_cp_set_blocked_keys *keys = data;
+	const u16 max_key_count = ((U16_MAX - sizeof(*keys)) /
+				   sizeof(struct mgmt_blocked_key_info));
+	u16 key_count, expected_len;
+	int i;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	key_count = __le16_to_cpu(keys->key_count);
+	if (key_count > max_key_count) {
+		bt_dev_err(hdev, "too big key_count value %u", key_count);
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BLOCKED_KEYS,
+				       MGMT_STATUS_INVALID_PARAMS);
+	}
+
+	expected_len = struct_size(keys, keys, key_count);
+	if (expected_len != len) {
+		bt_dev_err(hdev, "expected %u bytes, got %u bytes",
+			   expected_len, len);
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BLOCKED_KEYS,
+				       MGMT_STATUS_INVALID_PARAMS);
+	}
+
+	hci_dev_lock(hdev);
+
+	hci_blocked_keys_clear(hdev);
+
+	for (i = 0; i < keys->key_count; ++i) {
+		struct blocked_key *b = kzalloc(sizeof(*b), GFP_KERNEL);
+
+		if (!b) {
+			err = MGMT_STATUS_NO_RESOURCES;
+			break;
+		}
+
+		b->type = keys->keys[i].type;
+		memcpy(b->val, keys->keys[i].val, sizeof(b->val));
+		list_add_rcu(&b->list, &hdev->blocked_keys);
+	}
+	hci_dev_unlock(hdev);
+
+	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_BLOCKED_KEYS,
+				err, NULL, 0);
+}
+
+static int set_wideband_speech(struct sock *sk, struct hci_dev *hdev,
+			       void *data, u16 len)
+{
+	struct mgmt_mode *cp = data;
+	int err;
+	bool changed = false;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!test_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks))
+		return mgmt_cmd_status(sk, hdev->id,
+				       MGMT_OP_SET_WIDEBAND_SPEECH,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	if (cp->val != 0x00 && cp->val != 0x01)
+		return mgmt_cmd_status(sk, hdev->id,
+				       MGMT_OP_SET_WIDEBAND_SPEECH,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	if (pending_find(MGMT_OP_SET_WIDEBAND_SPEECH, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id,
+				      MGMT_OP_SET_WIDEBAND_SPEECH,
+				      MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	if (hdev_is_powered(hdev) &&
+	    !!cp->val != hci_dev_test_flag(hdev,
+					   HCI_WIDEBAND_SPEECH_ENABLED)) {
+		err = mgmt_cmd_status(sk, hdev->id,
+				      MGMT_OP_SET_WIDEBAND_SPEECH,
+				      MGMT_STATUS_REJECTED);
+		goto unlock;
+	}
+
+	if (cp->val)
+		changed = !hci_dev_test_and_set_flag(hdev,
+						   HCI_WIDEBAND_SPEECH_ENABLED);
+	else
+		changed = hci_dev_test_and_clear_flag(hdev,
+						   HCI_WIDEBAND_SPEECH_ENABLED);
+
+	err = send_settings_rsp(sk, MGMT_OP_SET_WIDEBAND_SPEECH, hdev);
+	if (err < 0)
+		goto unlock;
+
+	if (changed)
+		err = new_settings(hdev, sk);
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int read_security_info(struct sock *sk, struct hci_dev *hdev,
+			      void *data, u16 data_len)
+{
+	char buf[16];
+	struct mgmt_rp_read_security_info *rp = (void *)buf;
+	u16 sec_len = 0;
+	u8 flags = 0;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	memset(&buf, 0, sizeof(buf));
+
+	hci_dev_lock(hdev);
+
+	/* When the Read Simple Pairing Options command is supported, then
+	 * the remote public key validation is supported.
+	 */
+	if (hdev->commands[41] & 0x08)
+		flags |= 0x01;	/* Remote public key validation (BR/EDR) */
+
+	flags |= 0x02;		/* Remote public key validation (LE) */
+
+	/* When the Read Encryption Key Size command is supported, then the
+	 * encryption key size is enforced.
+	 */
+	if (hdev->commands[20] & 0x10)
+		flags |= 0x04;	/* Encryption key size enforcement (BR/EDR) */
+
+	flags |= 0x08;		/* Encryption key size enforcement (LE) */
+
+	sec_len = eir_append_data(rp->sec, sec_len, 0x01, &flags, 1);
+
+	/* When the Read Simple Pairing Options command is supported, then
+	 * also max encryption key size information is provided.
+	 */
+	if (hdev->commands[41] & 0x08)
+		sec_len = eir_append_le16(rp->sec, sec_len, 0x02,
+					  hdev->max_enc_key_size);
+
+	sec_len = eir_append_le16(rp->sec, sec_len, 0x03, SMP_MAX_ENC_KEY_SIZE);
+
+	rp->sec_len = cpu_to_le16(sec_len);
+
+	hci_dev_unlock(hdev);
+
+	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_SECURITY_INFO, 0,
+				 rp, sizeof(*rp) + sec_len);
+}
+
+#ifdef CONFIG_BT_FEATURE_DEBUG
+/* d4992530-b9ec-469f-ab01-6c481c47da1c */
+static const u8 debug_uuid[16] = {
+	0x1c, 0xda, 0x47, 0x1c, 0x48, 0x6c, 0x01, 0xab,
+	0x9f, 0x46, 0xec, 0xb9, 0x30, 0x25, 0x99, 0xd4,
+};
+#endif
+
+/* 671b10b5-42c0-4696-9227-eb28d1b049d6 */
+static const u8 simult_central_periph_uuid[16] = {
+	0xd6, 0x49, 0xb0, 0xd1, 0x28, 0xeb, 0x27, 0x92,
+	0x96, 0x46, 0xc0, 0x42, 0xb5, 0x10, 0x1b, 0x67,
+};
+
+/* 15c0a148-c273-11ea-b3de-0242ac130004 */
+static const u8 rpa_resolution_uuid[16] = {
+	0x04, 0x00, 0x13, 0xac, 0x42, 0x02, 0xde, 0xb3,
+	0xea, 0x11, 0x73, 0xc2, 0x48, 0xa1, 0xc0, 0x15,
+};
+
+static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev,
+				  void *data, u16 data_len)
+{
+	char buf[62];	/* Enough space for 3 features */
+	struct mgmt_rp_read_exp_features_info *rp = (void *)buf;
+	u16 idx = 0;
+	u32 flags;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	memset(&buf, 0, sizeof(buf));
+
+#ifdef CONFIG_BT_FEATURE_DEBUG
+	if (!hdev) {
+		flags = bt_dbg_get() ? BIT(0) : 0;
+
+		memcpy(rp->features[idx].uuid, debug_uuid, 16);
+		rp->features[idx].flags = cpu_to_le32(flags);
+		idx++;
+	}
+#endif
+
+	if (hdev) {
+		if (test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) &&
+		    (hdev->le_states[4] & 0x08) &&	/* Central */
+		    (hdev->le_states[4] & 0x40) &&	/* Peripheral */
+		    (hdev->le_states[3] & 0x10))	/* Simultaneous */
+			flags = BIT(0);
+		else
+			flags = 0;
+
+		memcpy(rp->features[idx].uuid, simult_central_periph_uuid, 16);
+		rp->features[idx].flags = cpu_to_le32(flags);
+		idx++;
+	}
+
+	if (hdev && use_ll_privacy(hdev)) {
+		if (hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
+			flags = BIT(0) | BIT(1);
+		else
+			flags = BIT(1);
+
+		memcpy(rp->features[idx].uuid, rpa_resolution_uuid, 16);
+		rp->features[idx].flags = cpu_to_le32(flags);
+		idx++;
+	}
+
+	rp->feature_count = cpu_to_le16(idx);
+
+	/* After reading the experimental features information, enable
+	 * the events to update client on any future change.
+	 */
+	hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS);
+
+	return mgmt_cmd_complete(sk, hdev ? hdev->id : MGMT_INDEX_NONE,
+				 MGMT_OP_READ_EXP_FEATURES_INFO,
+				 0, rp, sizeof(*rp) + (20 * idx));
+}
+
+static int exp_ll_privacy_feature_changed(bool enabled, struct hci_dev *hdev,
+					  struct sock *skip)
+{
+	struct mgmt_ev_exp_feature_changed ev;
+
+	memset(&ev, 0, sizeof(ev));
+	memcpy(ev.uuid, rpa_resolution_uuid, 16);
+	ev.flags = cpu_to_le32((enabled ? BIT(0) : 0) | BIT(1));
+
+	return mgmt_limited_event(MGMT_EV_EXP_FEATURE_CHANGED, hdev,
+				  &ev, sizeof(ev),
+				  HCI_MGMT_EXP_FEATURE_EVENTS, skip);
+
+}
+
+#ifdef CONFIG_BT_FEATURE_DEBUG
+static int exp_debug_feature_changed(bool enabled, struct sock *skip)
+{
+	struct mgmt_ev_exp_feature_changed ev;
+
+	memset(&ev, 0, sizeof(ev));
+	memcpy(ev.uuid, debug_uuid, 16);
+	ev.flags = cpu_to_le32(enabled ? BIT(0) : 0);
+
+	return mgmt_limited_event(MGMT_EV_EXP_FEATURE_CHANGED, NULL,
+				  &ev, sizeof(ev),
+				  HCI_MGMT_EXP_FEATURE_EVENTS, skip);
+}
+#endif
+
+static int set_exp_feature(struct sock *sk, struct hci_dev *hdev,
+			   void *data, u16 data_len)
+{
+	struct mgmt_cp_set_exp_feature *cp = data;
+	struct mgmt_rp_set_exp_feature rp;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!memcmp(cp->uuid, ZERO_KEY, 16)) {
+		memset(rp.uuid, 0, 16);
+		rp.flags = cpu_to_le32(0);
+
+#ifdef CONFIG_BT_FEATURE_DEBUG
+		if (!hdev) {
+			bool changed = bt_dbg_get();
+
+			bt_dbg_set(false);
+
+			if (changed)
+				exp_debug_feature_changed(false, sk);
+		}
+#endif
+
+		if (hdev && use_ll_privacy(hdev) && !hdev_is_powered(hdev)) {
+			bool changed = hci_dev_test_flag(hdev,
+							 HCI_ENABLE_LL_PRIVACY);
+
+			hci_dev_clear_flag(hdev, HCI_ENABLE_LL_PRIVACY);
+
+			if (changed)
+				exp_ll_privacy_feature_changed(false, hdev, sk);
+		}
+
+		hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS);
+
+		return mgmt_cmd_complete(sk, hdev ? hdev->id : MGMT_INDEX_NONE,
+					 MGMT_OP_SET_EXP_FEATURE, 0,
+					 &rp, sizeof(rp));
+	}
+
+#ifdef CONFIG_BT_FEATURE_DEBUG
+	if (!memcmp(cp->uuid, debug_uuid, 16)) {
+		bool val, changed;
+		int err;
+
+		/* Command requires to use the non-controller index */
+		if (hdev)
+			return mgmt_cmd_status(sk, hdev->id,
+					       MGMT_OP_SET_EXP_FEATURE,
+					       MGMT_STATUS_INVALID_INDEX);
+
+		/* Parameters are limited to a single octet */
+		if (data_len != MGMT_SET_EXP_FEATURE_SIZE + 1)
+			return mgmt_cmd_status(sk, MGMT_INDEX_NONE,
+					       MGMT_OP_SET_EXP_FEATURE,
+					       MGMT_STATUS_INVALID_PARAMS);
+
+		/* Only boolean on/off is supported */
+		if (cp->param[0] != 0x00 && cp->param[0] != 0x01)
+			return mgmt_cmd_status(sk, MGMT_INDEX_NONE,
+					       MGMT_OP_SET_EXP_FEATURE,
+					       MGMT_STATUS_INVALID_PARAMS);
+
+		val = !!cp->param[0];
+		changed = val ? !bt_dbg_get() : bt_dbg_get();
+		bt_dbg_set(val);
+
+		memcpy(rp.uuid, debug_uuid, 16);
+		rp.flags = cpu_to_le32(val ? BIT(0) : 0);
+
+		hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS);
+
+		err = mgmt_cmd_complete(sk, MGMT_INDEX_NONE,
+					MGMT_OP_SET_EXP_FEATURE, 0,
+					&rp, sizeof(rp));
+
+		if (changed)
+			exp_debug_feature_changed(val, sk);
+
+		return err;
+	}
+#endif
+
+	if (!memcmp(cp->uuid, rpa_resolution_uuid, 16)) {
+		bool val, changed;
+		int err;
+		u32 flags;
+
+		/* Command requires to use the controller index */
+		if (!hdev)
+			return mgmt_cmd_status(sk, MGMT_INDEX_NONE,
+					       MGMT_OP_SET_EXP_FEATURE,
+					       MGMT_STATUS_INVALID_INDEX);
+
+		/* Changes can only be made when controller is powered down */
+		if (hdev_is_powered(hdev))
+			return mgmt_cmd_status(sk, hdev->id,
+					       MGMT_OP_SET_EXP_FEATURE,
+					       MGMT_STATUS_NOT_POWERED);
+
+		/* Parameters are limited to a single octet */
+		if (data_len != MGMT_SET_EXP_FEATURE_SIZE + 1)
+			return mgmt_cmd_status(sk, hdev->id,
+					       MGMT_OP_SET_EXP_FEATURE,
+					       MGMT_STATUS_INVALID_PARAMS);
+
+		/* Only boolean on/off is supported */
+		if (cp->param[0] != 0x00 && cp->param[0] != 0x01)
+			return mgmt_cmd_status(sk, hdev->id,
+					       MGMT_OP_SET_EXP_FEATURE,
+					       MGMT_STATUS_INVALID_PARAMS);
+
+		val = !!cp->param[0];
+
+		if (val) {
+			changed = !hci_dev_test_flag(hdev,
+						     HCI_ENABLE_LL_PRIVACY);
+			hci_dev_set_flag(hdev, HCI_ENABLE_LL_PRIVACY);
+			hci_dev_clear_flag(hdev, HCI_ADVERTISING);
+
+			/* Enable LL privacy + supported settings changed */
+			flags = BIT(0) | BIT(1);
+		} else {
+			changed = hci_dev_test_flag(hdev,
+						    HCI_ENABLE_LL_PRIVACY);
+			hci_dev_clear_flag(hdev, HCI_ENABLE_LL_PRIVACY);
+
+			/* Disable LL privacy + supported settings changed */
+			flags = BIT(1);
+		}
+
+		memcpy(rp.uuid, rpa_resolution_uuid, 16);
+		rp.flags = cpu_to_le32(flags);
+
+		hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS);
+
+		err = mgmt_cmd_complete(sk, hdev->id,
+					MGMT_OP_SET_EXP_FEATURE, 0,
+					&rp, sizeof(rp));
+
+		if (changed)
+			exp_ll_privacy_feature_changed(val, hdev, sk);
+
+		return err;
+	}
+
+	return mgmt_cmd_status(sk, hdev ? hdev->id : MGMT_INDEX_NONE,
+			       MGMT_OP_SET_EXP_FEATURE,
+			       MGMT_STATUS_NOT_SUPPORTED);
+}
+
+#define SUPPORTED_DEVICE_FLAGS() ((1U << HCI_CONN_FLAG_MAX) - 1)
+
+static int get_device_flags(struct sock *sk, struct hci_dev *hdev, void *data,
+			    u16 data_len)
+{
+	struct mgmt_cp_get_device_flags *cp = data;
+	struct mgmt_rp_get_device_flags rp;
+	struct bdaddr_list_with_flags *br_params;
+	struct hci_conn_params *params;
+	u32 supported_flags = SUPPORTED_DEVICE_FLAGS();
+	u32 current_flags = 0;
+	u8 status = MGMT_STATUS_INVALID_PARAMS;
+
+	bt_dev_dbg(hdev, "Get device flags %pMR (type 0x%x)\n",
+		   &cp->addr.bdaddr, cp->addr.type);
+
+	hci_dev_lock(hdev);
+
+	memset(&rp, 0, sizeof(rp));
+
+	if (cp->addr.type == BDADDR_BREDR) {
+		br_params = hci_bdaddr_list_lookup_with_flags(&hdev->accept_list,
+							      &cp->addr.bdaddr,
+							      cp->addr.type);
+		if (!br_params)
+			goto done;
+
+		current_flags = br_params->current_flags;
+	} else {
+		params = hci_conn_params_lookup(hdev, &cp->addr.bdaddr,
+						le_addr_type(cp->addr.type));
+
+		if (!params)
+			goto done;
+
+		current_flags = params->current_flags;
+	}
+
+	bacpy(&rp.addr.bdaddr, &cp->addr.bdaddr);
+	rp.addr.type = cp->addr.type;
+	rp.supported_flags = cpu_to_le32(supported_flags);
+	rp.current_flags = cpu_to_le32(current_flags);
+
+	status = MGMT_STATUS_SUCCESS;
+
+done:
+	hci_dev_unlock(hdev);
+
+	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_DEVICE_FLAGS, status,
+				&rp, sizeof(rp));
+}
+
+static void device_flags_changed(struct sock *sk, struct hci_dev *hdev,
+				 bdaddr_t *bdaddr, u8 bdaddr_type,
+				 u32 supported_flags, u32 current_flags)
+{
+	struct mgmt_ev_device_flags_changed ev;
+
+	bacpy(&ev.addr.bdaddr, bdaddr);
+	ev.addr.type = bdaddr_type;
+	ev.supported_flags = cpu_to_le32(supported_flags);
+	ev.current_flags = cpu_to_le32(current_flags);
+
+	mgmt_event(MGMT_EV_DEVICE_FLAGS_CHANGED, hdev, &ev, sizeof(ev), sk);
+}
+
+static int set_device_flags(struct sock *sk, struct hci_dev *hdev, void *data,
+			    u16 len)
+{
+	struct mgmt_cp_set_device_flags *cp = data;
+	struct bdaddr_list_with_flags *br_params;
+	struct hci_conn_params *params;
+	u8 status = MGMT_STATUS_INVALID_PARAMS;
+	u32 supported_flags = SUPPORTED_DEVICE_FLAGS();
+	u32 current_flags = __le32_to_cpu(cp->current_flags);
+
+	bt_dev_dbg(hdev, "Set device flags %pMR (type 0x%x) = 0x%x",
+		   &cp->addr.bdaddr, cp->addr.type,
+		   __le32_to_cpu(current_flags));
+
+	if ((supported_flags | current_flags) != supported_flags) {
+		bt_dev_warn(hdev, "Bad flag given (0x%x) vs supported (0x%0x)",
+			    current_flags, supported_flags);
+		goto done;
+	}
+
+	hci_dev_lock(hdev);
+
+	if (cp->addr.type == BDADDR_BREDR) {
+		br_params = hci_bdaddr_list_lookup_with_flags(&hdev->accept_list,
+							      &cp->addr.bdaddr,
+							      cp->addr.type);
+
+		if (br_params) {
+			br_params->current_flags = current_flags;
+			status = MGMT_STATUS_SUCCESS;
+		} else {
+			bt_dev_warn(hdev, "No such BR/EDR device %pMR (0x%x)",
+				    &cp->addr.bdaddr, cp->addr.type);
+		}
+	} else {
+		params = hci_conn_params_lookup(hdev, &cp->addr.bdaddr,
+						le_addr_type(cp->addr.type));
+		if (params) {
+			params->current_flags = current_flags;
+			status = MGMT_STATUS_SUCCESS;
+		} else {
+			bt_dev_warn(hdev, "No such LE device %pMR (0x%x)",
+				    &cp->addr.bdaddr,
+				    le_addr_type(cp->addr.type));
+		}
+	}
+
+done:
+	hci_dev_unlock(hdev);
+
+	if (status == MGMT_STATUS_SUCCESS)
+		device_flags_changed(sk, hdev, &cp->addr.bdaddr, cp->addr.type,
+				     supported_flags, current_flags);
+
+	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_DEVICE_FLAGS, status,
+				 &cp->addr, sizeof(cp->addr));
+}
+
+static void mgmt_adv_monitor_added(struct sock *sk, struct hci_dev *hdev,
+				   u16 handle)
+{
+	struct mgmt_ev_adv_monitor_added ev;
+
+	ev.monitor_handle = cpu_to_le16(handle);
+
+	mgmt_event(MGMT_EV_ADV_MONITOR_ADDED, hdev, &ev, sizeof(ev), sk);
+}
+
+static void mgmt_adv_monitor_removed(struct sock *sk, struct hci_dev *hdev,
+				     u16 handle)
+{
+	struct mgmt_ev_adv_monitor_added ev;
+
+	ev.monitor_handle = cpu_to_le16(handle);
+
+	mgmt_event(MGMT_EV_ADV_MONITOR_REMOVED, hdev, &ev, sizeof(ev), sk);
+}
+
+static int read_adv_mon_features(struct sock *sk, struct hci_dev *hdev,
+				 void *data, u16 len)
+{
+	struct adv_monitor *monitor = NULL;
+	struct mgmt_rp_read_adv_monitor_features *rp = NULL;
+	int handle, err;
+	size_t rp_size = 0;
+	__u32 supported = 0;
+	__u16 num_handles = 0;
+	__u16 handles[HCI_MAX_ADV_MONITOR_NUM_HANDLES];
+
+	BT_DBG("request for %s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	if (msft_get_features(hdev) & MSFT_FEATURE_MASK_LE_ADV_MONITOR)
+		supported |= MGMT_ADV_MONITOR_FEATURE_MASK_OR_PATTERNS;
+
+	idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle) {
+		handles[num_handles++] = monitor->handle;
+	}
+
+	hci_dev_unlock(hdev);
+
+	rp_size = sizeof(*rp) + (num_handles * sizeof(u16));
+	rp = kmalloc(rp_size, GFP_KERNEL);
+	if (!rp)
+		return -ENOMEM;
+
+	/* Once controller-based monitoring is in place, the enabled_features
+	 * should reflect the use.
+	 */
+	rp->supported_features = cpu_to_le32(supported);
+	rp->enabled_features = 0;
+	rp->max_num_handles = cpu_to_le16(HCI_MAX_ADV_MONITOR_NUM_HANDLES);
+	rp->max_num_patterns = HCI_MAX_ADV_MONITOR_NUM_PATTERNS;
+	rp->num_handles = cpu_to_le16(num_handles);
+	if (num_handles)
+		memcpy(&rp->handles, &handles, (num_handles * sizeof(u16)));
+
+	err = mgmt_cmd_complete(sk, hdev->id,
+				MGMT_OP_READ_ADV_MONITOR_FEATURES,
+				MGMT_STATUS_SUCCESS, rp, rp_size);
+
+	kfree(rp);
+
+	return err;
+}
+
+static int add_adv_patterns_monitor(struct sock *sk, struct hci_dev *hdev,
+				    void *data, u16 len)
+{
+	struct mgmt_cp_add_adv_patterns_monitor *cp = data;
+	struct mgmt_rp_add_adv_patterns_monitor rp;
+	struct adv_monitor *m = NULL;
+	struct adv_pattern *p = NULL;
+	unsigned int mp_cnt = 0, prev_adv_monitors_cnt;
+	__u8 cp_ofst = 0, cp_len = 0;
+	int err, i;
+
+	BT_DBG("request for %s", hdev->name);
+
+	if (len <= sizeof(*cp) || cp->pattern_count == 0) {
+		err = mgmt_cmd_status(sk, hdev->id,
+				      MGMT_OP_ADD_ADV_PATTERNS_MONITOR,
+				      MGMT_STATUS_INVALID_PARAMS);
+		goto failed;
+	}
+
+	m = kmalloc(sizeof(*m), GFP_KERNEL);
+	if (!m) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	INIT_LIST_HEAD(&m->patterns);
+	m->active = false;
+
+	for (i = 0; i < cp->pattern_count; i++) {
+		if (++mp_cnt > HCI_MAX_ADV_MONITOR_NUM_PATTERNS) {
+			err = mgmt_cmd_status(sk, hdev->id,
+					      MGMT_OP_ADD_ADV_PATTERNS_MONITOR,
+					      MGMT_STATUS_INVALID_PARAMS);
+			goto failed;
+		}
+
+		cp_ofst = cp->patterns[i].offset;
+		cp_len = cp->patterns[i].length;
+		if (cp_ofst >= HCI_MAX_AD_LENGTH ||
+		    cp_len > HCI_MAX_AD_LENGTH ||
+		    (cp_ofst + cp_len) > HCI_MAX_AD_LENGTH) {
+			err = mgmt_cmd_status(sk, hdev->id,
+					      MGMT_OP_ADD_ADV_PATTERNS_MONITOR,
+					      MGMT_STATUS_INVALID_PARAMS);
+			goto failed;
+		}
+
+		p = kmalloc(sizeof(*p), GFP_KERNEL);
+		if (!p) {
+			err = -ENOMEM;
+			goto failed;
+		}
+
+		p->ad_type = cp->patterns[i].ad_type;
+		p->offset = cp->patterns[i].offset;
+		p->length = cp->patterns[i].length;
+		memcpy(p->value, cp->patterns[i].value, p->length);
+
+		INIT_LIST_HEAD(&p->list);
+		list_add(&p->list, &m->patterns);
+	}
+
+	if (mp_cnt != cp->pattern_count) {
+		err = mgmt_cmd_status(sk, hdev->id,
+				      MGMT_OP_ADD_ADV_PATTERNS_MONITOR,
+				      MGMT_STATUS_INVALID_PARAMS);
+		goto failed;
+	}
+
+	hci_dev_lock(hdev);
+
+	prev_adv_monitors_cnt = hdev->adv_monitors_cnt;
+
+	err = hci_add_adv_monitor(hdev, m);
+	if (err) {
+		if (err == -ENOSPC) {
+			mgmt_cmd_status(sk, hdev->id,
+					MGMT_OP_ADD_ADV_PATTERNS_MONITOR,
+					MGMT_STATUS_NO_RESOURCES);
+		}
+		goto unlock;
+	}
+
+	if (hdev->adv_monitors_cnt > prev_adv_monitors_cnt)
+		mgmt_adv_monitor_added(sk, hdev, m->handle);
+
+	hci_dev_unlock(hdev);
+
+	rp.monitor_handle = cpu_to_le16(m->handle);
+
+	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_ADD_ADV_PATTERNS_MONITOR,
+				 MGMT_STATUS_SUCCESS, &rp, sizeof(rp));
+
+unlock:
+	hci_dev_unlock(hdev);
+
+failed:
+	hci_free_adv_monitor(m);
+	return err;
+}
+
+static int remove_adv_monitor(struct sock *sk, struct hci_dev *hdev,
+			      void *data, u16 len)
+{
+	struct mgmt_cp_remove_adv_monitor *cp = data;
+	struct mgmt_rp_remove_adv_monitor rp;
+	unsigned int prev_adv_monitors_cnt;
+	u16 handle;
+	int err;
+
+	BT_DBG("request for %s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	handle = __le16_to_cpu(cp->monitor_handle);
+	prev_adv_monitors_cnt = hdev->adv_monitors_cnt;
+
+	err = hci_remove_adv_monitor(hdev, handle);
+	if (err == -ENOENT) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_REMOVE_ADV_MONITOR,
+				      MGMT_STATUS_INVALID_INDEX);
+		goto unlock;
+	}
+
+	if (hdev->adv_monitors_cnt < prev_adv_monitors_cnt)
+		mgmt_adv_monitor_removed(sk, hdev, handle);
+
+	hci_dev_unlock(hdev);
+
+	rp.monitor_handle = cp->monitor_handle;
+
+	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_REMOVE_ADV_MONITOR,
+				 MGMT_STATUS_SUCCESS, &rp, sizeof(rp));
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static void read_local_oob_data_complete(struct hci_dev *hdev, u8 status,
+				         u16 opcode, struct sk_buff *skb)
+{
+	struct mgmt_rp_read_local_oob_data mgmt_rp;
+	size_t rp_size = sizeof(mgmt_rp);
+	struct mgmt_pending_cmd *cmd;
+
+	bt_dev_dbg(hdev, "status %u", status);
+
+	cmd = pending_find(MGMT_OP_READ_LOCAL_OOB_DATA, hdev);
+	if (!cmd)
+		return;
+
+	if (status || !skb) {
+		mgmt_cmd_status(cmd->sk, hdev->id, MGMT_OP_READ_LOCAL_OOB_DATA,
+				status ? mgmt_status(status) : MGMT_STATUS_FAILED);
+		goto remove;
+	}
+
+	memset(&mgmt_rp, 0, sizeof(mgmt_rp));
+
+	if (opcode == HCI_OP_READ_LOCAL_OOB_DATA) {
+		struct hci_rp_read_local_oob_data *rp = (void *) skb->data;
+
+		if (skb->len < sizeof(*rp)) {
+			mgmt_cmd_status(cmd->sk, hdev->id,
+					MGMT_OP_READ_LOCAL_OOB_DATA,
+					MGMT_STATUS_FAILED);
+			goto remove;
+		}
+
+		memcpy(mgmt_rp.hash192, rp->hash, sizeof(rp->hash));
+		memcpy(mgmt_rp.rand192, rp->rand, sizeof(rp->rand));
+
+		rp_size -= sizeof(mgmt_rp.hash256) + sizeof(mgmt_rp.rand256);
+	} else {
+		struct hci_rp_read_local_oob_ext_data *rp = (void *) skb->data;
+
+		if (skb->len < sizeof(*rp)) {
+			mgmt_cmd_status(cmd->sk, hdev->id,
+					MGMT_OP_READ_LOCAL_OOB_DATA,
+					MGMT_STATUS_FAILED);
+			goto remove;
+		}
+
+		memcpy(mgmt_rp.hash192, rp->hash192, sizeof(rp->hash192));
+		memcpy(mgmt_rp.rand192, rp->rand192, sizeof(rp->rand192));
+
+		memcpy(mgmt_rp.hash256, rp->hash256, sizeof(rp->hash256));
+		memcpy(mgmt_rp.rand256, rp->rand256, sizeof(rp->rand256));
+	}
+
+	mgmt_cmd_complete(cmd->sk, hdev->id, MGMT_OP_READ_LOCAL_OOB_DATA,
+			  MGMT_STATUS_SUCCESS, &mgmt_rp, rp_size);
+
+remove:
+	mgmt_pending_remove(cmd);
+}
+
+static int read_local_oob_data(struct sock *sk, struct hci_dev *hdev,
+			       void *data, u16 data_len)
+{
+	struct mgmt_pending_cmd *cmd;
+	struct hci_request req;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_READ_LOCAL_OOB_DATA,
+				      MGMT_STATUS_NOT_POWERED);
+		goto unlock;
+	}
+
+	if (!lmp_ssp_capable(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_READ_LOCAL_OOB_DATA,
+				      MGMT_STATUS_NOT_SUPPORTED);
+		goto unlock;
+	}
+
+	if (pending_find(MGMT_OP_READ_LOCAL_OOB_DATA, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_READ_LOCAL_OOB_DATA,
+				      MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_READ_LOCAL_OOB_DATA, hdev, NULL, 0);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	hci_req_init(&req, hdev);
+
+	if (bredr_sc_enabled(hdev))
+		hci_req_add(&req, HCI_OP_READ_LOCAL_OOB_EXT_DATA, 0, NULL);
+	else
+		hci_req_add(&req, HCI_OP_READ_LOCAL_OOB_DATA, 0, NULL);
+
+	err = hci_req_run_skb(&req, read_local_oob_data_complete);
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int add_remote_oob_data(struct sock *sk, struct hci_dev *hdev,
+			       void *data, u16 len)
+{
+	struct mgmt_addr_info *addr = data;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!bdaddr_type_is_valid(addr->type))
+		return mgmt_cmd_complete(sk, hdev->id,
+					 MGMT_OP_ADD_REMOTE_OOB_DATA,
+					 MGMT_STATUS_INVALID_PARAMS,
+					 addr, sizeof(*addr));
+
+	hci_dev_lock(hdev);
+
+	if (len == MGMT_ADD_REMOTE_OOB_DATA_SIZE) {
+		struct mgmt_cp_add_remote_oob_data *cp = data;
+		u8 status;
+
+		if (cp->addr.type != BDADDR_BREDR) {
+			err = mgmt_cmd_complete(sk, hdev->id,
+						MGMT_OP_ADD_REMOTE_OOB_DATA,
+						MGMT_STATUS_INVALID_PARAMS,
+						&cp->addr, sizeof(cp->addr));
+			goto unlock;
+		}
+
+		err = hci_add_remote_oob_data(hdev, &cp->addr.bdaddr,
+					      cp->addr.type, cp->hash,
+					      cp->rand, NULL, NULL);
+		if (err < 0)
+			status = MGMT_STATUS_FAILED;
+		else
+			status = MGMT_STATUS_SUCCESS;
+
+		err = mgmt_cmd_complete(sk, hdev->id,
+					MGMT_OP_ADD_REMOTE_OOB_DATA, status,
+					&cp->addr, sizeof(cp->addr));
+	} else if (len == MGMT_ADD_REMOTE_OOB_EXT_DATA_SIZE) {
+		struct mgmt_cp_add_remote_oob_ext_data *cp = data;
+		u8 *rand192, *hash192, *rand256, *hash256;
+		u8 status;
+
+		if (bdaddr_type_is_le(cp->addr.type)) {
+			/* Enforce zero-valued 192-bit parameters as
+			 * long as legacy SMP OOB isn't implemented.
+			 */
+			if (memcmp(cp->rand192, ZERO_KEY, 16) ||
+			    memcmp(cp->hash192, ZERO_KEY, 16)) {
+				err = mgmt_cmd_complete(sk, hdev->id,
+							MGMT_OP_ADD_REMOTE_OOB_DATA,
+							MGMT_STATUS_INVALID_PARAMS,
+							addr, sizeof(*addr));
+				goto unlock;
+			}
+
+			rand192 = NULL;
+			hash192 = NULL;
+		} else {
+			/* In case one of the P-192 values is set to zero,
+			 * then just disable OOB data for P-192.
+			 */
+			if (!memcmp(cp->rand192, ZERO_KEY, 16) ||
+			    !memcmp(cp->hash192, ZERO_KEY, 16)) {
+				rand192 = NULL;
+				hash192 = NULL;
+			} else {
+				rand192 = cp->rand192;
+				hash192 = cp->hash192;
+			}
+		}
+
+		/* In case one of the P-256 values is set to zero, then just
+		 * disable OOB data for P-256.
+		 */
+		if (!memcmp(cp->rand256, ZERO_KEY, 16) ||
+		    !memcmp(cp->hash256, ZERO_KEY, 16)) {
+			rand256 = NULL;
+			hash256 = NULL;
+		} else {
+			rand256 = cp->rand256;
+			hash256 = cp->hash256;
+		}
+
+		err = hci_add_remote_oob_data(hdev, &cp->addr.bdaddr,
+					      cp->addr.type, hash192, rand192,
+					      hash256, rand256);
+		if (err < 0)
+			status = MGMT_STATUS_FAILED;
+		else
+			status = MGMT_STATUS_SUCCESS;
+
+		err = mgmt_cmd_complete(sk, hdev->id,
+					MGMT_OP_ADD_REMOTE_OOB_DATA,
+					status, &cp->addr, sizeof(cp->addr));
+	} else {
+		bt_dev_err(hdev, "add_remote_oob_data: invalid len of %u bytes",
+			   len);
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_REMOTE_OOB_DATA,
+				      MGMT_STATUS_INVALID_PARAMS);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int remove_remote_oob_data(struct sock *sk, struct hci_dev *hdev,
+				  void *data, u16 len)
+{
+	struct mgmt_cp_remove_remote_oob_data *cp = data;
+	u8 status;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (cp->addr.type != BDADDR_BREDR)
+		return mgmt_cmd_complete(sk, hdev->id,
+					 MGMT_OP_REMOVE_REMOTE_OOB_DATA,
+					 MGMT_STATUS_INVALID_PARAMS,
+					 &cp->addr, sizeof(cp->addr));
+
+	hci_dev_lock(hdev);
+
+	if (!bacmp(&cp->addr.bdaddr, BDADDR_ANY)) {
+		hci_remote_oob_data_clear(hdev);
+		status = MGMT_STATUS_SUCCESS;
+		goto done;
+	}
+
+	err = hci_remove_remote_oob_data(hdev, &cp->addr.bdaddr, cp->addr.type);
+	if (err < 0)
+		status = MGMT_STATUS_INVALID_PARAMS;
+	else
+		status = MGMT_STATUS_SUCCESS;
+
+done:
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_REMOVE_REMOTE_OOB_DATA,
+				status, &cp->addr, sizeof(cp->addr));
+
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	bt_dev_dbg(hdev, "status %d", status);
+
+	hci_dev_lock(hdev);
+
+	cmd = pending_find(MGMT_OP_START_DISCOVERY, hdev);
+	if (!cmd)
+		cmd = pending_find(MGMT_OP_START_SERVICE_DISCOVERY, hdev);
+
+	if (!cmd)
+		cmd = pending_find(MGMT_OP_START_LIMITED_DISCOVERY, hdev);
+
+	if (cmd) {
+		cmd->cmd_complete(cmd, mgmt_status(status));
+		mgmt_pending_remove(cmd);
+	}
+
+	hci_dev_unlock(hdev);
+
+	/* Handle suspend notifier */
+	if (test_and_clear_bit(SUSPEND_UNPAUSE_DISCOVERY,
+			       hdev->suspend_tasks)) {
+		bt_dev_dbg(hdev, "Unpaused discovery");
+		wake_up(&hdev->suspend_wait_q);
+	}
+}
+
+static bool discovery_type_is_valid(struct hci_dev *hdev, uint8_t type,
+				    uint8_t *mgmt_status)
+{
+	switch (type) {
+	case DISCOV_TYPE_LE:
+		*mgmt_status = mgmt_le_support(hdev);
+		if (*mgmt_status)
+			return false;
+		break;
+	case DISCOV_TYPE_INTERLEAVED:
+		*mgmt_status = mgmt_le_support(hdev);
+		if (*mgmt_status)
+			return false;
+		fallthrough;
+	case DISCOV_TYPE_BREDR:
+		*mgmt_status = mgmt_bredr_support(hdev);
+		if (*mgmt_status)
+			return false;
+		break;
+	default:
+		*mgmt_status = MGMT_STATUS_INVALID_PARAMS;
+		return false;
+	}
+
+	return true;
+}
+
+static int start_discovery_internal(struct sock *sk, struct hci_dev *hdev,
+				    u16 op, void *data, u16 len)
+{
+	struct mgmt_cp_start_discovery *cp = data;
+	struct mgmt_pending_cmd *cmd;
+	u8 status;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_complete(sk, hdev->id, op,
+					MGMT_STATUS_NOT_POWERED,
+					&cp->type, sizeof(cp->type));
+		goto failed;
+	}
+
+	if (hdev->discovery.state != DISCOVERY_STOPPED ||
+	    hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) {
+		err = mgmt_cmd_complete(sk, hdev->id, op, MGMT_STATUS_BUSY,
+					&cp->type, sizeof(cp->type));
+		goto failed;
+	}
+
+	if (!discovery_type_is_valid(hdev, cp->type, &status)) {
+		err = mgmt_cmd_complete(sk, hdev->id, op, status,
+					&cp->type, sizeof(cp->type));
+		goto failed;
+	}
+
+	/* Can't start discovery when it is paused */
+	if (hdev->discovery_paused) {
+		err = mgmt_cmd_complete(sk, hdev->id, op, MGMT_STATUS_BUSY,
+					&cp->type, sizeof(cp->type));
+		goto failed;
+	}
+
+	/* Clear the discovery filter first to free any previously
+	 * allocated memory for the UUID list.
+	 */
+	hci_discovery_filter_clear(hdev);
+
+	hdev->discovery.type = cp->type;
+	hdev->discovery.report_invalid_rssi = false;
+	if (op == MGMT_OP_START_LIMITED_DISCOVERY)
+		hdev->discovery.limited = true;
+	else
+		hdev->discovery.limited = false;
+
+	cmd = mgmt_pending_add(sk, op, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	cmd->cmd_complete = generic_cmd_complete;
+
+	hci_discovery_set_state(hdev, DISCOVERY_STARTING);
+	queue_work(hdev->req_workqueue, &hdev->discov_update);
+	err = 0;
+
+failed:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int start_discovery(struct sock *sk, struct hci_dev *hdev,
+			   void *data, u16 len)
+{
+	return start_discovery_internal(sk, hdev, MGMT_OP_START_DISCOVERY,
+					data, len);
+}
+
+static int start_limited_discovery(struct sock *sk, struct hci_dev *hdev,
+				   void *data, u16 len)
+{
+	return start_discovery_internal(sk, hdev,
+					MGMT_OP_START_LIMITED_DISCOVERY,
+					data, len);
+}
+
+static int service_discovery_cmd_complete(struct mgmt_pending_cmd *cmd,
+					  u8 status)
+{
+	return mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, status,
+				 cmd->param, 1);
+}
+
+static int start_service_discovery(struct sock *sk, struct hci_dev *hdev,
+				   void *data, u16 len)
+{
+	struct mgmt_cp_start_service_discovery *cp = data;
+	struct mgmt_pending_cmd *cmd;
+	const u16 max_uuid_count = ((U16_MAX - sizeof(*cp)) / 16);
+	u16 uuid_count, expected_len;
+	u8 status;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_complete(sk, hdev->id,
+					MGMT_OP_START_SERVICE_DISCOVERY,
+					MGMT_STATUS_NOT_POWERED,
+					&cp->type, sizeof(cp->type));
+		goto failed;
+	}
+
+	if (hdev->discovery.state != DISCOVERY_STOPPED ||
+	    hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) {
+		err = mgmt_cmd_complete(sk, hdev->id,
+					MGMT_OP_START_SERVICE_DISCOVERY,
+					MGMT_STATUS_BUSY, &cp->type,
+					sizeof(cp->type));
+		goto failed;
+	}
+
+	uuid_count = __le16_to_cpu(cp->uuid_count);
+	if (uuid_count > max_uuid_count) {
+		bt_dev_err(hdev, "service_discovery: too big uuid_count value %u",
+			   uuid_count);
+		err = mgmt_cmd_complete(sk, hdev->id,
+					MGMT_OP_START_SERVICE_DISCOVERY,
+					MGMT_STATUS_INVALID_PARAMS, &cp->type,
+					sizeof(cp->type));
+		goto failed;
+	}
+
+	expected_len = sizeof(*cp) + uuid_count * 16;
+	if (expected_len != len) {
+		bt_dev_err(hdev, "service_discovery: expected %u bytes, got %u bytes",
+			   expected_len, len);
+		err = mgmt_cmd_complete(sk, hdev->id,
+					MGMT_OP_START_SERVICE_DISCOVERY,
+					MGMT_STATUS_INVALID_PARAMS, &cp->type,
+					sizeof(cp->type));
+		goto failed;
+	}
+
+	if (!discovery_type_is_valid(hdev, cp->type, &status)) {
+		err = mgmt_cmd_complete(sk, hdev->id,
+					MGMT_OP_START_SERVICE_DISCOVERY,
+					status, &cp->type, sizeof(cp->type));
+		goto failed;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_START_SERVICE_DISCOVERY,
+			       hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	cmd->cmd_complete = service_discovery_cmd_complete;
+
+	/* Clear the discovery filter first to free any previously
+	 * allocated memory for the UUID list.
+	 */
+	hci_discovery_filter_clear(hdev);
+
+	hdev->discovery.result_filtering = true;
+	hdev->discovery.type = cp->type;
+	hdev->discovery.rssi = cp->rssi;
+	hdev->discovery.uuid_count = uuid_count;
+
+	if (uuid_count > 0) {
+		hdev->discovery.uuids = kmemdup(cp->uuids, uuid_count * 16,
+						GFP_KERNEL);
+		if (!hdev->discovery.uuids) {
+			err = mgmt_cmd_complete(sk, hdev->id,
+						MGMT_OP_START_SERVICE_DISCOVERY,
+						MGMT_STATUS_FAILED,
+						&cp->type, sizeof(cp->type));
+			mgmt_pending_remove(cmd);
+			goto failed;
+		}
+	}
+
+	hci_discovery_set_state(hdev, DISCOVERY_STARTING);
+	queue_work(hdev->req_workqueue, &hdev->discov_update);
+	err = 0;
+
+failed:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	bt_dev_dbg(hdev, "status %d", status);
+
+	hci_dev_lock(hdev);
+
+	cmd = pending_find(MGMT_OP_STOP_DISCOVERY, hdev);
+	if (cmd) {
+		cmd->cmd_complete(cmd, mgmt_status(status));
+		mgmt_pending_remove(cmd);
+	}
+
+	hci_dev_unlock(hdev);
+
+	/* Handle suspend notifier */
+	if (test_and_clear_bit(SUSPEND_PAUSE_DISCOVERY, hdev->suspend_tasks)) {
+		bt_dev_dbg(hdev, "Paused discovery");
+		wake_up(&hdev->suspend_wait_q);
+	}
+}
+
+static int stop_discovery(struct sock *sk, struct hci_dev *hdev, void *data,
+			  u16 len)
+{
+	struct mgmt_cp_stop_discovery *mgmt_cp = data;
+	struct mgmt_pending_cmd *cmd;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	hci_dev_lock(hdev);
+
+	if (!hci_discovery_active(hdev)) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_STOP_DISCOVERY,
+					MGMT_STATUS_REJECTED, &mgmt_cp->type,
+					sizeof(mgmt_cp->type));
+		goto unlock;
+	}
+
+	if (hdev->discovery.type != mgmt_cp->type) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_STOP_DISCOVERY,
+					MGMT_STATUS_INVALID_PARAMS,
+					&mgmt_cp->type, sizeof(mgmt_cp->type));
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_STOP_DISCOVERY, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	cmd->cmd_complete = generic_cmd_complete;
+
+	hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
+	queue_work(hdev->req_workqueue, &hdev->discov_update);
+	err = 0;
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int confirm_name(struct sock *sk, struct hci_dev *hdev, void *data,
+			u16 len)
+{
+	struct mgmt_cp_confirm_name *cp = data;
+	struct inquiry_entry *e;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	hci_dev_lock(hdev);
+
+	if (!hci_discovery_active(hdev)) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_CONFIRM_NAME,
+					MGMT_STATUS_FAILED, &cp->addr,
+					sizeof(cp->addr));
+		goto failed;
+	}
+
+	e = hci_inquiry_cache_lookup_unknown(hdev, &cp->addr.bdaddr);
+	if (!e) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_CONFIRM_NAME,
+					MGMT_STATUS_INVALID_PARAMS, &cp->addr,
+					sizeof(cp->addr));
+		goto failed;
+	}
+
+	if (cp->name_known) {
+		e->name_state = NAME_KNOWN;
+		list_del(&e->list);
+	} else {
+		e->name_state = NAME_NEEDED;
+		hci_inquiry_cache_update_resolve(hdev, e);
+	}
+
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_CONFIRM_NAME, 0,
+				&cp->addr, sizeof(cp->addr));
+
+failed:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int block_device(struct sock *sk, struct hci_dev *hdev, void *data,
+			u16 len)
+{
+	struct mgmt_cp_block_device *cp = data;
+	u8 status;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!bdaddr_type_is_valid(cp->addr.type))
+		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_BLOCK_DEVICE,
+					 MGMT_STATUS_INVALID_PARAMS,
+					 &cp->addr, sizeof(cp->addr));
+
+	hci_dev_lock(hdev);
+
+	err = hci_bdaddr_list_add(&hdev->reject_list, &cp->addr.bdaddr,
+				  cp->addr.type);
+	if (err < 0) {
+		status = MGMT_STATUS_FAILED;
+		goto done;
+	}
+
+	mgmt_event(MGMT_EV_DEVICE_BLOCKED, hdev, &cp->addr, sizeof(cp->addr),
+		   sk);
+	status = MGMT_STATUS_SUCCESS;
+
+done:
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_BLOCK_DEVICE, status,
+				&cp->addr, sizeof(cp->addr));
+
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
+static int unblock_device(struct sock *sk, struct hci_dev *hdev, void *data,
+			  u16 len)
+{
+	struct mgmt_cp_unblock_device *cp = data;
+	u8 status;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!bdaddr_type_is_valid(cp->addr.type))
+		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_UNBLOCK_DEVICE,
+					 MGMT_STATUS_INVALID_PARAMS,
+					 &cp->addr, sizeof(cp->addr));
+
+	hci_dev_lock(hdev);
+
+	err = hci_bdaddr_list_del(&hdev->reject_list, &cp->addr.bdaddr,
+				  cp->addr.type);
+	if (err < 0) {
+		status = MGMT_STATUS_INVALID_PARAMS;
+		goto done;
+	}
+
+	mgmt_event(MGMT_EV_DEVICE_UNBLOCKED, hdev, &cp->addr, sizeof(cp->addr),
+		   sk);
+	status = MGMT_STATUS_SUCCESS;
+
+done:
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_UNBLOCK_DEVICE, status,
+				&cp->addr, sizeof(cp->addr));
+
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
+static int set_device_id(struct sock *sk, struct hci_dev *hdev, void *data,
+			 u16 len)
+{
+	struct mgmt_cp_set_device_id *cp = data;
+	struct hci_request req;
+	int err;
+	__u16 source;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	source = __le16_to_cpu(cp->source);
+
+	if (source > 0x0002)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DEVICE_ID,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	hdev->devid_source = source;
+	hdev->devid_vendor = __le16_to_cpu(cp->vendor);
+	hdev->devid_product = __le16_to_cpu(cp->product);
+	hdev->devid_version = __le16_to_cpu(cp->version);
+
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_DEVICE_ID, 0,
+				NULL, 0);
+
+	hci_req_init(&req, hdev);
+	__hci_req_update_eir(&req);
+	hci_req_run(&req, NULL);
+
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
+static void enable_advertising_instance(struct hci_dev *hdev, u8 status,
+					u16 opcode)
+{
+	bt_dev_dbg(hdev, "status %d", status);
+}
+
+static void set_advertising_complete(struct hci_dev *hdev, u8 status,
+				     u16 opcode)
+{
+	struct cmd_lookup match = { NULL, hdev };
+	struct hci_request req;
+	u8 instance;
+	struct adv_info *adv_instance;
+	int err;
+
+	hci_dev_lock(hdev);
+
+	if (status) {
+		u8 mgmt_err = mgmt_status(status);
+
+		mgmt_pending_foreach(MGMT_OP_SET_ADVERTISING, hdev,
+				     cmd_status_rsp, &mgmt_err);
+		goto unlock;
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_LE_ADV))
+		hci_dev_set_flag(hdev, HCI_ADVERTISING);
+	else
+		hci_dev_clear_flag(hdev, HCI_ADVERTISING);
+
+	mgmt_pending_foreach(MGMT_OP_SET_ADVERTISING, hdev, settings_rsp,
+			     &match);
+
+	new_settings(hdev, match.sk);
+
+	if (match.sk)
+		sock_put(match.sk);
+
+	/* Handle suspend notifier */
+	if (test_and_clear_bit(SUSPEND_PAUSE_ADVERTISING,
+			       hdev->suspend_tasks)) {
+		bt_dev_dbg(hdev, "Paused advertising");
+		wake_up(&hdev->suspend_wait_q);
+	} else if (test_and_clear_bit(SUSPEND_UNPAUSE_ADVERTISING,
+				      hdev->suspend_tasks)) {
+		bt_dev_dbg(hdev, "Unpaused advertising");
+		wake_up(&hdev->suspend_wait_q);
+	}
+
+	/* If "Set Advertising" was just disabled and instance advertising was
+	 * set up earlier, then re-enable multi-instance advertising.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
+	    list_empty(&hdev->adv_instances))
+		goto unlock;
+
+	instance = hdev->cur_adv_instance;
+	if (!instance) {
+		adv_instance = list_first_entry_or_null(&hdev->adv_instances,
+							struct adv_info, list);
+		if (!adv_instance)
+			goto unlock;
+
+		instance = adv_instance->instance;
+	}
+
+	hci_req_init(&req, hdev);
+
+	err = __hci_req_schedule_adv_instance(&req, instance, true);
+
+	if (!err)
+		err = hci_req_run(&req, enable_advertising_instance);
+
+	if (err)
+		bt_dev_err(hdev, "failed to re-configure advertising");
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int set_advertising(struct sock *sk, struct hci_dev *hdev, void *data,
+			   u16 len)
+{
+	struct mgmt_mode *cp = data;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_request req;
+	u8 val, status;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	status = mgmt_le_support(hdev);
+	if (status)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
+				       status);
+
+	/* Enabling the experimental LL Privay support disables support for
+	 * advertising.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	if (cp->val != 0x00 && cp->val != 0x01 && cp->val != 0x02)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	if (hdev->advertising_paused)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
+				       MGMT_STATUS_BUSY);
+
+	hci_dev_lock(hdev);
+
+	val = !!cp->val;
+
+	/* The following conditions are ones which mean that we should
+	 * not do any HCI communication but directly send a mgmt
+	 * response to user space (after toggling the flag if
+	 * necessary).
+	 */
+	if (!hdev_is_powered(hdev) ||
+	    (val == hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
+	     (cp->val == 0x02) == hci_dev_test_flag(hdev, HCI_ADVERTISING_CONNECTABLE)) ||
+	    hci_conn_num(hdev, LE_LINK) > 0 ||
+	    (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
+	     hdev->le_scan_type == LE_SCAN_ACTIVE)) {
+		bool changed;
+
+		if (cp->val) {
+			hdev->cur_adv_instance = 0x00;
+			changed = !hci_dev_test_and_set_flag(hdev, HCI_ADVERTISING);
+			if (cp->val == 0x02)
+				hci_dev_set_flag(hdev, HCI_ADVERTISING_CONNECTABLE);
+			else
+				hci_dev_clear_flag(hdev, HCI_ADVERTISING_CONNECTABLE);
+		} else {
+			changed = hci_dev_test_and_clear_flag(hdev, HCI_ADVERTISING);
+			hci_dev_clear_flag(hdev, HCI_ADVERTISING_CONNECTABLE);
+		}
+
+		err = send_settings_rsp(sk, MGMT_OP_SET_ADVERTISING, hdev);
+		if (err < 0)
+			goto unlock;
+
+		if (changed)
+			err = new_settings(hdev, sk);
+
+		goto unlock;
+	}
+
+	if (pending_find(MGMT_OP_SET_ADVERTISING, hdev) ||
+	    pending_find(MGMT_OP_SET_LE, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
+				      MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_SET_ADVERTISING, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	hci_req_init(&req, hdev);
+
+	if (cp->val == 0x02)
+		hci_dev_set_flag(hdev, HCI_ADVERTISING_CONNECTABLE);
+	else
+		hci_dev_clear_flag(hdev, HCI_ADVERTISING_CONNECTABLE);
+
+	cancel_adv_timeout(hdev);
+
+	if (val) {
+		/* Switch to instance "0" for the Set Advertising setting.
+		 * We cannot use update_[adv|scan_rsp]_data() here as the
+		 * HCI_ADVERTISING flag is not yet set.
+		 */
+		hdev->cur_adv_instance = 0x00;
+
+		if (ext_adv_capable(hdev)) {
+			__hci_req_start_ext_adv(&req, 0x00);
+		} else {
+			__hci_req_update_adv_data(&req, 0x00);
+			__hci_req_update_scan_rsp_data(&req, 0x00);
+			__hci_req_enable_advertising(&req);
+		}
+	} else {
+		__hci_req_disable_advertising(&req);
+	}
+
+	err = hci_req_run(&req, set_advertising_complete);
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int set_static_address(struct sock *sk, struct hci_dev *hdev,
+			      void *data, u16 len)
+{
+	struct mgmt_cp_set_static_address *cp = data;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!lmp_le_capable(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_STATIC_ADDRESS,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	if (hdev_is_powered(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_STATIC_ADDRESS,
+				       MGMT_STATUS_REJECTED);
+
+	if (bacmp(&cp->bdaddr, BDADDR_ANY)) {
+		if (!bacmp(&cp->bdaddr, BDADDR_NONE))
+			return mgmt_cmd_status(sk, hdev->id,
+					       MGMT_OP_SET_STATIC_ADDRESS,
+					       MGMT_STATUS_INVALID_PARAMS);
+
+		/* Two most significant bits shall be set */
+		if ((cp->bdaddr.b[5] & 0xc0) != 0xc0)
+			return mgmt_cmd_status(sk, hdev->id,
+					       MGMT_OP_SET_STATIC_ADDRESS,
+					       MGMT_STATUS_INVALID_PARAMS);
+	}
+
+	hci_dev_lock(hdev);
+
+	bacpy(&hdev->static_addr, &cp->bdaddr);
+
+	err = send_settings_rsp(sk, MGMT_OP_SET_STATIC_ADDRESS, hdev);
+	if (err < 0)
+		goto unlock;
+
+	err = new_settings(hdev, sk);
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int set_scan_params(struct sock *sk, struct hci_dev *hdev,
+			   void *data, u16 len)
+{
+	struct mgmt_cp_set_scan_params *cp = data;
+	__u16 interval, window;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!lmp_le_capable(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SCAN_PARAMS,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	interval = __le16_to_cpu(cp->interval);
+
+	if (interval < 0x0004 || interval > 0x4000)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SCAN_PARAMS,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	window = __le16_to_cpu(cp->window);
+
+	if (window < 0x0004 || window > 0x4000)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SCAN_PARAMS,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	if (window > interval)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SCAN_PARAMS,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	hdev->le_scan_interval = interval;
+	hdev->le_scan_window = window;
+
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_SCAN_PARAMS, 0,
+				NULL, 0);
+
+	/* If background scan is running, restart it so new parameters are
+	 * loaded.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
+	    hdev->discovery.state == DISCOVERY_STOPPED) {
+		struct hci_request req;
+
+		hci_req_init(&req, hdev);
+
+		hci_req_add_le_scan_disable(&req, false);
+		hci_req_add_le_passive_scan(&req);
+
+		hci_req_run(&req, NULL);
+	}
+
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
+static void fast_connectable_complete(struct hci_dev *hdev, u8 status,
+				      u16 opcode)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	bt_dev_dbg(hdev, "status 0x%02x", status);
+
+	hci_dev_lock(hdev);
+
+	cmd = pending_find(MGMT_OP_SET_FAST_CONNECTABLE, hdev);
+	if (!cmd)
+		goto unlock;
+
+	if (status) {
+		mgmt_cmd_status(cmd->sk, hdev->id, MGMT_OP_SET_FAST_CONNECTABLE,
+			        mgmt_status(status));
+	} else {
+		struct mgmt_mode *cp = cmd->param;
+
+		if (cp->val)
+			hci_dev_set_flag(hdev, HCI_FAST_CONNECTABLE);
+		else
+			hci_dev_clear_flag(hdev, HCI_FAST_CONNECTABLE);
+
+		send_settings_rsp(cmd->sk, MGMT_OP_SET_FAST_CONNECTABLE, hdev);
+		new_settings(hdev, cmd->sk);
+	}
+
+	mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int set_fast_connectable(struct sock *sk, struct hci_dev *hdev,
+				void *data, u16 len)
+{
+	struct mgmt_mode *cp = data;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_request req;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) ||
+	    hdev->hci_ver < BLUETOOTH_VER_1_2)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_FAST_CONNECTABLE,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	if (cp->val != 0x00 && cp->val != 0x01)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_FAST_CONNECTABLE,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	if (pending_find(MGMT_OP_SET_FAST_CONNECTABLE, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_FAST_CONNECTABLE,
+				      MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	if (!!cp->val == hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE)) {
+		err = send_settings_rsp(sk, MGMT_OP_SET_FAST_CONNECTABLE,
+					hdev);
+		goto unlock;
+	}
+
+	if (!hdev_is_powered(hdev)) {
+		hci_dev_change_flag(hdev, HCI_FAST_CONNECTABLE);
+		err = send_settings_rsp(sk, MGMT_OP_SET_FAST_CONNECTABLE,
+					hdev);
+		new_settings(hdev, sk);
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_SET_FAST_CONNECTABLE, hdev,
+			       data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	hci_req_init(&req, hdev);
+
+	__hci_req_write_fast_connectable(&req, cp->val);
+
+	err = hci_req_run(&req, fast_connectable_complete);
+	if (err < 0) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_FAST_CONNECTABLE,
+				      MGMT_STATUS_FAILED);
+		mgmt_pending_remove(cmd);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
+static void set_bredr_complete(struct hci_dev *hdev, u8 status, u16 opcode)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	bt_dev_dbg(hdev, "status 0x%02x", status);
+
+	hci_dev_lock(hdev);
+
+	cmd = pending_find(MGMT_OP_SET_BREDR, hdev);
+	if (!cmd)
+		goto unlock;
+
+	if (status) {
+		u8 mgmt_err = mgmt_status(status);
+
+		/* We need to restore the flag if related HCI commands
+		 * failed.
+		 */
+		hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
+
+		mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, mgmt_err);
+	} else {
+		send_settings_rsp(cmd->sk, MGMT_OP_SET_BREDR, hdev);
+		new_settings(hdev, cmd->sk);
+	}
+
+	mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int set_bredr(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
+{
+	struct mgmt_mode *cp = data;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_request req;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!lmp_bredr_capable(hdev) || !lmp_le_capable(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
+				       MGMT_STATUS_REJECTED);
+
+	if (cp->val != 0x00 && cp->val != 0x01)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	if (cp->val == hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
+		err = send_settings_rsp(sk, MGMT_OP_SET_BREDR, hdev);
+		goto unlock;
+	}
+
+	if (!hdev_is_powered(hdev)) {
+		if (!cp->val) {
+			hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
+			hci_dev_clear_flag(hdev, HCI_SSP_ENABLED);
+			hci_dev_clear_flag(hdev, HCI_LINK_SECURITY);
+			hci_dev_clear_flag(hdev, HCI_FAST_CONNECTABLE);
+			hci_dev_clear_flag(hdev, HCI_HS_ENABLED);
+		}
+
+		hci_dev_change_flag(hdev, HCI_BREDR_ENABLED);
+
+		err = send_settings_rsp(sk, MGMT_OP_SET_BREDR, hdev);
+		if (err < 0)
+			goto unlock;
+
+		err = new_settings(hdev, sk);
+		goto unlock;
+	}
+
+	/* Reject disabling when powered on */
+	if (!cp->val) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
+				      MGMT_STATUS_REJECTED);
+		goto unlock;
+	} else {
+		/* When configuring a dual-mode controller to operate
+		 * with LE only and using a static address, then switching
+		 * BR/EDR back on is not allowed.
+		 *
+		 * Dual-mode controllers shall operate with the public
+		 * address as its identity address for BR/EDR and LE. So
+		 * reject the attempt to create an invalid configuration.
+		 *
+		 * The same restrictions applies when secure connections
+		 * has been enabled. For BR/EDR this is a controller feature
+		 * while for LE it is a host stack feature. This means that
+		 * switching BR/EDR back on when secure connections has been
+		 * enabled is not a supported transaction.
+		 */
+		if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
+		    (bacmp(&hdev->static_addr, BDADDR_ANY) ||
+		     hci_dev_test_flag(hdev, HCI_SC_ENABLED))) {
+			err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
+					      MGMT_STATUS_REJECTED);
+			goto unlock;
+		}
+	}
+
+	if (pending_find(MGMT_OP_SET_BREDR, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
+				      MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_SET_BREDR, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	/* We need to flip the bit already here so that
+	 * hci_req_update_adv_data generates the correct flags.
+	 */
+	hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
+
+	hci_req_init(&req, hdev);
+
+	__hci_req_write_fast_connectable(&req, false);
+	__hci_req_update_scan(&req);
+
+	/* Since only the advertising data flags will change, there
+	 * is no need to update the scan response data.
+	 */
+	__hci_req_update_adv_data(&req, hdev->cur_adv_instance);
+
+	err = hci_req_run(&req, set_bredr_complete);
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static void sc_enable_complete(struct hci_dev *hdev, u8 status, u16 opcode)
+{
+	struct mgmt_pending_cmd *cmd;
+	struct mgmt_mode *cp;
+
+	bt_dev_dbg(hdev, "status %u", status);
+
+	hci_dev_lock(hdev);
+
+	cmd = pending_find(MGMT_OP_SET_SECURE_CONN, hdev);
+	if (!cmd)
+		goto unlock;
+
+	if (status) {
+		mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode,
+			        mgmt_status(status));
+		goto remove;
+	}
+
+	cp = cmd->param;
+
+	switch (cp->val) {
+	case 0x00:
+		hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
+		hci_dev_clear_flag(hdev, HCI_SC_ONLY);
+		break;
+	case 0x01:
+		hci_dev_set_flag(hdev, HCI_SC_ENABLED);
+		hci_dev_clear_flag(hdev, HCI_SC_ONLY);
+		break;
+	case 0x02:
+		hci_dev_set_flag(hdev, HCI_SC_ENABLED);
+		hci_dev_set_flag(hdev, HCI_SC_ONLY);
+		break;
+	}
+
+	send_settings_rsp(cmd->sk, MGMT_OP_SET_SECURE_CONN, hdev);
+	new_settings(hdev, cmd->sk);
+
+remove:
+	mgmt_pending_remove(cmd);
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int set_secure_conn(struct sock *sk, struct hci_dev *hdev,
+			   void *data, u16 len)
+{
+	struct mgmt_mode *cp = data;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_request req;
+	u8 val;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!lmp_sc_capable(hdev) &&
+	    !hci_dev_test_flag(hdev, HCI_LE_ENABLED))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SECURE_CONN,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
+	    lmp_sc_capable(hdev) &&
+	    !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SECURE_CONN,
+				       MGMT_STATUS_REJECTED);
+
+	if (cp->val != 0x00 && cp->val != 0x01 && cp->val != 0x02)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SECURE_CONN,
+				  MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev) || !lmp_sc_capable(hdev) ||
+	    !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
+		bool changed;
+
+		if (cp->val) {
+			changed = !hci_dev_test_and_set_flag(hdev,
+							     HCI_SC_ENABLED);
+			if (cp->val == 0x02)
+				hci_dev_set_flag(hdev, HCI_SC_ONLY);
+			else
+				hci_dev_clear_flag(hdev, HCI_SC_ONLY);
+		} else {
+			changed = hci_dev_test_and_clear_flag(hdev,
+							      HCI_SC_ENABLED);
+			hci_dev_clear_flag(hdev, HCI_SC_ONLY);
+		}
+
+		err = send_settings_rsp(sk, MGMT_OP_SET_SECURE_CONN, hdev);
+		if (err < 0)
+			goto failed;
+
+		if (changed)
+			err = new_settings(hdev, sk);
+
+		goto failed;
+	}
+
+	if (pending_find(MGMT_OP_SET_SECURE_CONN, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SECURE_CONN,
+				      MGMT_STATUS_BUSY);
+		goto failed;
+	}
+
+	val = !!cp->val;
+
+	if (val == hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
+	    (cp->val == 0x02) == hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
+		err = send_settings_rsp(sk, MGMT_OP_SET_SECURE_CONN, hdev);
+		goto failed;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_SET_SECURE_CONN, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	hci_req_init(&req, hdev);
+	hci_req_add(&req, HCI_OP_WRITE_SC_SUPPORT, 1, &val);
+	err = hci_req_run(&req, sc_enable_complete);
+	if (err < 0) {
+		mgmt_pending_remove(cmd);
+		goto failed;
+	}
+
+failed:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int set_debug_keys(struct sock *sk, struct hci_dev *hdev,
+			  void *data, u16 len)
+{
+	struct mgmt_mode *cp = data;
+	bool changed, use_changed;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (cp->val != 0x00 && cp->val != 0x01 && cp->val != 0x02)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DEBUG_KEYS,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	if (cp->val)
+		changed = !hci_dev_test_and_set_flag(hdev, HCI_KEEP_DEBUG_KEYS);
+	else
+		changed = hci_dev_test_and_clear_flag(hdev,
+						      HCI_KEEP_DEBUG_KEYS);
+
+	if (cp->val == 0x02)
+		use_changed = !hci_dev_test_and_set_flag(hdev,
+							 HCI_USE_DEBUG_KEYS);
+	else
+		use_changed = hci_dev_test_and_clear_flag(hdev,
+							  HCI_USE_DEBUG_KEYS);
+
+	if (hdev_is_powered(hdev) && use_changed &&
+	    hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
+		u8 mode = (cp->val == 0x02) ? 0x01 : 0x00;
+		hci_send_cmd(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE,
+			     sizeof(mode), &mode);
+	}
+
+	err = send_settings_rsp(sk, MGMT_OP_SET_DEBUG_KEYS, hdev);
+	if (err < 0)
+		goto unlock;
+
+	if (changed)
+		err = new_settings(hdev, sk);
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int set_privacy(struct sock *sk, struct hci_dev *hdev, void *cp_data,
+		       u16 len)
+{
+	struct mgmt_cp_set_privacy *cp = cp_data;
+	bool changed;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!lmp_le_capable(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_PRIVACY,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	if (cp->privacy != 0x00 && cp->privacy != 0x01 && cp->privacy != 0x02)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_PRIVACY,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	if (hdev_is_powered(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_PRIVACY,
+				       MGMT_STATUS_REJECTED);
+
+	hci_dev_lock(hdev);
+
+	/* If user space supports this command it is also expected to
+	 * handle IRKs. Therefore, set the HCI_RPA_RESOLVING flag.
+	 */
+	hci_dev_set_flag(hdev, HCI_RPA_RESOLVING);
+
+	if (cp->privacy) {
+		changed = !hci_dev_test_and_set_flag(hdev, HCI_PRIVACY);
+		memcpy(hdev->irk, cp->irk, sizeof(hdev->irk));
+		hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
+		hci_adv_instances_set_rpa_expired(hdev, true);
+		if (cp->privacy == 0x02)
+			hci_dev_set_flag(hdev, HCI_LIMITED_PRIVACY);
+		else
+			hci_dev_clear_flag(hdev, HCI_LIMITED_PRIVACY);
+	} else {
+		changed = hci_dev_test_and_clear_flag(hdev, HCI_PRIVACY);
+		memset(hdev->irk, 0, sizeof(hdev->irk));
+		hci_dev_clear_flag(hdev, HCI_RPA_EXPIRED);
+		hci_adv_instances_set_rpa_expired(hdev, false);
+		hci_dev_clear_flag(hdev, HCI_LIMITED_PRIVACY);
+	}
+
+	err = send_settings_rsp(sk, MGMT_OP_SET_PRIVACY, hdev);
+	if (err < 0)
+		goto unlock;
+
+	if (changed)
+		err = new_settings(hdev, sk);
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static bool irk_is_valid(struct mgmt_irk_info *irk)
+{
+	switch (irk->addr.type) {
+	case BDADDR_LE_PUBLIC:
+		return true;
+
+	case BDADDR_LE_RANDOM:
+		/* Two most significant bits shall be set */
+		if ((irk->addr.bdaddr.b[5] & 0xc0) != 0xc0)
+			return false;
+		return true;
+	}
+
+	return false;
+}
+
+static int load_irks(struct sock *sk, struct hci_dev *hdev, void *cp_data,
+		     u16 len)
+{
+	struct mgmt_cp_load_irks *cp = cp_data;
+	const u16 max_irk_count = ((U16_MAX - sizeof(*cp)) /
+				   sizeof(struct mgmt_irk_info));
+	u16 irk_count, expected_len;
+	int i, err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!lmp_le_capable(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_IRKS,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	irk_count = __le16_to_cpu(cp->irk_count);
+	if (irk_count > max_irk_count) {
+		bt_dev_err(hdev, "load_irks: too big irk_count value %u",
+			   irk_count);
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_IRKS,
+				       MGMT_STATUS_INVALID_PARAMS);
+	}
+
+	expected_len = struct_size(cp, irks, irk_count);
+	if (expected_len != len) {
+		bt_dev_err(hdev, "load_irks: expected %u bytes, got %u bytes",
+			   expected_len, len);
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_IRKS,
+				       MGMT_STATUS_INVALID_PARAMS);
+	}
+
+	bt_dev_dbg(hdev, "irk_count %u", irk_count);
+
+	for (i = 0; i < irk_count; i++) {
+		struct mgmt_irk_info *key = &cp->irks[i];
+
+		if (!irk_is_valid(key))
+			return mgmt_cmd_status(sk, hdev->id,
+					       MGMT_OP_LOAD_IRKS,
+					       MGMT_STATUS_INVALID_PARAMS);
+	}
+
+	hci_dev_lock(hdev);
+
+	hci_smp_irks_clear(hdev);
+
+	for (i = 0; i < irk_count; i++) {
+		struct mgmt_irk_info *irk = &cp->irks[i];
+		u8 addr_type = le_addr_type(irk->addr.type);
+
+		if (hci_is_blocked_key(hdev,
+				       HCI_BLOCKED_KEY_TYPE_IRK,
+				       irk->val)) {
+			bt_dev_warn(hdev, "Skipping blocked IRK for %pMR",
+				    &irk->addr.bdaddr);
+			continue;
+		}
+
+		/* When using SMP over BR/EDR, the addr type should be set to BREDR */
+		if (irk->addr.type == BDADDR_BREDR)
+			addr_type = BDADDR_BREDR;
+
+		hci_add_irk(hdev, &irk->addr.bdaddr,
+			    addr_type, irk->val,
+			    BDADDR_ANY);
+	}
+
+	hci_dev_set_flag(hdev, HCI_RPA_RESOLVING);
+
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_LOAD_IRKS, 0, NULL, 0);
+
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
+static bool ltk_is_valid(struct mgmt_ltk_info *key)
+{
+	if (key->initiator != 0x00 && key->initiator != 0x01)
+		return false;
+
+	switch (key->addr.type) {
+	case BDADDR_LE_PUBLIC:
+		return true;
+
+	case BDADDR_LE_RANDOM:
+		/* Two most significant bits shall be set */
+		if ((key->addr.bdaddr.b[5] & 0xc0) != 0xc0)
+			return false;
+		return true;
+	}
+
+	return false;
+}
+
+static int load_long_term_keys(struct sock *sk, struct hci_dev *hdev,
+			       void *cp_data, u16 len)
+{
+	struct mgmt_cp_load_long_term_keys *cp = cp_data;
+	const u16 max_key_count = ((U16_MAX - sizeof(*cp)) /
+				   sizeof(struct mgmt_ltk_info));
+	u16 key_count, expected_len;
+	int i, err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!lmp_le_capable(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_LONG_TERM_KEYS,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	key_count = __le16_to_cpu(cp->key_count);
+	if (key_count > max_key_count) {
+		bt_dev_err(hdev, "load_ltks: too big key_count value %u",
+			   key_count);
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_LONG_TERM_KEYS,
+				       MGMT_STATUS_INVALID_PARAMS);
+	}
+
+	expected_len = struct_size(cp, keys, key_count);
+	if (expected_len != len) {
+		bt_dev_err(hdev, "load_keys: expected %u bytes, got %u bytes",
+			   expected_len, len);
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_LONG_TERM_KEYS,
+				       MGMT_STATUS_INVALID_PARAMS);
+	}
+
+	bt_dev_dbg(hdev, "key_count %u", key_count);
+
+	for (i = 0; i < key_count; i++) {
+		struct mgmt_ltk_info *key = &cp->keys[i];
+
+		if (!ltk_is_valid(key))
+			return mgmt_cmd_status(sk, hdev->id,
+					       MGMT_OP_LOAD_LONG_TERM_KEYS,
+					       MGMT_STATUS_INVALID_PARAMS);
+	}
+
+	hci_dev_lock(hdev);
+
+	hci_smp_ltks_clear(hdev);
+
+	for (i = 0; i < key_count; i++) {
+		struct mgmt_ltk_info *key = &cp->keys[i];
+		u8 type, authenticated;
+		u8 addr_type = le_addr_type(key->addr.type);
+
+		if (hci_is_blocked_key(hdev,
+				       HCI_BLOCKED_KEY_TYPE_LTK,
+				       key->val)) {
+			bt_dev_warn(hdev, "Skipping blocked LTK for %pMR",
+				    &key->addr.bdaddr);
+			continue;
+		}
+
+		switch (key->type) {
+		case MGMT_LTK_UNAUTHENTICATED:
+			authenticated = 0x00;
+			type = key->initiator ? SMP_LTK : SMP_LTK_RESPONDER;
+			break;
+		case MGMT_LTK_AUTHENTICATED:
+			authenticated = 0x01;
+			type = key->initiator ? SMP_LTK : SMP_LTK_RESPONDER;
+			break;
+		case MGMT_LTK_P256_UNAUTH:
+			authenticated = 0x00;
+			type = SMP_LTK_P256;
+			break;
+		case MGMT_LTK_P256_AUTH:
+			authenticated = 0x01;
+			type = SMP_LTK_P256;
+			break;
+		case MGMT_LTK_P256_DEBUG:
+			authenticated = 0x00;
+			type = SMP_LTK_P256_DEBUG;
+			fallthrough;
+		default:
+			continue;
+		}
+
+		/* When using SMP over BR/EDR, the addr type should be set to BREDR */
+		if (key->addr.type == BDADDR_BREDR)
+			addr_type = BDADDR_BREDR;
+
+		hci_add_ltk(hdev, &key->addr.bdaddr,
+			    addr_type, type, authenticated,
+			    key->val, key->enc_size, key->ediv, key->rand);
+	}
+
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_LOAD_LONG_TERM_KEYS, 0,
+			   NULL, 0);
+
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
+static int conn_info_cmd_complete(struct mgmt_pending_cmd *cmd, u8 status)
+{
+	struct hci_conn *conn = cmd->user_data;
+	struct mgmt_rp_get_conn_info rp;
+	int err;
+
+	memcpy(&rp.addr, cmd->param, sizeof(rp.addr));
+
+	if (status == MGMT_STATUS_SUCCESS) {
+		rp.rssi = conn->rssi;
+		rp.tx_power = conn->tx_power;
+		rp.max_tx_power = conn->max_tx_power;
+	} else {
+		rp.rssi = HCI_RSSI_INVALID;
+		rp.tx_power = HCI_TX_POWER_INVALID;
+		rp.max_tx_power = HCI_TX_POWER_INVALID;
+	}
+
+	err = mgmt_cmd_complete(cmd->sk, cmd->index, MGMT_OP_GET_CONN_INFO,
+				status, &rp, sizeof(rp));
+
+	hci_conn_drop(conn);
+	hci_conn_put(conn);
+
+	return err;
+}
+
+static void conn_info_refresh_complete(struct hci_dev *hdev, u8 hci_status,
+				       u16 opcode)
+{
+	struct hci_cp_read_rssi *cp;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_conn *conn;
+	u16 handle;
+	u8 status;
+
+	bt_dev_dbg(hdev, "status 0x%02x", hci_status);
+
+	hci_dev_lock(hdev);
+
+	/* Commands sent in request are either Read RSSI or Read Transmit Power
+	 * Level so we check which one was last sent to retrieve connection
+	 * handle.  Both commands have handle as first parameter so it's safe to
+	 * cast data on the same command struct.
+	 *
+	 * First command sent is always Read RSSI and we fail only if it fails.
+	 * In other case we simply override error to indicate success as we
+	 * already remembered if TX power value is actually valid.
+	 */
+	cp = hci_sent_cmd_data(hdev, HCI_OP_READ_RSSI);
+	if (!cp) {
+		cp = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER);
+		status = MGMT_STATUS_SUCCESS;
+	} else {
+		status = mgmt_status(hci_status);
+	}
+
+	if (!cp) {
+		bt_dev_err(hdev, "invalid sent_cmd in conn_info response");
+		goto unlock;
+	}
+
+	handle = __le16_to_cpu(cp->handle);
+	conn = hci_conn_hash_lookup_handle(hdev, handle);
+	if (!conn) {
+		bt_dev_err(hdev, "unknown handle (%d) in conn_info response",
+			   handle);
+		goto unlock;
+	}
+
+	cmd = pending_find_data(MGMT_OP_GET_CONN_INFO, hdev, conn);
+	if (!cmd)
+		goto unlock;
+
+	cmd->cmd_complete(cmd, status);
+	mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int get_conn_info(struct sock *sk, struct hci_dev *hdev, void *data,
+			 u16 len)
+{
+	struct mgmt_cp_get_conn_info *cp = data;
+	struct mgmt_rp_get_conn_info rp;
+	struct hci_conn *conn;
+	unsigned long conn_info_age;
+	int err = 0;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	memset(&rp, 0, sizeof(rp));
+	bacpy(&rp.addr.bdaddr, &cp->addr.bdaddr);
+	rp.addr.type = cp->addr.type;
+
+	if (!bdaddr_type_is_valid(cp->addr.type))
+		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CONN_INFO,
+					 MGMT_STATUS_INVALID_PARAMS,
+					 &rp, sizeof(rp));
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CONN_INFO,
+					MGMT_STATUS_NOT_POWERED, &rp,
+					sizeof(rp));
+		goto unlock;
+	}
+
+	if (cp->addr.type == BDADDR_BREDR)
+		conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK,
+					       &cp->addr.bdaddr);
+	else
+		conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, &cp->addr.bdaddr);
+
+	if (!conn || conn->state != BT_CONNECTED) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CONN_INFO,
+					MGMT_STATUS_NOT_CONNECTED, &rp,
+					sizeof(rp));
+		goto unlock;
+	}
+
+	if (pending_find_data(MGMT_OP_GET_CONN_INFO, hdev, conn)) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CONN_INFO,
+					MGMT_STATUS_BUSY, &rp, sizeof(rp));
+		goto unlock;
+	}
+
+	/* To avoid client trying to guess when to poll again for information we
+	 * calculate conn info age as random value between min/max set in hdev.
+	 */
+	conn_info_age = hdev->conn_info_min_age +
+			prandom_u32_max(hdev->conn_info_max_age -
+					hdev->conn_info_min_age);
+
+	/* Query controller to refresh cached values if they are too old or were
+	 * never read.
+	 */
+	if (time_after(jiffies, conn->conn_info_timestamp +
+		       msecs_to_jiffies(conn_info_age)) ||
+	    !conn->conn_info_timestamp) {
+		struct hci_request req;
+		struct hci_cp_read_tx_power req_txp_cp;
+		struct hci_cp_read_rssi req_rssi_cp;
+		struct mgmt_pending_cmd *cmd;
+
+		hci_req_init(&req, hdev);
+		req_rssi_cp.handle = cpu_to_le16(conn->handle);
+		hci_req_add(&req, HCI_OP_READ_RSSI, sizeof(req_rssi_cp),
+			    &req_rssi_cp);
+
+		/* For LE links TX power does not change thus we don't need to
+		 * query for it once value is known.
+		 */
+		if (!bdaddr_type_is_le(cp->addr.type) ||
+		    conn->tx_power == HCI_TX_POWER_INVALID) {
+			req_txp_cp.handle = cpu_to_le16(conn->handle);
+			req_txp_cp.type = 0x00;
+			hci_req_add(&req, HCI_OP_READ_TX_POWER,
+				    sizeof(req_txp_cp), &req_txp_cp);
+		}
+
+		/* Max TX power needs to be read only once per connection */
+		if (conn->max_tx_power == HCI_TX_POWER_INVALID) {
+			req_txp_cp.handle = cpu_to_le16(conn->handle);
+			req_txp_cp.type = 0x01;
+			hci_req_add(&req, HCI_OP_READ_TX_POWER,
+				    sizeof(req_txp_cp), &req_txp_cp);
+		}
+
+		err = hci_req_run(&req, conn_info_refresh_complete);
+		if (err < 0)
+			goto unlock;
+
+		cmd = mgmt_pending_add(sk, MGMT_OP_GET_CONN_INFO, hdev,
+				       data, len);
+		if (!cmd) {
+			err = -ENOMEM;
+			goto unlock;
+		}
+
+		hci_conn_hold(conn);
+		cmd->user_data = hci_conn_get(conn);
+		cmd->cmd_complete = conn_info_cmd_complete;
+
+		conn->conn_info_timestamp = jiffies;
+	} else {
+		/* Cache is valid, just reply with values cached in hci_conn */
+		rp.rssi = conn->rssi;
+		rp.tx_power = conn->tx_power;
+		rp.max_tx_power = conn->max_tx_power;
+
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CONN_INFO,
+					MGMT_STATUS_SUCCESS, &rp, sizeof(rp));
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int clock_info_cmd_complete(struct mgmt_pending_cmd *cmd, u8 status)
+{
+	struct hci_conn *conn = cmd->user_data;
+	struct mgmt_rp_get_clock_info rp;
+	struct hci_dev *hdev;
+	int err;
+
+	memset(&rp, 0, sizeof(rp));
+	memcpy(&rp.addr, cmd->param, sizeof(rp.addr));
+
+	if (status)
+		goto complete;
+
+	hdev = hci_dev_get(cmd->index);
+	if (hdev) {
+		rp.local_clock = cpu_to_le32(hdev->clock);
+		hci_dev_put(hdev);
+	}
+
+	if (conn) {
+		rp.piconet_clock = cpu_to_le32(conn->clock);
+		rp.accuracy = cpu_to_le16(conn->clock_accuracy);
+	}
+
+complete:
+	err = mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, status, &rp,
+				sizeof(rp));
+
+	if (conn) {
+		hci_conn_drop(conn);
+		hci_conn_put(conn);
+	}
+
+	return err;
+}
+
+static void get_clock_info_complete(struct hci_dev *hdev, u8 status, u16 opcode)
+{
+	struct hci_cp_read_clock *hci_cp;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_conn *conn;
+
+	bt_dev_dbg(hdev, "status %u", status);
+
+	hci_dev_lock(hdev);
+
+	hci_cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK);
+	if (!hci_cp)
+		goto unlock;
+
+	if (hci_cp->which) {
+		u16 handle = __le16_to_cpu(hci_cp->handle);
+		conn = hci_conn_hash_lookup_handle(hdev, handle);
+	} else {
+		conn = NULL;
+	}
+
+	cmd = pending_find_data(MGMT_OP_GET_CLOCK_INFO, hdev, conn);
+	if (!cmd)
+		goto unlock;
+
+	cmd->cmd_complete(cmd, mgmt_status(status));
+	mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int get_clock_info(struct sock *sk, struct hci_dev *hdev, void *data,
+			 u16 len)
+{
+	struct mgmt_cp_get_clock_info *cp = data;
+	struct mgmt_rp_get_clock_info rp;
+	struct hci_cp_read_clock hci_cp;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_request req;
+	struct hci_conn *conn;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	memset(&rp, 0, sizeof(rp));
+	bacpy(&rp.addr.bdaddr, &cp->addr.bdaddr);
+	rp.addr.type = cp->addr.type;
+
+	if (cp->addr.type != BDADDR_BREDR)
+		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CLOCK_INFO,
+					 MGMT_STATUS_INVALID_PARAMS,
+					 &rp, sizeof(rp));
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CLOCK_INFO,
+					MGMT_STATUS_NOT_POWERED, &rp,
+					sizeof(rp));
+		goto unlock;
+	}
+
+	if (bacmp(&cp->addr.bdaddr, BDADDR_ANY)) {
+		conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK,
+					       &cp->addr.bdaddr);
+		if (!conn || conn->state != BT_CONNECTED) {
+			err = mgmt_cmd_complete(sk, hdev->id,
+						MGMT_OP_GET_CLOCK_INFO,
+						MGMT_STATUS_NOT_CONNECTED,
+						&rp, sizeof(rp));
+			goto unlock;
+		}
+	} else {
+		conn = NULL;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_GET_CLOCK_INFO, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	cmd->cmd_complete = clock_info_cmd_complete;
+
+	hci_req_init(&req, hdev);
+
+	memset(&hci_cp, 0, sizeof(hci_cp));
+	hci_req_add(&req, HCI_OP_READ_CLOCK, sizeof(hci_cp), &hci_cp);
+
+	if (conn) {
+		hci_conn_hold(conn);
+		cmd->user_data = hci_conn_get(conn);
+
+		hci_cp.handle = cpu_to_le16(conn->handle);
+		hci_cp.which = 0x01; /* Piconet clock */
+		hci_req_add(&req, HCI_OP_READ_CLOCK, sizeof(hci_cp), &hci_cp);
+	}
+
+	err = hci_req_run(&req, get_clock_info_complete);
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
+{
+	struct hci_conn *conn;
+
+	conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, addr);
+	if (!conn)
+		return false;
+
+	if (conn->dst_type != type)
+		return false;
+
+	if (conn->state != BT_CONNECTED)
+		return false;
+
+	return true;
+}
+
+/* This function requires the caller holds hdev->lock */
+static int hci_conn_params_set(struct hci_dev *hdev, bdaddr_t *addr,
+			       u8 addr_type, u8 auto_connect)
+{
+	struct hci_conn_params *params;
+
+	params = hci_conn_params_add(hdev, addr, addr_type);
+	if (!params)
+		return -EIO;
+
+	if (params->auto_connect == auto_connect)
+		return 0;
+
+	list_del_init(&params->action);
+
+	switch (auto_connect) {
+	case HCI_AUTO_CONN_DISABLED:
+	case HCI_AUTO_CONN_LINK_LOSS:
+		/* If auto connect is being disabled when we're trying to
+		 * connect to device, keep connecting.
+		 */
+		if (params->explicit_connect)
+			list_add(&params->action, &hdev->pend_le_conns);
+		break;
+	case HCI_AUTO_CONN_REPORT:
+		if (params->explicit_connect)
+			list_add(&params->action, &hdev->pend_le_conns);
+		else
+			list_add(&params->action, &hdev->pend_le_reports);
+		break;
+	case HCI_AUTO_CONN_DIRECT:
+	case HCI_AUTO_CONN_ALWAYS:
+		if (!is_connected(hdev, addr, addr_type))
+			list_add(&params->action, &hdev->pend_le_conns);
+		break;
+	}
+
+	params->auto_connect = auto_connect;
+
+	bt_dev_dbg(hdev, "addr %pMR (type %u) auto_connect %u",
+		   addr, addr_type, auto_connect);
+
+	return 0;
+}
+
+static void device_added(struct sock *sk, struct hci_dev *hdev,
+			 bdaddr_t *bdaddr, u8 type, u8 action)
+{
+	struct mgmt_ev_device_added ev;
+
+	bacpy(&ev.addr.bdaddr, bdaddr);
+	ev.addr.type = type;
+	ev.action = action;
+
+	mgmt_event(MGMT_EV_DEVICE_ADDED, hdev, &ev, sizeof(ev), sk);
+}
+
+static int add_device(struct sock *sk, struct hci_dev *hdev,
+		      void *data, u16 len)
+{
+	struct mgmt_cp_add_device *cp = data;
+	u8 auto_conn, addr_type;
+	struct hci_conn_params *params;
+	int err;
+	u32 current_flags = 0;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!bdaddr_type_is_valid(cp->addr.type) ||
+	    !bacmp(&cp->addr.bdaddr, BDADDR_ANY))
+		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_ADD_DEVICE,
+					 MGMT_STATUS_INVALID_PARAMS,
+					 &cp->addr, sizeof(cp->addr));
+
+	if (cp->action != 0x00 && cp->action != 0x01 && cp->action != 0x02)
+		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_ADD_DEVICE,
+					 MGMT_STATUS_INVALID_PARAMS,
+					 &cp->addr, sizeof(cp->addr));
+
+	hci_dev_lock(hdev);
+
+	if (cp->addr.type == BDADDR_BREDR) {
+		/* Only incoming connections action is supported for now */
+		if (cp->action != 0x01) {
+			err = mgmt_cmd_complete(sk, hdev->id,
+						MGMT_OP_ADD_DEVICE,
+						MGMT_STATUS_INVALID_PARAMS,
+						&cp->addr, sizeof(cp->addr));
+			goto unlock;
+		}
+
+		err = hci_bdaddr_list_add_with_flags(&hdev->accept_list,
+						     &cp->addr.bdaddr,
+						     cp->addr.type, 0);
+		if (err)
+			goto unlock;
+
+		hci_req_update_scan(hdev);
+
+		goto added;
+	}
+
+	addr_type = le_addr_type(cp->addr.type);
+
+	if (cp->action == 0x02)
+		auto_conn = HCI_AUTO_CONN_ALWAYS;
+	else if (cp->action == 0x01)
+		auto_conn = HCI_AUTO_CONN_DIRECT;
+	else
+		auto_conn = HCI_AUTO_CONN_REPORT;
+
+	/* Kernel internally uses conn_params with resolvable private
+	 * address, but Add Device allows only identity addresses.
+	 * Make sure it is enforced before calling
+	 * hci_conn_params_lookup.
+	 */
+	if (!hci_is_identity_address(&cp->addr.bdaddr, addr_type)) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_ADD_DEVICE,
+					MGMT_STATUS_INVALID_PARAMS,
+					&cp->addr, sizeof(cp->addr));
+		goto unlock;
+	}
+
+	/* If the connection parameters don't exist for this device,
+	 * they will be created and configured with defaults.
+	 */
+	if (hci_conn_params_set(hdev, &cp->addr.bdaddr, addr_type,
+				auto_conn) < 0) {
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_ADD_DEVICE,
+					MGMT_STATUS_FAILED, &cp->addr,
+					sizeof(cp->addr));
+		goto unlock;
+	} else {
+		params = hci_conn_params_lookup(hdev, &cp->addr.bdaddr,
+						addr_type);
+		if (params)
+			current_flags = params->current_flags;
+	}
+
+	hci_update_background_scan(hdev);
+
+added:
+	device_added(sk, hdev, &cp->addr.bdaddr, cp->addr.type, cp->action);
+	device_flags_changed(NULL, hdev, &cp->addr.bdaddr, cp->addr.type,
+			     SUPPORTED_DEVICE_FLAGS(), current_flags);
+
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_ADD_DEVICE,
+				MGMT_STATUS_SUCCESS, &cp->addr,
+				sizeof(cp->addr));
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static void device_removed(struct sock *sk, struct hci_dev *hdev,
+			   bdaddr_t *bdaddr, u8 type)
+{
+	struct mgmt_ev_device_removed ev;
+
+	bacpy(&ev.addr.bdaddr, bdaddr);
+	ev.addr.type = type;
+
+	mgmt_event(MGMT_EV_DEVICE_REMOVED, hdev, &ev, sizeof(ev), sk);
+}
+
+static int remove_device(struct sock *sk, struct hci_dev *hdev,
+			 void *data, u16 len)
+{
+	struct mgmt_cp_remove_device *cp = data;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	hci_dev_lock(hdev);
+
+	if (bacmp(&cp->addr.bdaddr, BDADDR_ANY)) {
+		struct hci_conn_params *params;
+		u8 addr_type;
+
+		if (!bdaddr_type_is_valid(cp->addr.type)) {
+			err = mgmt_cmd_complete(sk, hdev->id,
+						MGMT_OP_REMOVE_DEVICE,
+						MGMT_STATUS_INVALID_PARAMS,
+						&cp->addr, sizeof(cp->addr));
+			goto unlock;
+		}
+
+		if (cp->addr.type == BDADDR_BREDR) {
+			err = hci_bdaddr_list_del(&hdev->accept_list,
+						  &cp->addr.bdaddr,
+						  cp->addr.type);
+			if (err) {
+				err = mgmt_cmd_complete(sk, hdev->id,
+							MGMT_OP_REMOVE_DEVICE,
+							MGMT_STATUS_INVALID_PARAMS,
+							&cp->addr,
+							sizeof(cp->addr));
+				goto unlock;
+			}
+
+			hci_req_update_scan(hdev);
+
+			device_removed(sk, hdev, &cp->addr.bdaddr,
+				       cp->addr.type);
+			goto complete;
+		}
+
+		addr_type = le_addr_type(cp->addr.type);
+
+		/* Kernel internally uses conn_params with resolvable private
+		 * address, but Remove Device allows only identity addresses.
+		 * Make sure it is enforced before calling
+		 * hci_conn_params_lookup.
+		 */
+		if (!hci_is_identity_address(&cp->addr.bdaddr, addr_type)) {
+			err = mgmt_cmd_complete(sk, hdev->id,
+						MGMT_OP_REMOVE_DEVICE,
+						MGMT_STATUS_INVALID_PARAMS,
+						&cp->addr, sizeof(cp->addr));
+			goto unlock;
+		}
+
+		params = hci_conn_params_lookup(hdev, &cp->addr.bdaddr,
+						addr_type);
+		if (!params) {
+			err = mgmt_cmd_complete(sk, hdev->id,
+						MGMT_OP_REMOVE_DEVICE,
+						MGMT_STATUS_INVALID_PARAMS,
+						&cp->addr, sizeof(cp->addr));
+			goto unlock;
+		}
+
+		if (params->auto_connect == HCI_AUTO_CONN_DISABLED ||
+		    params->auto_connect == HCI_AUTO_CONN_EXPLICIT) {
+			err = mgmt_cmd_complete(sk, hdev->id,
+						MGMT_OP_REMOVE_DEVICE,
+						MGMT_STATUS_INVALID_PARAMS,
+						&cp->addr, sizeof(cp->addr));
+			goto unlock;
+		}
+
+		list_del(&params->action);
+		list_del(&params->list);
+		kfree(params);
+		hci_update_background_scan(hdev);
+
+		device_removed(sk, hdev, &cp->addr.bdaddr, cp->addr.type);
+	} else {
+		struct hci_conn_params *p, *tmp;
+		struct bdaddr_list *b, *btmp;
+
+		if (cp->addr.type) {
+			err = mgmt_cmd_complete(sk, hdev->id,
+						MGMT_OP_REMOVE_DEVICE,
+						MGMT_STATUS_INVALID_PARAMS,
+						&cp->addr, sizeof(cp->addr));
+			goto unlock;
+		}
+
+		list_for_each_entry_safe(b, btmp, &hdev->accept_list, list) {
+			device_removed(sk, hdev, &b->bdaddr, b->bdaddr_type);
+			list_del(&b->list);
+			kfree(b);
+		}
+
+		hci_req_update_scan(hdev);
+
+		list_for_each_entry_safe(p, tmp, &hdev->le_conn_params, list) {
+			if (p->auto_connect == HCI_AUTO_CONN_DISABLED)
+				continue;
+			device_removed(sk, hdev, &p->addr, p->addr_type);
+			if (p->explicit_connect) {
+				p->auto_connect = HCI_AUTO_CONN_EXPLICIT;
+				continue;
+			}
+			list_del(&p->action);
+			list_del(&p->list);
+			kfree(p);
+		}
+
+		bt_dev_dbg(hdev, "All LE connection parameters were removed");
+
+		hci_update_background_scan(hdev);
+	}
+
+complete:
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_REMOVE_DEVICE,
+				MGMT_STATUS_SUCCESS, &cp->addr,
+				sizeof(cp->addr));
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int load_conn_param(struct sock *sk, struct hci_dev *hdev, void *data,
+			   u16 len)
+{
+	struct mgmt_cp_load_conn_param *cp = data;
+	const u16 max_param_count = ((U16_MAX - sizeof(*cp)) /
+				     sizeof(struct mgmt_conn_param));
+	u16 param_count, expected_len;
+	int i;
+
+	if (!lmp_le_capable(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_CONN_PARAM,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	param_count = __le16_to_cpu(cp->param_count);
+	if (param_count > max_param_count) {
+		bt_dev_err(hdev, "load_conn_param: too big param_count value %u",
+			   param_count);
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_CONN_PARAM,
+				       MGMT_STATUS_INVALID_PARAMS);
+	}
+
+	expected_len = struct_size(cp, params, param_count);
+	if (expected_len != len) {
+		bt_dev_err(hdev, "load_conn_param: expected %u bytes, got %u bytes",
+			   expected_len, len);
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_CONN_PARAM,
+				       MGMT_STATUS_INVALID_PARAMS);
+	}
+
+	bt_dev_dbg(hdev, "param_count %u", param_count);
+
+	hci_dev_lock(hdev);
+
+	hci_conn_params_clear_disabled(hdev);
+
+	for (i = 0; i < param_count; i++) {
+		struct mgmt_conn_param *param = &cp->params[i];
+		struct hci_conn_params *hci_param;
+		u16 min, max, latency, timeout;
+		u8 addr_type;
+
+		bt_dev_dbg(hdev, "Adding %pMR (type %u)", &param->addr.bdaddr,
+			   param->addr.type);
+
+		if (param->addr.type == BDADDR_LE_PUBLIC) {
+			addr_type = ADDR_LE_DEV_PUBLIC;
+		} else if (param->addr.type == BDADDR_LE_RANDOM) {
+			addr_type = ADDR_LE_DEV_RANDOM;
+		} else {
+			bt_dev_err(hdev, "ignoring invalid connection parameters");
+			continue;
+		}
+
+		min = le16_to_cpu(param->min_interval);
+		max = le16_to_cpu(param->max_interval);
+		latency = le16_to_cpu(param->latency);
+		timeout = le16_to_cpu(param->timeout);
+
+		bt_dev_dbg(hdev, "min 0x%04x max 0x%04x latency 0x%04x timeout 0x%04x",
+			   min, max, latency, timeout);
+
+		if (hci_check_conn_params(min, max, latency, timeout) < 0) {
+			bt_dev_err(hdev, "ignoring invalid connection parameters");
+			continue;
+		}
+
+		hci_param = hci_conn_params_add(hdev, &param->addr.bdaddr,
+						addr_type);
+		if (!hci_param) {
+			bt_dev_err(hdev, "failed to add connection parameters");
+			continue;
+		}
+
+		hci_param->conn_min_interval = min;
+		hci_param->conn_max_interval = max;
+		hci_param->conn_latency = latency;
+		hci_param->supervision_timeout = timeout;
+	}
+
+	hci_dev_unlock(hdev);
+
+	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_LOAD_CONN_PARAM, 0,
+				 NULL, 0);
+}
+
+static int set_external_config(struct sock *sk, struct hci_dev *hdev,
+			       void *data, u16 len)
+{
+	struct mgmt_cp_set_external_config *cp = data;
+	bool changed;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (hdev_is_powered(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_EXTERNAL_CONFIG,
+				       MGMT_STATUS_REJECTED);
+
+	if (cp->config != 0x00 && cp->config != 0x01)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_EXTERNAL_CONFIG,
+				         MGMT_STATUS_INVALID_PARAMS);
+
+	if (!test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_EXTERNAL_CONFIG,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	hci_dev_lock(hdev);
+
+	if (cp->config)
+		changed = !hci_dev_test_and_set_flag(hdev, HCI_EXT_CONFIGURED);
+	else
+		changed = hci_dev_test_and_clear_flag(hdev, HCI_EXT_CONFIGURED);
+
+	err = send_options_rsp(sk, MGMT_OP_SET_EXTERNAL_CONFIG, hdev);
+	if (err < 0)
+		goto unlock;
+
+	if (!changed)
+		goto unlock;
+
+	err = new_options(hdev, sk);
+
+	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) == is_configured(hdev)) {
+		mgmt_index_removed(hdev);
+
+		if (hci_dev_test_and_change_flag(hdev, HCI_UNCONFIGURED)) {
+			hci_dev_set_flag(hdev, HCI_CONFIG);
+			hci_dev_set_flag(hdev, HCI_AUTO_OFF);
+
+			queue_work(hdev->req_workqueue, &hdev->power_on);
+		} else {
+			set_bit(HCI_RAW, &hdev->flags);
+			mgmt_index_added(hdev);
+		}
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static int set_public_address(struct sock *sk, struct hci_dev *hdev,
+			      void *data, u16 len)
+{
+	struct mgmt_cp_set_public_address *cp = data;
+	bool changed;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (hdev_is_powered(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_PUBLIC_ADDRESS,
+				       MGMT_STATUS_REJECTED);
+
+	if (!bacmp(&cp->bdaddr, BDADDR_ANY))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_PUBLIC_ADDRESS,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	if (!hdev->set_bdaddr)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_PUBLIC_ADDRESS,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	hci_dev_lock(hdev);
+
+	changed = !!bacmp(&hdev->public_addr, &cp->bdaddr);
+	bacpy(&hdev->public_addr, &cp->bdaddr);
+
+	err = send_options_rsp(sk, MGMT_OP_SET_PUBLIC_ADDRESS, hdev);
+	if (err < 0)
+		goto unlock;
+
+	if (!changed)
+		goto unlock;
+
+	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
+		err = new_options(hdev, sk);
+
+	if (is_configured(hdev)) {
+		mgmt_index_removed(hdev);
+
+		hci_dev_clear_flag(hdev, HCI_UNCONFIGURED);
+
+		hci_dev_set_flag(hdev, HCI_CONFIG);
+		hci_dev_set_flag(hdev, HCI_AUTO_OFF);
+
+		queue_work(hdev->req_workqueue, &hdev->power_on);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
+
+static void read_local_oob_ext_data_complete(struct hci_dev *hdev, u8 status,
+					     u16 opcode, struct sk_buff *skb)
+{
+	const struct mgmt_cp_read_local_oob_ext_data *mgmt_cp;
+	struct mgmt_rp_read_local_oob_ext_data *mgmt_rp;
+	u8 *h192, *r192, *h256, *r256;
+	struct mgmt_pending_cmd *cmd;
+	u16 eir_len;
+	int err;
+
+	bt_dev_dbg(hdev, "status %u", status);
+
+	cmd = pending_find(MGMT_OP_READ_LOCAL_OOB_EXT_DATA, hdev);
+	if (!cmd)
+		return;
+
+	mgmt_cp = cmd->param;
+
+	if (status) {
+		status = mgmt_status(status);
+		eir_len = 0;
+
+		h192 = NULL;
+		r192 = NULL;
+		h256 = NULL;
+		r256 = NULL;
+	} else if (opcode == HCI_OP_READ_LOCAL_OOB_DATA) {
+		struct hci_rp_read_local_oob_data *rp;
+
+		if (skb->len != sizeof(*rp)) {
+			status = MGMT_STATUS_FAILED;
+			eir_len = 0;
+		} else {
+			status = MGMT_STATUS_SUCCESS;
+			rp = (void *)skb->data;
+
+			eir_len = 5 + 18 + 18;
+			h192 = rp->hash;
+			r192 = rp->rand;
+			h256 = NULL;
+			r256 = NULL;
+		}
+	} else {
+		struct hci_rp_read_local_oob_ext_data *rp;
+
+		if (skb->len != sizeof(*rp)) {
+			status = MGMT_STATUS_FAILED;
+			eir_len = 0;
+		} else {
+			status = MGMT_STATUS_SUCCESS;
+			rp = (void *)skb->data;
+
+			if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
+				eir_len = 5 + 18 + 18;
+				h192 = NULL;
+				r192 = NULL;
+			} else {
+				eir_len = 5 + 18 + 18 + 18 + 18;
+				h192 = rp->hash192;
+				r192 = rp->rand192;
+			}
+
+			h256 = rp->hash256;
+			r256 = rp->rand256;
+		}
+	}
+
+	mgmt_rp = kmalloc(sizeof(*mgmt_rp) + eir_len, GFP_KERNEL);
+	if (!mgmt_rp)
+		goto done;
+
+	if (status)
+		goto send_rsp;
+
+	eir_len = eir_append_data(mgmt_rp->eir, 0, EIR_CLASS_OF_DEV,
+				  hdev->dev_class, 3);
+
+	if (h192 && r192) {
+		eir_len = eir_append_data(mgmt_rp->eir, eir_len,
+					  EIR_SSP_HASH_C192, h192, 16);
+		eir_len = eir_append_data(mgmt_rp->eir, eir_len,
+					  EIR_SSP_RAND_R192, r192, 16);
+	}
+
+	if (h256 && r256) {
+		eir_len = eir_append_data(mgmt_rp->eir, eir_len,
+					  EIR_SSP_HASH_C256, h256, 16);
+		eir_len = eir_append_data(mgmt_rp->eir, eir_len,
+					  EIR_SSP_RAND_R256, r256, 16);
+	}
+
+send_rsp:
+	mgmt_rp->type = mgmt_cp->type;
+	mgmt_rp->eir_len = cpu_to_le16(eir_len);
+
+	err = mgmt_cmd_complete(cmd->sk, hdev->id,
+				MGMT_OP_READ_LOCAL_OOB_EXT_DATA, status,
+				mgmt_rp, sizeof(*mgmt_rp) + eir_len);
+	if (err < 0 || status)
+		goto done;
+
+	hci_sock_set_flag(cmd->sk, HCI_MGMT_OOB_DATA_EVENTS);
+
+	err = mgmt_limited_event(MGMT_EV_LOCAL_OOB_DATA_UPDATED, hdev,
+				 mgmt_rp, sizeof(*mgmt_rp) + eir_len,
+				 HCI_MGMT_OOB_DATA_EVENTS, cmd->sk);
+done:
+	kfree(mgmt_rp);
+	mgmt_pending_remove(cmd);
+}
+
+static int read_local_ssp_oob_req(struct hci_dev *hdev, struct sock *sk,
+				  struct mgmt_cp_read_local_oob_ext_data *cp)
+{
+	struct mgmt_pending_cmd *cmd;
+	struct hci_request req;
+	int err;
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_READ_LOCAL_OOB_EXT_DATA, hdev,
+			       cp, sizeof(*cp));
+	if (!cmd)
+		return -ENOMEM;
+
+	hci_req_init(&req, hdev);
+
+	if (bredr_sc_enabled(hdev))
+		hci_req_add(&req, HCI_OP_READ_LOCAL_OOB_EXT_DATA, 0, NULL);
+	else
+		hci_req_add(&req, HCI_OP_READ_LOCAL_OOB_DATA, 0, NULL);
+
+	err = hci_req_run_skb(&req, read_local_oob_ext_data_complete);
+	if (err < 0) {
+		mgmt_pending_remove(cmd);
+		return err;
+	}
+
+	return 0;
+}
+
+static int read_local_oob_ext_data(struct sock *sk, struct hci_dev *hdev,
+				   void *data, u16 data_len)
+{
+	struct mgmt_cp_read_local_oob_ext_data *cp = data;
+	struct mgmt_rp_read_local_oob_ext_data *rp;
+	size_t rp_len;
+	u16 eir_len;
+	u8 status, flags, role, addr[7], hash[16], rand[16];
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (hdev_is_powered(hdev)) {
+		switch (cp->type) {
+		case BIT(BDADDR_BREDR):
+			status = mgmt_bredr_support(hdev);
+			if (status)
+				eir_len = 0;
+			else
+				eir_len = 5;
+			break;
+		case (BIT(BDADDR_LE_PUBLIC) | BIT(BDADDR_LE_RANDOM)):
+			status = mgmt_le_support(hdev);
+			if (status)
+				eir_len = 0;
+			else
+				eir_len = 9 + 3 + 18 + 18 + 3;
+			break;
+		default:
+			status = MGMT_STATUS_INVALID_PARAMS;
+			eir_len = 0;
+			break;
+		}
+	} else {
+		status = MGMT_STATUS_NOT_POWERED;
+		eir_len = 0;
+	}
+
+	rp_len = sizeof(*rp) + eir_len;
+	rp = kmalloc(rp_len, GFP_ATOMIC);
+	if (!rp)
+		return -ENOMEM;
+
+	if (status)
+		goto complete;
+
+	hci_dev_lock(hdev);
+
+	eir_len = 0;
+	switch (cp->type) {
+	case BIT(BDADDR_BREDR):
+		if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
+			err = read_local_ssp_oob_req(hdev, sk, cp);
+			hci_dev_unlock(hdev);
+			if (!err)
+				goto done;
+
+			status = MGMT_STATUS_FAILED;
+			goto complete;
+		} else {
+			eir_len = eir_append_data(rp->eir, eir_len,
+						  EIR_CLASS_OF_DEV,
+						  hdev->dev_class, 3);
+		}
+		break;
+	case (BIT(BDADDR_LE_PUBLIC) | BIT(BDADDR_LE_RANDOM)):
+		if (hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
+		    smp_generate_oob(hdev, hash, rand) < 0) {
+			hci_dev_unlock(hdev);
+			status = MGMT_STATUS_FAILED;
+			goto complete;
+		}
+
+		/* This should return the active RPA, but since the RPA
+		 * is only programmed on demand, it is really hard to fill
+		 * this in at the moment. For now disallow retrieving
+		 * local out-of-band data when privacy is in use.
+		 *
+		 * Returning the identity address will not help here since
+		 * pairing happens before the identity resolving key is
+		 * known and thus the connection establishment happens
+		 * based on the RPA and not the identity address.
+		 */
+		if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
+			hci_dev_unlock(hdev);
+			status = MGMT_STATUS_REJECTED;
+			goto complete;
+		}
+
+		if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
+		   !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
+		   (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
+		    bacmp(&hdev->static_addr, BDADDR_ANY))) {
+			memcpy(addr, &hdev->static_addr, 6);
+			addr[6] = 0x01;
+		} else {
+			memcpy(addr, &hdev->bdaddr, 6);
+			addr[6] = 0x00;
+		}
+
+		eir_len = eir_append_data(rp->eir, eir_len, EIR_LE_BDADDR,
+					  addr, sizeof(addr));
+
+		if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
+			role = 0x02;
+		else
+			role = 0x01;
+
+		eir_len = eir_append_data(rp->eir, eir_len, EIR_LE_ROLE,
+					  &role, sizeof(role));
+
+		if (hci_dev_test_flag(hdev, HCI_SC_ENABLED)) {
+			eir_len = eir_append_data(rp->eir, eir_len,
+						  EIR_LE_SC_CONFIRM,
+						  hash, sizeof(hash));
+
+			eir_len = eir_append_data(rp->eir, eir_len,
+						  EIR_LE_SC_RANDOM,
+						  rand, sizeof(rand));
+		}
+
+		flags = mgmt_get_adv_discov_flags(hdev);
+
+		if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
+			flags |= LE_AD_NO_BREDR;
+
+		eir_len = eir_append_data(rp->eir, eir_len, EIR_FLAGS,
+					  &flags, sizeof(flags));
+		break;
+	}
+
+	hci_dev_unlock(hdev);
+
+	hci_sock_set_flag(sk, HCI_MGMT_OOB_DATA_EVENTS);
+
+	status = MGMT_STATUS_SUCCESS;
+
+complete:
+	rp->type = cp->type;
+	rp->eir_len = cpu_to_le16(eir_len);
+
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_LOCAL_OOB_EXT_DATA,
+				status, rp, sizeof(*rp) + eir_len);
+	if (err < 0 || status)
+		goto done;
+
+	err = mgmt_limited_event(MGMT_EV_LOCAL_OOB_DATA_UPDATED, hdev,
+				 rp, sizeof(*rp) + eir_len,
+				 HCI_MGMT_OOB_DATA_EVENTS, sk);
+
+done:
+	kfree(rp);
+
+	return err;
+}
+
+static u32 get_supported_adv_flags(struct hci_dev *hdev)
+{
+	u32 flags = 0;
+
+	flags |= MGMT_ADV_FLAG_CONNECTABLE;
+	flags |= MGMT_ADV_FLAG_DISCOV;
+	flags |= MGMT_ADV_FLAG_LIMITED_DISCOV;
+	flags |= MGMT_ADV_FLAG_MANAGED_FLAGS;
+	flags |= MGMT_ADV_FLAG_APPEARANCE;
+	flags |= MGMT_ADV_FLAG_LOCAL_NAME;
+
+	/* In extended adv TX_POWER returned from Set Adv Param
+	 * will be always valid.
+	 */
+	if ((hdev->adv_tx_power != HCI_TX_POWER_INVALID) ||
+	    ext_adv_capable(hdev))
+		flags |= MGMT_ADV_FLAG_TX_POWER;
+
+	if (ext_adv_capable(hdev)) {
+		flags |= MGMT_ADV_FLAG_SEC_1M;
+		flags |= MGMT_ADV_FLAG_HW_OFFLOAD;
+		flags |= MGMT_ADV_FLAG_CAN_SET_TX_POWER;
+
+		if (hdev->le_features[1] & HCI_LE_PHY_2M)
+			flags |= MGMT_ADV_FLAG_SEC_2M;
+
+		if (hdev->le_features[1] & HCI_LE_PHY_CODED)
+			flags |= MGMT_ADV_FLAG_SEC_CODED;
+	}
+
+	return flags;
+}
+
+static int read_adv_features(struct sock *sk, struct hci_dev *hdev,
+			     void *data, u16 data_len)
+{
+	struct mgmt_rp_read_adv_features *rp;
+	size_t rp_len;
+	int err;
+	struct adv_info *adv_instance;
+	u32 supported_flags;
+	u8 *instance;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!lmp_le_capable(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_READ_ADV_FEATURES,
+				       MGMT_STATUS_REJECTED);
+
+	/* Enabling the experimental LL Privay support disables support for
+	 * advertising.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	hci_dev_lock(hdev);
+
+	rp_len = sizeof(*rp) + hdev->adv_instance_cnt;
+	rp = kmalloc(rp_len, GFP_ATOMIC);
+	if (!rp) {
+		hci_dev_unlock(hdev);
+		return -ENOMEM;
+	}
+
+	supported_flags = get_supported_adv_flags(hdev);
+
+	rp->supported_flags = cpu_to_le32(supported_flags);
+	rp->max_adv_data_len = HCI_MAX_AD_LENGTH;
+	rp->max_scan_rsp_len = HCI_MAX_AD_LENGTH;
+	rp->max_instances = hdev->le_num_of_adv_sets;
+	rp->num_instances = hdev->adv_instance_cnt;
+
+	instance = rp->instance;
+	list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
+		*instance = adv_instance->instance;
+		instance++;
+	}
+
+	hci_dev_unlock(hdev);
+
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_ADV_FEATURES,
+				MGMT_STATUS_SUCCESS, rp, rp_len);
+
+	kfree(rp);
+
+	return err;
+}
+
+static u8 calculate_name_len(struct hci_dev *hdev)
+{
+	u8 buf[HCI_MAX_SHORT_NAME_LENGTH + 3];
+
+	return append_local_name(hdev, buf, 0);
+}
+
+static u8 tlv_data_max_len(struct hci_dev *hdev, u32 adv_flags,
+			   bool is_adv_data)
+{
+	u8 max_len = HCI_MAX_AD_LENGTH;
+
+	if (is_adv_data) {
+		if (adv_flags & (MGMT_ADV_FLAG_DISCOV |
+				 MGMT_ADV_FLAG_LIMITED_DISCOV |
+				 MGMT_ADV_FLAG_MANAGED_FLAGS))
+			max_len -= 3;
+
+		if (adv_flags & MGMT_ADV_FLAG_TX_POWER)
+			max_len -= 3;
+	} else {
+		if (adv_flags & MGMT_ADV_FLAG_LOCAL_NAME)
+			max_len -= calculate_name_len(hdev);
+
+		if (adv_flags & (MGMT_ADV_FLAG_APPEARANCE))
+			max_len -= 4;
+	}
+
+	return max_len;
+}
+
+static bool flags_managed(u32 adv_flags)
+{
+	return adv_flags & (MGMT_ADV_FLAG_DISCOV |
+			    MGMT_ADV_FLAG_LIMITED_DISCOV |
+			    MGMT_ADV_FLAG_MANAGED_FLAGS);
+}
+
+static bool tx_power_managed(u32 adv_flags)
+{
+	return adv_flags & MGMT_ADV_FLAG_TX_POWER;
+}
+
+static bool name_managed(u32 adv_flags)
+{
+	return adv_flags & MGMT_ADV_FLAG_LOCAL_NAME;
+}
+
+static bool appearance_managed(u32 adv_flags)
+{
+	return adv_flags & MGMT_ADV_FLAG_APPEARANCE;
+}
+
+static bool tlv_data_is_valid(struct hci_dev *hdev, u32 adv_flags, u8 *data,
+			      u8 len, bool is_adv_data)
+{
+	int i, cur_len;
+	u8 max_len;
+
+	max_len = tlv_data_max_len(hdev, adv_flags, is_adv_data);
+
+	if (len > max_len)
+		return false;
+
+	/* Make sure that the data is correctly formatted. */
+	for (i = 0, cur_len = 0; i < len; i += (cur_len + 1)) {
+		cur_len = data[i];
+
+		if (!cur_len)
+			continue;
+
+		if (data[i + 1] == EIR_FLAGS &&
+		    (!is_adv_data || flags_managed(adv_flags)))
+			return false;
+
+		if (data[i + 1] == EIR_TX_POWER && tx_power_managed(adv_flags))
+			return false;
+
+		if (data[i + 1] == EIR_NAME_COMPLETE && name_managed(adv_flags))
+			return false;
+
+		if (data[i + 1] == EIR_NAME_SHORT && name_managed(adv_flags))
+			return false;
+
+		if (data[i + 1] == EIR_APPEARANCE &&
+		    appearance_managed(adv_flags))
+			return false;
+
+		/* If the current field length would exceed the total data
+		 * length, then it's invalid.
+		 */
+		if (i + cur_len >= len)
+			return false;
+	}
+
+	return true;
+}
+
+static void add_advertising_complete(struct hci_dev *hdev, u8 status,
+				     u16 opcode)
+{
+	struct mgmt_pending_cmd *cmd;
+	struct mgmt_cp_add_advertising *cp;
+	struct mgmt_rp_add_advertising rp;
+	struct adv_info *adv_instance, *n;
+	u8 instance;
+
+	bt_dev_dbg(hdev, "status %d", status);
+
+	hci_dev_lock(hdev);
+
+	cmd = pending_find(MGMT_OP_ADD_ADVERTISING, hdev);
+
+	list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
+		if (!adv_instance->pending)
+			continue;
+
+		if (!status) {
+			adv_instance->pending = false;
+			continue;
+		}
+
+		instance = adv_instance->instance;
+
+		if (hdev->cur_adv_instance == instance)
+			cancel_adv_timeout(hdev);
+
+		hci_remove_adv_instance(hdev, instance);
+		mgmt_advertising_removed(cmd ? cmd->sk : NULL, hdev, instance);
+	}
+
+	if (!cmd)
+		goto unlock;
+
+	cp = cmd->param;
+	rp.instance = cp->instance;
+
+	if (status)
+		mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode,
+				mgmt_status(status));
+	else
+		mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode,
+				  mgmt_status(status), &rp, sizeof(rp));
+
+	mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int add_advertising(struct sock *sk, struct hci_dev *hdev,
+			   void *data, u16 data_len)
+{
+	struct mgmt_cp_add_advertising *cp = data;
+	struct mgmt_rp_add_advertising rp;
+	u32 flags;
+	u32 supported_flags, phy_flags;
+	u8 status;
+	u16 timeout, duration;
+	unsigned int prev_instance_cnt = hdev->adv_instance_cnt;
+	u8 schedule_instance = 0;
+	struct adv_info *next_instance;
+	int err;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_request req;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	status = mgmt_le_support(hdev);
+	if (status)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
+				       status);
+
+	/* Enabling the experimental LL Privay support disables support for
+	 * advertising.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	if (cp->instance < 1 || cp->instance > hdev->le_num_of_adv_sets)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	if (data_len != sizeof(*cp) + cp->adv_data_len + cp->scan_rsp_len)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	flags = __le32_to_cpu(cp->flags);
+	timeout = __le16_to_cpu(cp->timeout);
+	duration = __le16_to_cpu(cp->duration);
+
+	/* The current implementation only supports a subset of the specified
+	 * flags. Also need to check mutual exclusiveness of sec flags.
+	 */
+	supported_flags = get_supported_adv_flags(hdev);
+	phy_flags = flags & MGMT_ADV_FLAG_SEC_MASK;
+	if (flags & ~supported_flags ||
+	    ((phy_flags && (phy_flags ^ (phy_flags & -phy_flags)))))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	hci_dev_lock(hdev);
+
+	if (timeout && !hdev_is_powered(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
+				      MGMT_STATUS_REJECTED);
+		goto unlock;
+	}
+
+	if (pending_find(MGMT_OP_ADD_ADVERTISING, hdev) ||
+	    pending_find(MGMT_OP_REMOVE_ADVERTISING, hdev) ||
+	    pending_find(MGMT_OP_SET_LE, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
+				      MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	if (!tlv_data_is_valid(hdev, flags, cp->data, cp->adv_data_len, true) ||
+	    !tlv_data_is_valid(hdev, flags, cp->data + cp->adv_data_len,
+			       cp->scan_rsp_len, false)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
+				      MGMT_STATUS_INVALID_PARAMS);
+		goto unlock;
+	}
+
+	err = hci_add_adv_instance(hdev, cp->instance, flags,
+				   cp->adv_data_len, cp->data,
+				   cp->scan_rsp_len,
+				   cp->data + cp->adv_data_len,
+				   timeout, duration);
+	if (err < 0) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
+				      MGMT_STATUS_FAILED);
+		goto unlock;
+	}
+
+	/* Only trigger an advertising added event if a new instance was
+	 * actually added.
+	 */
+	if (hdev->adv_instance_cnt > prev_instance_cnt)
+		mgmt_advertising_added(sk, hdev, cp->instance);
+
+	if (hdev->cur_adv_instance == cp->instance) {
+		/* If the currently advertised instance is being changed then
+		 * cancel the current advertising and schedule the next
+		 * instance. If there is only one instance then the overridden
+		 * advertising data will be visible right away.
+		 */
+		cancel_adv_timeout(hdev);
+
+		next_instance = hci_get_next_instance(hdev, cp->instance);
+		if (next_instance)
+			schedule_instance = next_instance->instance;
+	} else if (!hdev->adv_instance_timeout) {
+		/* Immediately advertise the new instance if no other
+		 * instance is currently being advertised.
+		 */
+		schedule_instance = cp->instance;
+	}
+
+	/* If the HCI_ADVERTISING flag is set or the device isn't powered or
+	 * there is no instance to be advertised then we have no HCI
+	 * communication to make. Simply return.
+	 */
+	if (!hdev_is_powered(hdev) ||
+	    hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
+	    !schedule_instance) {
+		rp.instance = cp->instance;
+		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
+					MGMT_STATUS_SUCCESS, &rp, sizeof(rp));
+		goto unlock;
+	}
+
+	/* We're good to go, update advertising data, parameters, and start
+	 * advertising.
+	 */
+	cmd = mgmt_pending_add(sk, MGMT_OP_ADD_ADVERTISING, hdev, data,
+			       data_len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	hci_req_init(&req, hdev);
+
+	err = __hci_req_schedule_adv_instance(&req, schedule_instance, true);
+
+	if (!err)
+		err = hci_req_run(&req, add_advertising_complete);
+
+	if (err < 0) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
+				      MGMT_STATUS_FAILED);
+		mgmt_pending_remove(cmd);
+	}
+
+unlock:
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
+static void remove_advertising_complete(struct hci_dev *hdev, u8 status,
+					u16 opcode)
+{
+	struct mgmt_pending_cmd *cmd;
+	struct mgmt_cp_remove_advertising *cp;
+	struct mgmt_rp_remove_advertising rp;
+
+	bt_dev_dbg(hdev, "status %d", status);
+
+	hci_dev_lock(hdev);
+
+	/* A failure status here only means that we failed to disable
+	 * advertising. Otherwise, the advertising instance has been removed,
+	 * so report success.
+	 */
+	cmd = pending_find(MGMT_OP_REMOVE_ADVERTISING, hdev);
+	if (!cmd)
+		goto unlock;
+
+	cp = cmd->param;
+	rp.instance = cp->instance;
+
+	mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, MGMT_STATUS_SUCCESS,
+			  &rp, sizeof(rp));
+	mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int remove_advertising(struct sock *sk, struct hci_dev *hdev,
+			      void *data, u16 data_len)
+{
+	struct mgmt_cp_remove_advertising *cp = data;
+	struct mgmt_rp_remove_advertising rp;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_request req;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	/* Enabling the experimental LL Privay support disables support for
+	 * advertising.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
+				       MGMT_STATUS_NOT_SUPPORTED);
+
+	hci_dev_lock(hdev);
+
+	if (cp->instance && !hci_find_adv_instance(hdev, cp->instance)) {
+		err = mgmt_cmd_status(sk, hdev->id,
+				      MGMT_OP_REMOVE_ADVERTISING,
+				      MGMT_STATUS_INVALID_PARAMS);
+		goto unlock;
+	}
+
+	if (pending_find(MGMT_OP_ADD_ADVERTISING, hdev) ||
+	    pending_find(MGMT_OP_REMOVE_ADVERTISING, hdev) ||
+	    pending_find(MGMT_OP_SET_LE, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_REMOVE_ADVERTISING,
+				      MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	if (list_empty(&hdev->adv_instances)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_REMOVE_ADVERTISING,
+				      MGMT_STATUS_INVALID_PARAMS);
+		goto unlock;
+	}
+
+	hci_req_init(&req, hdev);
+
+	/* If we use extended advertising, instance is disabled and removed */
+	if (ext_adv_capable(hdev)) {
+		__hci_req_disable_ext_adv_instance(&req, cp->instance);
+		__hci_req_remove_ext_adv_instance(&req, cp->instance);
+	}
+
+	hci_req_clear_adv_instance(hdev, sk, &req, cp->instance, true);
+
+	if (list_empty(&hdev->adv_instances))
+		__hci_req_disable_advertising(&req);
+
+	/* If no HCI commands have been collected so far or the HCI_ADVERTISING
+	 * flag is set or the device isn't powered then we have no HCI
+	 * communication to make. Simply return.
+	 */
+	if (skb_queue_empty(&req.cmd_q) ||
+	    !hdev_is_powered(hdev) ||
+	    hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
+		hci_req_purge(&req);
+		rp.instance = cp->instance;
+		err = mgmt_cmd_complete(sk, hdev->id,
+					MGMT_OP_REMOVE_ADVERTISING,
+					MGMT_STATUS_SUCCESS, &rp, sizeof(rp));
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_REMOVE_ADVERTISING, hdev, data,
+			       data_len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	err = hci_req_run(&req, remove_advertising_complete);
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
+static int get_adv_size_info(struct sock *sk, struct hci_dev *hdev,
+			     void *data, u16 data_len)
+{
+	struct mgmt_cp_get_adv_size_info *cp = data;
+	struct mgmt_rp_get_adv_size_info rp;
+	u32 flags, supported_flags;
+	int err;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	if (!lmp_le_capable(hdev))
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_GET_ADV_SIZE_INFO,
+				       MGMT_STATUS_REJECTED);
+
+	if (cp->instance < 1 || cp->instance > hdev->le_num_of_adv_sets)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_GET_ADV_SIZE_INFO,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	flags = __le32_to_cpu(cp->flags);
+
+	/* The current implementation only supports a subset of the specified
+	 * flags.
+	 */
+	supported_flags = get_supported_adv_flags(hdev);
+	if (flags & ~supported_flags)
+		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_GET_ADV_SIZE_INFO,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	rp.instance = cp->instance;
+	rp.flags = cp->flags;
+	rp.max_adv_data_len = tlv_data_max_len(hdev, flags, true);
+	rp.max_scan_rsp_len = tlv_data_max_len(hdev, flags, false);
+
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_ADV_SIZE_INFO,
+				MGMT_STATUS_SUCCESS, &rp, sizeof(rp));
+
+	return err;
+}
+
+static const struct hci_mgmt_handler mgmt_handlers[] = {
+	{ NULL }, /* 0x0000 (no command) */
+	{ read_version,            MGMT_READ_VERSION_SIZE,
+						HCI_MGMT_NO_HDEV |
+						HCI_MGMT_UNTRUSTED },
+	{ read_commands,           MGMT_READ_COMMANDS_SIZE,
+						HCI_MGMT_NO_HDEV |
+						HCI_MGMT_UNTRUSTED },
+	{ read_index_list,         MGMT_READ_INDEX_LIST_SIZE,
+						HCI_MGMT_NO_HDEV |
+						HCI_MGMT_UNTRUSTED },
+	{ read_controller_info,    MGMT_READ_INFO_SIZE,
+						HCI_MGMT_UNTRUSTED },
+	{ set_powered,             MGMT_SETTING_SIZE },
+	{ set_discoverable,        MGMT_SET_DISCOVERABLE_SIZE },
+	{ set_connectable,         MGMT_SETTING_SIZE },
+	{ set_fast_connectable,    MGMT_SETTING_SIZE },
+	{ set_bondable,            MGMT_SETTING_SIZE },
+	{ set_link_security,       MGMT_SETTING_SIZE },
+	{ set_ssp,                 MGMT_SETTING_SIZE },
+	{ set_hs,                  MGMT_SETTING_SIZE },
+	{ set_le,                  MGMT_SETTING_SIZE },
+	{ set_dev_class,           MGMT_SET_DEV_CLASS_SIZE },
+	{ set_local_name,          MGMT_SET_LOCAL_NAME_SIZE },
+	{ add_uuid,                MGMT_ADD_UUID_SIZE },
+	{ remove_uuid,             MGMT_REMOVE_UUID_SIZE },
+	{ load_link_keys,          MGMT_LOAD_LINK_KEYS_SIZE,
+						HCI_MGMT_VAR_LEN },
+	{ load_long_term_keys,     MGMT_LOAD_LONG_TERM_KEYS_SIZE,
+						HCI_MGMT_VAR_LEN },
+	{ disconnect,              MGMT_DISCONNECT_SIZE },
+	{ get_connections,         MGMT_GET_CONNECTIONS_SIZE },
+	{ pin_code_reply,          MGMT_PIN_CODE_REPLY_SIZE },
+	{ pin_code_neg_reply,      MGMT_PIN_CODE_NEG_REPLY_SIZE },
+	{ set_io_capability,       MGMT_SET_IO_CAPABILITY_SIZE },
+	{ pair_device,             MGMT_PAIR_DEVICE_SIZE },
+	{ cancel_pair_device,      MGMT_CANCEL_PAIR_DEVICE_SIZE },
+	{ unpair_device,           MGMT_UNPAIR_DEVICE_SIZE },
+	{ user_confirm_reply,      MGMT_USER_CONFIRM_REPLY_SIZE },
+	{ user_confirm_neg_reply,  MGMT_USER_CONFIRM_NEG_REPLY_SIZE },
+	{ user_passkey_reply,      MGMT_USER_PASSKEY_REPLY_SIZE },
+	{ user_passkey_neg_reply,  MGMT_USER_PASSKEY_NEG_REPLY_SIZE },
+	{ read_local_oob_data,     MGMT_READ_LOCAL_OOB_DATA_SIZE },
+	{ add_remote_oob_data,     MGMT_ADD_REMOTE_OOB_DATA_SIZE,
+						HCI_MGMT_VAR_LEN },
+	{ remove_remote_oob_data,  MGMT_REMOVE_REMOTE_OOB_DATA_SIZE },
+	{ start_discovery,         MGMT_START_DISCOVERY_SIZE },
+	{ stop_discovery,          MGMT_STOP_DISCOVERY_SIZE },
+	{ confirm_name,            MGMT_CONFIRM_NAME_SIZE },
+	{ block_device,            MGMT_BLOCK_DEVICE_SIZE },
+	{ unblock_device,          MGMT_UNBLOCK_DEVICE_SIZE },
+	{ set_device_id,           MGMT_SET_DEVICE_ID_SIZE },
+	{ set_advertising,         MGMT_SETTING_SIZE },
+	{ set_bredr,               MGMT_SETTING_SIZE },
+	{ set_static_address,      MGMT_SET_STATIC_ADDRESS_SIZE },
+	{ set_scan_params,         MGMT_SET_SCAN_PARAMS_SIZE },
+	{ set_secure_conn,         MGMT_SETTING_SIZE },
+	{ set_debug_keys,          MGMT_SETTING_SIZE },
+	{ set_privacy,             MGMT_SET_PRIVACY_SIZE },
+	{ load_irks,               MGMT_LOAD_IRKS_SIZE,
+						HCI_MGMT_VAR_LEN },
+	{ get_conn_info,           MGMT_GET_CONN_INFO_SIZE },
+	{ get_clock_info,          MGMT_GET_CLOCK_INFO_SIZE },
+	{ add_device,              MGMT_ADD_DEVICE_SIZE },
+	{ remove_device,           MGMT_REMOVE_DEVICE_SIZE },
+	{ load_conn_param,         MGMT_LOAD_CONN_PARAM_SIZE,
+						HCI_MGMT_VAR_LEN },
+	{ read_unconf_index_list,  MGMT_READ_UNCONF_INDEX_LIST_SIZE,
+						HCI_MGMT_NO_HDEV |
+						HCI_MGMT_UNTRUSTED },
+	{ read_config_info,        MGMT_READ_CONFIG_INFO_SIZE,
+						HCI_MGMT_UNCONFIGURED |
+						HCI_MGMT_UNTRUSTED },
+	{ set_external_config,     MGMT_SET_EXTERNAL_CONFIG_SIZE,
+						HCI_MGMT_UNCONFIGURED },
+	{ set_public_address,      MGMT_SET_PUBLIC_ADDRESS_SIZE,
+						HCI_MGMT_UNCONFIGURED },
+	{ start_service_discovery, MGMT_START_SERVICE_DISCOVERY_SIZE,
+						HCI_MGMT_VAR_LEN },
+	{ read_local_oob_ext_data, MGMT_READ_LOCAL_OOB_EXT_DATA_SIZE },
+	{ read_ext_index_list,     MGMT_READ_EXT_INDEX_LIST_SIZE,
+						HCI_MGMT_NO_HDEV |
+						HCI_MGMT_UNTRUSTED },
+	{ read_adv_features,       MGMT_READ_ADV_FEATURES_SIZE },
+	{ add_advertising,	   MGMT_ADD_ADVERTISING_SIZE,
+						HCI_MGMT_VAR_LEN },
+	{ remove_advertising,	   MGMT_REMOVE_ADVERTISING_SIZE },
+	{ get_adv_size_info,       MGMT_GET_ADV_SIZE_INFO_SIZE },
+	{ start_limited_discovery, MGMT_START_DISCOVERY_SIZE },
+	{ read_ext_controller_info,MGMT_READ_EXT_INFO_SIZE,
+						HCI_MGMT_UNTRUSTED },
+	{ set_appearance,	   MGMT_SET_APPEARANCE_SIZE },
+	{ get_phy_configuration,   MGMT_GET_PHY_CONFIGURATION_SIZE },
+	{ set_phy_configuration,   MGMT_SET_PHY_CONFIGURATION_SIZE },
+	{ set_blocked_keys,	   MGMT_OP_SET_BLOCKED_KEYS_SIZE,
+						HCI_MGMT_VAR_LEN },
+	{ set_wideband_speech,	   MGMT_SETTING_SIZE },
+	{ read_security_info,      MGMT_READ_SECURITY_INFO_SIZE,
+						HCI_MGMT_UNTRUSTED },
+	{ read_exp_features_info,  MGMT_READ_EXP_FEATURES_INFO_SIZE,
+						HCI_MGMT_UNTRUSTED |
+						HCI_MGMT_HDEV_OPTIONAL },
+	{ set_exp_feature,         MGMT_SET_EXP_FEATURE_SIZE,
+						HCI_MGMT_VAR_LEN |
+						HCI_MGMT_HDEV_OPTIONAL },
+	{ read_def_system_config,  MGMT_READ_DEF_SYSTEM_CONFIG_SIZE,
+						HCI_MGMT_UNTRUSTED },
+	{ set_def_system_config,   MGMT_SET_DEF_SYSTEM_CONFIG_SIZE,
+						HCI_MGMT_VAR_LEN },
+	{ read_def_runtime_config, MGMT_READ_DEF_RUNTIME_CONFIG_SIZE,
+						HCI_MGMT_UNTRUSTED },
+	{ set_def_runtime_config,  MGMT_SET_DEF_RUNTIME_CONFIG_SIZE,
+						HCI_MGMT_VAR_LEN },
+	{ get_device_flags,        MGMT_GET_DEVICE_FLAGS_SIZE },
+	{ set_device_flags,        MGMT_SET_DEVICE_FLAGS_SIZE },
+	{ read_adv_mon_features,   MGMT_READ_ADV_MONITOR_FEATURES_SIZE },
+	{ add_adv_patterns_monitor,MGMT_ADD_ADV_PATTERNS_MONITOR_SIZE,
+						HCI_MGMT_VAR_LEN },
+	{ remove_adv_monitor,      MGMT_REMOVE_ADV_MONITOR_SIZE },
+};
+
+void mgmt_index_added(struct hci_dev *hdev)
+{
+	struct mgmt_ev_ext_index ev;
+
+	if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
+		return;
+
+	switch (hdev->dev_type) {
+	case HCI_PRIMARY:
+		if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
+			mgmt_index_event(MGMT_EV_UNCONF_INDEX_ADDED, hdev,
+					 NULL, 0, HCI_MGMT_UNCONF_INDEX_EVENTS);
+			ev.type = 0x01;
+		} else {
+			mgmt_index_event(MGMT_EV_INDEX_ADDED, hdev, NULL, 0,
+					 HCI_MGMT_INDEX_EVENTS);
+			ev.type = 0x00;
+		}
+		break;
+	case HCI_AMP:
+		ev.type = 0x02;
+		break;
+	default:
+		return;
+	}
+
+	ev.bus = hdev->bus;
+
+	mgmt_index_event(MGMT_EV_EXT_INDEX_ADDED, hdev, &ev, sizeof(ev),
+			 HCI_MGMT_EXT_INDEX_EVENTS);
+}
+
+void mgmt_index_removed(struct hci_dev *hdev)
+{
+	struct mgmt_ev_ext_index ev;
+	u8 status = MGMT_STATUS_INVALID_INDEX;
+
+	if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
+		return;
+
+	switch (hdev->dev_type) {
+	case HCI_PRIMARY:
+		mgmt_pending_foreach(0, hdev, cmd_complete_rsp, &status);
+
+		if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
+			mgmt_index_event(MGMT_EV_UNCONF_INDEX_REMOVED, hdev,
+					 NULL, 0, HCI_MGMT_UNCONF_INDEX_EVENTS);
+			ev.type = 0x01;
+		} else {
+			mgmt_index_event(MGMT_EV_INDEX_REMOVED, hdev, NULL, 0,
+					 HCI_MGMT_INDEX_EVENTS);
+			ev.type = 0x00;
+		}
+		break;
+	case HCI_AMP:
+		ev.type = 0x02;
+		break;
+	default:
+		return;
+	}
+
+	ev.bus = hdev->bus;
+
+	mgmt_index_event(MGMT_EV_EXT_INDEX_REMOVED, hdev, &ev, sizeof(ev),
+			 HCI_MGMT_EXT_INDEX_EVENTS);
+}
+
+/* This function requires the caller holds hdev->lock */
+static void restart_le_actions(struct hci_dev *hdev)
+{
+	struct hci_conn_params *p;
+
+	list_for_each_entry(p, &hdev->le_conn_params, list) {
+		/* Needed for AUTO_OFF case where might not "really"
+		 * have been powered off.
+		 */
+		list_del_init(&p->action);
+
+		switch (p->auto_connect) {
+		case HCI_AUTO_CONN_DIRECT:
+		case HCI_AUTO_CONN_ALWAYS:
+			list_add(&p->action, &hdev->pend_le_conns);
+			break;
+		case HCI_AUTO_CONN_REPORT:
+			list_add(&p->action, &hdev->pend_le_reports);
+			break;
+		default:
+			break;
+		}
+	}
+}
+
+void mgmt_power_on(struct hci_dev *hdev, int err)
+{
+	struct cmd_lookup match = { NULL, hdev };
+
+	bt_dev_dbg(hdev, "err %d", err);
+
+	hci_dev_lock(hdev);
+
+	if (!err) {
+		restart_le_actions(hdev);
+		hci_update_background_scan(hdev);
+	}
+
+	mgmt_pending_foreach(MGMT_OP_SET_POWERED, hdev, settings_rsp, &match);
+
+	new_settings(hdev, match.sk);
+
+	if (match.sk)
+		sock_put(match.sk);
+
+	hci_dev_unlock(hdev);
+}
+
+void __mgmt_power_off(struct hci_dev *hdev)
+{
+	struct cmd_lookup match = { NULL, hdev };
+	u8 status, zero_cod[] = { 0, 0, 0 };
+
+	mgmt_pending_foreach(MGMT_OP_SET_POWERED, hdev, settings_rsp, &match);
+
+	/* If the power off is because of hdev unregistration let
+	 * use the appropriate INVALID_INDEX status. Otherwise use
+	 * NOT_POWERED. We cover both scenarios here since later in
+	 * mgmt_index_removed() any hci_conn callbacks will have already
+	 * been triggered, potentially causing misleading DISCONNECTED
+	 * status responses.
+	 */
+	if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
+		status = MGMT_STATUS_INVALID_INDEX;
+	else
+		status = MGMT_STATUS_NOT_POWERED;
+
+	mgmt_pending_foreach(0, hdev, cmd_complete_rsp, &status);
+
+	if (memcmp(hdev->dev_class, zero_cod, sizeof(zero_cod)) != 0) {
+		mgmt_limited_event(MGMT_EV_CLASS_OF_DEV_CHANGED, hdev,
+				   zero_cod, sizeof(zero_cod),
+				   HCI_MGMT_DEV_CLASS_EVENTS, NULL);
+		ext_info_changed(hdev, NULL);
+	}
+
+	new_settings(hdev, match.sk);
+
+	if (match.sk)
+		sock_put(match.sk);
+}
+
+void mgmt_set_powered_failed(struct hci_dev *hdev, int err)
+{
+	struct mgmt_pending_cmd *cmd;
+	u8 status;
+
+	cmd = pending_find(MGMT_OP_SET_POWERED, hdev);
+	if (!cmd)
+		return;
+
+	if (err == -ERFKILL)
+		status = MGMT_STATUS_RFKILLED;
+	else
+		status = MGMT_STATUS_FAILED;
+
+	mgmt_cmd_status(cmd->sk, hdev->id, MGMT_OP_SET_POWERED, status);
+
+	mgmt_pending_remove(cmd);
+}
+
+void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
+		       bool persistent)
+{
+	struct mgmt_ev_new_link_key ev;
+
+	memset(&ev, 0, sizeof(ev));
+
+	ev.store_hint = persistent;
+	bacpy(&ev.key.addr.bdaddr, &key->bdaddr);
+	ev.key.addr.type = link_to_bdaddr(key->link_type, key->bdaddr_type);
+	ev.key.type = key->type;
+	memcpy(ev.key.val, key->val, HCI_LINK_KEY_SIZE);
+	ev.key.pin_len = key->pin_len;
+
+	mgmt_event(MGMT_EV_NEW_LINK_KEY, hdev, &ev, sizeof(ev), NULL);
+}
+
+static u8 mgmt_ltk_type(struct smp_ltk *ltk)
+{
+	switch (ltk->type) {
+	case SMP_LTK:
+	case SMP_LTK_RESPONDER:
+		if (ltk->authenticated)
+			return MGMT_LTK_AUTHENTICATED;
+		return MGMT_LTK_UNAUTHENTICATED;
+	case SMP_LTK_P256:
+		if (ltk->authenticated)
+			return MGMT_LTK_P256_AUTH;
+		return MGMT_LTK_P256_UNAUTH;
+	case SMP_LTK_P256_DEBUG:
+		return MGMT_LTK_P256_DEBUG;
+	}
+
+	return MGMT_LTK_UNAUTHENTICATED;
+}
+
+void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent)
+{
+	struct mgmt_ev_new_long_term_key ev;
+
+	memset(&ev, 0, sizeof(ev));
+
+	/* Devices using resolvable or non-resolvable random addresses
+	 * without providing an identity resolving key don't require
+	 * to store long term keys. Their addresses will change the
+	 * next time around.
+	 *
+	 * Only when a remote device provides an identity address
+	 * make sure the long term key is stored. If the remote
+	 * identity is known, the long term keys are internally
+	 * mapped to the identity address. So allow static random
+	 * and public addresses here.
+	 */
+	if (key->bdaddr_type == ADDR_LE_DEV_RANDOM &&
+	    (key->bdaddr.b[5] & 0xc0) != 0xc0)
+		ev.store_hint = 0x00;
+	else
+		ev.store_hint = persistent;
+
+	bacpy(&ev.key.addr.bdaddr, &key->bdaddr);
+	ev.key.addr.type = link_to_bdaddr(key->link_type, key->bdaddr_type);
+	ev.key.type = mgmt_ltk_type(key);
+	ev.key.enc_size = key->enc_size;
+	ev.key.ediv = key->ediv;
+	ev.key.rand = key->rand;
+
+	if (key->type == SMP_LTK)
+		ev.key.initiator = 1;
+
+	/* Make sure we copy only the significant bytes based on the
+	 * encryption key size, and set the rest of the value to zeroes.
+	 */
+	memcpy(ev.key.val, key->val, key->enc_size);
+	memset(ev.key.val + key->enc_size, 0,
+	       sizeof(ev.key.val) - key->enc_size);
+
+	mgmt_event(MGMT_EV_NEW_LONG_TERM_KEY, hdev, &ev, sizeof(ev), NULL);
+}
+
+void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent)
+{
+	struct mgmt_ev_new_irk ev;
+
+	memset(&ev, 0, sizeof(ev));
+
+	ev.store_hint = persistent;
+
+	bacpy(&ev.rpa, &irk->rpa);
+	bacpy(&ev.irk.addr.bdaddr, &irk->bdaddr);
+	ev.irk.addr.type = link_to_bdaddr(irk->link_type, irk->addr_type);
+	memcpy(ev.irk.val, irk->val, sizeof(irk->val));
+
+	mgmt_event(MGMT_EV_NEW_IRK, hdev, &ev, sizeof(ev), NULL);
+}
+
+void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
+		   bool persistent)
+{
+	struct mgmt_ev_new_csrk ev;
+
+	memset(&ev, 0, sizeof(ev));
+
+	/* Devices using resolvable or non-resolvable random addresses
+	 * without providing an identity resolving key don't require
+	 * to store signature resolving keys. Their addresses will change
+	 * the next time around.
+	 *
+	 * Only when a remote device provides an identity address
+	 * make sure the signature resolving key is stored. So allow
+	 * static random and public addresses here.
+	 */
+	if (csrk->bdaddr_type == ADDR_LE_DEV_RANDOM &&
+	    (csrk->bdaddr.b[5] & 0xc0) != 0xc0)
+		ev.store_hint = 0x00;
+	else
+		ev.store_hint = persistent;
+
+	bacpy(&ev.key.addr.bdaddr, &csrk->bdaddr);
+	ev.key.addr.type = link_to_bdaddr(csrk->link_type, csrk->bdaddr_type);
+	ev.key.type = csrk->type;
+	memcpy(ev.key.val, csrk->val, sizeof(csrk->val));
+
+	mgmt_event(MGMT_EV_NEW_CSRK, hdev, &ev, sizeof(ev), NULL);
+}
+
+void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
+			 u8 bdaddr_type, u8 store_hint, u16 min_interval,
+			 u16 max_interval, u16 latency, u16 timeout)
+{
+	struct mgmt_ev_new_conn_param ev;
+
+	if (!hci_is_identity_address(bdaddr, bdaddr_type))
+		return;
+
+	memset(&ev, 0, sizeof(ev));
+	bacpy(&ev.addr.bdaddr, bdaddr);
+	ev.addr.type = link_to_bdaddr(LE_LINK, bdaddr_type);
+	ev.store_hint = store_hint;
+	ev.min_interval = cpu_to_le16(min_interval);
+	ev.max_interval = cpu_to_le16(max_interval);
+	ev.latency = cpu_to_le16(latency);
+	ev.timeout = cpu_to_le16(timeout);
+
+	mgmt_event(MGMT_EV_NEW_CONN_PARAM, hdev, &ev, sizeof(ev), NULL);
+}
+
+void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
+			   u32 flags, u8 *name, u8 name_len)
+{
+	char buf[512];
+	struct mgmt_ev_device_connected *ev = (void *) buf;
+	u16 eir_len = 0;
+
+	bacpy(&ev->addr.bdaddr, &conn->dst);
+	ev->addr.type = link_to_bdaddr(conn->type, conn->dst_type);
+
+	ev->flags = __cpu_to_le32(flags);
+
+	/* We must ensure that the EIR Data fields are ordered and
+	 * unique. Keep it simple for now and avoid the problem by not
+	 * adding any BR/EDR data to the LE adv.
+	 */
+	if (conn->le_adv_data_len > 0) {
+		memcpy(&ev->eir[eir_len],
+		       conn->le_adv_data, conn->le_adv_data_len);
+		eir_len = conn->le_adv_data_len;
+	} else {
+		if (name_len > 0)
+			eir_len = eir_append_data(ev->eir, 0, EIR_NAME_COMPLETE,
+						  name, name_len);
+
+		if (memcmp(conn->dev_class, "\0\0\0", 3) != 0)
+			eir_len = eir_append_data(ev->eir, eir_len,
+						  EIR_CLASS_OF_DEV,
+						  conn->dev_class, 3);
+	}
+
+	ev->eir_len = cpu_to_le16(eir_len);
+
+	mgmt_event(MGMT_EV_DEVICE_CONNECTED, hdev, buf,
+		    sizeof(*ev) + eir_len, NULL);
+}
+
+static void disconnect_rsp(struct mgmt_pending_cmd *cmd, void *data)
+{
+	struct sock **sk = data;
+
+	cmd->cmd_complete(cmd, 0);
+
+	*sk = cmd->sk;
+	sock_hold(*sk);
+
+	mgmt_pending_remove(cmd);
+}
+
+static void unpair_device_rsp(struct mgmt_pending_cmd *cmd, void *data)
+{
+	struct hci_dev *hdev = data;
+	struct mgmt_cp_unpair_device *cp = cmd->param;
+
+	device_unpaired(hdev, &cp->addr.bdaddr, cp->addr.type, cmd->sk);
+
+	cmd->cmd_complete(cmd, 0);
+	mgmt_pending_remove(cmd);
+}
+
+bool mgmt_powering_down(struct hci_dev *hdev)
+{
+	struct mgmt_pending_cmd *cmd;
+	struct mgmt_mode *cp;
+
+	cmd = pending_find(MGMT_OP_SET_POWERED, hdev);
+	if (!cmd)
+		return false;
+
+	cp = cmd->param;
+	if (!cp->val)
+		return true;
+
+	return false;
+}
+
+void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
+			      u8 link_type, u8 addr_type, u8 reason,
+			      bool mgmt_connected)
+{
+	struct mgmt_ev_device_disconnected ev;
+	struct sock *sk = NULL;
+
+	/* The connection is still in hci_conn_hash so test for 1
+	 * instead of 0 to know if this is the last one.
+	 */
+	if (mgmt_powering_down(hdev) && hci_conn_count(hdev) == 1) {
+		cancel_delayed_work(&hdev->power_off);
+		queue_work(hdev->req_workqueue, &hdev->power_off.work);
+	}
+
+	if (!mgmt_connected)
+		return;
+
+	if (link_type != ACL_LINK && link_type != LE_LINK)
+		return;
+
+	mgmt_pending_foreach(MGMT_OP_DISCONNECT, hdev, disconnect_rsp, &sk);
+
+	bacpy(&ev.addr.bdaddr, bdaddr);
+	ev.addr.type = link_to_bdaddr(link_type, addr_type);
+	ev.reason = reason;
+
+	/* Report disconnects due to suspend */
+	if (hdev->suspended)
+		ev.reason = MGMT_DEV_DISCONN_LOCAL_HOST_SUSPEND;
+
+	mgmt_event(MGMT_EV_DEVICE_DISCONNECTED, hdev, &ev, sizeof(ev), sk);
+
+	if (sk)
+		sock_put(sk);
+
+	mgmt_pending_foreach(MGMT_OP_UNPAIR_DEVICE, hdev, unpair_device_rsp,
+			     hdev);
+}
+
+void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
+			    u8 link_type, u8 addr_type, u8 status)
+{
+	u8 bdaddr_type = link_to_bdaddr(link_type, addr_type);
+	struct mgmt_cp_disconnect *cp;
+	struct mgmt_pending_cmd *cmd;
+
+	mgmt_pending_foreach(MGMT_OP_UNPAIR_DEVICE, hdev, unpair_device_rsp,
+			     hdev);
+
+	cmd = pending_find(MGMT_OP_DISCONNECT, hdev);
+	if (!cmd)
+		return;
+
+	cp = cmd->param;
+
+	if (bacmp(bdaddr, &cp->addr.bdaddr))
+		return;
+
+	if (cp->addr.type != bdaddr_type)
+		return;
+
+	cmd->cmd_complete(cmd, mgmt_status(status));
+	mgmt_pending_remove(cmd);
+}
+
+void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
+			 u8 addr_type, u8 status)
+{
+	struct mgmt_ev_connect_failed ev;
+
+	/* The connection is still in hci_conn_hash so test for 1
+	 * instead of 0 to know if this is the last one.
+	 */
+	if (mgmt_powering_down(hdev) && hci_conn_count(hdev) == 1) {
+		cancel_delayed_work(&hdev->power_off);
+		queue_work(hdev->req_workqueue, &hdev->power_off.work);
+	}
+
+	bacpy(&ev.addr.bdaddr, bdaddr);
+	ev.addr.type = link_to_bdaddr(link_type, addr_type);
+	ev.status = mgmt_status(status);
+
+	mgmt_event(MGMT_EV_CONNECT_FAILED, hdev, &ev, sizeof(ev), NULL);
+}
+
+void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure)
+{
+	struct mgmt_ev_pin_code_request ev;
+
+	bacpy(&ev.addr.bdaddr, bdaddr);
+	ev.addr.type = BDADDR_BREDR;
+	ev.secure = secure;
+
+	mgmt_event(MGMT_EV_PIN_CODE_REQUEST, hdev, &ev, sizeof(ev), NULL);
+}
+
+void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
+				  u8 status)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	cmd = pending_find(MGMT_OP_PIN_CODE_REPLY, hdev);
+	if (!cmd)
+		return;
+
+	cmd->cmd_complete(cmd, mgmt_status(status));
+	mgmt_pending_remove(cmd);
+}
+
+void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
+				      u8 status)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	cmd = pending_find(MGMT_OP_PIN_CODE_NEG_REPLY, hdev);
+	if (!cmd)
+		return;
+
+	cmd->cmd_complete(cmd, mgmt_status(status));
+	mgmt_pending_remove(cmd);
+}
+
+int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
+			      u8 link_type, u8 addr_type, u32 value,
+			      u8 confirm_hint)
+{
+	struct mgmt_ev_user_confirm_request ev;
+
+	bt_dev_dbg(hdev, "bdaddr %pMR", bdaddr);
+
+	bacpy(&ev.addr.bdaddr, bdaddr);
+	ev.addr.type = link_to_bdaddr(link_type, addr_type);
+	ev.confirm_hint = confirm_hint;
+	ev.value = cpu_to_le32(value);
+
+	return mgmt_event(MGMT_EV_USER_CONFIRM_REQUEST, hdev, &ev, sizeof(ev),
+			  NULL);
+}
+
+int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
+			      u8 link_type, u8 addr_type)
+{
+	struct mgmt_ev_user_passkey_request ev;
+
+	bt_dev_dbg(hdev, "bdaddr %pMR", bdaddr);
+
+	bacpy(&ev.addr.bdaddr, bdaddr);
+	ev.addr.type = link_to_bdaddr(link_type, addr_type);
+
+	return mgmt_event(MGMT_EV_USER_PASSKEY_REQUEST, hdev, &ev, sizeof(ev),
+			  NULL);
+}
+
+static int user_pairing_resp_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
+				      u8 link_type, u8 addr_type, u8 status,
+				      u8 opcode)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	cmd = pending_find(opcode, hdev);
+	if (!cmd)
+		return -ENOENT;
+
+	cmd->cmd_complete(cmd, mgmt_status(status));
+	mgmt_pending_remove(cmd);
+
+	return 0;
+}
+
+int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
+				     u8 link_type, u8 addr_type, u8 status)
+{
+	return user_pairing_resp_complete(hdev, bdaddr, link_type, addr_type,
+					  status, MGMT_OP_USER_CONFIRM_REPLY);
+}
+
+int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
+					 u8 link_type, u8 addr_type, u8 status)
+{
+	return user_pairing_resp_complete(hdev, bdaddr, link_type, addr_type,
+					  status,
+					  MGMT_OP_USER_CONFIRM_NEG_REPLY);
+}
+
+int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
+				     u8 link_type, u8 addr_type, u8 status)
+{
+	return user_pairing_resp_complete(hdev, bdaddr, link_type, addr_type,
+					  status, MGMT_OP_USER_PASSKEY_REPLY);
+}
+
+int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
+					 u8 link_type, u8 addr_type, u8 status)
+{
+	return user_pairing_resp_complete(hdev, bdaddr, link_type, addr_type,
+					  status,
+					  MGMT_OP_USER_PASSKEY_NEG_REPLY);
+}
+
+int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
+			     u8 link_type, u8 addr_type, u32 passkey,
+			     u8 entered)
+{
+	struct mgmt_ev_passkey_notify ev;
+
+	bt_dev_dbg(hdev, "bdaddr %pMR", bdaddr);
+
+	bacpy(&ev.addr.bdaddr, bdaddr);
+	ev.addr.type = link_to_bdaddr(link_type, addr_type);
+	ev.passkey = __cpu_to_le32(passkey);
+	ev.entered = entered;
+
+	return mgmt_event(MGMT_EV_PASSKEY_NOTIFY, hdev, &ev, sizeof(ev), NULL);
+}
+
+void mgmt_auth_failed(struct hci_conn *conn, u8 hci_status)
+{
+	struct mgmt_ev_auth_failed ev;
+	struct mgmt_pending_cmd *cmd;
+	u8 status = mgmt_status(hci_status);
+
+	bacpy(&ev.addr.bdaddr, &conn->dst);
+	ev.addr.type = link_to_bdaddr(conn->type, conn->dst_type);
+	ev.status = status;
+
+	cmd = find_pairing(conn);
+
+	mgmt_event(MGMT_EV_AUTH_FAILED, conn->hdev, &ev, sizeof(ev),
+		    cmd ? cmd->sk : NULL);
+
+	if (cmd) {
+		cmd->cmd_complete(cmd, status);
+		mgmt_pending_remove(cmd);
+	}
+}
+
+void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status)
+{
+	struct cmd_lookup match = { NULL, hdev };
+	bool changed;
+
+	if (status) {
+		u8 mgmt_err = mgmt_status(status);
+		mgmt_pending_foreach(MGMT_OP_SET_LINK_SECURITY, hdev,
+				     cmd_status_rsp, &mgmt_err);
+		return;
+	}
+
+	if (test_bit(HCI_AUTH, &hdev->flags))
+		changed = !hci_dev_test_and_set_flag(hdev, HCI_LINK_SECURITY);
+	else
+		changed = hci_dev_test_and_clear_flag(hdev, HCI_LINK_SECURITY);
+
+	mgmt_pending_foreach(MGMT_OP_SET_LINK_SECURITY, hdev, settings_rsp,
+			     &match);
+
+	if (changed)
+		new_settings(hdev, match.sk);
+
+	if (match.sk)
+		sock_put(match.sk);
+}
+
+static void clear_eir(struct hci_request *req)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct hci_cp_write_eir cp;
+
+	if (!lmp_ext_inq_capable(hdev))
+		return;
+
+	memset(hdev->eir, 0, sizeof(hdev->eir));
+
+	memset(&cp, 0, sizeof(cp));
+
+	hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
+}
+
+void mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status)
+{
+	struct cmd_lookup match = { NULL, hdev };
+	struct hci_request req;
+	bool changed = false;
+
+	if (status) {
+		u8 mgmt_err = mgmt_status(status);
+
+		if (enable && hci_dev_test_and_clear_flag(hdev,
+							  HCI_SSP_ENABLED)) {
+			hci_dev_clear_flag(hdev, HCI_HS_ENABLED);
+			new_settings(hdev, NULL);
+		}
+
+		mgmt_pending_foreach(MGMT_OP_SET_SSP, hdev, cmd_status_rsp,
+				     &mgmt_err);
+		return;
+	}
+
+	if (enable) {
+		changed = !hci_dev_test_and_set_flag(hdev, HCI_SSP_ENABLED);
+	} else {
+		changed = hci_dev_test_and_clear_flag(hdev, HCI_SSP_ENABLED);
+		if (!changed)
+			changed = hci_dev_test_and_clear_flag(hdev,
+							      HCI_HS_ENABLED);
+		else
+			hci_dev_clear_flag(hdev, HCI_HS_ENABLED);
+	}
+
+	mgmt_pending_foreach(MGMT_OP_SET_SSP, hdev, settings_rsp, &match);
+
+	if (changed)
+		new_settings(hdev, match.sk);
+
+	if (match.sk)
+		sock_put(match.sk);
+
+	hci_req_init(&req, hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
+		if (hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS))
+			hci_req_add(&req, HCI_OP_WRITE_SSP_DEBUG_MODE,
+				    sizeof(enable), &enable);
+		__hci_req_update_eir(&req);
+	} else {
+		clear_eir(&req);
+	}
+
+	hci_req_run(&req, NULL);
+}
+
+static void sk_lookup(struct mgmt_pending_cmd *cmd, void *data)
+{
+	struct cmd_lookup *match = data;
+
+	if (match->sk == NULL) {
+		match->sk = cmd->sk;
+		sock_hold(match->sk);
+	}
+}
+
+void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
+				    u8 status)
+{
+	struct cmd_lookup match = { NULL, hdev, mgmt_status(status) };
+
+	mgmt_pending_foreach(MGMT_OP_SET_DEV_CLASS, hdev, sk_lookup, &match);
+	mgmt_pending_foreach(MGMT_OP_ADD_UUID, hdev, sk_lookup, &match);
+	mgmt_pending_foreach(MGMT_OP_REMOVE_UUID, hdev, sk_lookup, &match);
+
+	if (!status) {
+		mgmt_limited_event(MGMT_EV_CLASS_OF_DEV_CHANGED, hdev, dev_class,
+				   3, HCI_MGMT_DEV_CLASS_EVENTS, NULL);
+		ext_info_changed(hdev, NULL);
+	}
+
+	if (match.sk)
+		sock_put(match.sk);
+}
+
+void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status)
+{
+	struct mgmt_cp_set_local_name ev;
+	struct mgmt_pending_cmd *cmd;
+
+	if (status)
+		return;
+
+	memset(&ev, 0, sizeof(ev));
+	memcpy(ev.name, name, HCI_MAX_NAME_LENGTH);
+	memcpy(ev.short_name, hdev->short_name, HCI_MAX_SHORT_NAME_LENGTH);
+
+	cmd = pending_find(MGMT_OP_SET_LOCAL_NAME, hdev);
+	if (!cmd) {
+		memcpy(hdev->dev_name, name, sizeof(hdev->dev_name));
+
+		/* If this is a HCI command related to powering on the
+		 * HCI dev don't send any mgmt signals.
+		 */
+		if (pending_find(MGMT_OP_SET_POWERED, hdev))
+			return;
+	}
+
+	mgmt_limited_event(MGMT_EV_LOCAL_NAME_CHANGED, hdev, &ev, sizeof(ev),
+			   HCI_MGMT_LOCAL_NAME_EVENTS, cmd ? cmd->sk : NULL);
+	ext_info_changed(hdev, cmd ? cmd->sk : NULL);
+}
+
+static inline bool has_uuid(u8 *uuid, u16 uuid_count, u8 (*uuids)[16])
+{
+	int i;
+
+	for (i = 0; i < uuid_count; i++) {
+		if (!memcmp(uuid, uuids[i], 16))
+			return true;
+	}
+
+	return false;
+}
+
+static bool eir_has_uuids(u8 *eir, u16 eir_len, u16 uuid_count, u8 (*uuids)[16])
+{
+	u16 parsed = 0;
+
+	while (parsed < eir_len) {
+		u8 field_len = eir[0];
+		u8 uuid[16];
+		int i;
+
+		if (field_len == 0)
+			break;
+
+		if (eir_len - parsed < field_len + 1)
+			break;
+
+		switch (eir[1]) {
+		case EIR_UUID16_ALL:
+		case EIR_UUID16_SOME:
+			for (i = 0; i + 3 <= field_len; i += 2) {
+				memcpy(uuid, bluetooth_base_uuid, 16);
+				uuid[13] = eir[i + 3];
+				uuid[12] = eir[i + 2];
+				if (has_uuid(uuid, uuid_count, uuids))
+					return true;
+			}
+			break;
+		case EIR_UUID32_ALL:
+		case EIR_UUID32_SOME:
+			for (i = 0; i + 5 <= field_len; i += 4) {
+				memcpy(uuid, bluetooth_base_uuid, 16);
+				uuid[15] = eir[i + 5];
+				uuid[14] = eir[i + 4];
+				uuid[13] = eir[i + 3];
+				uuid[12] = eir[i + 2];
+				if (has_uuid(uuid, uuid_count, uuids))
+					return true;
+			}
+			break;
+		case EIR_UUID128_ALL:
+		case EIR_UUID128_SOME:
+			for (i = 0; i + 17 <= field_len; i += 16) {
+				memcpy(uuid, eir + i + 2, 16);
+				if (has_uuid(uuid, uuid_count, uuids))
+					return true;
+			}
+			break;
+		}
+
+		parsed += field_len + 1;
+		eir += field_len + 1;
+	}
+
+	return false;
+}
+
+static void restart_le_scan(struct hci_dev *hdev)
+{
+	/* If controller is not scanning we are done. */
+	if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
+		return;
+
+	if (time_after(jiffies + DISCOV_LE_RESTART_DELAY,
+		       hdev->discovery.scan_start +
+		       hdev->discovery.scan_duration))
+		return;
+
+	queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_restart,
+			   DISCOV_LE_RESTART_DELAY);
+}
+
+static bool is_filter_match(struct hci_dev *hdev, s8 rssi, u8 *eir,
+			    u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len)
+{
+	/* If a RSSI threshold has been specified, and
+	 * HCI_QUIRK_STRICT_DUPLICATE_FILTER is not set, then all results with
+	 * a RSSI smaller than the RSSI threshold will be dropped. If the quirk
+	 * is set, let it through for further processing, as we might need to
+	 * restart the scan.
+	 *
+	 * For BR/EDR devices (pre 1.2) providing no RSSI during inquiry,
+	 * the results are also dropped.
+	 */
+	if (hdev->discovery.rssi != HCI_RSSI_INVALID &&
+	    (rssi == HCI_RSSI_INVALID ||
+	    (rssi < hdev->discovery.rssi &&
+	     !test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks))))
+		return  false;
+
+	if (hdev->discovery.uuid_count != 0) {
+		/* If a list of UUIDs is provided in filter, results with no
+		 * matching UUID should be dropped.
+		 */
+		if (!eir_has_uuids(eir, eir_len, hdev->discovery.uuid_count,
+				   hdev->discovery.uuids) &&
+		    !eir_has_uuids(scan_rsp, scan_rsp_len,
+				   hdev->discovery.uuid_count,
+				   hdev->discovery.uuids))
+			return false;
+	}
+
+	/* If duplicate filtering does not report RSSI changes, then restart
+	 * scanning to ensure updated result with updated RSSI values.
+	 */
+	if (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks)) {
+		restart_le_scan(hdev);
+
+		/* Validate RSSI value against the RSSI threshold once more. */
+		if (hdev->discovery.rssi != HCI_RSSI_INVALID &&
+		    rssi < hdev->discovery.rssi)
+			return false;
+	}
+
+	return true;
+}
+
+void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
+		       u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
+		       u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len)
+{
+	char buf[512];
+	struct mgmt_ev_device_found *ev = (void *)buf;
+	size_t ev_size;
+
+	/* Don't send events for a non-kernel initiated discovery. With
+	 * LE one exception is if we have pend_le_reports > 0 in which
+	 * case we're doing passive scanning and want these events.
+	 */
+	if (!hci_discovery_active(hdev)) {
+		if (link_type == ACL_LINK)
+			return;
+		if (link_type == LE_LINK &&
+		    list_empty(&hdev->pend_le_reports) &&
+		    !hci_is_adv_monitoring(hdev)) {
+			return;
+		}
+	}
+
+	if (hdev->discovery.result_filtering) {
+		/* We are using service discovery */
+		if (!is_filter_match(hdev, rssi, eir, eir_len, scan_rsp,
+				     scan_rsp_len))
+			return;
+	}
+
+	if (hdev->discovery.limited) {
+		/* Check for limited discoverable bit */
+		if (dev_class) {
+			if (!(dev_class[1] & 0x20))
+				return;
+		} else {
+			u8 *flags = eir_get_data(eir, eir_len, EIR_FLAGS, NULL);
+			if (!flags || !(flags[0] & LE_AD_LIMITED))
+				return;
+		}
+	}
+
+	/* Make sure that the buffer is big enough. The 5 extra bytes
+	 * are for the potential CoD field.
+	 */
+	if (sizeof(*ev) + eir_len + scan_rsp_len + 5 > sizeof(buf))
+		return;
+
+	memset(buf, 0, sizeof(buf));
+
+	/* In case of device discovery with BR/EDR devices (pre 1.2), the
+	 * RSSI value was reported as 0 when not available. This behavior
+	 * is kept when using device discovery. This is required for full
+	 * backwards compatibility with the API.
+	 *
+	 * However when using service discovery, the value 127 will be
+	 * returned when the RSSI is not available.
+	 */
+	if (rssi == HCI_RSSI_INVALID && !hdev->discovery.report_invalid_rssi &&
+	    link_type == ACL_LINK)
+		rssi = 0;
+
+	bacpy(&ev->addr.bdaddr, bdaddr);
+	ev->addr.type = link_to_bdaddr(link_type, addr_type);
+	ev->rssi = rssi;
+	ev->flags = cpu_to_le32(flags);
+
+	if (eir_len > 0)
+		/* Copy EIR or advertising data into event */
+		memcpy(ev->eir, eir, eir_len);
+
+	if (dev_class && !eir_get_data(ev->eir, eir_len, EIR_CLASS_OF_DEV,
+				       NULL))
+		eir_len = eir_append_data(ev->eir, eir_len, EIR_CLASS_OF_DEV,
+					  dev_class, 3);
+
+	if (scan_rsp_len > 0)
+		/* Append scan response data to event */
+		memcpy(ev->eir + eir_len, scan_rsp, scan_rsp_len);
+
+	ev->eir_len = cpu_to_le16(eir_len + scan_rsp_len);
+	ev_size = sizeof(*ev) + eir_len + scan_rsp_len;
+
+	mgmt_event(MGMT_EV_DEVICE_FOUND, hdev, ev, ev_size, NULL);
+}
+
+void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
+		      u8 addr_type, s8 rssi, u8 *name, u8 name_len)
+{
+	struct mgmt_ev_device_found *ev;
+	char buf[sizeof(*ev) + HCI_MAX_NAME_LENGTH + 2];
+	u16 eir_len;
+
+	ev = (struct mgmt_ev_device_found *) buf;
+
+	memset(buf, 0, sizeof(buf));
+
+	bacpy(&ev->addr.bdaddr, bdaddr);
+	ev->addr.type = link_to_bdaddr(link_type, addr_type);
+	ev->rssi = rssi;
+
+	eir_len = eir_append_data(ev->eir, 0, EIR_NAME_COMPLETE, name,
+				  name_len);
+
+	ev->eir_len = cpu_to_le16(eir_len);
+
+	mgmt_event(MGMT_EV_DEVICE_FOUND, hdev, ev, sizeof(*ev) + eir_len, NULL);
+}
+
+void mgmt_discovering(struct hci_dev *hdev, u8 discovering)
+{
+	struct mgmt_ev_discovering ev;
+
+	bt_dev_dbg(hdev, "discovering %u", discovering);
+
+	memset(&ev, 0, sizeof(ev));
+	ev.type = hdev->discovery.type;
+	ev.discovering = discovering;
+
+	mgmt_event(MGMT_EV_DISCOVERING, hdev, &ev, sizeof(ev), NULL);
+}
+
+void mgmt_suspending(struct hci_dev *hdev, u8 state)
+{
+	struct mgmt_ev_controller_suspend ev;
+
+	ev.suspend_state = state;
+	mgmt_event(MGMT_EV_CONTROLLER_SUSPEND, hdev, &ev, sizeof(ev), NULL);
+}
+
+void mgmt_resuming(struct hci_dev *hdev, u8 reason, bdaddr_t *bdaddr,
+		   u8 addr_type)
+{
+	struct mgmt_ev_controller_resume ev;
+
+	ev.wake_reason = reason;
+	if (bdaddr) {
+		bacpy(&ev.addr.bdaddr, bdaddr);
+		ev.addr.type = addr_type;
+	} else {
+		memset(&ev.addr, 0, sizeof(ev.addr));
+	}
+
+	mgmt_event(MGMT_EV_CONTROLLER_RESUME, hdev, &ev, sizeof(ev), NULL);
+}
+
+static struct hci_mgmt_chan chan = {
+	.channel	= HCI_CHANNEL_CONTROL,
+	.handler_count	= ARRAY_SIZE(mgmt_handlers),
+	.handlers	= mgmt_handlers,
+	.hdev_init	= mgmt_init_hdev,
+};
+
+int mgmt_init(void)
+{
+	return hci_mgmt_chan_register(&chan);
+}
+
+void mgmt_exit(void)
+{
+	hci_mgmt_chan_unregister(&chan);
+}
diff --git a/net/bluetooth/mgmt_config.c b/net/bluetooth/mgmt_config.c
new file mode 100644
index 000000000..2d3ad288c
--- /dev/null
+++ b/net/bluetooth/mgmt_config.c
@@ -0,0 +1,293 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+/*
+ * Copyright (C) 2020 Google Corporation
+ */
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/mgmt.h>
+
+#include "mgmt_util.h"
+#include "mgmt_config.h"
+
+#define HDEV_PARAM_U16(_param_code_, _param_name_) \
+{ \
+	{ cpu_to_le16(_param_code_), sizeof(__u16) }, \
+	{ cpu_to_le16(hdev->_param_name_) } \
+}
+
+#define HDEV_PARAM_U16_JIFFIES_TO_MSECS(_param_code_, _param_name_) \
+{ \
+	{ cpu_to_le16(_param_code_), sizeof(__u16) }, \
+	{ cpu_to_le16(jiffies_to_msecs(hdev->_param_name_)) } \
+}
+
+int read_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
+			   u16 data_len)
+{
+	struct {
+		struct mgmt_tlv entry;
+		union {
+			/* This is a simplification for now since all values
+			 * are 16 bits.  In the future, this code may need
+			 * refactoring to account for variable length values
+			 * and properly calculate the required buffer size.
+			 */
+			__le16 value;
+		};
+	} __packed params[] = {
+		/* Please see mgmt-api.txt for documentation of these values */
+		HDEV_PARAM_U16(0x0000, def_page_scan_type),
+		HDEV_PARAM_U16(0x0001, def_page_scan_int),
+		HDEV_PARAM_U16(0x0002, def_page_scan_window),
+		HDEV_PARAM_U16(0x0003, def_inq_scan_type),
+		HDEV_PARAM_U16(0x0004, def_inq_scan_int),
+		HDEV_PARAM_U16(0x0005, def_inq_scan_window),
+		HDEV_PARAM_U16(0x0006, def_br_lsto),
+		HDEV_PARAM_U16(0x0007, def_page_timeout),
+		HDEV_PARAM_U16(0x0008, sniff_min_interval),
+		HDEV_PARAM_U16(0x0009, sniff_max_interval),
+		HDEV_PARAM_U16(0x000a, le_adv_min_interval),
+		HDEV_PARAM_U16(0x000b, le_adv_max_interval),
+		HDEV_PARAM_U16(0x000c, def_multi_adv_rotation_duration),
+		HDEV_PARAM_U16(0x000d, le_scan_interval),
+		HDEV_PARAM_U16(0x000e, le_scan_window),
+		HDEV_PARAM_U16(0x000f, le_scan_int_suspend),
+		HDEV_PARAM_U16(0x0010, le_scan_window_suspend),
+		HDEV_PARAM_U16(0x0011, le_scan_int_discovery),
+		HDEV_PARAM_U16(0x0012, le_scan_window_discovery),
+		HDEV_PARAM_U16(0x0013, le_scan_int_adv_monitor),
+		HDEV_PARAM_U16(0x0014, le_scan_window_adv_monitor),
+		HDEV_PARAM_U16(0x0015, le_scan_int_connect),
+		HDEV_PARAM_U16(0x0016, le_scan_window_connect),
+		HDEV_PARAM_U16(0x0017, le_conn_min_interval),
+		HDEV_PARAM_U16(0x0018, le_conn_max_interval),
+		HDEV_PARAM_U16(0x0019, le_conn_latency),
+		HDEV_PARAM_U16(0x001a, le_supv_timeout),
+		HDEV_PARAM_U16_JIFFIES_TO_MSECS(0x001b,
+						def_le_autoconnect_timeout),
+		HDEV_PARAM_U16(0x001d, advmon_allowlist_duration),
+		HDEV_PARAM_U16(0x001e, advmon_no_filter_duration),
+	};
+	struct mgmt_rp_read_def_system_config *rp = (void *)params;
+
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	return mgmt_cmd_complete(sk, hdev->id,
+				 MGMT_OP_READ_DEF_SYSTEM_CONFIG,
+				 0, rp, sizeof(params));
+}
+
+#define TO_TLV(x)		((struct mgmt_tlv *)(x))
+#define TLV_GET_LE16(tlv)	le16_to_cpu(*((__le16 *)(TO_TLV(tlv)->value)))
+
+int set_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
+			  u16 data_len)
+{
+	u16 buffer_left = data_len;
+	u8 *buffer = data;
+
+	if (buffer_left < sizeof(struct mgmt_tlv)) {
+		return mgmt_cmd_status(sk, hdev->id,
+				       MGMT_OP_SET_DEF_SYSTEM_CONFIG,
+				       MGMT_STATUS_INVALID_PARAMS);
+	}
+
+	/* First pass to validate the tlv */
+	while (buffer_left >= sizeof(struct mgmt_tlv)) {
+		const u8 len = TO_TLV(buffer)->length;
+		const u16 exp_len = sizeof(struct mgmt_tlv) +
+				    len;
+		const u16 type = le16_to_cpu(TO_TLV(buffer)->type);
+
+		if (buffer_left < exp_len) {
+			bt_dev_warn(hdev, "invalid len left %d, exp >= %d",
+				    buffer_left, exp_len);
+
+			return mgmt_cmd_status(sk, hdev->id,
+					MGMT_OP_SET_DEF_SYSTEM_CONFIG,
+					MGMT_STATUS_INVALID_PARAMS);
+		}
+
+		/* Please see mgmt-api.txt for documentation of these values */
+		switch (type) {
+		case 0x0000:
+		case 0x0001:
+		case 0x0002:
+		case 0x0003:
+		case 0x0004:
+		case 0x0005:
+		case 0x0006:
+		case 0x0007:
+		case 0x0008:
+		case 0x0009:
+		case 0x000a:
+		case 0x000b:
+		case 0x000c:
+		case 0x000d:
+		case 0x000e:
+		case 0x000f:
+		case 0x0010:
+		case 0x0011:
+		case 0x0012:
+		case 0x0013:
+		case 0x0014:
+		case 0x0015:
+		case 0x0016:
+		case 0x0017:
+		case 0x0018:
+		case 0x0019:
+		case 0x001a:
+		case 0x001b:
+		case 0x001d:
+		case 0x001e:
+			if (len != sizeof(u16)) {
+				bt_dev_warn(hdev, "invalid length %d, exp %zu for type %d",
+					    len, sizeof(u16), type);
+
+				return mgmt_cmd_status(sk, hdev->id,
+					MGMT_OP_SET_DEF_SYSTEM_CONFIG,
+					MGMT_STATUS_INVALID_PARAMS);
+			}
+			break;
+		default:
+			bt_dev_warn(hdev, "unsupported parameter %u", type);
+			break;
+		}
+
+		buffer_left -= exp_len;
+		buffer += exp_len;
+	}
+
+	buffer_left = data_len;
+	buffer = data;
+	while (buffer_left >= sizeof(struct mgmt_tlv)) {
+		const u8 len = TO_TLV(buffer)->length;
+		const u16 exp_len = sizeof(struct mgmt_tlv) +
+				    len;
+		const u16 type = le16_to_cpu(TO_TLV(buffer)->type);
+
+		switch (type) {
+		case 0x0000:
+			hdev->def_page_scan_type = TLV_GET_LE16(buffer);
+			break;
+		case 0x0001:
+			hdev->def_page_scan_int = TLV_GET_LE16(buffer);
+			break;
+		case 0x0002:
+			hdev->def_page_scan_window = TLV_GET_LE16(buffer);
+			break;
+		case 0x0003:
+			hdev->def_inq_scan_type = TLV_GET_LE16(buffer);
+			break;
+		case 0x0004:
+			hdev->def_inq_scan_int = TLV_GET_LE16(buffer);
+			break;
+		case 0x0005:
+			hdev->def_inq_scan_window = TLV_GET_LE16(buffer);
+			break;
+		case 0x0006:
+			hdev->def_br_lsto = TLV_GET_LE16(buffer);
+			break;
+		case 0x0007:
+			hdev->def_page_timeout = TLV_GET_LE16(buffer);
+			break;
+		case 0x0008:
+			hdev->sniff_min_interval = TLV_GET_LE16(buffer);
+			break;
+		case 0x0009:
+			hdev->sniff_max_interval = TLV_GET_LE16(buffer);
+			break;
+		case 0x000a:
+			hdev->le_adv_min_interval = TLV_GET_LE16(buffer);
+			break;
+		case 0x000b:
+			hdev->le_adv_max_interval = TLV_GET_LE16(buffer);
+			break;
+		case 0x000c:
+			hdev->def_multi_adv_rotation_duration =
+							   TLV_GET_LE16(buffer);
+			break;
+		case 0x000d:
+			hdev->le_scan_interval = TLV_GET_LE16(buffer);
+			break;
+		case 0x000e:
+			hdev->le_scan_window = TLV_GET_LE16(buffer);
+			break;
+		case 0x000f:
+			hdev->le_scan_int_suspend = TLV_GET_LE16(buffer);
+			break;
+		case 0x0010:
+			hdev->le_scan_window_suspend = TLV_GET_LE16(buffer);
+			break;
+		case 0x0011:
+			hdev->le_scan_int_discovery = TLV_GET_LE16(buffer);
+			break;
+		case 0x00012:
+			hdev->le_scan_window_discovery = TLV_GET_LE16(buffer);
+			break;
+		case 0x00013:
+			hdev->le_scan_int_adv_monitor = TLV_GET_LE16(buffer);
+			break;
+		case 0x00014:
+			hdev->le_scan_window_adv_monitor = TLV_GET_LE16(buffer);
+			break;
+		case 0x00015:
+			hdev->le_scan_int_connect = TLV_GET_LE16(buffer);
+			break;
+		case 0x00016:
+			hdev->le_scan_window_connect = TLV_GET_LE16(buffer);
+			break;
+		case 0x00017:
+			hdev->le_conn_min_interval = TLV_GET_LE16(buffer);
+			break;
+		case 0x00018:
+			hdev->le_conn_max_interval = TLV_GET_LE16(buffer);
+			break;
+		case 0x00019:
+			hdev->le_conn_latency = TLV_GET_LE16(buffer);
+			break;
+		case 0x0001a:
+			hdev->le_supv_timeout = TLV_GET_LE16(buffer);
+			break;
+		case 0x0001b:
+			hdev->def_le_autoconnect_timeout =
+					msecs_to_jiffies(TLV_GET_LE16(buffer));
+			break;
+		case 0x0001d:
+			hdev->advmon_allowlist_duration = TLV_GET_LE16(buffer);
+			break;
+		case 0x0001e:
+			hdev->advmon_no_filter_duration = TLV_GET_LE16(buffer);
+			break;
+		default:
+			bt_dev_warn(hdev, "unsupported parameter %u", type);
+			break;
+		}
+
+		buffer_left -= exp_len;
+		buffer += exp_len;
+	}
+
+	return mgmt_cmd_complete(sk, hdev->id,
+				 MGMT_OP_SET_DEF_SYSTEM_CONFIG, 0, NULL, 0);
+}
+
+int read_def_runtime_config(struct sock *sk, struct hci_dev *hdev, void *data,
+			    u16 data_len)
+{
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	return mgmt_cmd_complete(sk, hdev->id,
+				 MGMT_OP_READ_DEF_RUNTIME_CONFIG, 0, NULL, 0);
+}
+
+int set_def_runtime_config(struct sock *sk, struct hci_dev *hdev, void *data,
+			   u16 data_len)
+{
+	bt_dev_dbg(hdev, "sock %p", sk);
+
+	return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DEF_SYSTEM_CONFIG,
+			       MGMT_STATUS_INVALID_PARAMS);
+}
diff --git a/net/bluetooth/mgmt_config.h b/net/bluetooth/mgmt_config.h
new file mode 100644
index 000000000..a4965f107
--- /dev/null
+++ b/net/bluetooth/mgmt_config.h
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+/*
+ * Copyright (C) 2020 Google Corporation
+ */
+
+int read_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
+			   u16 data_len);
+
+int set_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
+			  u16 data_len);
+
+int read_def_runtime_config(struct sock *sk, struct hci_dev *hdev, void *data,
+			    u16 data_len);
+
+int set_def_runtime_config(struct sock *sk, struct hci_dev *hdev, void *data,
+			   u16 data_len);
diff --git a/net/bluetooth/mgmt_util.c b/net/bluetooth/mgmt_util.c
new file mode 100644
index 000000000..0d0a6d77b
--- /dev/null
+++ b/net/bluetooth/mgmt_util.c
@@ -0,0 +1,270 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+
+   Copyright (C) 2015  Intel Corporation
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#include <asm/unaligned.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/hci_mon.h>
+#include <net/bluetooth/mgmt.h>
+
+#include "mgmt_util.h"
+
+static struct sk_buff *create_monitor_ctrl_event(__le16 index, u32 cookie,
+						 u16 opcode, u16 len, void *buf)
+{
+	struct hci_mon_hdr *hdr;
+	struct sk_buff *skb;
+
+	skb = bt_skb_alloc(6 + len, GFP_ATOMIC);
+	if (!skb)
+		return NULL;
+
+	put_unaligned_le32(cookie, skb_put(skb, 4));
+	put_unaligned_le16(opcode, skb_put(skb, 2));
+
+	if (buf)
+		skb_put_data(skb, buf, len);
+
+	__net_timestamp(skb);
+
+	hdr = skb_push(skb, HCI_MON_HDR_SIZE);
+	hdr->opcode = cpu_to_le16(HCI_MON_CTRL_EVENT);
+	hdr->index = index;
+	hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
+
+	return skb;
+}
+
+int mgmt_send_event(u16 event, struct hci_dev *hdev, unsigned short channel,
+		    void *data, u16 data_len, int flag, struct sock *skip_sk)
+{
+	struct sk_buff *skb;
+	struct mgmt_hdr *hdr;
+
+	skb = alloc_skb(sizeof(*hdr) + data_len, GFP_KERNEL);
+	if (!skb)
+		return -ENOMEM;
+
+	hdr = skb_put(skb, sizeof(*hdr));
+	hdr->opcode = cpu_to_le16(event);
+	if (hdev)
+		hdr->index = cpu_to_le16(hdev->id);
+	else
+		hdr->index = cpu_to_le16(MGMT_INDEX_NONE);
+	hdr->len = cpu_to_le16(data_len);
+
+	if (data)
+		skb_put_data(skb, data, data_len);
+
+	/* Time stamp */
+	__net_timestamp(skb);
+
+	hci_send_to_channel(channel, skb, flag, skip_sk);
+
+	if (channel == HCI_CHANNEL_CONTROL)
+		hci_send_monitor_ctrl_event(hdev, event, data, data_len,
+					    skb_get_ktime(skb), flag, skip_sk);
+
+	kfree_skb(skb);
+	return 0;
+}
+
+int mgmt_cmd_status(struct sock *sk, u16 index, u16 cmd, u8 status)
+{
+	struct sk_buff *skb, *mskb;
+	struct mgmt_hdr *hdr;
+	struct mgmt_ev_cmd_status *ev;
+	int err;
+
+	BT_DBG("sock %p, index %u, cmd %u, status %u", sk, index, cmd, status);
+
+	skb = alloc_skb(sizeof(*hdr) + sizeof(*ev), GFP_KERNEL);
+	if (!skb)
+		return -ENOMEM;
+
+	hdr = skb_put(skb, sizeof(*hdr));
+
+	hdr->opcode = cpu_to_le16(MGMT_EV_CMD_STATUS);
+	hdr->index = cpu_to_le16(index);
+	hdr->len = cpu_to_le16(sizeof(*ev));
+
+	ev = skb_put(skb, sizeof(*ev));
+	ev->status = status;
+	ev->opcode = cpu_to_le16(cmd);
+
+	mskb = create_monitor_ctrl_event(hdr->index, hci_sock_get_cookie(sk),
+					 MGMT_EV_CMD_STATUS, sizeof(*ev), ev);
+	if (mskb)
+		skb->tstamp = mskb->tstamp;
+	else
+		__net_timestamp(skb);
+
+	err = sock_queue_rcv_skb(sk, skb);
+	if (err < 0)
+		kfree_skb(skb);
+
+	if (mskb) {
+		hci_send_to_channel(HCI_CHANNEL_MONITOR, mskb,
+				    HCI_SOCK_TRUSTED, NULL);
+		kfree_skb(mskb);
+	}
+
+	return err;
+}
+
+int mgmt_cmd_complete(struct sock *sk, u16 index, u16 cmd, u8 status,
+		      void *rp, size_t rp_len)
+{
+	struct sk_buff *skb, *mskb;
+	struct mgmt_hdr *hdr;
+	struct mgmt_ev_cmd_complete *ev;
+	int err;
+
+	BT_DBG("sock %p", sk);
+
+	skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + rp_len, GFP_KERNEL);
+	if (!skb)
+		return -ENOMEM;
+
+	hdr = skb_put(skb, sizeof(*hdr));
+
+	hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE);
+	hdr->index = cpu_to_le16(index);
+	hdr->len = cpu_to_le16(sizeof(*ev) + rp_len);
+
+	ev = skb_put(skb, sizeof(*ev) + rp_len);
+	ev->opcode = cpu_to_le16(cmd);
+	ev->status = status;
+
+	if (rp)
+		memcpy(ev->data, rp, rp_len);
+
+	mskb = create_monitor_ctrl_event(hdr->index, hci_sock_get_cookie(sk),
+					 MGMT_EV_CMD_COMPLETE,
+					 sizeof(*ev) + rp_len, ev);
+	if (mskb)
+		skb->tstamp = mskb->tstamp;
+	else
+		__net_timestamp(skb);
+
+	err = sock_queue_rcv_skb(sk, skb);
+	if (err < 0)
+		kfree_skb(skb);
+
+	if (mskb) {
+		hci_send_to_channel(HCI_CHANNEL_MONITOR, mskb,
+				    HCI_SOCK_TRUSTED, NULL);
+		kfree_skb(mskb);
+	}
+
+	return err;
+}
+
+struct mgmt_pending_cmd *mgmt_pending_find(unsigned short channel, u16 opcode,
+					   struct hci_dev *hdev)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	list_for_each_entry(cmd, &hdev->mgmt_pending, list) {
+		if (hci_sock_get_channel(cmd->sk) != channel)
+			continue;
+		if (cmd->opcode == opcode)
+			return cmd;
+	}
+
+	return NULL;
+}
+
+struct mgmt_pending_cmd *mgmt_pending_find_data(unsigned short channel,
+						u16 opcode,
+						struct hci_dev *hdev,
+						const void *data)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	list_for_each_entry(cmd, &hdev->mgmt_pending, list) {
+		if (cmd->user_data != data)
+			continue;
+		if (cmd->opcode == opcode)
+			return cmd;
+	}
+
+	return NULL;
+}
+
+void mgmt_pending_foreach(u16 opcode, struct hci_dev *hdev,
+			  void (*cb)(struct mgmt_pending_cmd *cmd, void *data),
+			  void *data)
+{
+	struct mgmt_pending_cmd *cmd, *tmp;
+
+	list_for_each_entry_safe(cmd, tmp, &hdev->mgmt_pending, list) {
+		if (opcode > 0 && cmd->opcode != opcode)
+			continue;
+
+		cb(cmd, data);
+	}
+}
+
+struct mgmt_pending_cmd *mgmt_pending_add(struct sock *sk, u16 opcode,
+					  struct hci_dev *hdev,
+					  void *data, u16 len)
+{
+	struct mgmt_pending_cmd *cmd;
+
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+	if (!cmd)
+		return NULL;
+
+	cmd->opcode = opcode;
+	cmd->index = hdev->id;
+
+	cmd->param = kmemdup(data, len, GFP_KERNEL);
+	if (!cmd->param) {
+		kfree(cmd);
+		return NULL;
+	}
+
+	cmd->param_len = len;
+
+	cmd->sk = sk;
+	sock_hold(sk);
+
+	list_add(&cmd->list, &hdev->mgmt_pending);
+
+	return cmd;
+}
+
+void mgmt_pending_free(struct mgmt_pending_cmd *cmd)
+{
+	sock_put(cmd->sk);
+	kfree(cmd->param);
+	kfree(cmd);
+}
+
+void mgmt_pending_remove(struct mgmt_pending_cmd *cmd)
+{
+	list_del(&cmd->list);
+	mgmt_pending_free(cmd);
+}
diff --git a/net/bluetooth/mgmt_util.h b/net/bluetooth/mgmt_util.h
new file mode 100644
index 000000000..6559f1892
--- /dev/null
+++ b/net/bluetooth/mgmt_util.h
@@ -0,0 +1,53 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2015  Intel Coropration
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+struct mgmt_pending_cmd {
+	struct list_head list;
+	u16 opcode;
+	int index;
+	void *param;
+	size_t param_len;
+	struct sock *sk;
+	void *user_data;
+	int (*cmd_complete)(struct mgmt_pending_cmd *cmd, u8 status);
+};
+
+int mgmt_send_event(u16 event, struct hci_dev *hdev, unsigned short channel,
+		    void *data, u16 data_len, int flag, struct sock *skip_sk);
+int mgmt_cmd_status(struct sock *sk, u16 index, u16 cmd, u8 status);
+int mgmt_cmd_complete(struct sock *sk, u16 index, u16 cmd, u8 status,
+		      void *rp, size_t rp_len);
+
+struct mgmt_pending_cmd *mgmt_pending_find(unsigned short channel, u16 opcode,
+					   struct hci_dev *hdev);
+struct mgmt_pending_cmd *mgmt_pending_find_data(unsigned short channel,
+						u16 opcode,
+						struct hci_dev *hdev,
+						const void *data);
+void mgmt_pending_foreach(u16 opcode, struct hci_dev *hdev,
+			  void (*cb)(struct mgmt_pending_cmd *cmd, void *data),
+			  void *data);
+struct mgmt_pending_cmd *mgmt_pending_add(struct sock *sk, u16 opcode,
+					  struct hci_dev *hdev,
+					  void *data, u16 len);
+void mgmt_pending_free(struct mgmt_pending_cmd *cmd);
+void mgmt_pending_remove(struct mgmt_pending_cmd *cmd);
diff --git a/net/bluetooth/msft.c b/net/bluetooth/msft.c
new file mode 100644
index 000000000..4b39534a1
--- /dev/null
+++ b/net/bluetooth/msft.c
@@ -0,0 +1,149 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 Google Corporation
+ */
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "msft.h"
+
+#define MSFT_OP_READ_SUPPORTED_FEATURES		0x00
+struct msft_cp_read_supported_features {
+	__u8   sub_opcode;
+} __packed;
+
+struct msft_rp_read_supported_features {
+	__u8   status;
+	__u8   sub_opcode;
+	__le64 features;
+	__u8   evt_prefix_len;
+	__u8   evt_prefix[];
+} __packed;
+
+struct msft_data {
+	__u64 features;
+	__u8  evt_prefix_len;
+	__u8  *evt_prefix;
+};
+
+static bool read_supported_features(struct hci_dev *hdev,
+				    struct msft_data *msft)
+{
+	struct msft_cp_read_supported_features cp;
+	struct msft_rp_read_supported_features *rp;
+	struct sk_buff *skb;
+
+	cp.sub_opcode = MSFT_OP_READ_SUPPORTED_FEATURES;
+
+	skb = __hci_cmd_sync(hdev, hdev->msft_opcode, sizeof(cp), &cp,
+			     HCI_CMD_TIMEOUT);
+	if (IS_ERR(skb)) {
+		bt_dev_err(hdev, "Failed to read MSFT supported features (%ld)",
+			   PTR_ERR(skb));
+		return false;
+	}
+
+	if (skb->len < sizeof(*rp)) {
+		bt_dev_err(hdev, "MSFT supported features length mismatch");
+		goto failed;
+	}
+
+	rp = (struct msft_rp_read_supported_features *)skb->data;
+
+	if (rp->sub_opcode != MSFT_OP_READ_SUPPORTED_FEATURES)
+		goto failed;
+
+	if (rp->evt_prefix_len > 0) {
+		msft->evt_prefix = kmemdup(rp->evt_prefix, rp->evt_prefix_len,
+					   GFP_KERNEL);
+		if (!msft->evt_prefix)
+			goto failed;
+	}
+
+	msft->evt_prefix_len = rp->evt_prefix_len;
+	msft->features = __le64_to_cpu(rp->features);
+
+	kfree_skb(skb);
+	return true;
+
+failed:
+	kfree_skb(skb);
+	return false;
+}
+
+void msft_do_open(struct hci_dev *hdev)
+{
+	struct msft_data *msft;
+
+	if (hdev->msft_opcode == HCI_OP_NOP)
+		return;
+
+	bt_dev_dbg(hdev, "Initialize MSFT extension");
+
+	msft = kzalloc(sizeof(*msft), GFP_KERNEL);
+	if (!msft)
+		return;
+
+	if (!read_supported_features(hdev, msft)) {
+		kfree(msft);
+		return;
+	}
+
+	hdev->msft_data = msft;
+}
+
+void msft_do_close(struct hci_dev *hdev)
+{
+	struct msft_data *msft = hdev->msft_data;
+
+	if (!msft)
+		return;
+
+	bt_dev_dbg(hdev, "Cleanup of MSFT extension");
+
+	hdev->msft_data = NULL;
+
+	kfree(msft->evt_prefix);
+	kfree(msft);
+}
+
+void msft_vendor_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct msft_data *msft = hdev->msft_data;
+	u8 event;
+
+	if (!msft)
+		return;
+
+	/* When the extension has defined an event prefix, check that it
+	 * matches, and otherwise just return.
+	 */
+	if (msft->evt_prefix_len > 0) {
+		if (skb->len < msft->evt_prefix_len)
+			return;
+
+		if (memcmp(skb->data, msft->evt_prefix, msft->evt_prefix_len))
+			return;
+
+		skb_pull(skb, msft->evt_prefix_len);
+	}
+
+	/* Every event starts at least with an event code and the rest of
+	 * the data is variable and depends on the event code.
+	 */
+	if (skb->len < 1)
+		return;
+
+	event = *skb->data;
+	skb_pull(skb, 1);
+
+	bt_dev_dbg(hdev, "MSFT vendor event %u", event);
+}
+
+__u64 msft_get_features(struct hci_dev *hdev)
+{
+	struct msft_data *msft = hdev->msft_data;
+
+	return  msft ? msft->features : 0;
+}
diff --git a/net/bluetooth/msft.h b/net/bluetooth/msft.h
new file mode 100644
index 000000000..e9c478e89
--- /dev/null
+++ b/net/bluetooth/msft.h
@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 Google Corporation
+ */
+
+#define MSFT_FEATURE_MASK_BREDR_RSSI_MONITOR		BIT(0)
+#define MSFT_FEATURE_MASK_LE_CONN_RSSI_MONITOR		BIT(1)
+#define MSFT_FEATURE_MASK_LE_ADV_RSSI_MONITOR		BIT(2)
+#define MSFT_FEATURE_MASK_LE_ADV_MONITOR		BIT(3)
+#define MSFT_FEATURE_MASK_CURVE_VALIDITY		BIT(4)
+#define MSFT_FEATURE_MASK_CONCURRENT_ADV_MONITOR	BIT(5)
+
+#if IS_ENABLED(CONFIG_BT_MSFTEXT)
+
+void msft_do_open(struct hci_dev *hdev);
+void msft_do_close(struct hci_dev *hdev);
+void msft_vendor_evt(struct hci_dev *hdev, struct sk_buff *skb);
+__u64 msft_get_features(struct hci_dev *hdev);
+
+#else
+
+static inline void msft_do_open(struct hci_dev *hdev) {}
+static inline void msft_do_close(struct hci_dev *hdev) {}
+static inline void msft_vendor_evt(struct hci_dev *hdev, struct sk_buff *skb) {}
+static inline __u64 msft_get_features(struct hci_dev *hdev) { return 0; }
+
+#endif
diff --git a/net/bluetooth/rfcomm/Kconfig b/net/bluetooth/rfcomm/Kconfig
new file mode 100644
index 000000000..9b9953ebf
--- /dev/null
+++ b/net/bluetooth/rfcomm/Kconfig
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config BT_RFCOMM
+	tristate "RFCOMM protocol support"
+	depends on BT_BREDR
+	help
+	  RFCOMM provides connection oriented stream transport.  RFCOMM
+	  support is required for Dialup Networking, OBEX and other Bluetooth
+	  applications.
+
+	  Say Y here to compile RFCOMM support into the kernel or say M to
+	  compile it as module (rfcomm).
+
+config BT_RFCOMM_TTY
+	bool "RFCOMM TTY support"
+	depends on BT_RFCOMM
+	depends on TTY
+	help
+	  This option enables TTY emulation support for RFCOMM channels.
+
diff --git a/net/bluetooth/rfcomm/Makefile b/net/bluetooth/rfcomm/Makefile
new file mode 100644
index 000000000..593e5c48c
--- /dev/null
+++ b/net/bluetooth/rfcomm/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the Linux Bluetooth RFCOMM layer.
+#
+
+obj-$(CONFIG_BT_RFCOMM) += rfcomm.o
+
+rfcomm-y			:= core.o sock.o
+rfcomm-$(CONFIG_BT_RFCOMM_TTY)	+= tty.o
diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c
new file mode 100644
index 000000000..8d6fce900
--- /dev/null
+++ b/net/bluetooth/rfcomm/core.c
@@ -0,0 +1,2281 @@
+/*
+   RFCOMM implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
+   Copyright (C) 2002 Marcel Holtmann <marcel@holtmann.org>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/*
+ * Bluetooth RFCOMM core.
+ */
+
+#include <linux/module.h>
+#include <linux/debugfs.h>
+#include <linux/kthread.h>
+#include <asm/unaligned.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/l2cap.h>
+#include <net/bluetooth/rfcomm.h>
+
+#define VERSION "1.11"
+
+static bool disable_cfc;
+static bool l2cap_ertm;
+static int channel_mtu = -1;
+
+static struct task_struct *rfcomm_thread;
+
+static DEFINE_MUTEX(rfcomm_mutex);
+#define rfcomm_lock()	mutex_lock(&rfcomm_mutex)
+#define rfcomm_unlock()	mutex_unlock(&rfcomm_mutex)
+
+
+static LIST_HEAD(session_list);
+
+static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len);
+static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci);
+static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci);
+static int rfcomm_queue_disc(struct rfcomm_dlc *d);
+static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type);
+static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d);
+static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig);
+static int rfcomm_send_test(struct rfcomm_session *s, int cr, u8 *pattern, int len);
+static int rfcomm_send_credits(struct rfcomm_session *s, u8 addr, u8 credits);
+static void rfcomm_make_uih(struct sk_buff *skb, u8 addr);
+
+static void rfcomm_process_connect(struct rfcomm_session *s);
+
+static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src,
+							bdaddr_t *dst,
+							u8 sec_level,
+							int *err);
+static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst);
+static struct rfcomm_session *rfcomm_session_del(struct rfcomm_session *s);
+
+/* ---- RFCOMM frame parsing macros ---- */
+#define __get_dlci(b)     ((b & 0xfc) >> 2)
+#define __get_type(b)     ((b & 0xef))
+
+#define __test_ea(b)      ((b & 0x01))
+#define __test_cr(b)      (!!(b & 0x02))
+#define __test_pf(b)      (!!(b & 0x10))
+
+#define __session_dir(s)  ((s)->initiator ? 0x00 : 0x01)
+
+#define __addr(cr, dlci)       (((dlci & 0x3f) << 2) | (cr << 1) | 0x01)
+#define __ctrl(type, pf)       (((type & 0xef) | (pf << 4)))
+#define __dlci(dir, chn)       (((chn & 0x1f) << 1) | dir)
+#define __srv_channel(dlci)    (dlci >> 1)
+
+#define __len8(len)       (((len) << 1) | 1)
+#define __len16(len)      ((len) << 1)
+
+/* MCC macros */
+#define __mcc_type(cr, type)   (((type << 2) | (cr << 1) | 0x01))
+#define __get_mcc_type(b) ((b & 0xfc) >> 2)
+#define __get_mcc_len(b)  ((b & 0xfe) >> 1)
+
+/* RPN macros */
+#define __rpn_line_settings(data, stop, parity)  ((data & 0x3) | ((stop & 0x1) << 2) | ((parity & 0x7) << 3))
+#define __get_rpn_data_bits(line) ((line) & 0x3)
+#define __get_rpn_stop_bits(line) (((line) >> 2) & 0x1)
+#define __get_rpn_parity(line)    (((line) >> 3) & 0x7)
+
+static DECLARE_WAIT_QUEUE_HEAD(rfcomm_wq);
+
+static void rfcomm_schedule(void)
+{
+	wake_up_all(&rfcomm_wq);
+}
+
+/* ---- RFCOMM FCS computation ---- */
+
+/* reversed, 8-bit, poly=0x07 */
+static unsigned char rfcomm_crc_table[256] = {
+	0x00, 0x91, 0xe3, 0x72, 0x07, 0x96, 0xe4, 0x75,
+	0x0e, 0x9f, 0xed, 0x7c, 0x09, 0x98, 0xea, 0x7b,
+	0x1c, 0x8d, 0xff, 0x6e, 0x1b, 0x8a, 0xf8, 0x69,
+	0x12, 0x83, 0xf1, 0x60, 0x15, 0x84, 0xf6, 0x67,
+
+	0x38, 0xa9, 0xdb, 0x4a, 0x3f, 0xae, 0xdc, 0x4d,
+	0x36, 0xa7, 0xd5, 0x44, 0x31, 0xa0, 0xd2, 0x43,
+	0x24, 0xb5, 0xc7, 0x56, 0x23, 0xb2, 0xc0, 0x51,
+	0x2a, 0xbb, 0xc9, 0x58, 0x2d, 0xbc, 0xce, 0x5f,
+
+	0x70, 0xe1, 0x93, 0x02, 0x77, 0xe6, 0x94, 0x05,
+	0x7e, 0xef, 0x9d, 0x0c, 0x79, 0xe8, 0x9a, 0x0b,
+	0x6c, 0xfd, 0x8f, 0x1e, 0x6b, 0xfa, 0x88, 0x19,
+	0x62, 0xf3, 0x81, 0x10, 0x65, 0xf4, 0x86, 0x17,
+
+	0x48, 0xd9, 0xab, 0x3a, 0x4f, 0xde, 0xac, 0x3d,
+	0x46, 0xd7, 0xa5, 0x34, 0x41, 0xd0, 0xa2, 0x33,
+	0x54, 0xc5, 0xb7, 0x26, 0x53, 0xc2, 0xb0, 0x21,
+	0x5a, 0xcb, 0xb9, 0x28, 0x5d, 0xcc, 0xbe, 0x2f,
+
+	0xe0, 0x71, 0x03, 0x92, 0xe7, 0x76, 0x04, 0x95,
+	0xee, 0x7f, 0x0d, 0x9c, 0xe9, 0x78, 0x0a, 0x9b,
+	0xfc, 0x6d, 0x1f, 0x8e, 0xfb, 0x6a, 0x18, 0x89,
+	0xf2, 0x63, 0x11, 0x80, 0xf5, 0x64, 0x16, 0x87,
+
+	0xd8, 0x49, 0x3b, 0xaa, 0xdf, 0x4e, 0x3c, 0xad,
+	0xd6, 0x47, 0x35, 0xa4, 0xd1, 0x40, 0x32, 0xa3,
+	0xc4, 0x55, 0x27, 0xb6, 0xc3, 0x52, 0x20, 0xb1,
+	0xca, 0x5b, 0x29, 0xb8, 0xcd, 0x5c, 0x2e, 0xbf,
+
+	0x90, 0x01, 0x73, 0xe2, 0x97, 0x06, 0x74, 0xe5,
+	0x9e, 0x0f, 0x7d, 0xec, 0x99, 0x08, 0x7a, 0xeb,
+	0x8c, 0x1d, 0x6f, 0xfe, 0x8b, 0x1a, 0x68, 0xf9,
+	0x82, 0x13, 0x61, 0xf0, 0x85, 0x14, 0x66, 0xf7,
+
+	0xa8, 0x39, 0x4b, 0xda, 0xaf, 0x3e, 0x4c, 0xdd,
+	0xa6, 0x37, 0x45, 0xd4, 0xa1, 0x30, 0x42, 0xd3,
+	0xb4, 0x25, 0x57, 0xc6, 0xb3, 0x22, 0x50, 0xc1,
+	0xba, 0x2b, 0x59, 0xc8, 0xbd, 0x2c, 0x5e, 0xcf
+};
+
+/* CRC on 2 bytes */
+#define __crc(data) (rfcomm_crc_table[rfcomm_crc_table[0xff ^ data[0]] ^ data[1]])
+
+/* FCS on 2 bytes */
+static inline u8 __fcs(u8 *data)
+{
+	return 0xff - __crc(data);
+}
+
+/* FCS on 3 bytes */
+static inline u8 __fcs2(u8 *data)
+{
+	return 0xff - rfcomm_crc_table[__crc(data) ^ data[2]];
+}
+
+/* Check FCS */
+static inline int __check_fcs(u8 *data, int type, u8 fcs)
+{
+	u8 f = __crc(data);
+
+	if (type != RFCOMM_UIH)
+		f = rfcomm_crc_table[f ^ data[2]];
+
+	return rfcomm_crc_table[f ^ fcs] != 0xcf;
+}
+
+/* ---- L2CAP callbacks ---- */
+static void rfcomm_l2state_change(struct sock *sk)
+{
+	BT_DBG("%p state %d", sk, sk->sk_state);
+	rfcomm_schedule();
+}
+
+static void rfcomm_l2data_ready(struct sock *sk)
+{
+	BT_DBG("%p", sk);
+	rfcomm_schedule();
+}
+
+static int rfcomm_l2sock_create(struct socket **sock)
+{
+	int err;
+
+	BT_DBG("");
+
+	err = sock_create_kern(&init_net, PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP, sock);
+	if (!err) {
+		struct sock *sk = (*sock)->sk;
+		sk->sk_data_ready   = rfcomm_l2data_ready;
+		sk->sk_state_change = rfcomm_l2state_change;
+	}
+	return err;
+}
+
+static int rfcomm_check_security(struct rfcomm_dlc *d)
+{
+	struct sock *sk = d->session->sock->sk;
+	struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn;
+
+	__u8 auth_type;
+
+	switch (d->sec_level) {
+	case BT_SECURITY_HIGH:
+	case BT_SECURITY_FIPS:
+		auth_type = HCI_AT_GENERAL_BONDING_MITM;
+		break;
+	case BT_SECURITY_MEDIUM:
+		auth_type = HCI_AT_GENERAL_BONDING;
+		break;
+	default:
+		auth_type = HCI_AT_NO_BONDING;
+		break;
+	}
+
+	return hci_conn_security(conn->hcon, d->sec_level, auth_type,
+				 d->out);
+}
+
+static void rfcomm_session_timeout(struct timer_list *t)
+{
+	struct rfcomm_session *s = from_timer(s, t, timer);
+
+	BT_DBG("session %p state %ld", s, s->state);
+
+	set_bit(RFCOMM_TIMED_OUT, &s->flags);
+	rfcomm_schedule();
+}
+
+static void rfcomm_session_set_timer(struct rfcomm_session *s, long timeout)
+{
+	BT_DBG("session %p state %ld timeout %ld", s, s->state, timeout);
+
+	mod_timer(&s->timer, jiffies + timeout);
+}
+
+static void rfcomm_session_clear_timer(struct rfcomm_session *s)
+{
+	BT_DBG("session %p state %ld", s, s->state);
+
+	del_timer_sync(&s->timer);
+}
+
+/* ---- RFCOMM DLCs ---- */
+static void rfcomm_dlc_timeout(struct timer_list *t)
+{
+	struct rfcomm_dlc *d = from_timer(d, t, timer);
+
+	BT_DBG("dlc %p state %ld", d, d->state);
+
+	set_bit(RFCOMM_TIMED_OUT, &d->flags);
+	rfcomm_dlc_put(d);
+	rfcomm_schedule();
+}
+
+static void rfcomm_dlc_set_timer(struct rfcomm_dlc *d, long timeout)
+{
+	BT_DBG("dlc %p state %ld timeout %ld", d, d->state, timeout);
+
+	if (!mod_timer(&d->timer, jiffies + timeout))
+		rfcomm_dlc_hold(d);
+}
+
+static void rfcomm_dlc_clear_timer(struct rfcomm_dlc *d)
+{
+	BT_DBG("dlc %p state %ld", d, d->state);
+
+	if (del_timer(&d->timer))
+		rfcomm_dlc_put(d);
+}
+
+static void rfcomm_dlc_clear_state(struct rfcomm_dlc *d)
+{
+	BT_DBG("%p", d);
+
+	d->state      = BT_OPEN;
+	d->flags      = 0;
+	d->mscex      = 0;
+	d->sec_level  = BT_SECURITY_LOW;
+	d->mtu        = RFCOMM_DEFAULT_MTU;
+	d->v24_sig    = RFCOMM_V24_RTC | RFCOMM_V24_RTR | RFCOMM_V24_DV;
+
+	d->cfc        = RFCOMM_CFC_DISABLED;
+	d->rx_credits = RFCOMM_DEFAULT_CREDITS;
+}
+
+struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio)
+{
+	struct rfcomm_dlc *d = kzalloc(sizeof(*d), prio);
+
+	if (!d)
+		return NULL;
+
+	timer_setup(&d->timer, rfcomm_dlc_timeout, 0);
+
+	skb_queue_head_init(&d->tx_queue);
+	mutex_init(&d->lock);
+	refcount_set(&d->refcnt, 1);
+
+	rfcomm_dlc_clear_state(d);
+
+	BT_DBG("%p", d);
+
+	return d;
+}
+
+void rfcomm_dlc_free(struct rfcomm_dlc *d)
+{
+	BT_DBG("%p", d);
+
+	skb_queue_purge(&d->tx_queue);
+	kfree(d);
+}
+
+static void rfcomm_dlc_link(struct rfcomm_session *s, struct rfcomm_dlc *d)
+{
+	BT_DBG("dlc %p session %p", d, s);
+
+	rfcomm_session_clear_timer(s);
+	rfcomm_dlc_hold(d);
+	list_add(&d->list, &s->dlcs);
+	d->session = s;
+}
+
+static void rfcomm_dlc_unlink(struct rfcomm_dlc *d)
+{
+	struct rfcomm_session *s = d->session;
+
+	BT_DBG("dlc %p refcnt %d session %p", d, refcount_read(&d->refcnt), s);
+
+	list_del(&d->list);
+	d->session = NULL;
+	rfcomm_dlc_put(d);
+
+	if (list_empty(&s->dlcs))
+		rfcomm_session_set_timer(s, RFCOMM_IDLE_TIMEOUT);
+}
+
+static struct rfcomm_dlc *rfcomm_dlc_get(struct rfcomm_session *s, u8 dlci)
+{
+	struct rfcomm_dlc *d;
+
+	list_for_each_entry(d, &s->dlcs, list)
+		if (d->dlci == dlci)
+			return d;
+
+	return NULL;
+}
+
+static int rfcomm_check_channel(u8 channel)
+{
+	return channel < 1 || channel > 30;
+}
+
+static int __rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel)
+{
+	struct rfcomm_session *s;
+	int err = 0;
+	u8 dlci;
+
+	BT_DBG("dlc %p state %ld %pMR -> %pMR channel %d",
+	       d, d->state, src, dst, channel);
+
+	if (rfcomm_check_channel(channel))
+		return -EINVAL;
+
+	if (d->state != BT_OPEN && d->state != BT_CLOSED)
+		return 0;
+
+	s = rfcomm_session_get(src, dst);
+	if (!s) {
+		s = rfcomm_session_create(src, dst, d->sec_level, &err);
+		if (!s)
+			return err;
+	}
+
+	dlci = __dlci(__session_dir(s), channel);
+
+	/* Check if DLCI already exists */
+	if (rfcomm_dlc_get(s, dlci))
+		return -EBUSY;
+
+	rfcomm_dlc_clear_state(d);
+
+	d->dlci     = dlci;
+	d->addr     = __addr(s->initiator, dlci);
+	d->priority = 7;
+
+	d->state = BT_CONFIG;
+	rfcomm_dlc_link(s, d);
+
+	d->out = 1;
+
+	d->mtu = s->mtu;
+	d->cfc = (s->cfc == RFCOMM_CFC_UNKNOWN) ? 0 : s->cfc;
+
+	if (s->state == BT_CONNECTED) {
+		if (rfcomm_check_security(d))
+			rfcomm_send_pn(s, 1, d);
+		else
+			set_bit(RFCOMM_AUTH_PENDING, &d->flags);
+	}
+
+	rfcomm_dlc_set_timer(d, RFCOMM_CONN_TIMEOUT);
+
+	return 0;
+}
+
+int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel)
+{
+	int r;
+
+	rfcomm_lock();
+
+	r = __rfcomm_dlc_open(d, src, dst, channel);
+
+	rfcomm_unlock();
+	return r;
+}
+
+static void __rfcomm_dlc_disconn(struct rfcomm_dlc *d)
+{
+	struct rfcomm_session *s = d->session;
+
+	d->state = BT_DISCONN;
+	if (skb_queue_empty(&d->tx_queue)) {
+		rfcomm_send_disc(s, d->dlci);
+		rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT);
+	} else {
+		rfcomm_queue_disc(d);
+		rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT * 2);
+	}
+}
+
+static int __rfcomm_dlc_close(struct rfcomm_dlc *d, int err)
+{
+	struct rfcomm_session *s = d->session;
+	if (!s)
+		return 0;
+
+	BT_DBG("dlc %p state %ld dlci %d err %d session %p",
+			d, d->state, d->dlci, err, s);
+
+	switch (d->state) {
+	case BT_CONNECT:
+	case BT_CONFIG:
+	case BT_OPEN:
+	case BT_CONNECT2:
+		if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) {
+			set_bit(RFCOMM_AUTH_REJECT, &d->flags);
+			rfcomm_schedule();
+			return 0;
+		}
+	}
+
+	switch (d->state) {
+	case BT_CONNECT:
+	case BT_CONNECTED:
+		__rfcomm_dlc_disconn(d);
+		break;
+
+	case BT_CONFIG:
+		if (s->state != BT_BOUND) {
+			__rfcomm_dlc_disconn(d);
+			break;
+		}
+		/* if closing a dlc in a session that hasn't been started,
+		 * just close and unlink the dlc
+		 */
+		fallthrough;
+
+	default:
+		rfcomm_dlc_clear_timer(d);
+
+		rfcomm_dlc_lock(d);
+		d->state = BT_CLOSED;
+		d->state_change(d, err);
+		rfcomm_dlc_unlock(d);
+
+		skb_queue_purge(&d->tx_queue);
+		rfcomm_dlc_unlink(d);
+	}
+
+	return 0;
+}
+
+int rfcomm_dlc_close(struct rfcomm_dlc *d, int err)
+{
+	int r = 0;
+	struct rfcomm_dlc *d_list;
+	struct rfcomm_session *s, *s_list;
+
+	BT_DBG("dlc %p state %ld dlci %d err %d", d, d->state, d->dlci, err);
+
+	rfcomm_lock();
+
+	s = d->session;
+	if (!s)
+		goto no_session;
+
+	/* after waiting on the mutex check the session still exists
+	 * then check the dlc still exists
+	 */
+	list_for_each_entry(s_list, &session_list, list) {
+		if (s_list == s) {
+			list_for_each_entry(d_list, &s->dlcs, list) {
+				if (d_list == d) {
+					r = __rfcomm_dlc_close(d, err);
+					break;
+				}
+			}
+			break;
+		}
+	}
+
+no_session:
+	rfcomm_unlock();
+	return r;
+}
+
+struct rfcomm_dlc *rfcomm_dlc_exists(bdaddr_t *src, bdaddr_t *dst, u8 channel)
+{
+	struct rfcomm_session *s;
+	struct rfcomm_dlc *dlc = NULL;
+	u8 dlci;
+
+	if (rfcomm_check_channel(channel))
+		return ERR_PTR(-EINVAL);
+
+	rfcomm_lock();
+	s = rfcomm_session_get(src, dst);
+	if (s) {
+		dlci = __dlci(__session_dir(s), channel);
+		dlc = rfcomm_dlc_get(s, dlci);
+	}
+	rfcomm_unlock();
+	return dlc;
+}
+
+static int rfcomm_dlc_send_frag(struct rfcomm_dlc *d, struct sk_buff *frag)
+{
+	int len = frag->len;
+
+	BT_DBG("dlc %p mtu %d len %d", d, d->mtu, len);
+
+	if (len > d->mtu)
+		return -EINVAL;
+
+	rfcomm_make_uih(frag, d->addr);
+	__skb_queue_tail(&d->tx_queue, frag);
+
+	return len;
+}
+
+int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb)
+{
+	unsigned long flags;
+	struct sk_buff *frag, *next;
+	int len;
+
+	if (d->state != BT_CONNECTED)
+		return -ENOTCONN;
+
+	frag = skb_shinfo(skb)->frag_list;
+	skb_shinfo(skb)->frag_list = NULL;
+
+	/* Queue all fragments atomically. */
+	spin_lock_irqsave(&d->tx_queue.lock, flags);
+
+	len = rfcomm_dlc_send_frag(d, skb);
+	if (len < 0 || !frag)
+		goto unlock;
+
+	for (; frag; frag = next) {
+		int ret;
+
+		next = frag->next;
+
+		ret = rfcomm_dlc_send_frag(d, frag);
+		if (ret < 0) {
+			dev_kfree_skb_irq(frag);
+			goto unlock;
+		}
+
+		len += ret;
+	}
+
+unlock:
+	spin_unlock_irqrestore(&d->tx_queue.lock, flags);
+
+	if (len > 0 && !test_bit(RFCOMM_TX_THROTTLED, &d->flags))
+		rfcomm_schedule();
+	return len;
+}
+
+void rfcomm_dlc_send_noerror(struct rfcomm_dlc *d, struct sk_buff *skb)
+{
+	int len = skb->len;
+
+	BT_DBG("dlc %p mtu %d len %d", d, d->mtu, len);
+
+	rfcomm_make_uih(skb, d->addr);
+	skb_queue_tail(&d->tx_queue, skb);
+
+	if (d->state == BT_CONNECTED &&
+	    !test_bit(RFCOMM_TX_THROTTLED, &d->flags))
+		rfcomm_schedule();
+}
+
+void __rfcomm_dlc_throttle(struct rfcomm_dlc *d)
+{
+	BT_DBG("dlc %p state %ld", d, d->state);
+
+	if (!d->cfc) {
+		d->v24_sig |= RFCOMM_V24_FC;
+		set_bit(RFCOMM_MSC_PENDING, &d->flags);
+	}
+	rfcomm_schedule();
+}
+
+void __rfcomm_dlc_unthrottle(struct rfcomm_dlc *d)
+{
+	BT_DBG("dlc %p state %ld", d, d->state);
+
+	if (!d->cfc) {
+		d->v24_sig &= ~RFCOMM_V24_FC;
+		set_bit(RFCOMM_MSC_PENDING, &d->flags);
+	}
+	rfcomm_schedule();
+}
+
+/*
+   Set/get modem status functions use _local_ status i.e. what we report
+   to the other side.
+   Remote status is provided by dlc->modem_status() callback.
+ */
+int rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig)
+{
+	BT_DBG("dlc %p state %ld v24_sig 0x%x",
+			d, d->state, v24_sig);
+
+	if (test_bit(RFCOMM_RX_THROTTLED, &d->flags))
+		v24_sig |= RFCOMM_V24_FC;
+	else
+		v24_sig &= ~RFCOMM_V24_FC;
+
+	d->v24_sig = v24_sig;
+
+	if (!test_and_set_bit(RFCOMM_MSC_PENDING, &d->flags))
+		rfcomm_schedule();
+
+	return 0;
+}
+
+int rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig)
+{
+	BT_DBG("dlc %p state %ld v24_sig 0x%x",
+			d, d->state, d->v24_sig);
+
+	*v24_sig = d->v24_sig;
+	return 0;
+}
+
+/* ---- RFCOMM sessions ---- */
+static struct rfcomm_session *rfcomm_session_add(struct socket *sock, int state)
+{
+	struct rfcomm_session *s = kzalloc(sizeof(*s), GFP_KERNEL);
+
+	if (!s)
+		return NULL;
+
+	BT_DBG("session %p sock %p", s, sock);
+
+	timer_setup(&s->timer, rfcomm_session_timeout, 0);
+
+	INIT_LIST_HEAD(&s->dlcs);
+	s->state = state;
+	s->sock  = sock;
+
+	s->mtu = RFCOMM_DEFAULT_MTU;
+	s->cfc = disable_cfc ? RFCOMM_CFC_DISABLED : RFCOMM_CFC_UNKNOWN;
+
+	/* Do not increment module usage count for listening sessions.
+	 * Otherwise we won't be able to unload the module. */
+	if (state != BT_LISTEN)
+		if (!try_module_get(THIS_MODULE)) {
+			kfree(s);
+			return NULL;
+		}
+
+	list_add(&s->list, &session_list);
+
+	return s;
+}
+
+static struct rfcomm_session *rfcomm_session_del(struct rfcomm_session *s)
+{
+	int state = s->state;
+
+	BT_DBG("session %p state %ld", s, s->state);
+
+	list_del(&s->list);
+
+	rfcomm_session_clear_timer(s);
+	sock_release(s->sock);
+	kfree(s);
+
+	if (state != BT_LISTEN)
+		module_put(THIS_MODULE);
+
+	return NULL;
+}
+
+static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst)
+{
+	struct rfcomm_session *s, *n;
+	struct l2cap_chan *chan;
+	list_for_each_entry_safe(s, n, &session_list, list) {
+		chan = l2cap_pi(s->sock->sk)->chan;
+
+		if ((!bacmp(src, BDADDR_ANY) || !bacmp(&chan->src, src)) &&
+		    !bacmp(&chan->dst, dst))
+			return s;
+	}
+	return NULL;
+}
+
+static struct rfcomm_session *rfcomm_session_close(struct rfcomm_session *s,
+						   int err)
+{
+	struct rfcomm_dlc *d, *n;
+
+	s->state = BT_CLOSED;
+
+	BT_DBG("session %p state %ld err %d", s, s->state, err);
+
+	/* Close all dlcs */
+	list_for_each_entry_safe(d, n, &s->dlcs, list) {
+		d->state = BT_CLOSED;
+		__rfcomm_dlc_close(d, err);
+	}
+
+	rfcomm_session_clear_timer(s);
+	return rfcomm_session_del(s);
+}
+
+static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src,
+							bdaddr_t *dst,
+							u8 sec_level,
+							int *err)
+{
+	struct rfcomm_session *s = NULL;
+	struct sockaddr_l2 addr;
+	struct socket *sock;
+	struct sock *sk;
+
+	BT_DBG("%pMR -> %pMR", src, dst);
+
+	*err = rfcomm_l2sock_create(&sock);
+	if (*err < 0)
+		return NULL;
+
+	bacpy(&addr.l2_bdaddr, src);
+	addr.l2_family = AF_BLUETOOTH;
+	addr.l2_psm    = 0;
+	addr.l2_cid    = 0;
+	addr.l2_bdaddr_type = BDADDR_BREDR;
+	*err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr));
+	if (*err < 0)
+		goto failed;
+
+	/* Set L2CAP options */
+	sk = sock->sk;
+	lock_sock(sk);
+	/* Set MTU to 0 so L2CAP can auto select the MTU */
+	l2cap_pi(sk)->chan->imtu = 0;
+	l2cap_pi(sk)->chan->sec_level = sec_level;
+	if (l2cap_ertm)
+		l2cap_pi(sk)->chan->mode = L2CAP_MODE_ERTM;
+	release_sock(sk);
+
+	s = rfcomm_session_add(sock, BT_BOUND);
+	if (!s) {
+		*err = -ENOMEM;
+		goto failed;
+	}
+
+	s->initiator = 1;
+
+	bacpy(&addr.l2_bdaddr, dst);
+	addr.l2_family = AF_BLUETOOTH;
+	addr.l2_psm    = cpu_to_le16(L2CAP_PSM_RFCOMM);
+	addr.l2_cid    = 0;
+	addr.l2_bdaddr_type = BDADDR_BREDR;
+	*err = kernel_connect(sock, (struct sockaddr *) &addr, sizeof(addr), O_NONBLOCK);
+	if (*err == 0 || *err == -EINPROGRESS)
+		return s;
+
+	return rfcomm_session_del(s);
+
+failed:
+	sock_release(sock);
+	return NULL;
+}
+
+void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, bdaddr_t *dst)
+{
+	struct l2cap_chan *chan = l2cap_pi(s->sock->sk)->chan;
+	if (src)
+		bacpy(src, &chan->src);
+	if (dst)
+		bacpy(dst, &chan->dst);
+}
+
+/* ---- RFCOMM frame sending ---- */
+static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len)
+{
+	struct kvec iv = { data, len };
+	struct msghdr msg;
+
+	BT_DBG("session %p len %d", s, len);
+
+	memset(&msg, 0, sizeof(msg));
+
+	return kernel_sendmsg(s->sock, &msg, &iv, 1, len);
+}
+
+static int rfcomm_send_cmd(struct rfcomm_session *s, struct rfcomm_cmd *cmd)
+{
+	BT_DBG("%p cmd %u", s, cmd->ctrl);
+
+	return rfcomm_send_frame(s, (void *) cmd, sizeof(*cmd));
+}
+
+static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci)
+{
+	struct rfcomm_cmd cmd;
+
+	BT_DBG("%p dlci %d", s, dlci);
+
+	cmd.addr = __addr(s->initiator, dlci);
+	cmd.ctrl = __ctrl(RFCOMM_SABM, 1);
+	cmd.len  = __len8(0);
+	cmd.fcs  = __fcs2((u8 *) &cmd);
+
+	return rfcomm_send_cmd(s, &cmd);
+}
+
+static int rfcomm_send_ua(struct rfcomm_session *s, u8 dlci)
+{
+	struct rfcomm_cmd cmd;
+
+	BT_DBG("%p dlci %d", s, dlci);
+
+	cmd.addr = __addr(!s->initiator, dlci);
+	cmd.ctrl = __ctrl(RFCOMM_UA, 1);
+	cmd.len  = __len8(0);
+	cmd.fcs  = __fcs2((u8 *) &cmd);
+
+	return rfcomm_send_cmd(s, &cmd);
+}
+
+static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci)
+{
+	struct rfcomm_cmd cmd;
+
+	BT_DBG("%p dlci %d", s, dlci);
+
+	cmd.addr = __addr(s->initiator, dlci);
+	cmd.ctrl = __ctrl(RFCOMM_DISC, 1);
+	cmd.len  = __len8(0);
+	cmd.fcs  = __fcs2((u8 *) &cmd);
+
+	return rfcomm_send_cmd(s, &cmd);
+}
+
+static int rfcomm_queue_disc(struct rfcomm_dlc *d)
+{
+	struct rfcomm_cmd *cmd;
+	struct sk_buff *skb;
+
+	BT_DBG("dlc %p dlci %d", d, d->dlci);
+
+	skb = alloc_skb(sizeof(*cmd), GFP_KERNEL);
+	if (!skb)
+		return -ENOMEM;
+
+	cmd = __skb_put(skb, sizeof(*cmd));
+	cmd->addr = d->addr;
+	cmd->ctrl = __ctrl(RFCOMM_DISC, 1);
+	cmd->len  = __len8(0);
+	cmd->fcs  = __fcs2((u8 *) cmd);
+
+	skb_queue_tail(&d->tx_queue, skb);
+	rfcomm_schedule();
+	return 0;
+}
+
+static int rfcomm_send_dm(struct rfcomm_session *s, u8 dlci)
+{
+	struct rfcomm_cmd cmd;
+
+	BT_DBG("%p dlci %d", s, dlci);
+
+	cmd.addr = __addr(!s->initiator, dlci);
+	cmd.ctrl = __ctrl(RFCOMM_DM, 1);
+	cmd.len  = __len8(0);
+	cmd.fcs  = __fcs2((u8 *) &cmd);
+
+	return rfcomm_send_cmd(s, &cmd);
+}
+
+static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type)
+{
+	struct rfcomm_hdr *hdr;
+	struct rfcomm_mcc *mcc;
+	u8 buf[16], *ptr = buf;
+
+	BT_DBG("%p cr %d type %d", s, cr, type);
+
+	hdr = (void *) ptr; ptr += sizeof(*hdr);
+	hdr->addr = __addr(s->initiator, 0);
+	hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
+	hdr->len  = __len8(sizeof(*mcc) + 1);
+
+	mcc = (void *) ptr; ptr += sizeof(*mcc);
+	mcc->type = __mcc_type(0, RFCOMM_NSC);
+	mcc->len  = __len8(1);
+
+	/* Type that we didn't like */
+	*ptr = __mcc_type(cr, type); ptr++;
+
+	*ptr = __fcs(buf); ptr++;
+
+	return rfcomm_send_frame(s, buf, ptr - buf);
+}
+
+static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d)
+{
+	struct rfcomm_hdr *hdr;
+	struct rfcomm_mcc *mcc;
+	struct rfcomm_pn  *pn;
+	u8 buf[16], *ptr = buf;
+
+	BT_DBG("%p cr %d dlci %d mtu %d", s, cr, d->dlci, d->mtu);
+
+	hdr = (void *) ptr; ptr += sizeof(*hdr);
+	hdr->addr = __addr(s->initiator, 0);
+	hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
+	hdr->len  = __len8(sizeof(*mcc) + sizeof(*pn));
+
+	mcc = (void *) ptr; ptr += sizeof(*mcc);
+	mcc->type = __mcc_type(cr, RFCOMM_PN);
+	mcc->len  = __len8(sizeof(*pn));
+
+	pn = (void *) ptr; ptr += sizeof(*pn);
+	pn->dlci        = d->dlci;
+	pn->priority    = d->priority;
+	pn->ack_timer   = 0;
+	pn->max_retrans = 0;
+
+	if (s->cfc) {
+		pn->flow_ctrl = cr ? 0xf0 : 0xe0;
+		pn->credits = RFCOMM_DEFAULT_CREDITS;
+	} else {
+		pn->flow_ctrl = 0;
+		pn->credits   = 0;
+	}
+
+	if (cr && channel_mtu >= 0)
+		pn->mtu = cpu_to_le16(channel_mtu);
+	else
+		pn->mtu = cpu_to_le16(d->mtu);
+
+	*ptr = __fcs(buf); ptr++;
+
+	return rfcomm_send_frame(s, buf, ptr - buf);
+}
+
+int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci,
+			u8 bit_rate, u8 data_bits, u8 stop_bits,
+			u8 parity, u8 flow_ctrl_settings,
+			u8 xon_char, u8 xoff_char, u16 param_mask)
+{
+	struct rfcomm_hdr *hdr;
+	struct rfcomm_mcc *mcc;
+	struct rfcomm_rpn *rpn;
+	u8 buf[16], *ptr = buf;
+
+	BT_DBG("%p cr %d dlci %d bit_r 0x%x data_b 0x%x stop_b 0x%x parity 0x%x"
+			" flwc_s 0x%x xon_c 0x%x xoff_c 0x%x p_mask 0x%x",
+		s, cr, dlci, bit_rate, data_bits, stop_bits, parity,
+		flow_ctrl_settings, xon_char, xoff_char, param_mask);
+
+	hdr = (void *) ptr; ptr += sizeof(*hdr);
+	hdr->addr = __addr(s->initiator, 0);
+	hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
+	hdr->len  = __len8(sizeof(*mcc) + sizeof(*rpn));
+
+	mcc = (void *) ptr; ptr += sizeof(*mcc);
+	mcc->type = __mcc_type(cr, RFCOMM_RPN);
+	mcc->len  = __len8(sizeof(*rpn));
+
+	rpn = (void *) ptr; ptr += sizeof(*rpn);
+	rpn->dlci          = __addr(1, dlci);
+	rpn->bit_rate      = bit_rate;
+	rpn->line_settings = __rpn_line_settings(data_bits, stop_bits, parity);
+	rpn->flow_ctrl     = flow_ctrl_settings;
+	rpn->xon_char      = xon_char;
+	rpn->xoff_char     = xoff_char;
+	rpn->param_mask    = cpu_to_le16(param_mask);
+
+	*ptr = __fcs(buf); ptr++;
+
+	return rfcomm_send_frame(s, buf, ptr - buf);
+}
+
+static int rfcomm_send_rls(struct rfcomm_session *s, int cr, u8 dlci, u8 status)
+{
+	struct rfcomm_hdr *hdr;
+	struct rfcomm_mcc *mcc;
+	struct rfcomm_rls *rls;
+	u8 buf[16], *ptr = buf;
+
+	BT_DBG("%p cr %d status 0x%x", s, cr, status);
+
+	hdr = (void *) ptr; ptr += sizeof(*hdr);
+	hdr->addr = __addr(s->initiator, 0);
+	hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
+	hdr->len  = __len8(sizeof(*mcc) + sizeof(*rls));
+
+	mcc = (void *) ptr; ptr += sizeof(*mcc);
+	mcc->type = __mcc_type(cr, RFCOMM_RLS);
+	mcc->len  = __len8(sizeof(*rls));
+
+	rls = (void *) ptr; ptr += sizeof(*rls);
+	rls->dlci   = __addr(1, dlci);
+	rls->status = status;
+
+	*ptr = __fcs(buf); ptr++;
+
+	return rfcomm_send_frame(s, buf, ptr - buf);
+}
+
+static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig)
+{
+	struct rfcomm_hdr *hdr;
+	struct rfcomm_mcc *mcc;
+	struct rfcomm_msc *msc;
+	u8 buf[16], *ptr = buf;
+
+	BT_DBG("%p cr %d v24 0x%x", s, cr, v24_sig);
+
+	hdr = (void *) ptr; ptr += sizeof(*hdr);
+	hdr->addr = __addr(s->initiator, 0);
+	hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
+	hdr->len  = __len8(sizeof(*mcc) + sizeof(*msc));
+
+	mcc = (void *) ptr; ptr += sizeof(*mcc);
+	mcc->type = __mcc_type(cr, RFCOMM_MSC);
+	mcc->len  = __len8(sizeof(*msc));
+
+	msc = (void *) ptr; ptr += sizeof(*msc);
+	msc->dlci    = __addr(1, dlci);
+	msc->v24_sig = v24_sig | 0x01;
+
+	*ptr = __fcs(buf); ptr++;
+
+	return rfcomm_send_frame(s, buf, ptr - buf);
+}
+
+static int rfcomm_send_fcoff(struct rfcomm_session *s, int cr)
+{
+	struct rfcomm_hdr *hdr;
+	struct rfcomm_mcc *mcc;
+	u8 buf[16], *ptr = buf;
+
+	BT_DBG("%p cr %d", s, cr);
+
+	hdr = (void *) ptr; ptr += sizeof(*hdr);
+	hdr->addr = __addr(s->initiator, 0);
+	hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
+	hdr->len  = __len8(sizeof(*mcc));
+
+	mcc = (void *) ptr; ptr += sizeof(*mcc);
+	mcc->type = __mcc_type(cr, RFCOMM_FCOFF);
+	mcc->len  = __len8(0);
+
+	*ptr = __fcs(buf); ptr++;
+
+	return rfcomm_send_frame(s, buf, ptr - buf);
+}
+
+static int rfcomm_send_fcon(struct rfcomm_session *s, int cr)
+{
+	struct rfcomm_hdr *hdr;
+	struct rfcomm_mcc *mcc;
+	u8 buf[16], *ptr = buf;
+
+	BT_DBG("%p cr %d", s, cr);
+
+	hdr = (void *) ptr; ptr += sizeof(*hdr);
+	hdr->addr = __addr(s->initiator, 0);
+	hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
+	hdr->len  = __len8(sizeof(*mcc));
+
+	mcc = (void *) ptr; ptr += sizeof(*mcc);
+	mcc->type = __mcc_type(cr, RFCOMM_FCON);
+	mcc->len  = __len8(0);
+
+	*ptr = __fcs(buf); ptr++;
+
+	return rfcomm_send_frame(s, buf, ptr - buf);
+}
+
+static int rfcomm_send_test(struct rfcomm_session *s, int cr, u8 *pattern, int len)
+{
+	struct socket *sock = s->sock;
+	struct kvec iv[3];
+	struct msghdr msg;
+	unsigned char hdr[5], crc[1];
+
+	if (len > 125)
+		return -EINVAL;
+
+	BT_DBG("%p cr %d", s, cr);
+
+	hdr[0] = __addr(s->initiator, 0);
+	hdr[1] = __ctrl(RFCOMM_UIH, 0);
+	hdr[2] = 0x01 | ((len + 2) << 1);
+	hdr[3] = 0x01 | ((cr & 0x01) << 1) | (RFCOMM_TEST << 2);
+	hdr[4] = 0x01 | (len << 1);
+
+	crc[0] = __fcs(hdr);
+
+	iv[0].iov_base = hdr;
+	iv[0].iov_len  = 5;
+	iv[1].iov_base = pattern;
+	iv[1].iov_len  = len;
+	iv[2].iov_base = crc;
+	iv[2].iov_len  = 1;
+
+	memset(&msg, 0, sizeof(msg));
+
+	return kernel_sendmsg(sock, &msg, iv, 3, 6 + len);
+}
+
+static int rfcomm_send_credits(struct rfcomm_session *s, u8 addr, u8 credits)
+{
+	struct rfcomm_hdr *hdr;
+	u8 buf[16], *ptr = buf;
+
+	BT_DBG("%p addr %d credits %d", s, addr, credits);
+
+	hdr = (void *) ptr; ptr += sizeof(*hdr);
+	hdr->addr = addr;
+	hdr->ctrl = __ctrl(RFCOMM_UIH, 1);
+	hdr->len  = __len8(0);
+
+	*ptr = credits; ptr++;
+
+	*ptr = __fcs(buf); ptr++;
+
+	return rfcomm_send_frame(s, buf, ptr - buf);
+}
+
+static void rfcomm_make_uih(struct sk_buff *skb, u8 addr)
+{
+	struct rfcomm_hdr *hdr;
+	int len = skb->len;
+	u8 *crc;
+
+	if (len > 127) {
+		hdr = skb_push(skb, 4);
+		put_unaligned(cpu_to_le16(__len16(len)), (__le16 *) &hdr->len);
+	} else {
+		hdr = skb_push(skb, 3);
+		hdr->len = __len8(len);
+	}
+	hdr->addr = addr;
+	hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
+
+	crc = skb_put(skb, 1);
+	*crc = __fcs((void *) hdr);
+}
+
+/* ---- RFCOMM frame reception ---- */
+static struct rfcomm_session *rfcomm_recv_ua(struct rfcomm_session *s, u8 dlci)
+{
+	BT_DBG("session %p state %ld dlci %d", s, s->state, dlci);
+
+	if (dlci) {
+		/* Data channel */
+		struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci);
+		if (!d) {
+			rfcomm_send_dm(s, dlci);
+			return s;
+		}
+
+		switch (d->state) {
+		case BT_CONNECT:
+			rfcomm_dlc_clear_timer(d);
+
+			rfcomm_dlc_lock(d);
+			d->state = BT_CONNECTED;
+			d->state_change(d, 0);
+			rfcomm_dlc_unlock(d);
+
+			rfcomm_send_msc(s, 1, dlci, d->v24_sig);
+			break;
+
+		case BT_DISCONN:
+			d->state = BT_CLOSED;
+			__rfcomm_dlc_close(d, 0);
+
+			if (list_empty(&s->dlcs)) {
+				s->state = BT_DISCONN;
+				rfcomm_send_disc(s, 0);
+				rfcomm_session_clear_timer(s);
+			}
+
+			break;
+		}
+	} else {
+		/* Control channel */
+		switch (s->state) {
+		case BT_CONNECT:
+			s->state = BT_CONNECTED;
+			rfcomm_process_connect(s);
+			break;
+
+		case BT_DISCONN:
+			s = rfcomm_session_close(s, ECONNRESET);
+			break;
+		}
+	}
+	return s;
+}
+
+static struct rfcomm_session *rfcomm_recv_dm(struct rfcomm_session *s, u8 dlci)
+{
+	int err = 0;
+
+	BT_DBG("session %p state %ld dlci %d", s, s->state, dlci);
+
+	if (dlci) {
+		/* Data DLC */
+		struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci);
+		if (d) {
+			if (d->state == BT_CONNECT || d->state == BT_CONFIG)
+				err = ECONNREFUSED;
+			else
+				err = ECONNRESET;
+
+			d->state = BT_CLOSED;
+			__rfcomm_dlc_close(d, err);
+		}
+	} else {
+		if (s->state == BT_CONNECT)
+			err = ECONNREFUSED;
+		else
+			err = ECONNRESET;
+
+		s = rfcomm_session_close(s, err);
+	}
+	return s;
+}
+
+static struct rfcomm_session *rfcomm_recv_disc(struct rfcomm_session *s,
+					       u8 dlci)
+{
+	int err = 0;
+
+	BT_DBG("session %p state %ld dlci %d", s, s->state, dlci);
+
+	if (dlci) {
+		struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci);
+		if (d) {
+			rfcomm_send_ua(s, dlci);
+
+			if (d->state == BT_CONNECT || d->state == BT_CONFIG)
+				err = ECONNREFUSED;
+			else
+				err = ECONNRESET;
+
+			d->state = BT_CLOSED;
+			__rfcomm_dlc_close(d, err);
+		} else
+			rfcomm_send_dm(s, dlci);
+
+	} else {
+		rfcomm_send_ua(s, 0);
+
+		if (s->state == BT_CONNECT)
+			err = ECONNREFUSED;
+		else
+			err = ECONNRESET;
+
+		s = rfcomm_session_close(s, err);
+	}
+	return s;
+}
+
+void rfcomm_dlc_accept(struct rfcomm_dlc *d)
+{
+	struct sock *sk = d->session->sock->sk;
+	struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn;
+
+	BT_DBG("dlc %p", d);
+
+	rfcomm_send_ua(d->session, d->dlci);
+
+	rfcomm_dlc_clear_timer(d);
+
+	rfcomm_dlc_lock(d);
+	d->state = BT_CONNECTED;
+	d->state_change(d, 0);
+	rfcomm_dlc_unlock(d);
+
+	if (d->role_switch)
+		hci_conn_switch_role(conn->hcon, 0x00);
+
+	rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig);
+}
+
+static void rfcomm_check_accept(struct rfcomm_dlc *d)
+{
+	if (rfcomm_check_security(d)) {
+		if (d->defer_setup) {
+			set_bit(RFCOMM_DEFER_SETUP, &d->flags);
+			rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT);
+
+			rfcomm_dlc_lock(d);
+			d->state = BT_CONNECT2;
+			d->state_change(d, 0);
+			rfcomm_dlc_unlock(d);
+		} else
+			rfcomm_dlc_accept(d);
+	} else {
+		set_bit(RFCOMM_AUTH_PENDING, &d->flags);
+		rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT);
+	}
+}
+
+static int rfcomm_recv_sabm(struct rfcomm_session *s, u8 dlci)
+{
+	struct rfcomm_dlc *d;
+	u8 channel;
+
+	BT_DBG("session %p state %ld dlci %d", s, s->state, dlci);
+
+	if (!dlci) {
+		rfcomm_send_ua(s, 0);
+
+		if (s->state == BT_OPEN) {
+			s->state = BT_CONNECTED;
+			rfcomm_process_connect(s);
+		}
+		return 0;
+	}
+
+	/* Check if DLC exists */
+	d = rfcomm_dlc_get(s, dlci);
+	if (d) {
+		if (d->state == BT_OPEN) {
+			/* DLC was previously opened by PN request */
+			rfcomm_check_accept(d);
+		}
+		return 0;
+	}
+
+	/* Notify socket layer about incoming connection */
+	channel = __srv_channel(dlci);
+	if (rfcomm_connect_ind(s, channel, &d)) {
+		d->dlci = dlci;
+		d->addr = __addr(s->initiator, dlci);
+		rfcomm_dlc_link(s, d);
+
+		rfcomm_check_accept(d);
+	} else {
+		rfcomm_send_dm(s, dlci);
+	}
+
+	return 0;
+}
+
+static int rfcomm_apply_pn(struct rfcomm_dlc *d, int cr, struct rfcomm_pn *pn)
+{
+	struct rfcomm_session *s = d->session;
+
+	BT_DBG("dlc %p state %ld dlci %d mtu %d fc 0x%x credits %d",
+			d, d->state, d->dlci, pn->mtu, pn->flow_ctrl, pn->credits);
+
+	if ((pn->flow_ctrl == 0xf0 && s->cfc != RFCOMM_CFC_DISABLED) ||
+						pn->flow_ctrl == 0xe0) {
+		d->cfc = RFCOMM_CFC_ENABLED;
+		d->tx_credits = pn->credits;
+	} else {
+		d->cfc = RFCOMM_CFC_DISABLED;
+		set_bit(RFCOMM_TX_THROTTLED, &d->flags);
+	}
+
+	if (s->cfc == RFCOMM_CFC_UNKNOWN)
+		s->cfc = d->cfc;
+
+	d->priority = pn->priority;
+
+	d->mtu = __le16_to_cpu(pn->mtu);
+
+	if (cr && d->mtu > s->mtu)
+		d->mtu = s->mtu;
+
+	return 0;
+}
+
+static int rfcomm_recv_pn(struct rfcomm_session *s, int cr, struct sk_buff *skb)
+{
+	struct rfcomm_pn *pn = (void *) skb->data;
+	struct rfcomm_dlc *d;
+	u8 dlci = pn->dlci;
+
+	BT_DBG("session %p state %ld dlci %d", s, s->state, dlci);
+
+	if (!dlci)
+		return 0;
+
+	d = rfcomm_dlc_get(s, dlci);
+	if (d) {
+		if (cr) {
+			/* PN request */
+			rfcomm_apply_pn(d, cr, pn);
+			rfcomm_send_pn(s, 0, d);
+		} else {
+			/* PN response */
+			switch (d->state) {
+			case BT_CONFIG:
+				rfcomm_apply_pn(d, cr, pn);
+
+				d->state = BT_CONNECT;
+				rfcomm_send_sabm(s, d->dlci);
+				break;
+			}
+		}
+	} else {
+		u8 channel = __srv_channel(dlci);
+
+		if (!cr)
+			return 0;
+
+		/* PN request for non existing DLC.
+		 * Assume incoming connection. */
+		if (rfcomm_connect_ind(s, channel, &d)) {
+			d->dlci = dlci;
+			d->addr = __addr(s->initiator, dlci);
+			rfcomm_dlc_link(s, d);
+
+			rfcomm_apply_pn(d, cr, pn);
+
+			d->state = BT_OPEN;
+			rfcomm_send_pn(s, 0, d);
+		} else {
+			rfcomm_send_dm(s, dlci);
+		}
+	}
+	return 0;
+}
+
+static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_buff *skb)
+{
+	struct rfcomm_rpn *rpn = (void *) skb->data;
+	u8 dlci = __get_dlci(rpn->dlci);
+
+	u8 bit_rate  = 0;
+	u8 data_bits = 0;
+	u8 stop_bits = 0;
+	u8 parity    = 0;
+	u8 flow_ctrl = 0;
+	u8 xon_char  = 0;
+	u8 xoff_char = 0;
+	u16 rpn_mask = RFCOMM_RPN_PM_ALL;
+
+	BT_DBG("dlci %d cr %d len 0x%x bitr 0x%x line 0x%x flow 0x%x xonc 0x%x xoffc 0x%x pm 0x%x",
+		dlci, cr, len, rpn->bit_rate, rpn->line_settings, rpn->flow_ctrl,
+		rpn->xon_char, rpn->xoff_char, rpn->param_mask);
+
+	if (!cr)
+		return 0;
+
+	if (len == 1) {
+		/* This is a request, return default (according to ETSI TS 07.10) settings */
+		bit_rate  = RFCOMM_RPN_BR_9600;
+		data_bits = RFCOMM_RPN_DATA_8;
+		stop_bits = RFCOMM_RPN_STOP_1;
+		parity    = RFCOMM_RPN_PARITY_NONE;
+		flow_ctrl = RFCOMM_RPN_FLOW_NONE;
+		xon_char  = RFCOMM_RPN_XON_CHAR;
+		xoff_char = RFCOMM_RPN_XOFF_CHAR;
+		goto rpn_out;
+	}
+
+	/* Check for sane values, ignore/accept bit_rate, 8 bits, 1 stop bit,
+	 * no parity, no flow control lines, normal XON/XOFF chars */
+
+	if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_BITRATE)) {
+		bit_rate = rpn->bit_rate;
+		if (bit_rate > RFCOMM_RPN_BR_230400) {
+			BT_DBG("RPN bit rate mismatch 0x%x", bit_rate);
+			bit_rate = RFCOMM_RPN_BR_9600;
+			rpn_mask ^= RFCOMM_RPN_PM_BITRATE;
+		}
+	}
+
+	if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_DATA)) {
+		data_bits = __get_rpn_data_bits(rpn->line_settings);
+		if (data_bits != RFCOMM_RPN_DATA_8) {
+			BT_DBG("RPN data bits mismatch 0x%x", data_bits);
+			data_bits = RFCOMM_RPN_DATA_8;
+			rpn_mask ^= RFCOMM_RPN_PM_DATA;
+		}
+	}
+
+	if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_STOP)) {
+		stop_bits = __get_rpn_stop_bits(rpn->line_settings);
+		if (stop_bits != RFCOMM_RPN_STOP_1) {
+			BT_DBG("RPN stop bits mismatch 0x%x", stop_bits);
+			stop_bits = RFCOMM_RPN_STOP_1;
+			rpn_mask ^= RFCOMM_RPN_PM_STOP;
+		}
+	}
+
+	if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_PARITY)) {
+		parity = __get_rpn_parity(rpn->line_settings);
+		if (parity != RFCOMM_RPN_PARITY_NONE) {
+			BT_DBG("RPN parity mismatch 0x%x", parity);
+			parity = RFCOMM_RPN_PARITY_NONE;
+			rpn_mask ^= RFCOMM_RPN_PM_PARITY;
+		}
+	}
+
+	if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_FLOW)) {
+		flow_ctrl = rpn->flow_ctrl;
+		if (flow_ctrl != RFCOMM_RPN_FLOW_NONE) {
+			BT_DBG("RPN flow ctrl mismatch 0x%x", flow_ctrl);
+			flow_ctrl = RFCOMM_RPN_FLOW_NONE;
+			rpn_mask ^= RFCOMM_RPN_PM_FLOW;
+		}
+	}
+
+	if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_XON)) {
+		xon_char = rpn->xon_char;
+		if (xon_char != RFCOMM_RPN_XON_CHAR) {
+			BT_DBG("RPN XON char mismatch 0x%x", xon_char);
+			xon_char = RFCOMM_RPN_XON_CHAR;
+			rpn_mask ^= RFCOMM_RPN_PM_XON;
+		}
+	}
+
+	if (rpn->param_mask & cpu_to_le16(RFCOMM_RPN_PM_XOFF)) {
+		xoff_char = rpn->xoff_char;
+		if (xoff_char != RFCOMM_RPN_XOFF_CHAR) {
+			BT_DBG("RPN XOFF char mismatch 0x%x", xoff_char);
+			xoff_char = RFCOMM_RPN_XOFF_CHAR;
+			rpn_mask ^= RFCOMM_RPN_PM_XOFF;
+		}
+	}
+
+rpn_out:
+	rfcomm_send_rpn(s, 0, dlci, bit_rate, data_bits, stop_bits,
+			parity, flow_ctrl, xon_char, xoff_char, rpn_mask);
+
+	return 0;
+}
+
+static int rfcomm_recv_rls(struct rfcomm_session *s, int cr, struct sk_buff *skb)
+{
+	struct rfcomm_rls *rls = (void *) skb->data;
+	u8 dlci = __get_dlci(rls->dlci);
+
+	BT_DBG("dlci %d cr %d status 0x%x", dlci, cr, rls->status);
+
+	if (!cr)
+		return 0;
+
+	/* We should probably do something with this information here. But
+	 * for now it's sufficient just to reply -- Bluetooth 1.1 says it's
+	 * mandatory to recognise and respond to RLS */
+
+	rfcomm_send_rls(s, 0, dlci, rls->status);
+
+	return 0;
+}
+
+static int rfcomm_recv_msc(struct rfcomm_session *s, int cr, struct sk_buff *skb)
+{
+	struct rfcomm_msc *msc = (void *) skb->data;
+	struct rfcomm_dlc *d;
+	u8 dlci = __get_dlci(msc->dlci);
+
+	BT_DBG("dlci %d cr %d v24 0x%x", dlci, cr, msc->v24_sig);
+
+	d = rfcomm_dlc_get(s, dlci);
+	if (!d)
+		return 0;
+
+	if (cr) {
+		if (msc->v24_sig & RFCOMM_V24_FC && !d->cfc)
+			set_bit(RFCOMM_TX_THROTTLED, &d->flags);
+		else
+			clear_bit(RFCOMM_TX_THROTTLED, &d->flags);
+
+		rfcomm_dlc_lock(d);
+
+		d->remote_v24_sig = msc->v24_sig;
+
+		if (d->modem_status)
+			d->modem_status(d, msc->v24_sig);
+
+		rfcomm_dlc_unlock(d);
+
+		rfcomm_send_msc(s, 0, dlci, msc->v24_sig);
+
+		d->mscex |= RFCOMM_MSCEX_RX;
+	} else
+		d->mscex |= RFCOMM_MSCEX_TX;
+
+	return 0;
+}
+
+static int rfcomm_recv_mcc(struct rfcomm_session *s, struct sk_buff *skb)
+{
+	struct rfcomm_mcc *mcc = (void *) skb->data;
+	u8 type, cr, len;
+
+	cr   = __test_cr(mcc->type);
+	type = __get_mcc_type(mcc->type);
+	len  = __get_mcc_len(mcc->len);
+
+	BT_DBG("%p type 0x%x cr %d", s, type, cr);
+
+	skb_pull(skb, 2);
+
+	switch (type) {
+	case RFCOMM_PN:
+		rfcomm_recv_pn(s, cr, skb);
+		break;
+
+	case RFCOMM_RPN:
+		rfcomm_recv_rpn(s, cr, len, skb);
+		break;
+
+	case RFCOMM_RLS:
+		rfcomm_recv_rls(s, cr, skb);
+		break;
+
+	case RFCOMM_MSC:
+		rfcomm_recv_msc(s, cr, skb);
+		break;
+
+	case RFCOMM_FCOFF:
+		if (cr) {
+			set_bit(RFCOMM_TX_THROTTLED, &s->flags);
+			rfcomm_send_fcoff(s, 0);
+		}
+		break;
+
+	case RFCOMM_FCON:
+		if (cr) {
+			clear_bit(RFCOMM_TX_THROTTLED, &s->flags);
+			rfcomm_send_fcon(s, 0);
+		}
+		break;
+
+	case RFCOMM_TEST:
+		if (cr)
+			rfcomm_send_test(s, 0, skb->data, skb->len);
+		break;
+
+	case RFCOMM_NSC:
+		break;
+
+	default:
+		BT_ERR("Unknown control type 0x%02x", type);
+		rfcomm_send_nsc(s, cr, type);
+		break;
+	}
+	return 0;
+}
+
+static int rfcomm_recv_data(struct rfcomm_session *s, u8 dlci, int pf, struct sk_buff *skb)
+{
+	struct rfcomm_dlc *d;
+
+	BT_DBG("session %p state %ld dlci %d pf %d", s, s->state, dlci, pf);
+
+	d = rfcomm_dlc_get(s, dlci);
+	if (!d) {
+		rfcomm_send_dm(s, dlci);
+		goto drop;
+	}
+
+	if (pf && d->cfc) {
+		u8 credits = *(u8 *) skb->data; skb_pull(skb, 1);
+
+		d->tx_credits += credits;
+		if (d->tx_credits)
+			clear_bit(RFCOMM_TX_THROTTLED, &d->flags);
+	}
+
+	if (skb->len && d->state == BT_CONNECTED) {
+		rfcomm_dlc_lock(d);
+		d->rx_credits--;
+		d->data_ready(d, skb);
+		rfcomm_dlc_unlock(d);
+		return 0;
+	}
+
+drop:
+	kfree_skb(skb);
+	return 0;
+}
+
+static struct rfcomm_session *rfcomm_recv_frame(struct rfcomm_session *s,
+						struct sk_buff *skb)
+{
+	struct rfcomm_hdr *hdr = (void *) skb->data;
+	u8 type, dlci, fcs;
+
+	if (!s) {
+		/* no session, so free socket data */
+		kfree_skb(skb);
+		return s;
+	}
+
+	dlci = __get_dlci(hdr->addr);
+	type = __get_type(hdr->ctrl);
+
+	/* Trim FCS */
+	skb->len--; skb->tail--;
+	fcs = *(u8 *)skb_tail_pointer(skb);
+
+	if (__check_fcs(skb->data, type, fcs)) {
+		BT_ERR("bad checksum in packet");
+		kfree_skb(skb);
+		return s;
+	}
+
+	if (__test_ea(hdr->len))
+		skb_pull(skb, 3);
+	else
+		skb_pull(skb, 4);
+
+	switch (type) {
+	case RFCOMM_SABM:
+		if (__test_pf(hdr->ctrl))
+			rfcomm_recv_sabm(s, dlci);
+		break;
+
+	case RFCOMM_DISC:
+		if (__test_pf(hdr->ctrl))
+			s = rfcomm_recv_disc(s, dlci);
+		break;
+
+	case RFCOMM_UA:
+		if (__test_pf(hdr->ctrl))
+			s = rfcomm_recv_ua(s, dlci);
+		break;
+
+	case RFCOMM_DM:
+		s = rfcomm_recv_dm(s, dlci);
+		break;
+
+	case RFCOMM_UIH:
+		if (dlci) {
+			rfcomm_recv_data(s, dlci, __test_pf(hdr->ctrl), skb);
+			return s;
+		}
+		rfcomm_recv_mcc(s, skb);
+		break;
+
+	default:
+		BT_ERR("Unknown packet type 0x%02x", type);
+		break;
+	}
+	kfree_skb(skb);
+	return s;
+}
+
+/* ---- Connection and data processing ---- */
+
+static void rfcomm_process_connect(struct rfcomm_session *s)
+{
+	struct rfcomm_dlc *d, *n;
+
+	BT_DBG("session %p state %ld", s, s->state);
+
+	list_for_each_entry_safe(d, n, &s->dlcs, list) {
+		if (d->state == BT_CONFIG) {
+			d->mtu = s->mtu;
+			if (rfcomm_check_security(d)) {
+				rfcomm_send_pn(s, 1, d);
+			} else {
+				set_bit(RFCOMM_AUTH_PENDING, &d->flags);
+				rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT);
+			}
+		}
+	}
+}
+
+/* Send data queued for the DLC.
+ * Return number of frames left in the queue.
+ */
+static int rfcomm_process_tx(struct rfcomm_dlc *d)
+{
+	struct sk_buff *skb;
+	int err;
+
+	BT_DBG("dlc %p state %ld cfc %d rx_credits %d tx_credits %d",
+			d, d->state, d->cfc, d->rx_credits, d->tx_credits);
+
+	/* Send pending MSC */
+	if (test_and_clear_bit(RFCOMM_MSC_PENDING, &d->flags))
+		rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig);
+
+	if (d->cfc) {
+		/* CFC enabled.
+		 * Give them some credits */
+		if (!test_bit(RFCOMM_RX_THROTTLED, &d->flags) &&
+				d->rx_credits <= (d->cfc >> 2)) {
+			rfcomm_send_credits(d->session, d->addr, d->cfc - d->rx_credits);
+			d->rx_credits = d->cfc;
+		}
+	} else {
+		/* CFC disabled.
+		 * Give ourselves some credits */
+		d->tx_credits = 5;
+	}
+
+	if (test_bit(RFCOMM_TX_THROTTLED, &d->flags))
+		return skb_queue_len(&d->tx_queue);
+
+	while (d->tx_credits && (skb = skb_dequeue(&d->tx_queue))) {
+		err = rfcomm_send_frame(d->session, skb->data, skb->len);
+		if (err < 0) {
+			skb_queue_head(&d->tx_queue, skb);
+			break;
+		}
+		kfree_skb(skb);
+		d->tx_credits--;
+	}
+
+	if (d->cfc && !d->tx_credits) {
+		/* We're out of TX credits.
+		 * Set TX_THROTTLED flag to avoid unnesary wakeups by dlc_send. */
+		set_bit(RFCOMM_TX_THROTTLED, &d->flags);
+	}
+
+	return skb_queue_len(&d->tx_queue);
+}
+
+static void rfcomm_process_dlcs(struct rfcomm_session *s)
+{
+	struct rfcomm_dlc *d, *n;
+
+	BT_DBG("session %p state %ld", s, s->state);
+
+	list_for_each_entry_safe(d, n, &s->dlcs, list) {
+		if (test_bit(RFCOMM_TIMED_OUT, &d->flags)) {
+			__rfcomm_dlc_close(d, ETIMEDOUT);
+			continue;
+		}
+
+		if (test_bit(RFCOMM_ENC_DROP, &d->flags)) {
+			__rfcomm_dlc_close(d, ECONNREFUSED);
+			continue;
+		}
+
+		if (test_and_clear_bit(RFCOMM_AUTH_ACCEPT, &d->flags)) {
+			rfcomm_dlc_clear_timer(d);
+			if (d->out) {
+				rfcomm_send_pn(s, 1, d);
+				rfcomm_dlc_set_timer(d, RFCOMM_CONN_TIMEOUT);
+			} else {
+				if (d->defer_setup) {
+					set_bit(RFCOMM_DEFER_SETUP, &d->flags);
+					rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT);
+
+					rfcomm_dlc_lock(d);
+					d->state = BT_CONNECT2;
+					d->state_change(d, 0);
+					rfcomm_dlc_unlock(d);
+				} else
+					rfcomm_dlc_accept(d);
+			}
+			continue;
+		} else if (test_and_clear_bit(RFCOMM_AUTH_REJECT, &d->flags)) {
+			rfcomm_dlc_clear_timer(d);
+			if (!d->out)
+				rfcomm_send_dm(s, d->dlci);
+			else
+				d->state = BT_CLOSED;
+			__rfcomm_dlc_close(d, ECONNREFUSED);
+			continue;
+		}
+
+		if (test_bit(RFCOMM_SEC_PENDING, &d->flags))
+			continue;
+
+		if (test_bit(RFCOMM_TX_THROTTLED, &s->flags))
+			continue;
+
+		if ((d->state == BT_CONNECTED || d->state == BT_DISCONN) &&
+						d->mscex == RFCOMM_MSCEX_OK)
+			rfcomm_process_tx(d);
+	}
+}
+
+static struct rfcomm_session *rfcomm_process_rx(struct rfcomm_session *s)
+{
+	struct socket *sock = s->sock;
+	struct sock *sk = sock->sk;
+	struct sk_buff *skb;
+
+	BT_DBG("session %p state %ld qlen %d", s, s->state, skb_queue_len(&sk->sk_receive_queue));
+
+	/* Get data directly from socket receive queue without copying it. */
+	while ((skb = skb_dequeue(&sk->sk_receive_queue))) {
+		skb_orphan(skb);
+		if (!skb_linearize(skb)) {
+			s = rfcomm_recv_frame(s, skb);
+			if (!s)
+				break;
+		} else {
+			kfree_skb(skb);
+		}
+	}
+
+	if (s && (sk->sk_state == BT_CLOSED))
+		s = rfcomm_session_close(s, sk->sk_err);
+
+	return s;
+}
+
+static void rfcomm_accept_connection(struct rfcomm_session *s)
+{
+	struct socket *sock = s->sock, *nsock;
+	int err;
+
+	/* Fast check for a new connection.
+	 * Avoids unnesesary socket allocations. */
+	if (list_empty(&bt_sk(sock->sk)->accept_q))
+		return;
+
+	BT_DBG("session %p", s);
+
+	err = kernel_accept(sock, &nsock, O_NONBLOCK);
+	if (err < 0)
+		return;
+
+	/* Set our callbacks */
+	nsock->sk->sk_data_ready   = rfcomm_l2data_ready;
+	nsock->sk->sk_state_change = rfcomm_l2state_change;
+
+	s = rfcomm_session_add(nsock, BT_OPEN);
+	if (s) {
+		/* We should adjust MTU on incoming sessions.
+		 * L2CAP MTU minus UIH header and FCS. */
+		s->mtu = min(l2cap_pi(nsock->sk)->chan->omtu,
+				l2cap_pi(nsock->sk)->chan->imtu) - 5;
+
+		rfcomm_schedule();
+	} else
+		sock_release(nsock);
+}
+
+static struct rfcomm_session *rfcomm_check_connection(struct rfcomm_session *s)
+{
+	struct sock *sk = s->sock->sk;
+
+	BT_DBG("%p state %ld", s, s->state);
+
+	switch (sk->sk_state) {
+	case BT_CONNECTED:
+		s->state = BT_CONNECT;
+
+		/* We can adjust MTU on outgoing sessions.
+		 * L2CAP MTU minus UIH header and FCS. */
+		s->mtu = min(l2cap_pi(sk)->chan->omtu, l2cap_pi(sk)->chan->imtu) - 5;
+
+		rfcomm_send_sabm(s, 0);
+		break;
+
+	case BT_CLOSED:
+		s = rfcomm_session_close(s, sk->sk_err);
+		break;
+	}
+	return s;
+}
+
+static void rfcomm_process_sessions(void)
+{
+	struct rfcomm_session *s, *n;
+
+	rfcomm_lock();
+
+	list_for_each_entry_safe(s, n, &session_list, list) {
+		if (test_and_clear_bit(RFCOMM_TIMED_OUT, &s->flags)) {
+			s->state = BT_DISCONN;
+			rfcomm_send_disc(s, 0);
+			continue;
+		}
+
+		switch (s->state) {
+		case BT_LISTEN:
+			rfcomm_accept_connection(s);
+			continue;
+
+		case BT_BOUND:
+			s = rfcomm_check_connection(s);
+			break;
+
+		default:
+			s = rfcomm_process_rx(s);
+			break;
+		}
+
+		if (s)
+			rfcomm_process_dlcs(s);
+	}
+
+	rfcomm_unlock();
+}
+
+static int rfcomm_add_listener(bdaddr_t *ba)
+{
+	struct sockaddr_l2 addr;
+	struct socket *sock;
+	struct sock *sk;
+	struct rfcomm_session *s;
+	int    err = 0;
+
+	/* Create socket */
+	err = rfcomm_l2sock_create(&sock);
+	if (err < 0) {
+		BT_ERR("Create socket failed %d", err);
+		return err;
+	}
+
+	/* Bind socket */
+	bacpy(&addr.l2_bdaddr, ba);
+	addr.l2_family = AF_BLUETOOTH;
+	addr.l2_psm    = cpu_to_le16(L2CAP_PSM_RFCOMM);
+	addr.l2_cid    = 0;
+	addr.l2_bdaddr_type = BDADDR_BREDR;
+	err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr));
+	if (err < 0) {
+		BT_ERR("Bind failed %d", err);
+		goto failed;
+	}
+
+	/* Set L2CAP options */
+	sk = sock->sk;
+	lock_sock(sk);
+	/* Set MTU to 0 so L2CAP can auto select the MTU */
+	l2cap_pi(sk)->chan->imtu = 0;
+	release_sock(sk);
+
+	/* Start listening on the socket */
+	err = kernel_listen(sock, 10);
+	if (err) {
+		BT_ERR("Listen failed %d", err);
+		goto failed;
+	}
+
+	/* Add listening session */
+	s = rfcomm_session_add(sock, BT_LISTEN);
+	if (!s) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	return 0;
+failed:
+	sock_release(sock);
+	return err;
+}
+
+static void rfcomm_kill_listener(void)
+{
+	struct rfcomm_session *s, *n;
+
+	BT_DBG("");
+
+	list_for_each_entry_safe(s, n, &session_list, list)
+		rfcomm_session_del(s);
+}
+
+static int rfcomm_run(void *unused)
+{
+	DEFINE_WAIT_FUNC(wait, woken_wake_function);
+	BT_DBG("");
+
+	set_user_nice(current, -10);
+
+	rfcomm_add_listener(BDADDR_ANY);
+
+	add_wait_queue(&rfcomm_wq, &wait);
+	while (!kthread_should_stop()) {
+
+		/* Process stuff */
+		rfcomm_process_sessions();
+
+		wait_woken(&wait, TASK_INTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
+	}
+	remove_wait_queue(&rfcomm_wq, &wait);
+
+	rfcomm_kill_listener();
+
+	return 0;
+}
+
+static void rfcomm_security_cfm(struct hci_conn *conn, u8 status, u8 encrypt)
+{
+	struct rfcomm_session *s;
+	struct rfcomm_dlc *d, *n;
+
+	BT_DBG("conn %p status 0x%02x encrypt 0x%02x", conn, status, encrypt);
+
+	s = rfcomm_session_get(&conn->hdev->bdaddr, &conn->dst);
+	if (!s)
+		return;
+
+	list_for_each_entry_safe(d, n, &s->dlcs, list) {
+		if (test_and_clear_bit(RFCOMM_SEC_PENDING, &d->flags)) {
+			rfcomm_dlc_clear_timer(d);
+			if (status || encrypt == 0x00) {
+				set_bit(RFCOMM_ENC_DROP, &d->flags);
+				continue;
+			}
+		}
+
+		if (d->state == BT_CONNECTED && !status && encrypt == 0x00) {
+			if (d->sec_level == BT_SECURITY_MEDIUM) {
+				set_bit(RFCOMM_SEC_PENDING, &d->flags);
+				rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT);
+				continue;
+			} else if (d->sec_level == BT_SECURITY_HIGH ||
+				   d->sec_level == BT_SECURITY_FIPS) {
+				set_bit(RFCOMM_ENC_DROP, &d->flags);
+				continue;
+			}
+		}
+
+		if (!test_and_clear_bit(RFCOMM_AUTH_PENDING, &d->flags))
+			continue;
+
+		if (!status && hci_conn_check_secure(conn, d->sec_level))
+			set_bit(RFCOMM_AUTH_ACCEPT, &d->flags);
+		else
+			set_bit(RFCOMM_AUTH_REJECT, &d->flags);
+	}
+
+	rfcomm_schedule();
+}
+
+static struct hci_cb rfcomm_cb = {
+	.name		= "RFCOMM",
+	.security_cfm	= rfcomm_security_cfm
+};
+
+static int rfcomm_dlc_debugfs_show(struct seq_file *f, void *x)
+{
+	struct rfcomm_session *s;
+
+	rfcomm_lock();
+
+	list_for_each_entry(s, &session_list, list) {
+		struct l2cap_chan *chan = l2cap_pi(s->sock->sk)->chan;
+		struct rfcomm_dlc *d;
+		list_for_each_entry(d, &s->dlcs, list) {
+			seq_printf(f, "%pMR %pMR %ld %d %d %d %d\n",
+				   &chan->src, &chan->dst,
+				   d->state, d->dlci, d->mtu,
+				   d->rx_credits, d->tx_credits);
+		}
+	}
+
+	rfcomm_unlock();
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(rfcomm_dlc_debugfs);
+
+static struct dentry *rfcomm_dlc_debugfs;
+
+/* ---- Initialization ---- */
+static int __init rfcomm_init(void)
+{
+	int err;
+
+	hci_register_cb(&rfcomm_cb);
+
+	rfcomm_thread = kthread_run(rfcomm_run, NULL, "krfcommd");
+	if (IS_ERR(rfcomm_thread)) {
+		err = PTR_ERR(rfcomm_thread);
+		goto unregister;
+	}
+
+	err = rfcomm_init_ttys();
+	if (err < 0)
+		goto stop;
+
+	err = rfcomm_init_sockets();
+	if (err < 0)
+		goto cleanup;
+
+	BT_INFO("RFCOMM ver %s", VERSION);
+
+	if (IS_ERR_OR_NULL(bt_debugfs))
+		return 0;
+
+	rfcomm_dlc_debugfs = debugfs_create_file("rfcomm_dlc", 0444,
+						 bt_debugfs, NULL,
+						 &rfcomm_dlc_debugfs_fops);
+
+	return 0;
+
+cleanup:
+	rfcomm_cleanup_ttys();
+
+stop:
+	kthread_stop(rfcomm_thread);
+
+unregister:
+	hci_unregister_cb(&rfcomm_cb);
+
+	return err;
+}
+
+static void __exit rfcomm_exit(void)
+{
+	debugfs_remove(rfcomm_dlc_debugfs);
+
+	hci_unregister_cb(&rfcomm_cb);
+
+	kthread_stop(rfcomm_thread);
+
+	rfcomm_cleanup_ttys();
+
+	rfcomm_cleanup_sockets();
+}
+
+module_init(rfcomm_init);
+module_exit(rfcomm_exit);
+
+module_param(disable_cfc, bool, 0644);
+MODULE_PARM_DESC(disable_cfc, "Disable credit based flow control");
+
+module_param(channel_mtu, int, 0644);
+MODULE_PARM_DESC(channel_mtu, "Default MTU for the RFCOMM channel");
+
+module_param(l2cap_ertm, bool, 0644);
+MODULE_PARM_DESC(l2cap_ertm, "Use L2CAP ERTM mode for connection");
+
+MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
+MODULE_DESCRIPTION("Bluetooth RFCOMM ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("bt-proto-3");
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
new file mode 100644
index 000000000..4cf1fa990
--- /dev/null
+++ b/net/bluetooth/rfcomm/sock.c
@@ -0,0 +1,1085 @@
+/*
+   RFCOMM implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
+   Copyright (C) 2002 Marcel Holtmann <marcel@holtmann.org>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/*
+ * RFCOMM sockets.
+ */
+#include <linux/compat.h>
+#include <linux/export.h>
+#include <linux/debugfs.h>
+#include <linux/sched/signal.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/l2cap.h>
+#include <net/bluetooth/rfcomm.h>
+
+static const struct proto_ops rfcomm_sock_ops;
+
+static struct bt_sock_list rfcomm_sk_list = {
+	.lock = __RW_LOCK_UNLOCKED(rfcomm_sk_list.lock)
+};
+
+static void rfcomm_sock_close(struct sock *sk);
+static void rfcomm_sock_kill(struct sock *sk);
+
+/* ---- DLC callbacks ----
+ *
+ * called under rfcomm_dlc_lock()
+ */
+static void rfcomm_sk_data_ready(struct rfcomm_dlc *d, struct sk_buff *skb)
+{
+	struct sock *sk = d->owner;
+	if (!sk)
+		return;
+
+	atomic_add(skb->len, &sk->sk_rmem_alloc);
+	skb_queue_tail(&sk->sk_receive_queue, skb);
+	sk->sk_data_ready(sk);
+
+	if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf)
+		rfcomm_dlc_throttle(d);
+}
+
+static void rfcomm_sk_state_change(struct rfcomm_dlc *d, int err)
+{
+	struct sock *sk = d->owner, *parent;
+
+	if (!sk)
+		return;
+
+	BT_DBG("dlc %p state %ld err %d", d, d->state, err);
+
+	spin_lock_bh(&sk->sk_lock.slock);
+
+	if (err)
+		sk->sk_err = err;
+
+	sk->sk_state = d->state;
+
+	parent = bt_sk(sk)->parent;
+	if (parent) {
+		if (d->state == BT_CLOSED) {
+			sock_set_flag(sk, SOCK_ZAPPED);
+			bt_accept_unlink(sk);
+		}
+		parent->sk_data_ready(parent);
+	} else {
+		if (d->state == BT_CONNECTED)
+			rfcomm_session_getaddr(d->session,
+					       &rfcomm_pi(sk)->src, NULL);
+		sk->sk_state_change(sk);
+	}
+
+	spin_unlock_bh(&sk->sk_lock.slock);
+
+	if (parent && sock_flag(sk, SOCK_ZAPPED)) {
+		/* We have to drop DLC lock here, otherwise
+		 * rfcomm_sock_destruct() will dead lock. */
+		rfcomm_dlc_unlock(d);
+		rfcomm_sock_kill(sk);
+		rfcomm_dlc_lock(d);
+	}
+}
+
+/* ---- Socket functions ---- */
+static struct sock *__rfcomm_get_listen_sock_by_addr(u8 channel, bdaddr_t *src)
+{
+	struct sock *sk = NULL;
+
+	sk_for_each(sk, &rfcomm_sk_list.head) {
+		if (rfcomm_pi(sk)->channel != channel)
+			continue;
+
+		if (bacmp(&rfcomm_pi(sk)->src, src))
+			continue;
+
+		if (sk->sk_state == BT_BOUND || sk->sk_state == BT_LISTEN)
+			break;
+	}
+
+	return sk ? sk : NULL;
+}
+
+/* Find socket with channel and source bdaddr.
+ * Returns closest match.
+ */
+static struct sock *rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
+{
+	struct sock *sk = NULL, *sk1 = NULL;
+
+	read_lock(&rfcomm_sk_list.lock);
+
+	sk_for_each(sk, &rfcomm_sk_list.head) {
+		if (state && sk->sk_state != state)
+			continue;
+
+		if (rfcomm_pi(sk)->channel == channel) {
+			/* Exact match. */
+			if (!bacmp(&rfcomm_pi(sk)->src, src))
+				break;
+
+			/* Closest match */
+			if (!bacmp(&rfcomm_pi(sk)->src, BDADDR_ANY))
+				sk1 = sk;
+		}
+	}
+
+	read_unlock(&rfcomm_sk_list.lock);
+
+	return sk ? sk : sk1;
+}
+
+static void rfcomm_sock_destruct(struct sock *sk)
+{
+	struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
+
+	BT_DBG("sk %p dlc %p", sk, d);
+
+	skb_queue_purge(&sk->sk_receive_queue);
+	skb_queue_purge(&sk->sk_write_queue);
+
+	rfcomm_dlc_lock(d);
+	rfcomm_pi(sk)->dlc = NULL;
+
+	/* Detach DLC if it's owned by this socket */
+	if (d->owner == sk)
+		d->owner = NULL;
+	rfcomm_dlc_unlock(d);
+
+	rfcomm_dlc_put(d);
+}
+
+static void rfcomm_sock_cleanup_listen(struct sock *parent)
+{
+	struct sock *sk;
+
+	BT_DBG("parent %p", parent);
+
+	/* Close not yet accepted dlcs */
+	while ((sk = bt_accept_dequeue(parent, NULL))) {
+		rfcomm_sock_close(sk);
+		rfcomm_sock_kill(sk);
+	}
+
+	parent->sk_state  = BT_CLOSED;
+	sock_set_flag(parent, SOCK_ZAPPED);
+}
+
+/* Kill socket (only if zapped and orphan)
+ * Must be called on unlocked socket.
+ */
+static void rfcomm_sock_kill(struct sock *sk)
+{
+	if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
+		return;
+
+	BT_DBG("sk %p state %d refcnt %d", sk, sk->sk_state, refcount_read(&sk->sk_refcnt));
+
+	/* Kill poor orphan */
+	bt_sock_unlink(&rfcomm_sk_list, sk);
+	sock_set_flag(sk, SOCK_DEAD);
+	sock_put(sk);
+}
+
+static void __rfcomm_sock_close(struct sock *sk)
+{
+	struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
+
+	BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
+
+	switch (sk->sk_state) {
+	case BT_LISTEN:
+		rfcomm_sock_cleanup_listen(sk);
+		break;
+
+	case BT_CONNECT:
+	case BT_CONNECT2:
+	case BT_CONFIG:
+	case BT_CONNECTED:
+		rfcomm_dlc_close(d, 0);
+		fallthrough;
+
+	default:
+		sock_set_flag(sk, SOCK_ZAPPED);
+		break;
+	}
+}
+
+/* Close socket.
+ * Must be called on unlocked socket.
+ */
+static void rfcomm_sock_close(struct sock *sk)
+{
+	lock_sock(sk);
+	__rfcomm_sock_close(sk);
+	release_sock(sk);
+}
+
+static void rfcomm_sock_init(struct sock *sk, struct sock *parent)
+{
+	struct rfcomm_pinfo *pi = rfcomm_pi(sk);
+
+	BT_DBG("sk %p", sk);
+
+	if (parent) {
+		sk->sk_type = parent->sk_type;
+		pi->dlc->defer_setup = test_bit(BT_SK_DEFER_SETUP,
+						&bt_sk(parent)->flags);
+
+		pi->sec_level = rfcomm_pi(parent)->sec_level;
+		pi->role_switch = rfcomm_pi(parent)->role_switch;
+
+		security_sk_clone(parent, sk);
+	} else {
+		pi->dlc->defer_setup = 0;
+
+		pi->sec_level = BT_SECURITY_LOW;
+		pi->role_switch = 0;
+	}
+
+	pi->dlc->sec_level = pi->sec_level;
+	pi->dlc->role_switch = pi->role_switch;
+}
+
+static struct proto rfcomm_proto = {
+	.name		= "RFCOMM",
+	.owner		= THIS_MODULE,
+	.obj_size	= sizeof(struct rfcomm_pinfo)
+};
+
+static struct sock *rfcomm_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio, int kern)
+{
+	struct rfcomm_dlc *d;
+	struct sock *sk;
+
+	sk = sk_alloc(net, PF_BLUETOOTH, prio, &rfcomm_proto, kern);
+	if (!sk)
+		return NULL;
+
+	sock_init_data(sock, sk);
+	INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
+
+	d = rfcomm_dlc_alloc(prio);
+	if (!d) {
+		sk_free(sk);
+		return NULL;
+	}
+
+	d->data_ready   = rfcomm_sk_data_ready;
+	d->state_change = rfcomm_sk_state_change;
+
+	rfcomm_pi(sk)->dlc = d;
+	d->owner = sk;
+
+	sk->sk_destruct = rfcomm_sock_destruct;
+	sk->sk_sndtimeo = RFCOMM_CONN_TIMEOUT;
+
+	sk->sk_sndbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10;
+	sk->sk_rcvbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10;
+
+	sock_reset_flag(sk, SOCK_ZAPPED);
+
+	sk->sk_protocol = proto;
+	sk->sk_state    = BT_OPEN;
+
+	bt_sock_link(&rfcomm_sk_list, sk);
+
+	BT_DBG("sk %p", sk);
+	return sk;
+}
+
+static int rfcomm_sock_create(struct net *net, struct socket *sock,
+			      int protocol, int kern)
+{
+	struct sock *sk;
+
+	BT_DBG("sock %p", sock);
+
+	sock->state = SS_UNCONNECTED;
+
+	if (sock->type != SOCK_STREAM && sock->type != SOCK_RAW)
+		return -ESOCKTNOSUPPORT;
+
+	sock->ops = &rfcomm_sock_ops;
+
+	sk = rfcomm_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
+	if (!sk)
+		return -ENOMEM;
+
+	rfcomm_sock_init(sk, NULL);
+	return 0;
+}
+
+static int rfcomm_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
+{
+	struct sockaddr_rc sa;
+	struct sock *sk = sock->sk;
+	int len, err = 0;
+
+	if (!addr || addr_len < offsetofend(struct sockaddr, sa_family) ||
+	    addr->sa_family != AF_BLUETOOTH)
+		return -EINVAL;
+
+	memset(&sa, 0, sizeof(sa));
+	len = min_t(unsigned int, sizeof(sa), addr_len);
+	memcpy(&sa, addr, len);
+
+	BT_DBG("sk %p %pMR", sk, &sa.rc_bdaddr);
+
+	lock_sock(sk);
+
+	if (sk->sk_state != BT_OPEN) {
+		err = -EBADFD;
+		goto done;
+	}
+
+	if (sk->sk_type != SOCK_STREAM) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	write_lock(&rfcomm_sk_list.lock);
+
+	if (sa.rc_channel &&
+	    __rfcomm_get_listen_sock_by_addr(sa.rc_channel, &sa.rc_bdaddr)) {
+		err = -EADDRINUSE;
+	} else {
+		/* Save source address */
+		bacpy(&rfcomm_pi(sk)->src, &sa.rc_bdaddr);
+		rfcomm_pi(sk)->channel = sa.rc_channel;
+		sk->sk_state = BT_BOUND;
+	}
+
+	write_unlock(&rfcomm_sk_list.lock);
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static int rfcomm_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
+{
+	struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
+	struct sock *sk = sock->sk;
+	struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
+	int err = 0;
+
+	BT_DBG("sk %p", sk);
+
+	if (alen < sizeof(struct sockaddr_rc) ||
+	    addr->sa_family != AF_BLUETOOTH)
+		return -EINVAL;
+
+	lock_sock(sk);
+
+	if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) {
+		err = -EBADFD;
+		goto done;
+	}
+
+	if (sk->sk_type != SOCK_STREAM) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	sk->sk_state = BT_CONNECT;
+	bacpy(&rfcomm_pi(sk)->dst, &sa->rc_bdaddr);
+	rfcomm_pi(sk)->channel = sa->rc_channel;
+
+	d->sec_level = rfcomm_pi(sk)->sec_level;
+	d->role_switch = rfcomm_pi(sk)->role_switch;
+
+	err = rfcomm_dlc_open(d, &rfcomm_pi(sk)->src, &sa->rc_bdaddr,
+			      sa->rc_channel);
+	if (!err)
+		err = bt_sock_wait_state(sk, BT_CONNECTED,
+				sock_sndtimeo(sk, flags & O_NONBLOCK));
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static int rfcomm_sock_listen(struct socket *sock, int backlog)
+{
+	struct sock *sk = sock->sk;
+	int err = 0;
+
+	BT_DBG("sk %p backlog %d", sk, backlog);
+
+	lock_sock(sk);
+
+	if (sk->sk_state != BT_BOUND) {
+		err = -EBADFD;
+		goto done;
+	}
+
+	if (sk->sk_type != SOCK_STREAM) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	if (!rfcomm_pi(sk)->channel) {
+		bdaddr_t *src = &rfcomm_pi(sk)->src;
+		u8 channel;
+
+		err = -EINVAL;
+
+		write_lock(&rfcomm_sk_list.lock);
+
+		for (channel = 1; channel < 31; channel++)
+			if (!__rfcomm_get_listen_sock_by_addr(channel, src)) {
+				rfcomm_pi(sk)->channel = channel;
+				err = 0;
+				break;
+			}
+
+		write_unlock(&rfcomm_sk_list.lock);
+
+		if (err < 0)
+			goto done;
+	}
+
+	sk->sk_max_ack_backlog = backlog;
+	sk->sk_ack_backlog = 0;
+	sk->sk_state = BT_LISTEN;
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static int rfcomm_sock_accept(struct socket *sock, struct socket *newsock, int flags,
+			      bool kern)
+{
+	DEFINE_WAIT_FUNC(wait, woken_wake_function);
+	struct sock *sk = sock->sk, *nsk;
+	long timeo;
+	int err = 0;
+
+	lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
+
+	if (sk->sk_type != SOCK_STREAM) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
+
+	BT_DBG("sk %p timeo %ld", sk, timeo);
+
+	/* Wait for an incoming connection. (wake-one). */
+	add_wait_queue_exclusive(sk_sleep(sk), &wait);
+	while (1) {
+		if (sk->sk_state != BT_LISTEN) {
+			err = -EBADFD;
+			break;
+		}
+
+		nsk = bt_accept_dequeue(sk, newsock);
+		if (nsk)
+			break;
+
+		if (!timeo) {
+			err = -EAGAIN;
+			break;
+		}
+
+		if (signal_pending(current)) {
+			err = sock_intr_errno(timeo);
+			break;
+		}
+
+		release_sock(sk);
+
+		timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
+
+		lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
+	}
+	remove_wait_queue(sk_sleep(sk), &wait);
+
+	if (err)
+		goto done;
+
+	newsock->state = SS_CONNECTED;
+
+	BT_DBG("new socket %p", nsk);
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static int rfcomm_sock_getname(struct socket *sock, struct sockaddr *addr, int peer)
+{
+	struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
+	struct sock *sk = sock->sk;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	if (peer && sk->sk_state != BT_CONNECTED &&
+	    sk->sk_state != BT_CONNECT && sk->sk_state != BT_CONNECT2)
+		return -ENOTCONN;
+
+	memset(sa, 0, sizeof(*sa));
+	sa->rc_family  = AF_BLUETOOTH;
+	sa->rc_channel = rfcomm_pi(sk)->channel;
+	if (peer)
+		bacpy(&sa->rc_bdaddr, &rfcomm_pi(sk)->dst);
+	else
+		bacpy(&sa->rc_bdaddr, &rfcomm_pi(sk)->src);
+
+	return sizeof(struct sockaddr_rc);
+}
+
+static int rfcomm_sock_sendmsg(struct socket *sock, struct msghdr *msg,
+			       size_t len)
+{
+	struct sock *sk = sock->sk;
+	struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
+	struct sk_buff *skb;
+	int sent;
+
+	if (test_bit(RFCOMM_DEFER_SETUP, &d->flags))
+		return -ENOTCONN;
+
+	if (msg->msg_flags & MSG_OOB)
+		return -EOPNOTSUPP;
+
+	if (sk->sk_shutdown & SEND_SHUTDOWN)
+		return -EPIPE;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	lock_sock(sk);
+
+	sent = bt_sock_wait_ready(sk, msg->msg_flags);
+
+	release_sock(sk);
+
+	if (sent)
+		return sent;
+
+	skb = bt_skb_sendmmsg(sk, msg, len, d->mtu, RFCOMM_SKB_HEAD_RESERVE,
+			      RFCOMM_SKB_TAIL_RESERVE);
+	if (IS_ERR(skb))
+		return PTR_ERR(skb);
+
+	sent = rfcomm_dlc_send(d, skb);
+	if (sent < 0)
+		kfree_skb(skb);
+
+	return sent;
+}
+
+static int rfcomm_sock_recvmsg(struct socket *sock, struct msghdr *msg,
+			       size_t size, int flags)
+{
+	struct sock *sk = sock->sk;
+	struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
+	int len;
+
+	if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) {
+		rfcomm_dlc_accept(d);
+		return 0;
+	}
+
+	len = bt_sock_stream_recvmsg(sock, msg, size, flags);
+
+	lock_sock(sk);
+	if (!(flags & MSG_PEEK) && len > 0)
+		atomic_sub(len, &sk->sk_rmem_alloc);
+
+	if (atomic_read(&sk->sk_rmem_alloc) <= (sk->sk_rcvbuf >> 2))
+		rfcomm_dlc_unthrottle(rfcomm_pi(sk)->dlc);
+	release_sock(sk);
+
+	return len;
+}
+
+static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname,
+		sockptr_t optval, unsigned int optlen)
+{
+	struct sock *sk = sock->sk;
+	int err = 0;
+	u32 opt;
+
+	BT_DBG("sk %p", sk);
+
+	lock_sock(sk);
+
+	switch (optname) {
+	case RFCOMM_LM:
+		if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (opt & RFCOMM_LM_FIPS) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (opt & RFCOMM_LM_AUTH)
+			rfcomm_pi(sk)->sec_level = BT_SECURITY_LOW;
+		if (opt & RFCOMM_LM_ENCRYPT)
+			rfcomm_pi(sk)->sec_level = BT_SECURITY_MEDIUM;
+		if (opt & RFCOMM_LM_SECURE)
+			rfcomm_pi(sk)->sec_level = BT_SECURITY_HIGH;
+
+		rfcomm_pi(sk)->role_switch = (opt & RFCOMM_LM_MASTER);
+		break;
+
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+	release_sock(sk);
+	return err;
+}
+
+static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname,
+		sockptr_t optval, unsigned int optlen)
+{
+	struct sock *sk = sock->sk;
+	struct bt_security sec;
+	int err = 0;
+	size_t len;
+	u32 opt;
+
+	BT_DBG("sk %p", sk);
+
+	if (level == SOL_RFCOMM)
+		return rfcomm_sock_setsockopt_old(sock, optname, optval, optlen);
+
+	if (level != SOL_BLUETOOTH)
+		return -ENOPROTOOPT;
+
+	lock_sock(sk);
+
+	switch (optname) {
+	case BT_SECURITY:
+		if (sk->sk_type != SOCK_STREAM) {
+			err = -EINVAL;
+			break;
+		}
+
+		sec.level = BT_SECURITY_LOW;
+
+		len = min_t(unsigned int, sizeof(sec), optlen);
+		if (copy_from_sockptr(&sec, optval, len)) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (sec.level > BT_SECURITY_HIGH) {
+			err = -EINVAL;
+			break;
+		}
+
+		rfcomm_pi(sk)->sec_level = sec.level;
+		break;
+
+	case BT_DEFER_SETUP:
+		if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (opt)
+			set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
+		else
+			clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
+
+		break;
+
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+	release_sock(sk);
+	return err;
+}
+
+static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen)
+{
+	struct sock *sk = sock->sk;
+	struct sock *l2cap_sk;
+	struct l2cap_conn *conn;
+	struct rfcomm_conninfo cinfo;
+	int len, err = 0;
+	u32 opt;
+
+	BT_DBG("sk %p", sk);
+
+	if (get_user(len, optlen))
+		return -EFAULT;
+
+	lock_sock(sk);
+
+	switch (optname) {
+	case RFCOMM_LM:
+		switch (rfcomm_pi(sk)->sec_level) {
+		case BT_SECURITY_LOW:
+			opt = RFCOMM_LM_AUTH;
+			break;
+		case BT_SECURITY_MEDIUM:
+			opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT;
+			break;
+		case BT_SECURITY_HIGH:
+			opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT |
+			      RFCOMM_LM_SECURE;
+			break;
+		case BT_SECURITY_FIPS:
+			opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT |
+			      RFCOMM_LM_SECURE | RFCOMM_LM_FIPS;
+			break;
+		default:
+			opt = 0;
+			break;
+		}
+
+		if (rfcomm_pi(sk)->role_switch)
+			opt |= RFCOMM_LM_MASTER;
+
+		if (put_user(opt, (u32 __user *) optval))
+			err = -EFAULT;
+
+		break;
+
+	case RFCOMM_CONNINFO:
+		if (sk->sk_state != BT_CONNECTED &&
+					!rfcomm_pi(sk)->dlc->defer_setup) {
+			err = -ENOTCONN;
+			break;
+		}
+
+		l2cap_sk = rfcomm_pi(sk)->dlc->session->sock->sk;
+		conn = l2cap_pi(l2cap_sk)->chan->conn;
+
+		memset(&cinfo, 0, sizeof(cinfo));
+		cinfo.hci_handle = conn->hcon->handle;
+		memcpy(cinfo.dev_class, conn->hcon->dev_class, 3);
+
+		len = min_t(unsigned int, len, sizeof(cinfo));
+		if (copy_to_user(optval, (char *) &cinfo, len))
+			err = -EFAULT;
+
+		break;
+
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+	release_sock(sk);
+	return err;
+}
+
+static int rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
+{
+	struct sock *sk = sock->sk;
+	struct bt_security sec;
+	int len, err = 0;
+
+	BT_DBG("sk %p", sk);
+
+	if (level == SOL_RFCOMM)
+		return rfcomm_sock_getsockopt_old(sock, optname, optval, optlen);
+
+	if (level != SOL_BLUETOOTH)
+		return -ENOPROTOOPT;
+
+	if (get_user(len, optlen))
+		return -EFAULT;
+
+	lock_sock(sk);
+
+	switch (optname) {
+	case BT_SECURITY:
+		if (sk->sk_type != SOCK_STREAM) {
+			err = -EINVAL;
+			break;
+		}
+
+		sec.level = rfcomm_pi(sk)->sec_level;
+		sec.key_size = 0;
+
+		len = min_t(unsigned int, len, sizeof(sec));
+		if (copy_to_user(optval, (char *) &sec, len))
+			err = -EFAULT;
+
+		break;
+
+	case BT_DEFER_SETUP:
+		if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
+			     (u32 __user *) optval))
+			err = -EFAULT;
+
+		break;
+
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+	release_sock(sk);
+	return err;
+}
+
+static int rfcomm_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+	struct sock *sk __maybe_unused = sock->sk;
+	int err;
+
+	BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);
+
+	err = bt_sock_ioctl(sock, cmd, arg);
+
+	if (err == -ENOIOCTLCMD) {
+#ifdef CONFIG_BT_RFCOMM_TTY
+		lock_sock(sk);
+		err = rfcomm_dev_ioctl(sk, cmd, (void __user *) arg);
+		release_sock(sk);
+#else
+		err = -EOPNOTSUPP;
+#endif
+	}
+
+	return err;
+}
+
+#ifdef CONFIG_COMPAT
+static int rfcomm_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+	return rfcomm_sock_ioctl(sock, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
+static int rfcomm_sock_shutdown(struct socket *sock, int how)
+{
+	struct sock *sk = sock->sk;
+	int err = 0;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	if (!sk)
+		return 0;
+
+	lock_sock(sk);
+	if (!sk->sk_shutdown) {
+		sk->sk_shutdown = SHUTDOWN_MASK;
+		__rfcomm_sock_close(sk);
+
+		if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
+		    !(current->flags & PF_EXITING))
+			err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
+	}
+	release_sock(sk);
+	return err;
+}
+
+static int rfcomm_sock_release(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+	int err;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	if (!sk)
+		return 0;
+
+	err = rfcomm_sock_shutdown(sock, 2);
+
+	sock_orphan(sk);
+	rfcomm_sock_kill(sk);
+	return err;
+}
+
+/* ---- RFCOMM core layer callbacks ----
+ *
+ * called under rfcomm_lock()
+ */
+int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc **d)
+{
+	struct sock *sk, *parent;
+	bdaddr_t src, dst;
+	int result = 0;
+
+	BT_DBG("session %p channel %d", s, channel);
+
+	rfcomm_session_getaddr(s, &src, &dst);
+
+	/* Check if we have socket listening on channel */
+	parent = rfcomm_get_sock_by_channel(BT_LISTEN, channel, &src);
+	if (!parent)
+		return 0;
+
+	bh_lock_sock(parent);
+
+	/* Check for backlog size */
+	if (sk_acceptq_is_full(parent)) {
+		BT_DBG("backlog full %d", parent->sk_ack_backlog);
+		goto done;
+	}
+
+	sk = rfcomm_sock_alloc(sock_net(parent), NULL, BTPROTO_RFCOMM, GFP_ATOMIC, 0);
+	if (!sk)
+		goto done;
+
+	bt_sock_reclassify_lock(sk, BTPROTO_RFCOMM);
+
+	rfcomm_sock_init(sk, parent);
+	bacpy(&rfcomm_pi(sk)->src, &src);
+	bacpy(&rfcomm_pi(sk)->dst, &dst);
+	rfcomm_pi(sk)->channel = channel;
+
+	sk->sk_state = BT_CONFIG;
+	bt_accept_enqueue(parent, sk, true);
+
+	/* Accept connection and return socket DLC */
+	*d = rfcomm_pi(sk)->dlc;
+	result = 1;
+
+done:
+	bh_unlock_sock(parent);
+
+	if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
+		parent->sk_state_change(parent);
+
+	return result;
+}
+
+static int rfcomm_sock_debugfs_show(struct seq_file *f, void *p)
+{
+	struct sock *sk;
+
+	read_lock(&rfcomm_sk_list.lock);
+
+	sk_for_each(sk, &rfcomm_sk_list.head) {
+		seq_printf(f, "%pMR %pMR %d %d\n",
+			   &rfcomm_pi(sk)->src, &rfcomm_pi(sk)->dst,
+			   sk->sk_state, rfcomm_pi(sk)->channel);
+	}
+
+	read_unlock(&rfcomm_sk_list.lock);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(rfcomm_sock_debugfs);
+
+static struct dentry *rfcomm_sock_debugfs;
+
+static const struct proto_ops rfcomm_sock_ops = {
+	.family		= PF_BLUETOOTH,
+	.owner		= THIS_MODULE,
+	.release	= rfcomm_sock_release,
+	.bind		= rfcomm_sock_bind,
+	.connect	= rfcomm_sock_connect,
+	.listen		= rfcomm_sock_listen,
+	.accept		= rfcomm_sock_accept,
+	.getname	= rfcomm_sock_getname,
+	.sendmsg	= rfcomm_sock_sendmsg,
+	.recvmsg	= rfcomm_sock_recvmsg,
+	.shutdown	= rfcomm_sock_shutdown,
+	.setsockopt	= rfcomm_sock_setsockopt,
+	.getsockopt	= rfcomm_sock_getsockopt,
+	.ioctl		= rfcomm_sock_ioctl,
+	.gettstamp	= sock_gettstamp,
+	.poll		= bt_sock_poll,
+	.socketpair	= sock_no_socketpair,
+	.mmap		= sock_no_mmap,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= rfcomm_sock_compat_ioctl,
+#endif
+};
+
+static const struct net_proto_family rfcomm_sock_family_ops = {
+	.family		= PF_BLUETOOTH,
+	.owner		= THIS_MODULE,
+	.create		= rfcomm_sock_create
+};
+
+int __init rfcomm_init_sockets(void)
+{
+	int err;
+
+	BUILD_BUG_ON(sizeof(struct sockaddr_rc) > sizeof(struct sockaddr));
+
+	err = proto_register(&rfcomm_proto, 0);
+	if (err < 0)
+		return err;
+
+	err = bt_sock_register(BTPROTO_RFCOMM, &rfcomm_sock_family_ops);
+	if (err < 0) {
+		BT_ERR("RFCOMM socket layer registration failed");
+		goto error;
+	}
+
+	err = bt_procfs_init(&init_net, "rfcomm", &rfcomm_sk_list, NULL);
+	if (err < 0) {
+		BT_ERR("Failed to create RFCOMM proc file");
+		bt_sock_unregister(BTPROTO_RFCOMM);
+		goto error;
+	}
+
+	BT_INFO("RFCOMM socket layer initialized");
+
+	if (IS_ERR_OR_NULL(bt_debugfs))
+		return 0;
+
+	rfcomm_sock_debugfs = debugfs_create_file("rfcomm", 0444,
+						  bt_debugfs, NULL,
+						  &rfcomm_sock_debugfs_fops);
+
+	return 0;
+
+error:
+	proto_unregister(&rfcomm_proto);
+	return err;
+}
+
+void __exit rfcomm_cleanup_sockets(void)
+{
+	bt_procfs_cleanup(&init_net, "rfcomm");
+
+	debugfs_remove(rfcomm_sock_debugfs);
+
+	bt_sock_unregister(BTPROTO_RFCOMM);
+
+	proto_unregister(&rfcomm_proto);
+}
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
new file mode 100644
index 000000000..a58584949
--- /dev/null
+++ b/net/bluetooth/rfcomm/tty.c
@@ -0,0 +1,1160 @@
+/*
+   RFCOMM implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
+   Copyright (C) 2002 Marcel Holtmann <marcel@holtmann.org>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/*
+ * RFCOMM TTY.
+ */
+
+#include <linux/module.h>
+
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/rfcomm.h>
+
+#define RFCOMM_TTY_MAGIC 0x6d02		/* magic number for rfcomm struct */
+#define RFCOMM_TTY_PORTS RFCOMM_MAX_DEV	/* whole lotta rfcomm devices */
+#define RFCOMM_TTY_MAJOR 216		/* device node major id of the usb/bluetooth.c driver */
+#define RFCOMM_TTY_MINOR 0
+
+static DEFINE_MUTEX(rfcomm_ioctl_mutex);
+static struct tty_driver *rfcomm_tty_driver;
+
+struct rfcomm_dev {
+	struct tty_port		port;
+	struct list_head	list;
+
+	char			name[12];
+	int			id;
+	unsigned long		flags;
+	int			err;
+
+	unsigned long		status;		/* don't export to userspace */
+
+	bdaddr_t		src;
+	bdaddr_t		dst;
+	u8			channel;
+
+	uint			modem_status;
+
+	struct rfcomm_dlc	*dlc;
+
+	struct device		*tty_dev;
+
+	atomic_t		wmem_alloc;
+
+	struct sk_buff_head	pending;
+};
+
+static LIST_HEAD(rfcomm_dev_list);
+static DEFINE_MUTEX(rfcomm_dev_lock);
+
+static void rfcomm_dev_data_ready(struct rfcomm_dlc *dlc, struct sk_buff *skb);
+static void rfcomm_dev_state_change(struct rfcomm_dlc *dlc, int err);
+static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig);
+
+/* ---- Device functions ---- */
+
+static void rfcomm_dev_destruct(struct tty_port *port)
+{
+	struct rfcomm_dev *dev = container_of(port, struct rfcomm_dev, port);
+	struct rfcomm_dlc *dlc = dev->dlc;
+
+	BT_DBG("dev %p dlc %p", dev, dlc);
+
+	rfcomm_dlc_lock(dlc);
+	/* Detach DLC if it's owned by this dev */
+	if (dlc->owner == dev)
+		dlc->owner = NULL;
+	rfcomm_dlc_unlock(dlc);
+
+	rfcomm_dlc_put(dlc);
+
+	if (dev->tty_dev)
+		tty_unregister_device(rfcomm_tty_driver, dev->id);
+
+	mutex_lock(&rfcomm_dev_lock);
+	list_del(&dev->list);
+	mutex_unlock(&rfcomm_dev_lock);
+
+	kfree(dev);
+
+	/* It's safe to call module_put() here because socket still
+	   holds reference to this module. */
+	module_put(THIS_MODULE);
+}
+
+/* device-specific initialization: open the dlc */
+static int rfcomm_dev_activate(struct tty_port *port, struct tty_struct *tty)
+{
+	struct rfcomm_dev *dev = container_of(port, struct rfcomm_dev, port);
+	int err;
+
+	err = rfcomm_dlc_open(dev->dlc, &dev->src, &dev->dst, dev->channel);
+	if (err)
+		set_bit(TTY_IO_ERROR, &tty->flags);
+	return err;
+}
+
+/* we block the open until the dlc->state becomes BT_CONNECTED */
+static int rfcomm_dev_carrier_raised(struct tty_port *port)
+{
+	struct rfcomm_dev *dev = container_of(port, struct rfcomm_dev, port);
+
+	return (dev->dlc->state == BT_CONNECTED);
+}
+
+/* device-specific cleanup: close the dlc */
+static void rfcomm_dev_shutdown(struct tty_port *port)
+{
+	struct rfcomm_dev *dev = container_of(port, struct rfcomm_dev, port);
+
+	if (dev->tty_dev->parent)
+		device_move(dev->tty_dev, NULL, DPM_ORDER_DEV_LAST);
+
+	/* close the dlc */
+	rfcomm_dlc_close(dev->dlc, 0);
+}
+
+static const struct tty_port_operations rfcomm_port_ops = {
+	.destruct = rfcomm_dev_destruct,
+	.activate = rfcomm_dev_activate,
+	.shutdown = rfcomm_dev_shutdown,
+	.carrier_raised = rfcomm_dev_carrier_raised,
+};
+
+static struct rfcomm_dev *__rfcomm_dev_lookup(int id)
+{
+	struct rfcomm_dev *dev;
+
+	list_for_each_entry(dev, &rfcomm_dev_list, list)
+		if (dev->id == id)
+			return dev;
+
+	return NULL;
+}
+
+static struct rfcomm_dev *rfcomm_dev_get(int id)
+{
+	struct rfcomm_dev *dev;
+
+	mutex_lock(&rfcomm_dev_lock);
+
+	dev = __rfcomm_dev_lookup(id);
+
+	if (dev && !tty_port_get(&dev->port))
+		dev = NULL;
+
+	mutex_unlock(&rfcomm_dev_lock);
+
+	return dev;
+}
+
+static void rfcomm_reparent_device(struct rfcomm_dev *dev)
+{
+	struct hci_dev *hdev;
+	struct hci_conn *conn;
+
+	hdev = hci_get_route(&dev->dst, &dev->src, BDADDR_BREDR);
+	if (!hdev)
+		return;
+
+	/* The lookup results are unsafe to access without the
+	 * hci device lock (FIXME: why is this not documented?)
+	 */
+	hci_dev_lock(hdev);
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &dev->dst);
+
+	/* Just because the acl link is in the hash table is no
+	 * guarantee the sysfs device has been added ...
+	 */
+	if (conn && device_is_registered(&conn->dev))
+		device_move(dev->tty_dev, &conn->dev, DPM_ORDER_DEV_AFTER_PARENT);
+
+	hci_dev_unlock(hdev);
+	hci_dev_put(hdev);
+}
+
+static ssize_t show_address(struct device *tty_dev, struct device_attribute *attr, char *buf)
+{
+	struct rfcomm_dev *dev = dev_get_drvdata(tty_dev);
+	return sprintf(buf, "%pMR\n", &dev->dst);
+}
+
+static ssize_t show_channel(struct device *tty_dev, struct device_attribute *attr, char *buf)
+{
+	struct rfcomm_dev *dev = dev_get_drvdata(tty_dev);
+	return sprintf(buf, "%d\n", dev->channel);
+}
+
+static DEVICE_ATTR(address, 0444, show_address, NULL);
+static DEVICE_ATTR(channel, 0444, show_channel, NULL);
+
+static struct rfcomm_dev *__rfcomm_dev_add(struct rfcomm_dev_req *req,
+					   struct rfcomm_dlc *dlc)
+{
+	struct rfcomm_dev *dev, *entry;
+	struct list_head *head = &rfcomm_dev_list;
+	int err = 0;
+
+	dev = kzalloc(sizeof(struct rfcomm_dev), GFP_KERNEL);
+	if (!dev)
+		return ERR_PTR(-ENOMEM);
+
+	mutex_lock(&rfcomm_dev_lock);
+
+	if (req->dev_id < 0) {
+		dev->id = 0;
+
+		list_for_each_entry(entry, &rfcomm_dev_list, list) {
+			if (entry->id != dev->id)
+				break;
+
+			dev->id++;
+			head = &entry->list;
+		}
+	} else {
+		dev->id = req->dev_id;
+
+		list_for_each_entry(entry, &rfcomm_dev_list, list) {
+			if (entry->id == dev->id) {
+				err = -EADDRINUSE;
+				goto out;
+			}
+
+			if (entry->id > dev->id - 1)
+				break;
+
+			head = &entry->list;
+		}
+	}
+
+	if ((dev->id < 0) || (dev->id > RFCOMM_MAX_DEV - 1)) {
+		err = -ENFILE;
+		goto out;
+	}
+
+	sprintf(dev->name, "rfcomm%d", dev->id);
+
+	list_add(&dev->list, head);
+
+	bacpy(&dev->src, &req->src);
+	bacpy(&dev->dst, &req->dst);
+	dev->channel = req->channel;
+
+	dev->flags = req->flags &
+		((1 << RFCOMM_RELEASE_ONHUP) | (1 << RFCOMM_REUSE_DLC));
+
+	tty_port_init(&dev->port);
+	dev->port.ops = &rfcomm_port_ops;
+
+	skb_queue_head_init(&dev->pending);
+
+	rfcomm_dlc_lock(dlc);
+
+	if (req->flags & (1 << RFCOMM_REUSE_DLC)) {
+		struct sock *sk = dlc->owner;
+		struct sk_buff *skb;
+
+		BUG_ON(!sk);
+
+		rfcomm_dlc_throttle(dlc);
+
+		while ((skb = skb_dequeue(&sk->sk_receive_queue))) {
+			skb_orphan(skb);
+			skb_queue_tail(&dev->pending, skb);
+			atomic_sub(skb->len, &sk->sk_rmem_alloc);
+		}
+	}
+
+	dlc->data_ready   = rfcomm_dev_data_ready;
+	dlc->state_change = rfcomm_dev_state_change;
+	dlc->modem_status = rfcomm_dev_modem_status;
+
+	dlc->owner = dev;
+	dev->dlc   = dlc;
+
+	rfcomm_dev_modem_status(dlc, dlc->remote_v24_sig);
+
+	rfcomm_dlc_unlock(dlc);
+
+	/* It's safe to call __module_get() here because socket already
+	   holds reference to this module. */
+	__module_get(THIS_MODULE);
+
+	mutex_unlock(&rfcomm_dev_lock);
+	return dev;
+
+out:
+	mutex_unlock(&rfcomm_dev_lock);
+	kfree(dev);
+	return ERR_PTR(err);
+}
+
+static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc)
+{
+	struct rfcomm_dev *dev;
+	struct device *tty;
+
+	BT_DBG("id %d channel %d", req->dev_id, req->channel);
+
+	dev = __rfcomm_dev_add(req, dlc);
+	if (IS_ERR(dev)) {
+		rfcomm_dlc_put(dlc);
+		return PTR_ERR(dev);
+	}
+
+	tty = tty_port_register_device(&dev->port, rfcomm_tty_driver,
+			dev->id, NULL);
+	if (IS_ERR(tty)) {
+		tty_port_put(&dev->port);
+		return PTR_ERR(tty);
+	}
+
+	dev->tty_dev = tty;
+	rfcomm_reparent_device(dev);
+	dev_set_drvdata(dev->tty_dev, dev);
+
+	if (device_create_file(dev->tty_dev, &dev_attr_address) < 0)
+		BT_ERR("Failed to create address attribute");
+
+	if (device_create_file(dev->tty_dev, &dev_attr_channel) < 0)
+		BT_ERR("Failed to create channel attribute");
+
+	return dev->id;
+}
+
+/* ---- Send buffer ---- */
+static inline unsigned int rfcomm_room(struct rfcomm_dev *dev)
+{
+	struct rfcomm_dlc *dlc = dev->dlc;
+
+	/* Limit the outstanding number of packets not yet sent to 40 */
+	int pending = 40 - atomic_read(&dev->wmem_alloc);
+
+	return max(0, pending) * dlc->mtu;
+}
+
+static void rfcomm_wfree(struct sk_buff *skb)
+{
+	struct rfcomm_dev *dev = (void *) skb->sk;
+	atomic_dec(&dev->wmem_alloc);
+	if (test_bit(RFCOMM_TTY_ATTACHED, &dev->flags))
+		tty_port_tty_wakeup(&dev->port);
+	tty_port_put(&dev->port);
+}
+
+static void rfcomm_set_owner_w(struct sk_buff *skb, struct rfcomm_dev *dev)
+{
+	tty_port_get(&dev->port);
+	atomic_inc(&dev->wmem_alloc);
+	skb->sk = (void *) dev;
+	skb->destructor = rfcomm_wfree;
+}
+
+static struct sk_buff *rfcomm_wmalloc(struct rfcomm_dev *dev, unsigned long size, gfp_t priority)
+{
+	struct sk_buff *skb = alloc_skb(size, priority);
+	if (skb)
+		rfcomm_set_owner_w(skb, dev);
+	return skb;
+}
+
+/* ---- Device IOCTLs ---- */
+
+#define NOCAP_FLAGS ((1 << RFCOMM_REUSE_DLC) | (1 << RFCOMM_RELEASE_ONHUP))
+
+static int __rfcomm_create_dev(struct sock *sk, void __user *arg)
+{
+	struct rfcomm_dev_req req;
+	struct rfcomm_dlc *dlc;
+	int id;
+
+	if (copy_from_user(&req, arg, sizeof(req)))
+		return -EFAULT;
+
+	BT_DBG("sk %p dev_id %d flags 0x%x", sk, req.dev_id, req.flags);
+
+	if (req.flags != NOCAP_FLAGS && !capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	if (req.flags & (1 << RFCOMM_REUSE_DLC)) {
+		/* Socket must be connected */
+		if (sk->sk_state != BT_CONNECTED)
+			return -EBADFD;
+
+		dlc = rfcomm_pi(sk)->dlc;
+		rfcomm_dlc_hold(dlc);
+	} else {
+		/* Validate the channel is unused */
+		dlc = rfcomm_dlc_exists(&req.src, &req.dst, req.channel);
+		if (IS_ERR(dlc))
+			return PTR_ERR(dlc);
+		if (dlc)
+			return -EBUSY;
+		dlc = rfcomm_dlc_alloc(GFP_KERNEL);
+		if (!dlc)
+			return -ENOMEM;
+	}
+
+	id = rfcomm_dev_add(&req, dlc);
+	if (id < 0)
+		return id;
+
+	if (req.flags & (1 << RFCOMM_REUSE_DLC)) {
+		/* DLC is now used by device.
+		 * Socket must be disconnected */
+		sk->sk_state = BT_CLOSED;
+	}
+
+	return id;
+}
+
+static int __rfcomm_release_dev(void __user *arg)
+{
+	struct rfcomm_dev_req req;
+	struct rfcomm_dev *dev;
+	struct tty_struct *tty;
+
+	if (copy_from_user(&req, arg, sizeof(req)))
+		return -EFAULT;
+
+	BT_DBG("dev_id %d flags 0x%x", req.dev_id, req.flags);
+
+	dev = rfcomm_dev_get(req.dev_id);
+	if (!dev)
+		return -ENODEV;
+
+	if (dev->flags != NOCAP_FLAGS && !capable(CAP_NET_ADMIN)) {
+		tty_port_put(&dev->port);
+		return -EPERM;
+	}
+
+	/* only release once */
+	if (test_and_set_bit(RFCOMM_DEV_RELEASED, &dev->status)) {
+		tty_port_put(&dev->port);
+		return -EALREADY;
+	}
+
+	if (req.flags & (1 << RFCOMM_HANGUP_NOW))
+		rfcomm_dlc_close(dev->dlc, 0);
+
+	/* Shut down TTY synchronously before freeing rfcomm_dev */
+	tty = tty_port_tty_get(&dev->port);
+	if (tty) {
+		tty_vhangup(tty);
+		tty_kref_put(tty);
+	}
+
+	if (!test_bit(RFCOMM_TTY_OWNED, &dev->status))
+		tty_port_put(&dev->port);
+
+	tty_port_put(&dev->port);
+	return 0;
+}
+
+static int rfcomm_create_dev(struct sock *sk, void __user *arg)
+{
+	int ret;
+
+	mutex_lock(&rfcomm_ioctl_mutex);
+	ret = __rfcomm_create_dev(sk, arg);
+	mutex_unlock(&rfcomm_ioctl_mutex);
+
+	return ret;
+}
+
+static int rfcomm_release_dev(void __user *arg)
+{
+	int ret;
+
+	mutex_lock(&rfcomm_ioctl_mutex);
+	ret = __rfcomm_release_dev(arg);
+	mutex_unlock(&rfcomm_ioctl_mutex);
+
+	return ret;
+}
+
+static int rfcomm_get_dev_list(void __user *arg)
+{
+	struct rfcomm_dev *dev;
+	struct rfcomm_dev_list_req *dl;
+	struct rfcomm_dev_info *di;
+	int n = 0, size, err;
+	u16 dev_num;
+
+	BT_DBG("");
+
+	if (get_user(dev_num, (u16 __user *) arg))
+		return -EFAULT;
+
+	if (!dev_num || dev_num > (PAGE_SIZE * 4) / sizeof(*di))
+		return -EINVAL;
+
+	size = sizeof(*dl) + dev_num * sizeof(*di);
+
+	dl = kzalloc(size, GFP_KERNEL);
+	if (!dl)
+		return -ENOMEM;
+
+	di = dl->dev_info;
+
+	mutex_lock(&rfcomm_dev_lock);
+
+	list_for_each_entry(dev, &rfcomm_dev_list, list) {
+		if (!tty_port_get(&dev->port))
+			continue;
+		(di + n)->id      = dev->id;
+		(di + n)->flags   = dev->flags;
+		(di + n)->state   = dev->dlc->state;
+		(di + n)->channel = dev->channel;
+		bacpy(&(di + n)->src, &dev->src);
+		bacpy(&(di + n)->dst, &dev->dst);
+		tty_port_put(&dev->port);
+		if (++n >= dev_num)
+			break;
+	}
+
+	mutex_unlock(&rfcomm_dev_lock);
+
+	dl->dev_num = n;
+	size = sizeof(*dl) + n * sizeof(*di);
+
+	err = copy_to_user(arg, dl, size);
+	kfree(dl);
+
+	return err ? -EFAULT : 0;
+}
+
+static int rfcomm_get_dev_info(void __user *arg)
+{
+	struct rfcomm_dev *dev;
+	struct rfcomm_dev_info di;
+	int err = 0;
+
+	BT_DBG("");
+
+	if (copy_from_user(&di, arg, sizeof(di)))
+		return -EFAULT;
+
+	dev = rfcomm_dev_get(di.id);
+	if (!dev)
+		return -ENODEV;
+
+	di.flags   = dev->flags;
+	di.channel = dev->channel;
+	di.state   = dev->dlc->state;
+	bacpy(&di.src, &dev->src);
+	bacpy(&di.dst, &dev->dst);
+
+	if (copy_to_user(arg, &di, sizeof(di)))
+		err = -EFAULT;
+
+	tty_port_put(&dev->port);
+	return err;
+}
+
+int rfcomm_dev_ioctl(struct sock *sk, unsigned int cmd, void __user *arg)
+{
+	BT_DBG("cmd %d arg %p", cmd, arg);
+
+	switch (cmd) {
+	case RFCOMMCREATEDEV:
+		return rfcomm_create_dev(sk, arg);
+
+	case RFCOMMRELEASEDEV:
+		return rfcomm_release_dev(arg);
+
+	case RFCOMMGETDEVLIST:
+		return rfcomm_get_dev_list(arg);
+
+	case RFCOMMGETDEVINFO:
+		return rfcomm_get_dev_info(arg);
+	}
+
+	return -EINVAL;
+}
+
+/* ---- DLC callbacks ---- */
+static void rfcomm_dev_data_ready(struct rfcomm_dlc *dlc, struct sk_buff *skb)
+{
+	struct rfcomm_dev *dev = dlc->owner;
+
+	if (!dev) {
+		kfree_skb(skb);
+		return;
+	}
+
+	if (!skb_queue_empty(&dev->pending)) {
+		skb_queue_tail(&dev->pending, skb);
+		return;
+	}
+
+	BT_DBG("dlc %p len %d", dlc, skb->len);
+
+	tty_insert_flip_string(&dev->port, skb->data, skb->len);
+	tty_flip_buffer_push(&dev->port);
+
+	kfree_skb(skb);
+}
+
+static void rfcomm_dev_state_change(struct rfcomm_dlc *dlc, int err)
+{
+	struct rfcomm_dev *dev = dlc->owner;
+	if (!dev)
+		return;
+
+	BT_DBG("dlc %p dev %p err %d", dlc, dev, err);
+
+	dev->err = err;
+	if (dlc->state == BT_CONNECTED) {
+		rfcomm_reparent_device(dev);
+
+		wake_up_interruptible(&dev->port.open_wait);
+	} else if (dlc->state == BT_CLOSED)
+		tty_port_tty_hangup(&dev->port, false);
+}
+
+static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig)
+{
+	struct rfcomm_dev *dev = dlc->owner;
+	if (!dev)
+		return;
+
+	BT_DBG("dlc %p dev %p v24_sig 0x%02x", dlc, dev, v24_sig);
+
+	if ((dev->modem_status & TIOCM_CD) && !(v24_sig & RFCOMM_V24_DV))
+		tty_port_tty_hangup(&dev->port, true);
+
+	dev->modem_status =
+		((v24_sig & RFCOMM_V24_RTC) ? (TIOCM_DSR | TIOCM_DTR) : 0) |
+		((v24_sig & RFCOMM_V24_RTR) ? (TIOCM_RTS | TIOCM_CTS) : 0) |
+		((v24_sig & RFCOMM_V24_IC)  ? TIOCM_RI : 0) |
+		((v24_sig & RFCOMM_V24_DV)  ? TIOCM_CD : 0);
+}
+
+/* ---- TTY functions ---- */
+static void rfcomm_tty_copy_pending(struct rfcomm_dev *dev)
+{
+	struct sk_buff *skb;
+	int inserted = 0;
+
+	BT_DBG("dev %p", dev);
+
+	rfcomm_dlc_lock(dev->dlc);
+
+	while ((skb = skb_dequeue(&dev->pending))) {
+		inserted += tty_insert_flip_string(&dev->port, skb->data,
+				skb->len);
+		kfree_skb(skb);
+	}
+
+	rfcomm_dlc_unlock(dev->dlc);
+
+	if (inserted > 0)
+		tty_flip_buffer_push(&dev->port);
+}
+
+/* do the reverse of install, clearing the tty fields and releasing the
+ * reference to tty_port
+ */
+static void rfcomm_tty_cleanup(struct tty_struct *tty)
+{
+	struct rfcomm_dev *dev = tty->driver_data;
+
+	clear_bit(RFCOMM_TTY_ATTACHED, &dev->flags);
+
+	rfcomm_dlc_lock(dev->dlc);
+	tty->driver_data = NULL;
+	rfcomm_dlc_unlock(dev->dlc);
+
+	/*
+	 * purge the dlc->tx_queue to avoid circular dependencies
+	 * between dev and dlc
+	 */
+	skb_queue_purge(&dev->dlc->tx_queue);
+
+	tty_port_put(&dev->port);
+}
+
+/* we acquire the tty_port reference since it's here the tty is first used
+ * by setting the termios. We also populate the driver_data field and install
+ * the tty port
+ */
+static int rfcomm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
+{
+	struct rfcomm_dev *dev;
+	struct rfcomm_dlc *dlc;
+	int err;
+
+	dev = rfcomm_dev_get(tty->index);
+	if (!dev)
+		return -ENODEV;
+
+	dlc = dev->dlc;
+
+	/* Attach TTY and open DLC */
+	rfcomm_dlc_lock(dlc);
+	tty->driver_data = dev;
+	rfcomm_dlc_unlock(dlc);
+	set_bit(RFCOMM_TTY_ATTACHED, &dev->flags);
+
+	/* install the tty_port */
+	err = tty_port_install(&dev->port, driver, tty);
+	if (err) {
+		rfcomm_tty_cleanup(tty);
+		return err;
+	}
+
+	/* take over the tty_port reference if the port was created with the
+	 * flag RFCOMM_RELEASE_ONHUP. This will force the release of the port
+	 * when the last process closes the tty. The behaviour is expected by
+	 * userspace.
+	 */
+	if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags)) {
+		set_bit(RFCOMM_TTY_OWNED, &dev->status);
+		tty_port_put(&dev->port);
+	}
+
+	return 0;
+}
+
+static int rfcomm_tty_open(struct tty_struct *tty, struct file *filp)
+{
+	struct rfcomm_dev *dev = tty->driver_data;
+	int err;
+
+	BT_DBG("tty %p id %d", tty, tty->index);
+
+	BT_DBG("dev %p dst %pMR channel %d opened %d", dev, &dev->dst,
+	       dev->channel, dev->port.count);
+
+	err = tty_port_open(&dev->port, tty, filp);
+	if (err)
+		return err;
+
+	/*
+	 * FIXME: rfcomm should use proper flow control for
+	 * received data. This hack will be unnecessary and can
+	 * be removed when that's implemented
+	 */
+	rfcomm_tty_copy_pending(dev);
+
+	rfcomm_dlc_unthrottle(dev->dlc);
+
+	return 0;
+}
+
+static void rfcomm_tty_close(struct tty_struct *tty, struct file *filp)
+{
+	struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
+
+	BT_DBG("tty %p dev %p dlc %p opened %d", tty, dev, dev->dlc,
+						dev->port.count);
+
+	tty_port_close(&dev->port, tty, filp);
+}
+
+static int rfcomm_tty_write(struct tty_struct *tty, const unsigned char *buf, int count)
+{
+	struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
+	struct rfcomm_dlc *dlc = dev->dlc;
+	struct sk_buff *skb;
+	int sent = 0, size;
+
+	BT_DBG("tty %p count %d", tty, count);
+
+	while (count) {
+		size = min_t(uint, count, dlc->mtu);
+
+		skb = rfcomm_wmalloc(dev, size + RFCOMM_SKB_RESERVE, GFP_ATOMIC);
+		if (!skb)
+			break;
+
+		skb_reserve(skb, RFCOMM_SKB_HEAD_RESERVE);
+
+		skb_put_data(skb, buf + sent, size);
+
+		rfcomm_dlc_send_noerror(dlc, skb);
+
+		sent  += size;
+		count -= size;
+	}
+
+	return sent;
+}
+
+static int rfcomm_tty_write_room(struct tty_struct *tty)
+{
+	struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
+	int room = 0;
+
+	if (dev && dev->dlc)
+		room = rfcomm_room(dev);
+
+	BT_DBG("tty %p room %d", tty, room);
+
+	return room;
+}
+
+static int rfcomm_tty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
+{
+	BT_DBG("tty %p cmd 0x%02x", tty, cmd);
+
+	switch (cmd) {
+	case TCGETS:
+		BT_DBG("TCGETS is not supported");
+		return -ENOIOCTLCMD;
+
+	case TCSETS:
+		BT_DBG("TCSETS is not supported");
+		return -ENOIOCTLCMD;
+
+	case TIOCMIWAIT:
+		BT_DBG("TIOCMIWAIT");
+		break;
+
+	case TIOCSERGETLSR:
+		BT_ERR("TIOCSERGETLSR is not supported");
+		return -ENOIOCTLCMD;
+
+	case TIOCSERCONFIG:
+		BT_ERR("TIOCSERCONFIG is not supported");
+		return -ENOIOCTLCMD;
+
+	default:
+		return -ENOIOCTLCMD;	/* ioctls which we must ignore */
+
+	}
+
+	return -ENOIOCTLCMD;
+}
+
+static void rfcomm_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
+{
+	struct ktermios *new = &tty->termios;
+	int old_baud_rate = tty_termios_baud_rate(old);
+	int new_baud_rate = tty_termios_baud_rate(new);
+
+	u8 baud, data_bits, stop_bits, parity, x_on, x_off;
+	u16 changes = 0;
+
+	struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
+
+	BT_DBG("tty %p termios %p", tty, old);
+
+	if (!dev || !dev->dlc || !dev->dlc->session)
+		return;
+
+	/* Handle turning off CRTSCTS */
+	if ((old->c_cflag & CRTSCTS) && !(new->c_cflag & CRTSCTS))
+		BT_DBG("Turning off CRTSCTS unsupported");
+
+	/* Parity on/off and when on, odd/even */
+	if (((old->c_cflag & PARENB) != (new->c_cflag & PARENB)) ||
+			((old->c_cflag & PARODD) != (new->c_cflag & PARODD))) {
+		changes |= RFCOMM_RPN_PM_PARITY;
+		BT_DBG("Parity change detected.");
+	}
+
+	/* Mark and space parity are not supported! */
+	if (new->c_cflag & PARENB) {
+		if (new->c_cflag & PARODD) {
+			BT_DBG("Parity is ODD");
+			parity = RFCOMM_RPN_PARITY_ODD;
+		} else {
+			BT_DBG("Parity is EVEN");
+			parity = RFCOMM_RPN_PARITY_EVEN;
+		}
+	} else {
+		BT_DBG("Parity is OFF");
+		parity = RFCOMM_RPN_PARITY_NONE;
+	}
+
+	/* Setting the x_on / x_off characters */
+	if (old->c_cc[VSTOP] != new->c_cc[VSTOP]) {
+		BT_DBG("XOFF custom");
+		x_on = new->c_cc[VSTOP];
+		changes |= RFCOMM_RPN_PM_XON;
+	} else {
+		BT_DBG("XOFF default");
+		x_on = RFCOMM_RPN_XON_CHAR;
+	}
+
+	if (old->c_cc[VSTART] != new->c_cc[VSTART]) {
+		BT_DBG("XON custom");
+		x_off = new->c_cc[VSTART];
+		changes |= RFCOMM_RPN_PM_XOFF;
+	} else {
+		BT_DBG("XON default");
+		x_off = RFCOMM_RPN_XOFF_CHAR;
+	}
+
+	/* Handle setting of stop bits */
+	if ((old->c_cflag & CSTOPB) != (new->c_cflag & CSTOPB))
+		changes |= RFCOMM_RPN_PM_STOP;
+
+	/* POSIX does not support 1.5 stop bits and RFCOMM does not
+	 * support 2 stop bits. So a request for 2 stop bits gets
+	 * translated to 1.5 stop bits */
+	if (new->c_cflag & CSTOPB)
+		stop_bits = RFCOMM_RPN_STOP_15;
+	else
+		stop_bits = RFCOMM_RPN_STOP_1;
+
+	/* Handle number of data bits [5-8] */
+	if ((old->c_cflag & CSIZE) != (new->c_cflag & CSIZE))
+		changes |= RFCOMM_RPN_PM_DATA;
+
+	switch (new->c_cflag & CSIZE) {
+	case CS5:
+		data_bits = RFCOMM_RPN_DATA_5;
+		break;
+	case CS6:
+		data_bits = RFCOMM_RPN_DATA_6;
+		break;
+	case CS7:
+		data_bits = RFCOMM_RPN_DATA_7;
+		break;
+	case CS8:
+		data_bits = RFCOMM_RPN_DATA_8;
+		break;
+	default:
+		data_bits = RFCOMM_RPN_DATA_8;
+		break;
+	}
+
+	/* Handle baudrate settings */
+	if (old_baud_rate != new_baud_rate)
+		changes |= RFCOMM_RPN_PM_BITRATE;
+
+	switch (new_baud_rate) {
+	case 2400:
+		baud = RFCOMM_RPN_BR_2400;
+		break;
+	case 4800:
+		baud = RFCOMM_RPN_BR_4800;
+		break;
+	case 7200:
+		baud = RFCOMM_RPN_BR_7200;
+		break;
+	case 9600:
+		baud = RFCOMM_RPN_BR_9600;
+		break;
+	case 19200:
+		baud = RFCOMM_RPN_BR_19200;
+		break;
+	case 38400:
+		baud = RFCOMM_RPN_BR_38400;
+		break;
+	case 57600:
+		baud = RFCOMM_RPN_BR_57600;
+		break;
+	case 115200:
+		baud = RFCOMM_RPN_BR_115200;
+		break;
+	case 230400:
+		baud = RFCOMM_RPN_BR_230400;
+		break;
+	default:
+		/* 9600 is standard accordinag to the RFCOMM specification */
+		baud = RFCOMM_RPN_BR_9600;
+		break;
+
+	}
+
+	if (changes)
+		rfcomm_send_rpn(dev->dlc->session, 1, dev->dlc->dlci, baud,
+				data_bits, stop_bits, parity,
+				RFCOMM_RPN_FLOW_NONE, x_on, x_off, changes);
+}
+
+static void rfcomm_tty_throttle(struct tty_struct *tty)
+{
+	struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
+
+	BT_DBG("tty %p dev %p", tty, dev);
+
+	rfcomm_dlc_throttle(dev->dlc);
+}
+
+static void rfcomm_tty_unthrottle(struct tty_struct *tty)
+{
+	struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
+
+	BT_DBG("tty %p dev %p", tty, dev);
+
+	rfcomm_dlc_unthrottle(dev->dlc);
+}
+
+static int rfcomm_tty_chars_in_buffer(struct tty_struct *tty)
+{
+	struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
+
+	BT_DBG("tty %p dev %p", tty, dev);
+
+	if (!dev || !dev->dlc)
+		return 0;
+
+	if (!skb_queue_empty(&dev->dlc->tx_queue))
+		return dev->dlc->mtu;
+
+	return 0;
+}
+
+static void rfcomm_tty_flush_buffer(struct tty_struct *tty)
+{
+	struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
+
+	BT_DBG("tty %p dev %p", tty, dev);
+
+	if (!dev || !dev->dlc)
+		return;
+
+	skb_queue_purge(&dev->dlc->tx_queue);
+	tty_wakeup(tty);
+}
+
+static void rfcomm_tty_send_xchar(struct tty_struct *tty, char ch)
+{
+	BT_DBG("tty %p ch %c", tty, ch);
+}
+
+static void rfcomm_tty_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+	BT_DBG("tty %p timeout %d", tty, timeout);
+}
+
+static void rfcomm_tty_hangup(struct tty_struct *tty)
+{
+	struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
+
+	BT_DBG("tty %p dev %p", tty, dev);
+
+	tty_port_hangup(&dev->port);
+}
+
+static int rfcomm_tty_tiocmget(struct tty_struct *tty)
+{
+	struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
+
+	BT_DBG("tty %p dev %p", tty, dev);
+
+	return dev->modem_status;
+}
+
+static int rfcomm_tty_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear)
+{
+	struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
+	struct rfcomm_dlc *dlc = dev->dlc;
+	u8 v24_sig;
+
+	BT_DBG("tty %p dev %p set 0x%02x clear 0x%02x", tty, dev, set, clear);
+
+	rfcomm_dlc_get_modem_status(dlc, &v24_sig);
+
+	if (set & TIOCM_DSR || set & TIOCM_DTR)
+		v24_sig |= RFCOMM_V24_RTC;
+	if (set & TIOCM_RTS || set & TIOCM_CTS)
+		v24_sig |= RFCOMM_V24_RTR;
+	if (set & TIOCM_RI)
+		v24_sig |= RFCOMM_V24_IC;
+	if (set & TIOCM_CD)
+		v24_sig |= RFCOMM_V24_DV;
+
+	if (clear & TIOCM_DSR || clear & TIOCM_DTR)
+		v24_sig &= ~RFCOMM_V24_RTC;
+	if (clear & TIOCM_RTS || clear & TIOCM_CTS)
+		v24_sig &= ~RFCOMM_V24_RTR;
+	if (clear & TIOCM_RI)
+		v24_sig &= ~RFCOMM_V24_IC;
+	if (clear & TIOCM_CD)
+		v24_sig &= ~RFCOMM_V24_DV;
+
+	rfcomm_dlc_set_modem_status(dlc, v24_sig);
+
+	return 0;
+}
+
+/* ---- TTY structure ---- */
+
+static const struct tty_operations rfcomm_ops = {
+	.open			= rfcomm_tty_open,
+	.close			= rfcomm_tty_close,
+	.write			= rfcomm_tty_write,
+	.write_room		= rfcomm_tty_write_room,
+	.chars_in_buffer	= rfcomm_tty_chars_in_buffer,
+	.flush_buffer		= rfcomm_tty_flush_buffer,
+	.ioctl			= rfcomm_tty_ioctl,
+	.throttle		= rfcomm_tty_throttle,
+	.unthrottle		= rfcomm_tty_unthrottle,
+	.set_termios		= rfcomm_tty_set_termios,
+	.send_xchar		= rfcomm_tty_send_xchar,
+	.hangup			= rfcomm_tty_hangup,
+	.wait_until_sent	= rfcomm_tty_wait_until_sent,
+	.tiocmget		= rfcomm_tty_tiocmget,
+	.tiocmset		= rfcomm_tty_tiocmset,
+	.install                = rfcomm_tty_install,
+	.cleanup                = rfcomm_tty_cleanup,
+};
+
+int __init rfcomm_init_ttys(void)
+{
+	int error;
+
+	rfcomm_tty_driver = alloc_tty_driver(RFCOMM_TTY_PORTS);
+	if (!rfcomm_tty_driver)
+		return -ENOMEM;
+
+	rfcomm_tty_driver->driver_name	= "rfcomm";
+	rfcomm_tty_driver->name		= "rfcomm";
+	rfcomm_tty_driver->major	= RFCOMM_TTY_MAJOR;
+	rfcomm_tty_driver->minor_start	= RFCOMM_TTY_MINOR;
+	rfcomm_tty_driver->type		= TTY_DRIVER_TYPE_SERIAL;
+	rfcomm_tty_driver->subtype	= SERIAL_TYPE_NORMAL;
+	rfcomm_tty_driver->flags	= TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+	rfcomm_tty_driver->init_termios	= tty_std_termios;
+	rfcomm_tty_driver->init_termios.c_cflag	= B9600 | CS8 | CREAD | HUPCL;
+	rfcomm_tty_driver->init_termios.c_lflag &= ~ICANON;
+	tty_set_operations(rfcomm_tty_driver, &rfcomm_ops);
+
+	error = tty_register_driver(rfcomm_tty_driver);
+	if (error) {
+		BT_ERR("Can't register RFCOMM TTY driver");
+		put_tty_driver(rfcomm_tty_driver);
+		return error;
+	}
+
+	BT_INFO("RFCOMM TTY layer initialized");
+
+	return 0;
+}
+
+void rfcomm_cleanup_ttys(void)
+{
+	tty_unregister_driver(rfcomm_tty_driver);
+	put_tty_driver(rfcomm_tty_driver);
+}
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
new file mode 100644
index 000000000..8244d3ae1
--- /dev/null
+++ b/net/bluetooth/sco.c
@@ -0,0 +1,1336 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2000-2001 Qualcomm Incorporated
+
+   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth SCO sockets. */
+
+#include <linux/module.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/sched/signal.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/sco.h>
+
+static bool disable_esco;
+
+static const struct proto_ops sco_sock_ops;
+
+static struct bt_sock_list sco_sk_list = {
+	.lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock)
+};
+
+/* ---- SCO connections ---- */
+struct sco_conn {
+	struct hci_conn	*hcon;
+
+	spinlock_t	lock;
+	struct sock	*sk;
+
+	struct delayed_work	timeout_work;
+
+	unsigned int    mtu;
+};
+
+#define sco_conn_lock(c)	spin_lock(&c->lock);
+#define sco_conn_unlock(c)	spin_unlock(&c->lock);
+
+static void sco_sock_close(struct sock *sk);
+static void sco_sock_kill(struct sock *sk);
+
+/* ----- SCO socket info ----- */
+#define sco_pi(sk) ((struct sco_pinfo *) sk)
+
+struct sco_pinfo {
+	struct bt_sock	bt;
+	bdaddr_t	src;
+	bdaddr_t	dst;
+	__u32		flags;
+	__u16		setting;
+	__u8		cmsg_mask;
+	struct sco_conn	*conn;
+};
+
+/* ---- SCO timers ---- */
+#define SCO_CONN_TIMEOUT	(HZ * 40)
+#define SCO_DISCONN_TIMEOUT	(HZ * 2)
+
+static void sco_sock_timeout(struct work_struct *work)
+{
+	struct sco_conn *conn = container_of(work, struct sco_conn,
+					     timeout_work.work);
+	struct sock *sk;
+
+	sco_conn_lock(conn);
+	sk = conn->sk;
+	if (sk)
+		sock_hold(sk);
+	sco_conn_unlock(conn);
+
+	if (!sk)
+		return;
+
+	BT_DBG("sock %p state %d", sk, sk->sk_state);
+
+	bh_lock_sock(sk);
+	sk->sk_err = ETIMEDOUT;
+	sk->sk_state_change(sk);
+	bh_unlock_sock(sk);
+
+	sock_put(sk);
+}
+
+static void sco_sock_set_timer(struct sock *sk, long timeout)
+{
+	if (!sco_pi(sk)->conn)
+		return;
+
+	BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
+	cancel_delayed_work(&sco_pi(sk)->conn->timeout_work);
+	schedule_delayed_work(&sco_pi(sk)->conn->timeout_work, timeout);
+}
+
+static void sco_sock_clear_timer(struct sock *sk)
+{
+	if (!sco_pi(sk)->conn)
+		return;
+
+	BT_DBG("sock %p state %d", sk, sk->sk_state);
+	cancel_delayed_work(&sco_pi(sk)->conn->timeout_work);
+}
+
+/* ---- SCO connections ---- */
+static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
+{
+	struct hci_dev *hdev = hcon->hdev;
+	struct sco_conn *conn = hcon->sco_data;
+
+	if (conn)
+		return conn;
+
+	conn = kzalloc(sizeof(struct sco_conn), GFP_KERNEL);
+	if (!conn)
+		return NULL;
+
+	spin_lock_init(&conn->lock);
+	INIT_DELAYED_WORK(&conn->timeout_work, sco_sock_timeout);
+
+	hcon->sco_data = conn;
+	conn->hcon = hcon;
+
+	if (hdev->sco_mtu > 0)
+		conn->mtu = hdev->sco_mtu;
+	else
+		conn->mtu = 60;
+
+	BT_DBG("hcon %p conn %p", hcon, conn);
+
+	return conn;
+}
+
+/* Delete channel.
+ * Must be called on the locked socket. */
+static void sco_chan_del(struct sock *sk, int err)
+{
+	struct sco_conn *conn;
+
+	conn = sco_pi(sk)->conn;
+
+	BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
+
+	if (conn) {
+		sco_conn_lock(conn);
+		conn->sk = NULL;
+		sco_pi(sk)->conn = NULL;
+		sco_conn_unlock(conn);
+
+		if (conn->hcon)
+			hci_conn_drop(conn->hcon);
+	}
+
+	sk->sk_state = BT_CLOSED;
+	sk->sk_err   = err;
+	sk->sk_state_change(sk);
+
+	sock_set_flag(sk, SOCK_ZAPPED);
+}
+
+static void sco_conn_del(struct hci_conn *hcon, int err)
+{
+	struct sco_conn *conn = hcon->sco_data;
+	struct sock *sk;
+
+	if (!conn)
+		return;
+
+	BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
+
+	/* Kill socket */
+	sco_conn_lock(conn);
+	sk = conn->sk;
+	sco_conn_unlock(conn);
+
+	if (sk) {
+		sock_hold(sk);
+		bh_lock_sock(sk);
+		sco_sock_clear_timer(sk);
+		sco_chan_del(sk, err);
+		bh_unlock_sock(sk);
+		sock_put(sk);
+	}
+
+	/* Ensure no more work items will run before freeing conn. */
+	cancel_delayed_work_sync(&conn->timeout_work);
+
+	hcon->sco_data = NULL;
+	kfree(conn);
+}
+
+static void __sco_chan_add(struct sco_conn *conn, struct sock *sk,
+			   struct sock *parent)
+{
+	BT_DBG("conn %p", conn);
+
+	sco_pi(sk)->conn = conn;
+	conn->sk = sk;
+
+	if (parent)
+		bt_accept_enqueue(parent, sk, true);
+}
+
+static int sco_chan_add(struct sco_conn *conn, struct sock *sk,
+			struct sock *parent)
+{
+	int err = 0;
+
+	sco_conn_lock(conn);
+	if (conn->sk)
+		err = -EBUSY;
+	else
+		__sco_chan_add(conn, sk, parent);
+
+	sco_conn_unlock(conn);
+	return err;
+}
+
+static int sco_connect(struct hci_dev *hdev, struct sock *sk)
+{
+	struct sco_conn *conn;
+	struct hci_conn *hcon;
+	int err, type;
+
+	BT_DBG("%pMR -> %pMR", &sco_pi(sk)->src, &sco_pi(sk)->dst);
+
+	if (lmp_esco_capable(hdev) && !disable_esco)
+		type = ESCO_LINK;
+	else
+		type = SCO_LINK;
+
+	if (sco_pi(sk)->setting == BT_VOICE_TRANSPARENT &&
+	    (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev)))
+		return -EOPNOTSUPP;
+
+	hcon = hci_connect_sco(hdev, type, &sco_pi(sk)->dst,
+			       sco_pi(sk)->setting);
+	if (IS_ERR(hcon))
+		return PTR_ERR(hcon);
+
+	conn = sco_conn_add(hcon);
+	if (!conn) {
+		hci_conn_drop(hcon);
+		return -ENOMEM;
+	}
+
+	/* Update source addr of the socket */
+	bacpy(&sco_pi(sk)->src, &hcon->src);
+
+	err = sco_chan_add(conn, sk, NULL);
+	if (err)
+		return err;
+
+	if (hcon->state == BT_CONNECTED) {
+		sco_sock_clear_timer(sk);
+		sk->sk_state = BT_CONNECTED;
+	} else {
+		sk->sk_state = BT_CONNECT;
+		sco_sock_set_timer(sk, sk->sk_sndtimeo);
+	}
+
+	return err;
+}
+
+static int sco_send_frame(struct sock *sk, struct sk_buff *skb)
+{
+	struct sco_conn *conn = sco_pi(sk)->conn;
+	int len = skb->len;
+
+	/* Check outgoing MTU */
+	if (len > conn->mtu)
+		return -EINVAL;
+
+	BT_DBG("sk %p len %d", sk, len);
+
+	hci_send_sco(conn->hcon, skb);
+
+	return len;
+}
+
+static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
+{
+	struct sock *sk;
+
+	sco_conn_lock(conn);
+	sk = conn->sk;
+	sco_conn_unlock(conn);
+
+	if (!sk)
+		goto drop;
+
+	BT_DBG("sk %p len %d", sk, skb->len);
+
+	if (sk->sk_state != BT_CONNECTED)
+		goto drop;
+
+	if (!sock_queue_rcv_skb(sk, skb))
+		return;
+
+drop:
+	kfree_skb(skb);
+}
+
+/* -------- Socket interface ---------- */
+static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba)
+{
+	struct sock *sk;
+
+	sk_for_each(sk, &sco_sk_list.head) {
+		if (sk->sk_state != BT_LISTEN)
+			continue;
+
+		if (!bacmp(&sco_pi(sk)->src, ba))
+			return sk;
+	}
+
+	return NULL;
+}
+
+/* Find socket listening on source bdaddr.
+ * Returns closest match.
+ */
+static struct sock *sco_get_sock_listen(bdaddr_t *src)
+{
+	struct sock *sk = NULL, *sk1 = NULL;
+
+	read_lock(&sco_sk_list.lock);
+
+	sk_for_each(sk, &sco_sk_list.head) {
+		if (sk->sk_state != BT_LISTEN)
+			continue;
+
+		/* Exact match. */
+		if (!bacmp(&sco_pi(sk)->src, src))
+			break;
+
+		/* Closest match */
+		if (!bacmp(&sco_pi(sk)->src, BDADDR_ANY))
+			sk1 = sk;
+	}
+
+	read_unlock(&sco_sk_list.lock);
+
+	return sk ? sk : sk1;
+}
+
+static void sco_sock_destruct(struct sock *sk)
+{
+	BT_DBG("sk %p", sk);
+
+	skb_queue_purge(&sk->sk_receive_queue);
+	skb_queue_purge(&sk->sk_write_queue);
+}
+
+static void sco_sock_cleanup_listen(struct sock *parent)
+{
+	struct sock *sk;
+
+	BT_DBG("parent %p", parent);
+
+	/* Close not yet accepted channels */
+	while ((sk = bt_accept_dequeue(parent, NULL))) {
+		sco_sock_close(sk);
+		sco_sock_kill(sk);
+	}
+
+	parent->sk_state  = BT_CLOSED;
+	sock_set_flag(parent, SOCK_ZAPPED);
+}
+
+/* Kill socket (only if zapped and orphan)
+ * Must be called on unlocked socket.
+ */
+static void sco_sock_kill(struct sock *sk)
+{
+	if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
+		return;
+
+	BT_DBG("sk %p state %d", sk, sk->sk_state);
+
+	/* Kill poor orphan */
+	bt_sock_unlink(&sco_sk_list, sk);
+	sock_set_flag(sk, SOCK_DEAD);
+	sock_put(sk);
+}
+
+static void __sco_sock_close(struct sock *sk)
+{
+	BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
+
+	switch (sk->sk_state) {
+	case BT_LISTEN:
+		sco_sock_cleanup_listen(sk);
+		break;
+
+	case BT_CONNECTED:
+	case BT_CONFIG:
+		if (sco_pi(sk)->conn->hcon) {
+			sk->sk_state = BT_DISCONN;
+			sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT);
+			sco_conn_lock(sco_pi(sk)->conn);
+			hci_conn_drop(sco_pi(sk)->conn->hcon);
+			sco_pi(sk)->conn->hcon = NULL;
+			sco_conn_unlock(sco_pi(sk)->conn);
+		} else
+			sco_chan_del(sk, ECONNRESET);
+		break;
+
+	case BT_CONNECT2:
+	case BT_CONNECT:
+	case BT_DISCONN:
+		sco_chan_del(sk, ECONNRESET);
+		break;
+
+	default:
+		sock_set_flag(sk, SOCK_ZAPPED);
+		break;
+	}
+}
+
+/* Must be called on unlocked socket. */
+static void sco_sock_close(struct sock *sk)
+{
+	sco_sock_clear_timer(sk);
+	lock_sock(sk);
+	__sco_sock_close(sk);
+	release_sock(sk);
+}
+
+static void sco_skb_put_cmsg(struct sk_buff *skb, struct msghdr *msg,
+			     struct sock *sk)
+{
+	if (sco_pi(sk)->cmsg_mask & SCO_CMSG_PKT_STATUS)
+		put_cmsg(msg, SOL_BLUETOOTH, BT_SCM_PKT_STATUS,
+			 sizeof(bt_cb(skb)->sco.pkt_status),
+			 &bt_cb(skb)->sco.pkt_status);
+}
+
+static void sco_sock_init(struct sock *sk, struct sock *parent)
+{
+	BT_DBG("sk %p", sk);
+
+	if (parent) {
+		sk->sk_type = parent->sk_type;
+		bt_sk(sk)->flags = bt_sk(parent)->flags;
+		security_sk_clone(parent, sk);
+	} else {
+		bt_sk(sk)->skb_put_cmsg = sco_skb_put_cmsg;
+	}
+}
+
+static struct proto sco_proto = {
+	.name		= "SCO",
+	.owner		= THIS_MODULE,
+	.obj_size	= sizeof(struct sco_pinfo)
+};
+
+static struct sock *sco_sock_alloc(struct net *net, struct socket *sock,
+				   int proto, gfp_t prio, int kern)
+{
+	struct sock *sk;
+
+	sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto, kern);
+	if (!sk)
+		return NULL;
+
+	sock_init_data(sock, sk);
+	INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
+
+	sk->sk_destruct = sco_sock_destruct;
+	sk->sk_sndtimeo = SCO_CONN_TIMEOUT;
+
+	sock_reset_flag(sk, SOCK_ZAPPED);
+
+	sk->sk_protocol = proto;
+	sk->sk_state    = BT_OPEN;
+
+	sco_pi(sk)->setting = BT_VOICE_CVSD_16BIT;
+
+	bt_sock_link(&sco_sk_list, sk);
+	return sk;
+}
+
+static int sco_sock_create(struct net *net, struct socket *sock, int protocol,
+			   int kern)
+{
+	struct sock *sk;
+
+	BT_DBG("sock %p", sock);
+
+	sock->state = SS_UNCONNECTED;
+
+	if (sock->type != SOCK_SEQPACKET)
+		return -ESOCKTNOSUPPORT;
+
+	sock->ops = &sco_sock_ops;
+
+	sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
+	if (!sk)
+		return -ENOMEM;
+
+	sco_sock_init(sk, NULL);
+	return 0;
+}
+
+static int sco_sock_bind(struct socket *sock, struct sockaddr *addr,
+			 int addr_len)
+{
+	struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
+	struct sock *sk = sock->sk;
+	int err = 0;
+
+	if (!addr || addr_len < sizeof(struct sockaddr_sco) ||
+	    addr->sa_family != AF_BLUETOOTH)
+		return -EINVAL;
+
+	BT_DBG("sk %p %pMR", sk, &sa->sco_bdaddr);
+
+	lock_sock(sk);
+
+	if (sk->sk_state != BT_OPEN) {
+		err = -EBADFD;
+		goto done;
+	}
+
+	if (sk->sk_type != SOCK_SEQPACKET) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	bacpy(&sco_pi(sk)->src, &sa->sco_bdaddr);
+
+	sk->sk_state = BT_BOUND;
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
+{
+	struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
+	struct sock *sk = sock->sk;
+	struct hci_dev  *hdev;
+	int err;
+
+	BT_DBG("sk %p", sk);
+
+	if (alen < sizeof(struct sockaddr_sco) ||
+	    addr->sa_family != AF_BLUETOOTH)
+		return -EINVAL;
+
+	lock_sock(sk);
+	if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) {
+		err = -EBADFD;
+		goto done;
+	}
+
+	if (sk->sk_type != SOCK_SEQPACKET) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	hdev = hci_get_route(&sa->sco_bdaddr, &sco_pi(sk)->src, BDADDR_BREDR);
+	if (!hdev) {
+		err = -EHOSTUNREACH;
+		goto done;
+	}
+	hci_dev_lock(hdev);
+
+	/* Set destination address and psm */
+	bacpy(&sco_pi(sk)->dst, &sa->sco_bdaddr);
+
+	err = sco_connect(hdev, sk);
+	hci_dev_unlock(hdev);
+	hci_dev_put(hdev);
+	if (err)
+		goto done;
+
+	err = bt_sock_wait_state(sk, BT_CONNECTED,
+				 sock_sndtimeo(sk, flags & O_NONBLOCK));
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static int sco_sock_listen(struct socket *sock, int backlog)
+{
+	struct sock *sk = sock->sk;
+	bdaddr_t *src = &sco_pi(sk)->src;
+	int err = 0;
+
+	BT_DBG("sk %p backlog %d", sk, backlog);
+
+	lock_sock(sk);
+
+	if (sk->sk_state != BT_BOUND) {
+		err = -EBADFD;
+		goto done;
+	}
+
+	if (sk->sk_type != SOCK_SEQPACKET) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	write_lock(&sco_sk_list.lock);
+
+	if (__sco_get_sock_listen_by_addr(src)) {
+		err = -EADDRINUSE;
+		goto unlock;
+	}
+
+	sk->sk_max_ack_backlog = backlog;
+	sk->sk_ack_backlog = 0;
+
+	sk->sk_state = BT_LISTEN;
+
+unlock:
+	write_unlock(&sco_sk_list.lock);
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static int sco_sock_accept(struct socket *sock, struct socket *newsock,
+			   int flags, bool kern)
+{
+	DEFINE_WAIT_FUNC(wait, woken_wake_function);
+	struct sock *sk = sock->sk, *ch;
+	long timeo;
+	int err = 0;
+
+	lock_sock(sk);
+
+	timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
+
+	BT_DBG("sk %p timeo %ld", sk, timeo);
+
+	/* Wait for an incoming connection. (wake-one). */
+	add_wait_queue_exclusive(sk_sleep(sk), &wait);
+	while (1) {
+		if (sk->sk_state != BT_LISTEN) {
+			err = -EBADFD;
+			break;
+		}
+
+		ch = bt_accept_dequeue(sk, newsock);
+		if (ch)
+			break;
+
+		if (!timeo) {
+			err = -EAGAIN;
+			break;
+		}
+
+		if (signal_pending(current)) {
+			err = sock_intr_errno(timeo);
+			break;
+		}
+
+		release_sock(sk);
+
+		timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
+		lock_sock(sk);
+	}
+	remove_wait_queue(sk_sleep(sk), &wait);
+
+	if (err)
+		goto done;
+
+	newsock->state = SS_CONNECTED;
+
+	BT_DBG("new socket %p", ch);
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static int sco_sock_getname(struct socket *sock, struct sockaddr *addr,
+			    int peer)
+{
+	struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
+	struct sock *sk = sock->sk;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	addr->sa_family = AF_BLUETOOTH;
+
+	if (peer)
+		bacpy(&sa->sco_bdaddr, &sco_pi(sk)->dst);
+	else
+		bacpy(&sa->sco_bdaddr, &sco_pi(sk)->src);
+
+	return sizeof(struct sockaddr_sco);
+}
+
+static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg,
+			    size_t len)
+{
+	struct sock *sk = sock->sk;
+	struct sk_buff *skb;
+	int err;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	err = sock_error(sk);
+	if (err)
+		return err;
+
+	if (msg->msg_flags & MSG_OOB)
+		return -EOPNOTSUPP;
+
+	skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0);
+	if (IS_ERR(skb))
+		return PTR_ERR(skb);
+
+	lock_sock(sk);
+
+	if (sk->sk_state == BT_CONNECTED)
+		err = sco_send_frame(sk, skb);
+	else
+		err = -ENOTCONN;
+
+	release_sock(sk);
+
+	if (err < 0)
+		kfree_skb(skb);
+	return err;
+}
+
+static void sco_conn_defer_accept(struct hci_conn *conn, u16 setting)
+{
+	struct hci_dev *hdev = conn->hdev;
+
+	BT_DBG("conn %p", conn);
+
+	conn->state = BT_CONFIG;
+
+	if (!lmp_esco_capable(hdev)) {
+		struct hci_cp_accept_conn_req cp;
+
+		bacpy(&cp.bdaddr, &conn->dst);
+		cp.role = 0x00; /* Ignored */
+
+		hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
+	} else {
+		struct hci_cp_accept_sync_conn_req cp;
+
+		bacpy(&cp.bdaddr, &conn->dst);
+		cp.pkt_type = cpu_to_le16(conn->pkt_type);
+
+		cp.tx_bandwidth   = cpu_to_le32(0x00001f40);
+		cp.rx_bandwidth   = cpu_to_le32(0x00001f40);
+		cp.content_format = cpu_to_le16(setting);
+
+		switch (setting & SCO_AIRMODE_MASK) {
+		case SCO_AIRMODE_TRANSP:
+			if (conn->pkt_type & ESCO_2EV3)
+				cp.max_latency = cpu_to_le16(0x0008);
+			else
+				cp.max_latency = cpu_to_le16(0x000D);
+			cp.retrans_effort = 0x02;
+			break;
+		case SCO_AIRMODE_CVSD:
+			cp.max_latency = cpu_to_le16(0xffff);
+			cp.retrans_effort = 0xff;
+			break;
+		default:
+			/* use CVSD settings as fallback */
+			cp.max_latency = cpu_to_le16(0xffff);
+			cp.retrans_effort = 0xff;
+			break;
+		}
+
+		hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ,
+			     sizeof(cp), &cp);
+	}
+}
+
+static int sco_sock_recvmsg(struct socket *sock, struct msghdr *msg,
+			    size_t len, int flags)
+{
+	struct sock *sk = sock->sk;
+	struct sco_pinfo *pi = sco_pi(sk);
+
+	lock_sock(sk);
+
+	if (sk->sk_state == BT_CONNECT2 &&
+	    test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
+		sco_conn_defer_accept(pi->conn->hcon, pi->setting);
+		sk->sk_state = BT_CONFIG;
+
+		release_sock(sk);
+		return 0;
+	}
+
+	release_sock(sk);
+
+	return bt_sock_recvmsg(sock, msg, len, flags);
+}
+
+static int sco_sock_setsockopt(struct socket *sock, int level, int optname,
+			       sockptr_t optval, unsigned int optlen)
+{
+	struct sock *sk = sock->sk;
+	int len, err = 0;
+	struct bt_voice voice;
+	u32 opt;
+
+	BT_DBG("sk %p", sk);
+
+	lock_sock(sk);
+
+	switch (optname) {
+
+	case BT_DEFER_SETUP:
+		if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (opt)
+			set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
+		else
+			clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
+		break;
+
+	case BT_VOICE:
+		if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
+		    sk->sk_state != BT_CONNECT2) {
+			err = -EINVAL;
+			break;
+		}
+
+		voice.setting = sco_pi(sk)->setting;
+
+		len = min_t(unsigned int, sizeof(voice), optlen);
+		if (copy_from_sockptr(&voice, optval, len)) {
+			err = -EFAULT;
+			break;
+		}
+
+		/* Explicitly check for these values */
+		if (voice.setting != BT_VOICE_TRANSPARENT &&
+		    voice.setting != BT_VOICE_CVSD_16BIT) {
+			err = -EINVAL;
+			break;
+		}
+
+		sco_pi(sk)->setting = voice.setting;
+		break;
+
+	case BT_PKT_STATUS:
+		if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
+			err = -EFAULT;
+			break;
+		}
+
+		if (opt)
+			sco_pi(sk)->cmsg_mask |= SCO_CMSG_PKT_STATUS;
+		else
+			sco_pi(sk)->cmsg_mask &= SCO_CMSG_PKT_STATUS;
+		break;
+
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+	release_sock(sk);
+	return err;
+}
+
+static int sco_sock_getsockopt_old(struct socket *sock, int optname,
+				   char __user *optval, int __user *optlen)
+{
+	struct sock *sk = sock->sk;
+	struct sco_options opts;
+	struct sco_conninfo cinfo;
+	int len, err = 0;
+
+	BT_DBG("sk %p", sk);
+
+	if (get_user(len, optlen))
+		return -EFAULT;
+
+	lock_sock(sk);
+
+	switch (optname) {
+	case SCO_OPTIONS:
+		if (sk->sk_state != BT_CONNECTED &&
+		    !(sk->sk_state == BT_CONNECT2 &&
+		      test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
+			err = -ENOTCONN;
+			break;
+		}
+
+		opts.mtu = sco_pi(sk)->conn->mtu;
+
+		BT_DBG("mtu %d", opts.mtu);
+
+		len = min_t(unsigned int, len, sizeof(opts));
+		if (copy_to_user(optval, (char *)&opts, len))
+			err = -EFAULT;
+
+		break;
+
+	case SCO_CONNINFO:
+		if (sk->sk_state != BT_CONNECTED &&
+		    !(sk->sk_state == BT_CONNECT2 &&
+		      test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
+			err = -ENOTCONN;
+			break;
+		}
+
+		memset(&cinfo, 0, sizeof(cinfo));
+		cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
+		memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);
+
+		len = min_t(unsigned int, len, sizeof(cinfo));
+		if (copy_to_user(optval, (char *)&cinfo, len))
+			err = -EFAULT;
+
+		break;
+
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+	release_sock(sk);
+	return err;
+}
+
+static int sco_sock_getsockopt(struct socket *sock, int level, int optname,
+			       char __user *optval, int __user *optlen)
+{
+	struct sock *sk = sock->sk;
+	int len, err = 0;
+	struct bt_voice voice;
+	u32 phys;
+	int pkt_status;
+
+	BT_DBG("sk %p", sk);
+
+	if (level == SOL_SCO)
+		return sco_sock_getsockopt_old(sock, optname, optval, optlen);
+
+	if (get_user(len, optlen))
+		return -EFAULT;
+
+	lock_sock(sk);
+
+	switch (optname) {
+
+	case BT_DEFER_SETUP:
+		if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
+			err = -EINVAL;
+			break;
+		}
+
+		if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
+			     (u32 __user *)optval))
+			err = -EFAULT;
+
+		break;
+
+	case BT_VOICE:
+		voice.setting = sco_pi(sk)->setting;
+
+		len = min_t(unsigned int, len, sizeof(voice));
+		if (copy_to_user(optval, (char *)&voice, len))
+			err = -EFAULT;
+
+		break;
+
+	case BT_PHY:
+		if (sk->sk_state != BT_CONNECTED) {
+			err = -ENOTCONN;
+			break;
+		}
+
+		phys = hci_conn_get_phy(sco_pi(sk)->conn->hcon);
+
+		if (put_user(phys, (u32 __user *) optval))
+			err = -EFAULT;
+		break;
+
+	case BT_PKT_STATUS:
+		pkt_status = (sco_pi(sk)->cmsg_mask & SCO_CMSG_PKT_STATUS);
+
+		if (put_user(pkt_status, (int __user *)optval))
+			err = -EFAULT;
+		break;
+
+	case BT_SNDMTU:
+	case BT_RCVMTU:
+		if (sk->sk_state != BT_CONNECTED) {
+			err = -ENOTCONN;
+			break;
+		}
+
+		if (put_user(sco_pi(sk)->conn->mtu, (u32 __user *)optval))
+			err = -EFAULT;
+		break;
+
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+	release_sock(sk);
+	return err;
+}
+
+static int sco_sock_shutdown(struct socket *sock, int how)
+{
+	struct sock *sk = sock->sk;
+	int err = 0;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	if (!sk)
+		return 0;
+
+	sock_hold(sk);
+	lock_sock(sk);
+
+	if (!sk->sk_shutdown) {
+		sk->sk_shutdown = SHUTDOWN_MASK;
+		sco_sock_clear_timer(sk);
+		__sco_sock_close(sk);
+
+		if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
+		    !(current->flags & PF_EXITING))
+			err = bt_sock_wait_state(sk, BT_CLOSED,
+						 sk->sk_lingertime);
+	}
+
+	release_sock(sk);
+	sock_put(sk);
+
+	return err;
+}
+
+static int sco_sock_release(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+	int err = 0;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	if (!sk)
+		return 0;
+
+	sco_sock_close(sk);
+
+	if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
+	    !(current->flags & PF_EXITING)) {
+		lock_sock(sk);
+		err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
+		release_sock(sk);
+	}
+
+	sock_orphan(sk);
+	sco_sock_kill(sk);
+	return err;
+}
+
+static void sco_conn_ready(struct sco_conn *conn)
+{
+	struct sock *parent;
+	struct sock *sk = conn->sk;
+
+	BT_DBG("conn %p", conn);
+
+	if (sk) {
+		sco_sock_clear_timer(sk);
+		bh_lock_sock(sk);
+		sk->sk_state = BT_CONNECTED;
+		sk->sk_state_change(sk);
+		bh_unlock_sock(sk);
+	} else {
+		sco_conn_lock(conn);
+
+		if (!conn->hcon) {
+			sco_conn_unlock(conn);
+			return;
+		}
+
+		parent = sco_get_sock_listen(&conn->hcon->src);
+		if (!parent) {
+			sco_conn_unlock(conn);
+			return;
+		}
+
+		bh_lock_sock(parent);
+
+		sk = sco_sock_alloc(sock_net(parent), NULL,
+				    BTPROTO_SCO, GFP_ATOMIC, 0);
+		if (!sk) {
+			bh_unlock_sock(parent);
+			sco_conn_unlock(conn);
+			return;
+		}
+
+		sco_sock_init(sk, parent);
+
+		bacpy(&sco_pi(sk)->src, &conn->hcon->src);
+		bacpy(&sco_pi(sk)->dst, &conn->hcon->dst);
+
+		hci_conn_hold(conn->hcon);
+		__sco_chan_add(conn, sk, parent);
+
+		if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
+			sk->sk_state = BT_CONNECT2;
+		else
+			sk->sk_state = BT_CONNECTED;
+
+		/* Wake up parent */
+		parent->sk_data_ready(parent);
+
+		bh_unlock_sock(parent);
+
+		sco_conn_unlock(conn);
+	}
+}
+
+/* ----- SCO interface with lower layer (HCI) ----- */
+int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
+{
+	struct sock *sk;
+	int lm = 0;
+
+	BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr);
+
+	/* Find listening sockets */
+	read_lock(&sco_sk_list.lock);
+	sk_for_each(sk, &sco_sk_list.head) {
+		if (sk->sk_state != BT_LISTEN)
+			continue;
+
+		if (!bacmp(&sco_pi(sk)->src, &hdev->bdaddr) ||
+		    !bacmp(&sco_pi(sk)->src, BDADDR_ANY)) {
+			lm |= HCI_LM_ACCEPT;
+
+			if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
+				*flags |= HCI_PROTO_DEFER;
+			break;
+		}
+	}
+	read_unlock(&sco_sk_list.lock);
+
+	return lm;
+}
+
+static void sco_connect_cfm(struct hci_conn *hcon, __u8 status)
+{
+	if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
+		return;
+
+	BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status);
+
+	if (!status) {
+		struct sco_conn *conn;
+
+		conn = sco_conn_add(hcon);
+		if (conn)
+			sco_conn_ready(conn);
+	} else
+		sco_conn_del(hcon, bt_to_errno(status));
+}
+
+static void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason)
+{
+	if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
+		return;
+
+	BT_DBG("hcon %p reason %d", hcon, reason);
+
+	sco_conn_del(hcon, bt_to_errno(reason));
+}
+
+void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
+{
+	struct sco_conn *conn = hcon->sco_data;
+
+	if (!conn)
+		goto drop;
+
+	BT_DBG("conn %p len %d", conn, skb->len);
+
+	if (skb->len) {
+		sco_recv_frame(conn, skb);
+		return;
+	}
+
+drop:
+	kfree_skb(skb);
+}
+
+static struct hci_cb sco_cb = {
+	.name		= "SCO",
+	.connect_cfm	= sco_connect_cfm,
+	.disconn_cfm	= sco_disconn_cfm,
+};
+
+static int sco_debugfs_show(struct seq_file *f, void *p)
+{
+	struct sock *sk;
+
+	read_lock(&sco_sk_list.lock);
+
+	sk_for_each(sk, &sco_sk_list.head) {
+		seq_printf(f, "%pMR %pMR %d\n", &sco_pi(sk)->src,
+			   &sco_pi(sk)->dst, sk->sk_state);
+	}
+
+	read_unlock(&sco_sk_list.lock);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(sco_debugfs);
+
+static struct dentry *sco_debugfs;
+
+static const struct proto_ops sco_sock_ops = {
+	.family		= PF_BLUETOOTH,
+	.owner		= THIS_MODULE,
+	.release	= sco_sock_release,
+	.bind		= sco_sock_bind,
+	.connect	= sco_sock_connect,
+	.listen		= sco_sock_listen,
+	.accept		= sco_sock_accept,
+	.getname	= sco_sock_getname,
+	.sendmsg	= sco_sock_sendmsg,
+	.recvmsg	= sco_sock_recvmsg,
+	.poll		= bt_sock_poll,
+	.ioctl		= bt_sock_ioctl,
+	.gettstamp	= sock_gettstamp,
+	.mmap		= sock_no_mmap,
+	.socketpair	= sock_no_socketpair,
+	.shutdown	= sco_sock_shutdown,
+	.setsockopt	= sco_sock_setsockopt,
+	.getsockopt	= sco_sock_getsockopt
+};
+
+static const struct net_proto_family sco_sock_family_ops = {
+	.family	= PF_BLUETOOTH,
+	.owner	= THIS_MODULE,
+	.create	= sco_sock_create,
+};
+
+int __init sco_init(void)
+{
+	int err;
+
+	BUILD_BUG_ON(sizeof(struct sockaddr_sco) > sizeof(struct sockaddr));
+
+	err = proto_register(&sco_proto, 0);
+	if (err < 0)
+		return err;
+
+	err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
+	if (err < 0) {
+		BT_ERR("SCO socket registration failed");
+		goto error;
+	}
+
+	err = bt_procfs_init(&init_net, "sco", &sco_sk_list, NULL);
+	if (err < 0) {
+		BT_ERR("Failed to create SCO proc file");
+		bt_sock_unregister(BTPROTO_SCO);
+		goto error;
+	}
+
+	BT_INFO("SCO socket layer initialized");
+
+	hci_register_cb(&sco_cb);
+
+	if (IS_ERR_OR_NULL(bt_debugfs))
+		return 0;
+
+	sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs,
+					  NULL, &sco_debugfs_fops);
+
+	return 0;
+
+error:
+	proto_unregister(&sco_proto);
+	return err;
+}
+
+void sco_exit(void)
+{
+	bt_procfs_cleanup(&init_net, "sco");
+
+	debugfs_remove(sco_debugfs);
+
+	hci_unregister_cb(&sco_cb);
+
+	bt_sock_unregister(BTPROTO_SCO);
+
+	proto_unregister(&sco_proto);
+}
+
+module_param(disable_esco, bool, 0644);
+MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation");
diff --git a/net/bluetooth/selftest.c b/net/bluetooth/selftest.c
new file mode 100644
index 000000000..f71c6fa65
--- /dev/null
+++ b/net/bluetooth/selftest.c
@@ -0,0 +1,309 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+
+   Copyright (C) 2014 Intel Corporation
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#include <linux/debugfs.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "ecdh_helper.h"
+#include "smp.h"
+#include "selftest.h"
+
+#if IS_ENABLED(CONFIG_BT_SELFTEST_ECDH)
+
+static const u8 priv_a_1[32] __initconst = {
+	0xbd, 0x1a, 0x3c, 0xcd, 0xa6, 0xb8, 0x99, 0x58,
+	0x99, 0xb7, 0x40, 0xeb, 0x7b, 0x60, 0xff, 0x4a,
+	0x50, 0x3f, 0x10, 0xd2, 0xe3, 0xb3, 0xc9, 0x74,
+	0x38, 0x5f, 0xc5, 0xa3, 0xd4, 0xf6, 0x49, 0x3f,
+};
+static const u8 priv_b_1[32] __initconst = {
+	0xfd, 0xc5, 0x7f, 0xf4, 0x49, 0xdd, 0x4f, 0x6b,
+	0xfb, 0x7c, 0x9d, 0xf1, 0xc2, 0x9a, 0xcb, 0x59,
+	0x2a, 0xe7, 0xd4, 0xee, 0xfb, 0xfc, 0x0a, 0x90,
+	0x9a, 0xbb, 0xf6, 0x32, 0x3d, 0x8b, 0x18, 0x55,
+};
+static const u8 pub_a_1[64] __initconst = {
+	0xe6, 0x9d, 0x35, 0x0e, 0x48, 0x01, 0x03, 0xcc,
+	0xdb, 0xfd, 0xf4, 0xac, 0x11, 0x91, 0xf4, 0xef,
+	0xb9, 0xa5, 0xf9, 0xe9, 0xa7, 0x83, 0x2c, 0x5e,
+	0x2c, 0xbe, 0x97, 0xf2, 0xd2, 0x03, 0xb0, 0x20,
+
+	0x8b, 0xd2, 0x89, 0x15, 0xd0, 0x8e, 0x1c, 0x74,
+	0x24, 0x30, 0xed, 0x8f, 0xc2, 0x45, 0x63, 0x76,
+	0x5c, 0x15, 0x52, 0x5a, 0xbf, 0x9a, 0x32, 0x63,
+	0x6d, 0xeb, 0x2a, 0x65, 0x49, 0x9c, 0x80, 0xdc,
+};
+static const u8 pub_b_1[64] __initconst = {
+	0x90, 0xa1, 0xaa, 0x2f, 0xb2, 0x77, 0x90, 0x55,
+	0x9f, 0xa6, 0x15, 0x86, 0xfd, 0x8a, 0xb5, 0x47,
+	0x00, 0x4c, 0x9e, 0xf1, 0x84, 0x22, 0x59, 0x09,
+	0x96, 0x1d, 0xaf, 0x1f, 0xf0, 0xf0, 0xa1, 0x1e,
+
+	0x4a, 0x21, 0xb1, 0x15, 0xf9, 0xaf, 0x89, 0x5f,
+	0x76, 0x36, 0x8e, 0xe2, 0x30, 0x11, 0x2d, 0x47,
+	0x60, 0x51, 0xb8, 0x9a, 0x3a, 0x70, 0x56, 0x73,
+	0x37, 0xad, 0x9d, 0x42, 0x3e, 0xf3, 0x55, 0x4c,
+};
+static const u8 dhkey_1[32] __initconst = {
+	0x98, 0xa6, 0xbf, 0x73, 0xf3, 0x34, 0x8d, 0x86,
+	0xf1, 0x66, 0xf8, 0xb4, 0x13, 0x6b, 0x79, 0x99,
+	0x9b, 0x7d, 0x39, 0x0a, 0xa6, 0x10, 0x10, 0x34,
+	0x05, 0xad, 0xc8, 0x57, 0xa3, 0x34, 0x02, 0xec,
+};
+
+static const u8 priv_a_2[32] __initconst = {
+	0x63, 0x76, 0x45, 0xd0, 0xf7, 0x73, 0xac, 0xb7,
+	0xff, 0xdd, 0x03, 0x72, 0xb9, 0x72, 0x85, 0xb4,
+	0x41, 0xb6, 0x5d, 0x0c, 0x5d, 0x54, 0x84, 0x60,
+	0x1a, 0xa3, 0x9a, 0x3c, 0x69, 0x16, 0xa5, 0x06,
+};
+static const u8 priv_b_2[32] __initconst = {
+	0xba, 0x30, 0x55, 0x50, 0x19, 0xa2, 0xca, 0xa3,
+	0xa5, 0x29, 0x08, 0xc6, 0xb5, 0x03, 0x88, 0x7e,
+	0x03, 0x2b, 0x50, 0x73, 0xd4, 0x2e, 0x50, 0x97,
+	0x64, 0xcd, 0x72, 0x0d, 0x67, 0xa0, 0x9a, 0x52,
+};
+static const u8 pub_a_2[64] __initconst = {
+	0xdd, 0x78, 0x5c, 0x74, 0x03, 0x9b, 0x7e, 0x98,
+	0xcb, 0x94, 0x87, 0x4a, 0xad, 0xfa, 0xf8, 0xd5,
+	0x43, 0x3e, 0x5c, 0xaf, 0xea, 0xb5, 0x4c, 0xf4,
+	0x9e, 0x80, 0x79, 0x57, 0x7b, 0xa4, 0x31, 0x2c,
+
+	0x4f, 0x5d, 0x71, 0x43, 0x77, 0x43, 0xf8, 0xea,
+	0xd4, 0x3e, 0xbd, 0x17, 0x91, 0x10, 0x21, 0xd0,
+	0x1f, 0x87, 0x43, 0x8e, 0x40, 0xe2, 0x52, 0xcd,
+	0xbe, 0xdf, 0x98, 0x38, 0x18, 0x12, 0x95, 0x91,
+};
+static const u8 pub_b_2[64] __initconst = {
+	0xcc, 0x00, 0x65, 0xe1, 0xf5, 0x6c, 0x0d, 0xcf,
+	0xec, 0x96, 0x47, 0x20, 0x66, 0xc9, 0xdb, 0x84,
+	0x81, 0x75, 0xa8, 0x4d, 0xc0, 0xdf, 0xc7, 0x9d,
+	0x1b, 0x3f, 0x3d, 0xf2, 0x3f, 0xe4, 0x65, 0xf4,
+
+	0x79, 0xb2, 0xec, 0xd8, 0xca, 0x55, 0xa1, 0xa8,
+	0x43, 0x4d, 0x6b, 0xca, 0x10, 0xb0, 0xc2, 0x01,
+	0xc2, 0x33, 0x4e, 0x16, 0x24, 0xc4, 0xef, 0xee,
+	0x99, 0xd8, 0xbb, 0xbc, 0x48, 0xd0, 0x01, 0x02,
+};
+static const u8 dhkey_2[32] __initconst = {
+	0x69, 0xeb, 0x21, 0x32, 0xf2, 0xc6, 0x05, 0x41,
+	0x60, 0x19, 0xcd, 0x5e, 0x94, 0xe1, 0xe6, 0x5f,
+	0x33, 0x07, 0xe3, 0x38, 0x4b, 0x68, 0xe5, 0x62,
+	0x3f, 0x88, 0x6d, 0x2f, 0x3a, 0x84, 0x85, 0xab,
+};
+
+static const u8 priv_a_3[32] __initconst = {
+	0xbd, 0x1a, 0x3c, 0xcd, 0xa6, 0xb8, 0x99, 0x58,
+	0x99, 0xb7, 0x40, 0xeb, 0x7b, 0x60, 0xff, 0x4a,
+	0x50, 0x3f, 0x10, 0xd2, 0xe3, 0xb3, 0xc9, 0x74,
+	0x38, 0x5f, 0xc5, 0xa3, 0xd4, 0xf6, 0x49, 0x3f,
+};
+static const u8 pub_a_3[64] __initconst = {
+	0xe6, 0x9d, 0x35, 0x0e, 0x48, 0x01, 0x03, 0xcc,
+	0xdb, 0xfd, 0xf4, 0xac, 0x11, 0x91, 0xf4, 0xef,
+	0xb9, 0xa5, 0xf9, 0xe9, 0xa7, 0x83, 0x2c, 0x5e,
+	0x2c, 0xbe, 0x97, 0xf2, 0xd2, 0x03, 0xb0, 0x20,
+
+	0x8b, 0xd2, 0x89, 0x15, 0xd0, 0x8e, 0x1c, 0x74,
+	0x24, 0x30, 0xed, 0x8f, 0xc2, 0x45, 0x63, 0x76,
+	0x5c, 0x15, 0x52, 0x5a, 0xbf, 0x9a, 0x32, 0x63,
+	0x6d, 0xeb, 0x2a, 0x65, 0x49, 0x9c, 0x80, 0xdc,
+};
+static const u8 dhkey_3[32] __initconst = {
+	0x2d, 0xab, 0x00, 0x48, 0xcb, 0xb3, 0x7b, 0xda,
+	0x55, 0x7b, 0x8b, 0x72, 0xa8, 0x57, 0x87, 0xc3,
+	0x87, 0x27, 0x99, 0x32, 0xfc, 0x79, 0x5f, 0xae,
+	0x7c, 0x1c, 0xf9, 0x49, 0xe6, 0xd7, 0xaa, 0x70,
+};
+
+static int __init test_ecdh_sample(struct crypto_kpp *tfm, const u8 priv_a[32],
+				   const u8 priv_b[32], const u8 pub_a[64],
+				   const u8 pub_b[64], const u8 dhkey[32])
+{
+	u8 *tmp, *dhkey_a, *dhkey_b;
+	int ret;
+
+	tmp = kmalloc(64, GFP_KERNEL);
+	if (!tmp)
+		return -EINVAL;
+
+	dhkey_a = &tmp[0];
+	dhkey_b = &tmp[32];
+
+	ret = set_ecdh_privkey(tfm, priv_a);
+	if (ret)
+		goto out;
+
+	ret = compute_ecdh_secret(tfm, pub_b, dhkey_a);
+	if (ret)
+		goto out;
+
+	if (memcmp(dhkey_a, dhkey, 32)) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	ret = set_ecdh_privkey(tfm, priv_b);
+	if (ret)
+		goto out;
+
+	ret = compute_ecdh_secret(tfm, pub_a, dhkey_b);
+	if (ret)
+		goto out;
+
+	if (memcmp(dhkey_b, dhkey, 32))
+		ret = -EINVAL;
+	/* fall through*/
+out:
+	kfree(tmp);
+	return ret;
+}
+
+static char test_ecdh_buffer[32];
+
+static ssize_t test_ecdh_read(struct file *file, char __user *user_buf,
+			      size_t count, loff_t *ppos)
+{
+	return simple_read_from_buffer(user_buf, count, ppos, test_ecdh_buffer,
+				       strlen(test_ecdh_buffer));
+}
+
+static const struct file_operations test_ecdh_fops = {
+	.open		= simple_open,
+	.read		= test_ecdh_read,
+	.llseek		= default_llseek,
+};
+
+static int __init test_ecdh(void)
+{
+	struct crypto_kpp *tfm;
+	ktime_t calltime, delta, rettime;
+	unsigned long long duration = 0;
+	int err;
+
+	calltime = ktime_get();
+
+	tfm = crypto_alloc_kpp("ecdh", 0, 0);
+	if (IS_ERR(tfm)) {
+		BT_ERR("Unable to create ECDH crypto context");
+		err = PTR_ERR(tfm);
+		goto done;
+	}
+
+	err = test_ecdh_sample(tfm, priv_a_1, priv_b_1, pub_a_1, pub_b_1,
+			       dhkey_1);
+	if (err) {
+		BT_ERR("ECDH sample 1 failed");
+		goto done;
+	}
+
+	err = test_ecdh_sample(tfm, priv_a_2, priv_b_2, pub_a_2, pub_b_2,
+			       dhkey_2);
+	if (err) {
+		BT_ERR("ECDH sample 2 failed");
+		goto done;
+	}
+
+	err = test_ecdh_sample(tfm, priv_a_3, priv_a_3, pub_a_3, pub_a_3,
+			       dhkey_3);
+	if (err) {
+		BT_ERR("ECDH sample 3 failed");
+		goto done;
+	}
+
+	crypto_free_kpp(tfm);
+
+	rettime = ktime_get();
+	delta = ktime_sub(rettime, calltime);
+	duration = (unsigned long long) ktime_to_ns(delta) >> 10;
+
+	BT_INFO("ECDH test passed in %llu usecs", duration);
+
+done:
+	if (!err)
+		snprintf(test_ecdh_buffer, sizeof(test_ecdh_buffer),
+			 "PASS (%llu usecs)\n", duration);
+	else
+		snprintf(test_ecdh_buffer, sizeof(test_ecdh_buffer), "FAIL\n");
+
+	debugfs_create_file("selftest_ecdh", 0444, bt_debugfs, NULL,
+			    &test_ecdh_fops);
+
+	return err;
+}
+
+#else
+
+static inline int test_ecdh(void)
+{
+	return 0;
+}
+
+#endif
+
+static int __init run_selftest(void)
+{
+	int err;
+
+	BT_INFO("Starting self testing");
+
+	err = test_ecdh();
+	if (err)
+		goto done;
+
+	err = bt_selftest_smp();
+
+done:
+	BT_INFO("Finished self testing");
+
+	return err;
+}
+
+#if IS_MODULE(CONFIG_BT)
+
+/* This is run when CONFIG_BT_SELFTEST=y and CONFIG_BT=m and is just a
+ * wrapper to allow running this at module init.
+ *
+ * If CONFIG_BT_SELFTEST=n, then this code is not compiled at all.
+ */
+int __init bt_selftest(void)
+{
+	return run_selftest();
+}
+
+#else
+
+/* This is run when CONFIG_BT_SELFTEST=y and CONFIG_BT=y and is run
+ * via late_initcall() as last item in the initialization sequence.
+ *
+ * If CONFIG_BT_SELFTEST=n, then this code is not compiled at all.
+ */
+static int __init bt_selftest_init(void)
+{
+	return run_selftest();
+}
+late_initcall(bt_selftest_init);
+
+#endif
diff --git a/net/bluetooth/selftest.h b/net/bluetooth/selftest.h
new file mode 100644
index 000000000..2aa0a346a
--- /dev/null
+++ b/net/bluetooth/selftest.h
@@ -0,0 +1,45 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2014 Intel Corporation
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#if IS_ENABLED(CONFIG_BT_SELFTEST) && IS_MODULE(CONFIG_BT)
+
+/* When CONFIG_BT_SELFTEST=y and the CONFIG_BT=m, then the self testing
+ * is run at module loading time.
+ */
+int bt_selftest(void);
+
+#else
+
+/* When CONFIG_BT_SELFTEST=y and CONFIG_BT=y, then the self testing
+ * is run via late_initcall() to make sure that subsys_initcall() of
+ * the Bluetooth subsystem and device_initcall() of the Crypto subsystem
+ * do not clash.
+ *
+ * When CONFIG_BT_SELFTEST=n, then this turns into an empty call that
+ * has no impact.
+ */
+static inline int bt_selftest(void)
+{
+	return 0;
+}
+
+#endif
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
new file mode 100644
index 000000000..27381e742
--- /dev/null
+++ b/net/bluetooth/smp.c
@@ -0,0 +1,3889 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#include <linux/debugfs.h>
+#include <linux/scatterlist.h>
+#include <linux/crypto.h>
+#include <crypto/aes.h>
+#include <crypto/algapi.h>
+#include <crypto/b128ops.h>
+#include <crypto/hash.h>
+#include <crypto/kpp.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/l2cap.h>
+#include <net/bluetooth/mgmt.h>
+
+#include "ecdh_helper.h"
+#include "smp.h"
+
+#define SMP_DEV(hdev) \
+	((struct smp_dev *)((struct l2cap_chan *)((hdev)->smp_data))->data)
+
+/* Low-level debug macros to be used for stuff that we don't want
+ * accidentially in dmesg, i.e. the values of the various crypto keys
+ * and the inputs & outputs of crypto functions.
+ */
+#ifdef DEBUG
+#define SMP_DBG(fmt, ...) printk(KERN_DEBUG "%s: " fmt, __func__, \
+				 ##__VA_ARGS__)
+#else
+#define SMP_DBG(fmt, ...) no_printk(KERN_DEBUG "%s: " fmt, __func__, \
+				    ##__VA_ARGS__)
+#endif
+
+#define SMP_ALLOW_CMD(smp, code)	set_bit(code, &smp->allow_cmd)
+
+/* Keys which are not distributed with Secure Connections */
+#define SMP_SC_NO_DIST (SMP_DIST_ENC_KEY | SMP_DIST_LINK_KEY);
+
+#define SMP_TIMEOUT	msecs_to_jiffies(30000)
+
+#define AUTH_REQ_MASK(dev)	(hci_dev_test_flag(dev, HCI_SC_ENABLED) ? \
+				 0x3f : 0x07)
+#define KEY_DIST_MASK		0x07
+
+/* Maximum message length that can be passed to aes_cmac */
+#define CMAC_MSG_MAX	80
+
+enum {
+	SMP_FLAG_TK_VALID,
+	SMP_FLAG_CFM_PENDING,
+	SMP_FLAG_MITM_AUTH,
+	SMP_FLAG_COMPLETE,
+	SMP_FLAG_INITIATOR,
+	SMP_FLAG_SC,
+	SMP_FLAG_REMOTE_PK,
+	SMP_FLAG_DEBUG_KEY,
+	SMP_FLAG_WAIT_USER,
+	SMP_FLAG_DHKEY_PENDING,
+	SMP_FLAG_REMOTE_OOB,
+	SMP_FLAG_LOCAL_OOB,
+	SMP_FLAG_CT2,
+};
+
+struct smp_dev {
+	/* Secure Connections OOB data */
+	bool			local_oob;
+	u8			local_pk[64];
+	u8			local_rand[16];
+	bool			debug_key;
+
+	struct crypto_shash	*tfm_cmac;
+	struct crypto_kpp	*tfm_ecdh;
+};
+
+struct smp_chan {
+	struct l2cap_conn	*conn;
+	struct delayed_work	security_timer;
+	unsigned long           allow_cmd; /* Bitmask of allowed commands */
+
+	u8		preq[7]; /* SMP Pairing Request */
+	u8		prsp[7]; /* SMP Pairing Response */
+	u8		prnd[16]; /* SMP Pairing Random (local) */
+	u8		rrnd[16]; /* SMP Pairing Random (remote) */
+	u8		pcnf[16]; /* SMP Pairing Confirm */
+	u8		tk[16]; /* SMP Temporary Key */
+	u8		rr[16]; /* Remote OOB ra/rb value */
+	u8		lr[16]; /* Local OOB ra/rb value */
+	u8		enc_key_size;
+	u8		remote_key_dist;
+	bdaddr_t	id_addr;
+	u8		id_addr_type;
+	u8		irk[16];
+	struct smp_csrk	*csrk;
+	struct smp_csrk	*responder_csrk;
+	struct smp_ltk	*ltk;
+	struct smp_ltk	*responder_ltk;
+	struct smp_irk	*remote_irk;
+	u8		*link_key;
+	unsigned long	flags;
+	u8		method;
+	u8		passkey_round;
+
+	/* Secure Connections variables */
+	u8			local_pk[64];
+	u8			remote_pk[64];
+	u8			dhkey[32];
+	u8			mackey[16];
+
+	struct crypto_shash	*tfm_cmac;
+	struct crypto_kpp	*tfm_ecdh;
+};
+
+/* These debug key values are defined in the SMP section of the core
+ * specification. debug_pk is the public debug key and debug_sk the
+ * private debug key.
+ */
+static const u8 debug_pk[64] = {
+		0xe6, 0x9d, 0x35, 0x0e, 0x48, 0x01, 0x03, 0xcc,
+		0xdb, 0xfd, 0xf4, 0xac, 0x11, 0x91, 0xf4, 0xef,
+		0xb9, 0xa5, 0xf9, 0xe9, 0xa7, 0x83, 0x2c, 0x5e,
+		0x2c, 0xbe, 0x97, 0xf2, 0xd2, 0x03, 0xb0, 0x20,
+
+		0x8b, 0xd2, 0x89, 0x15, 0xd0, 0x8e, 0x1c, 0x74,
+		0x24, 0x30, 0xed, 0x8f, 0xc2, 0x45, 0x63, 0x76,
+		0x5c, 0x15, 0x52, 0x5a, 0xbf, 0x9a, 0x32, 0x63,
+		0x6d, 0xeb, 0x2a, 0x65, 0x49, 0x9c, 0x80, 0xdc,
+};
+
+static const u8 debug_sk[32] = {
+		0xbd, 0x1a, 0x3c, 0xcd, 0xa6, 0xb8, 0x99, 0x58,
+		0x99, 0xb7, 0x40, 0xeb, 0x7b, 0x60, 0xff, 0x4a,
+		0x50, 0x3f, 0x10, 0xd2, 0xe3, 0xb3, 0xc9, 0x74,
+		0x38, 0x5f, 0xc5, 0xa3, 0xd4, 0xf6, 0x49, 0x3f,
+};
+
+static inline void swap_buf(const u8 *src, u8 *dst, size_t len)
+{
+	size_t i;
+
+	for (i = 0; i < len; i++)
+		dst[len - 1 - i] = src[i];
+}
+
+/* The following functions map to the LE SC SMP crypto functions
+ * AES-CMAC, f4, f5, f6, g2 and h6.
+ */
+
+static int aes_cmac(struct crypto_shash *tfm, const u8 k[16], const u8 *m,
+		    size_t len, u8 mac[16])
+{
+	uint8_t tmp[16], mac_msb[16], msg_msb[CMAC_MSG_MAX];
+	int err;
+
+	if (len > CMAC_MSG_MAX)
+		return -EFBIG;
+
+	if (!tfm) {
+		BT_ERR("tfm %p", tfm);
+		return -EINVAL;
+	}
+
+	/* Swap key and message from LSB to MSB */
+	swap_buf(k, tmp, 16);
+	swap_buf(m, msg_msb, len);
+
+	SMP_DBG("msg (len %zu) %*phN", len, (int) len, m);
+	SMP_DBG("key %16phN", k);
+
+	err = crypto_shash_setkey(tfm, tmp, 16);
+	if (err) {
+		BT_ERR("cipher setkey failed: %d", err);
+		return err;
+	}
+
+	err = crypto_shash_tfm_digest(tfm, msg_msb, len, mac_msb);
+	if (err) {
+		BT_ERR("Hash computation error %d", err);
+		return err;
+	}
+
+	swap_buf(mac_msb, mac, 16);
+
+	SMP_DBG("mac %16phN", mac);
+
+	return 0;
+}
+
+static int smp_f4(struct crypto_shash *tfm_cmac, const u8 u[32],
+		  const u8 v[32], const u8 x[16], u8 z, u8 res[16])
+{
+	u8 m[65];
+	int err;
+
+	SMP_DBG("u %32phN", u);
+	SMP_DBG("v %32phN", v);
+	SMP_DBG("x %16phN z %02x", x, z);
+
+	m[0] = z;
+	memcpy(m + 1, v, 32);
+	memcpy(m + 33, u, 32);
+
+	err = aes_cmac(tfm_cmac, x, m, sizeof(m), res);
+	if (err)
+		return err;
+
+	SMP_DBG("res %16phN", res);
+
+	return err;
+}
+
+static int smp_f5(struct crypto_shash *tfm_cmac, const u8 w[32],
+		  const u8 n1[16], const u8 n2[16], const u8 a1[7],
+		  const u8 a2[7], u8 mackey[16], u8 ltk[16])
+{
+	/* The btle, salt and length "magic" values are as defined in
+	 * the SMP section of the Bluetooth core specification. In ASCII
+	 * the btle value ends up being 'btle'. The salt is just a
+	 * random number whereas length is the value 256 in little
+	 * endian format.
+	 */
+	const u8 btle[4] = { 0x65, 0x6c, 0x74, 0x62 };
+	const u8 salt[16] = { 0xbe, 0x83, 0x60, 0x5a, 0xdb, 0x0b, 0x37, 0x60,
+			      0x38, 0xa5, 0xf5, 0xaa, 0x91, 0x83, 0x88, 0x6c };
+	const u8 length[2] = { 0x00, 0x01 };
+	u8 m[53], t[16];
+	int err;
+
+	SMP_DBG("w %32phN", w);
+	SMP_DBG("n1 %16phN n2 %16phN", n1, n2);
+	SMP_DBG("a1 %7phN a2 %7phN", a1, a2);
+
+	err = aes_cmac(tfm_cmac, salt, w, 32, t);
+	if (err)
+		return err;
+
+	SMP_DBG("t %16phN", t);
+
+	memcpy(m, length, 2);
+	memcpy(m + 2, a2, 7);
+	memcpy(m + 9, a1, 7);
+	memcpy(m + 16, n2, 16);
+	memcpy(m + 32, n1, 16);
+	memcpy(m + 48, btle, 4);
+
+	m[52] = 0; /* Counter */
+
+	err = aes_cmac(tfm_cmac, t, m, sizeof(m), mackey);
+	if (err)
+		return err;
+
+	SMP_DBG("mackey %16phN", mackey);
+
+	m[52] = 1; /* Counter */
+
+	err = aes_cmac(tfm_cmac, t, m, sizeof(m), ltk);
+	if (err)
+		return err;
+
+	SMP_DBG("ltk %16phN", ltk);
+
+	return 0;
+}
+
+static int smp_f6(struct crypto_shash *tfm_cmac, const u8 w[16],
+		  const u8 n1[16], const u8 n2[16], const u8 r[16],
+		  const u8 io_cap[3], const u8 a1[7], const u8 a2[7],
+		  u8 res[16])
+{
+	u8 m[65];
+	int err;
+
+	SMP_DBG("w %16phN", w);
+	SMP_DBG("n1 %16phN n2 %16phN", n1, n2);
+	SMP_DBG("r %16phN io_cap %3phN a1 %7phN a2 %7phN", r, io_cap, a1, a2);
+
+	memcpy(m, a2, 7);
+	memcpy(m + 7, a1, 7);
+	memcpy(m + 14, io_cap, 3);
+	memcpy(m + 17, r, 16);
+	memcpy(m + 33, n2, 16);
+	memcpy(m + 49, n1, 16);
+
+	err = aes_cmac(tfm_cmac, w, m, sizeof(m), res);
+	if (err)
+		return err;
+
+	SMP_DBG("res %16phN", res);
+
+	return err;
+}
+
+static int smp_g2(struct crypto_shash *tfm_cmac, const u8 u[32], const u8 v[32],
+		  const u8 x[16], const u8 y[16], u32 *val)
+{
+	u8 m[80], tmp[16];
+	int err;
+
+	SMP_DBG("u %32phN", u);
+	SMP_DBG("v %32phN", v);
+	SMP_DBG("x %16phN y %16phN", x, y);
+
+	memcpy(m, y, 16);
+	memcpy(m + 16, v, 32);
+	memcpy(m + 48, u, 32);
+
+	err = aes_cmac(tfm_cmac, x, m, sizeof(m), tmp);
+	if (err)
+		return err;
+
+	*val = get_unaligned_le32(tmp);
+	*val %= 1000000;
+
+	SMP_DBG("val %06u", *val);
+
+	return 0;
+}
+
+static int smp_h6(struct crypto_shash *tfm_cmac, const u8 w[16],
+		  const u8 key_id[4], u8 res[16])
+{
+	int err;
+
+	SMP_DBG("w %16phN key_id %4phN", w, key_id);
+
+	err = aes_cmac(tfm_cmac, w, key_id, 4, res);
+	if (err)
+		return err;
+
+	SMP_DBG("res %16phN", res);
+
+	return err;
+}
+
+static int smp_h7(struct crypto_shash *tfm_cmac, const u8 w[16],
+		  const u8 salt[16], u8 res[16])
+{
+	int err;
+
+	SMP_DBG("w %16phN salt %16phN", w, salt);
+
+	err = aes_cmac(tfm_cmac, salt, w, 16, res);
+	if (err)
+		return err;
+
+	SMP_DBG("res %16phN", res);
+
+	return err;
+}
+
+/* The following functions map to the legacy SMP crypto functions e, c1,
+ * s1 and ah.
+ */
+
+static int smp_e(const u8 *k, u8 *r)
+{
+	struct crypto_aes_ctx ctx;
+	uint8_t tmp[16], data[16];
+	int err;
+
+	SMP_DBG("k %16phN r %16phN", k, r);
+
+	/* The most significant octet of key corresponds to k[0] */
+	swap_buf(k, tmp, 16);
+
+	err = aes_expandkey(&ctx, tmp, 16);
+	if (err) {
+		BT_ERR("cipher setkey failed: %d", err);
+		return err;
+	}
+
+	/* Most significant octet of plaintextData corresponds to data[0] */
+	swap_buf(r, data, 16);
+
+	aes_encrypt(&ctx, data, data);
+
+	/* Most significant octet of encryptedData corresponds to data[0] */
+	swap_buf(data, r, 16);
+
+	SMP_DBG("r %16phN", r);
+
+	memzero_explicit(&ctx, sizeof (ctx));
+	return err;
+}
+
+static int smp_c1(const u8 k[16],
+		  const u8 r[16], const u8 preq[7], const u8 pres[7], u8 _iat,
+		  const bdaddr_t *ia, u8 _rat, const bdaddr_t *ra, u8 res[16])
+{
+	u8 p1[16], p2[16];
+	int err;
+
+	SMP_DBG("k %16phN r %16phN", k, r);
+	SMP_DBG("iat %u ia %6phN rat %u ra %6phN", _iat, ia, _rat, ra);
+	SMP_DBG("preq %7phN pres %7phN", preq, pres);
+
+	memset(p1, 0, 16);
+
+	/* p1 = pres || preq || _rat || _iat */
+	p1[0] = _iat;
+	p1[1] = _rat;
+	memcpy(p1 + 2, preq, 7);
+	memcpy(p1 + 9, pres, 7);
+
+	SMP_DBG("p1 %16phN", p1);
+
+	/* res = r XOR p1 */
+	u128_xor((u128 *) res, (u128 *) r, (u128 *) p1);
+
+	/* res = e(k, res) */
+	err = smp_e(k, res);
+	if (err) {
+		BT_ERR("Encrypt data error");
+		return err;
+	}
+
+	/* p2 = padding || ia || ra */
+	memcpy(p2, ra, 6);
+	memcpy(p2 + 6, ia, 6);
+	memset(p2 + 12, 0, 4);
+
+	SMP_DBG("p2 %16phN", p2);
+
+	/* res = res XOR p2 */
+	u128_xor((u128 *) res, (u128 *) res, (u128 *) p2);
+
+	/* res = e(k, res) */
+	err = smp_e(k, res);
+	if (err)
+		BT_ERR("Encrypt data error");
+
+	return err;
+}
+
+static int smp_s1(const u8 k[16],
+		  const u8 r1[16], const u8 r2[16], u8 _r[16])
+{
+	int err;
+
+	/* Just least significant octets from r1 and r2 are considered */
+	memcpy(_r, r2, 8);
+	memcpy(_r + 8, r1, 8);
+
+	err = smp_e(k, _r);
+	if (err)
+		BT_ERR("Encrypt data error");
+
+	return err;
+}
+
+static int smp_ah(const u8 irk[16], const u8 r[3], u8 res[3])
+{
+	u8 _res[16];
+	int err;
+
+	/* r' = padding || r */
+	memcpy(_res, r, 3);
+	memset(_res + 3, 0, 13);
+
+	err = smp_e(irk, _res);
+	if (err) {
+		BT_ERR("Encrypt error");
+		return err;
+	}
+
+	/* The output of the random address function ah is:
+	 *	ah(k, r) = e(k, r') mod 2^24
+	 * The output of the security function e is then truncated to 24 bits
+	 * by taking the least significant 24 bits of the output of e as the
+	 * result of ah.
+	 */
+	memcpy(res, _res, 3);
+
+	return 0;
+}
+
+bool smp_irk_matches(struct hci_dev *hdev, const u8 irk[16],
+		     const bdaddr_t *bdaddr)
+{
+	struct l2cap_chan *chan = hdev->smp_data;
+	u8 hash[3];
+	int err;
+
+	if (!chan || !chan->data)
+		return false;
+
+	bt_dev_dbg(hdev, "RPA %pMR IRK %*phN", bdaddr, 16, irk);
+
+	err = smp_ah(irk, &bdaddr->b[3], hash);
+	if (err)
+		return false;
+
+	return !crypto_memneq(bdaddr->b, hash, 3);
+}
+
+int smp_generate_rpa(struct hci_dev *hdev, const u8 irk[16], bdaddr_t *rpa)
+{
+	struct l2cap_chan *chan = hdev->smp_data;
+	int err;
+
+	if (!chan || !chan->data)
+		return -EOPNOTSUPP;
+
+	get_random_bytes(&rpa->b[3], 3);
+
+	rpa->b[5] &= 0x3f;	/* Clear two most significant bits */
+	rpa->b[5] |= 0x40;	/* Set second most significant bit */
+
+	err = smp_ah(irk, &rpa->b[3], rpa->b);
+	if (err < 0)
+		return err;
+
+	bt_dev_dbg(hdev, "RPA %pMR", rpa);
+
+	return 0;
+}
+
+int smp_generate_oob(struct hci_dev *hdev, u8 hash[16], u8 rand[16])
+{
+	struct l2cap_chan *chan = hdev->smp_data;
+	struct smp_dev *smp;
+	int err;
+
+	if (!chan || !chan->data)
+		return -EOPNOTSUPP;
+
+	smp = chan->data;
+
+	if (hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS)) {
+		bt_dev_dbg(hdev, "Using debug keys");
+		err = set_ecdh_privkey(smp->tfm_ecdh, debug_sk);
+		if (err)
+			return err;
+		memcpy(smp->local_pk, debug_pk, 64);
+		smp->debug_key = true;
+	} else {
+		while (true) {
+			/* Generate key pair for Secure Connections */
+			err = generate_ecdh_keys(smp->tfm_ecdh, smp->local_pk);
+			if (err)
+				return err;
+
+			/* This is unlikely, but we need to check that
+			 * we didn't accidentially generate a debug key.
+			 */
+			if (crypto_memneq(smp->local_pk, debug_pk, 64))
+				break;
+		}
+		smp->debug_key = false;
+	}
+
+	SMP_DBG("OOB Public Key X: %32phN", smp->local_pk);
+	SMP_DBG("OOB Public Key Y: %32phN", smp->local_pk + 32);
+
+	get_random_bytes(smp->local_rand, 16);
+
+	err = smp_f4(smp->tfm_cmac, smp->local_pk, smp->local_pk,
+		     smp->local_rand, 0, hash);
+	if (err < 0)
+		return err;
+
+	memcpy(rand, smp->local_rand, 16);
+
+	smp->local_oob = true;
+
+	return 0;
+}
+
+static void smp_send_cmd(struct l2cap_conn *conn, u8 code, u16 len, void *data)
+{
+	struct l2cap_chan *chan = conn->smp;
+	struct smp_chan *smp;
+	struct kvec iv[2];
+	struct msghdr msg;
+
+	if (!chan)
+		return;
+
+	bt_dev_dbg(conn->hcon->hdev, "code 0x%2.2x", code);
+
+	iv[0].iov_base = &code;
+	iv[0].iov_len = 1;
+
+	iv[1].iov_base = data;
+	iv[1].iov_len = len;
+
+	memset(&msg, 0, sizeof(msg));
+
+	iov_iter_kvec(&msg.msg_iter, WRITE, iv, 2, 1 + len);
+
+	l2cap_chan_send(chan, &msg, 1 + len);
+
+	if (!chan->data)
+		return;
+
+	smp = chan->data;
+
+	cancel_delayed_work_sync(&smp->security_timer);
+	schedule_delayed_work(&smp->security_timer, SMP_TIMEOUT);
+}
+
+static u8 authreq_to_seclevel(u8 authreq)
+{
+	if (authreq & SMP_AUTH_MITM) {
+		if (authreq & SMP_AUTH_SC)
+			return BT_SECURITY_FIPS;
+		else
+			return BT_SECURITY_HIGH;
+	} else {
+		return BT_SECURITY_MEDIUM;
+	}
+}
+
+static __u8 seclevel_to_authreq(__u8 sec_level)
+{
+	switch (sec_level) {
+	case BT_SECURITY_FIPS:
+	case BT_SECURITY_HIGH:
+		return SMP_AUTH_MITM | SMP_AUTH_BONDING;
+	case BT_SECURITY_MEDIUM:
+		return SMP_AUTH_BONDING;
+	default:
+		return SMP_AUTH_NONE;
+	}
+}
+
+static void build_pairing_cmd(struct l2cap_conn *conn,
+			      struct smp_cmd_pairing *req,
+			      struct smp_cmd_pairing *rsp, __u8 authreq)
+{
+	struct l2cap_chan *chan = conn->smp;
+	struct smp_chan *smp = chan->data;
+	struct hci_conn *hcon = conn->hcon;
+	struct hci_dev *hdev = hcon->hdev;
+	u8 local_dist = 0, remote_dist = 0, oob_flag = SMP_OOB_NOT_PRESENT;
+
+	if (hci_dev_test_flag(hdev, HCI_BONDABLE)) {
+		local_dist = SMP_DIST_ENC_KEY | SMP_DIST_SIGN;
+		remote_dist = SMP_DIST_ENC_KEY | SMP_DIST_SIGN;
+		authreq |= SMP_AUTH_BONDING;
+	} else {
+		authreq &= ~SMP_AUTH_BONDING;
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_RPA_RESOLVING))
+		remote_dist |= SMP_DIST_ID_KEY;
+
+	if (hci_dev_test_flag(hdev, HCI_PRIVACY))
+		local_dist |= SMP_DIST_ID_KEY;
+
+	if (hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
+	    (authreq & SMP_AUTH_SC)) {
+		struct oob_data *oob_data;
+		u8 bdaddr_type;
+
+		if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
+			local_dist |= SMP_DIST_LINK_KEY;
+			remote_dist |= SMP_DIST_LINK_KEY;
+		}
+
+		if (hcon->dst_type == ADDR_LE_DEV_PUBLIC)
+			bdaddr_type = BDADDR_LE_PUBLIC;
+		else
+			bdaddr_type = BDADDR_LE_RANDOM;
+
+		oob_data = hci_find_remote_oob_data(hdev, &hcon->dst,
+						    bdaddr_type);
+		if (oob_data && oob_data->present) {
+			set_bit(SMP_FLAG_REMOTE_OOB, &smp->flags);
+			oob_flag = SMP_OOB_PRESENT;
+			memcpy(smp->rr, oob_data->rand256, 16);
+			memcpy(smp->pcnf, oob_data->hash256, 16);
+			SMP_DBG("OOB Remote Confirmation: %16phN", smp->pcnf);
+			SMP_DBG("OOB Remote Random: %16phN", smp->rr);
+		}
+
+	} else {
+		authreq &= ~SMP_AUTH_SC;
+	}
+
+	if (rsp == NULL) {
+		req->io_capability = conn->hcon->io_capability;
+		req->oob_flag = oob_flag;
+		req->max_key_size = hdev->le_max_key_size;
+		req->init_key_dist = local_dist;
+		req->resp_key_dist = remote_dist;
+		req->auth_req = (authreq & AUTH_REQ_MASK(hdev));
+
+		smp->remote_key_dist = remote_dist;
+		return;
+	}
+
+	rsp->io_capability = conn->hcon->io_capability;
+	rsp->oob_flag = oob_flag;
+	rsp->max_key_size = hdev->le_max_key_size;
+	rsp->init_key_dist = req->init_key_dist & remote_dist;
+	rsp->resp_key_dist = req->resp_key_dist & local_dist;
+	rsp->auth_req = (authreq & AUTH_REQ_MASK(hdev));
+
+	smp->remote_key_dist = rsp->init_key_dist;
+}
+
+static u8 check_enc_key_size(struct l2cap_conn *conn, __u8 max_key_size)
+{
+	struct l2cap_chan *chan = conn->smp;
+	struct hci_dev *hdev = conn->hcon->hdev;
+	struct smp_chan *smp = chan->data;
+
+	if (conn->hcon->pending_sec_level == BT_SECURITY_FIPS &&
+	    max_key_size != SMP_MAX_ENC_KEY_SIZE)
+		return SMP_ENC_KEY_SIZE;
+
+	if (max_key_size > hdev->le_max_key_size ||
+	    max_key_size < SMP_MIN_ENC_KEY_SIZE)
+		return SMP_ENC_KEY_SIZE;
+
+	smp->enc_key_size = max_key_size;
+
+	return 0;
+}
+
+static void smp_chan_destroy(struct l2cap_conn *conn)
+{
+	struct l2cap_chan *chan = conn->smp;
+	struct smp_chan *smp = chan->data;
+	struct hci_conn *hcon = conn->hcon;
+	bool complete;
+
+	BUG_ON(!smp);
+
+	cancel_delayed_work_sync(&smp->security_timer);
+
+	complete = test_bit(SMP_FLAG_COMPLETE, &smp->flags);
+	mgmt_smp_complete(hcon, complete);
+
+	kfree_sensitive(smp->csrk);
+	kfree_sensitive(smp->responder_csrk);
+	kfree_sensitive(smp->link_key);
+
+	crypto_free_shash(smp->tfm_cmac);
+	crypto_free_kpp(smp->tfm_ecdh);
+
+	/* Ensure that we don't leave any debug key around if debug key
+	 * support hasn't been explicitly enabled.
+	 */
+	if (smp->ltk && smp->ltk->type == SMP_LTK_P256_DEBUG &&
+	    !hci_dev_test_flag(hcon->hdev, HCI_KEEP_DEBUG_KEYS)) {
+		list_del_rcu(&smp->ltk->list);
+		kfree_rcu(smp->ltk, rcu);
+		smp->ltk = NULL;
+	}
+
+	/* If pairing failed clean up any keys we might have */
+	if (!complete) {
+		if (smp->ltk) {
+			list_del_rcu(&smp->ltk->list);
+			kfree_rcu(smp->ltk, rcu);
+		}
+
+		if (smp->responder_ltk) {
+			list_del_rcu(&smp->responder_ltk->list);
+			kfree_rcu(smp->responder_ltk, rcu);
+		}
+
+		if (smp->remote_irk) {
+			list_del_rcu(&smp->remote_irk->list);
+			kfree_rcu(smp->remote_irk, rcu);
+		}
+	}
+
+	chan->data = NULL;
+	kfree_sensitive(smp);
+	hci_conn_drop(hcon);
+}
+
+static void smp_failure(struct l2cap_conn *conn, u8 reason)
+{
+	struct hci_conn *hcon = conn->hcon;
+	struct l2cap_chan *chan = conn->smp;
+
+	if (reason)
+		smp_send_cmd(conn, SMP_CMD_PAIRING_FAIL, sizeof(reason),
+			     &reason);
+
+	mgmt_auth_failed(hcon, HCI_ERROR_AUTH_FAILURE);
+
+	if (chan->data)
+		smp_chan_destroy(conn);
+}
+
+#define JUST_WORKS	0x00
+#define JUST_CFM	0x01
+#define REQ_PASSKEY	0x02
+#define CFM_PASSKEY	0x03
+#define REQ_OOB		0x04
+#define DSP_PASSKEY	0x05
+#define OVERLAP		0xFF
+
+static const u8 gen_method[5][5] = {
+	{ JUST_WORKS,  JUST_CFM,    REQ_PASSKEY, JUST_WORKS, REQ_PASSKEY },
+	{ JUST_WORKS,  JUST_CFM,    REQ_PASSKEY, JUST_WORKS, REQ_PASSKEY },
+	{ CFM_PASSKEY, CFM_PASSKEY, REQ_PASSKEY, JUST_WORKS, CFM_PASSKEY },
+	{ JUST_WORKS,  JUST_CFM,    JUST_WORKS,  JUST_WORKS, JUST_CFM    },
+	{ CFM_PASSKEY, CFM_PASSKEY, REQ_PASSKEY, JUST_WORKS, OVERLAP     },
+};
+
+static const u8 sc_method[5][5] = {
+	{ JUST_WORKS,  JUST_CFM,    REQ_PASSKEY, JUST_WORKS, REQ_PASSKEY },
+	{ JUST_WORKS,  CFM_PASSKEY, REQ_PASSKEY, JUST_WORKS, CFM_PASSKEY },
+	{ DSP_PASSKEY, DSP_PASSKEY, REQ_PASSKEY, JUST_WORKS, DSP_PASSKEY },
+	{ JUST_WORKS,  JUST_CFM,    JUST_WORKS,  JUST_WORKS, JUST_CFM    },
+	{ DSP_PASSKEY, CFM_PASSKEY, REQ_PASSKEY, JUST_WORKS, CFM_PASSKEY },
+};
+
+static u8 get_auth_method(struct smp_chan *smp, u8 local_io, u8 remote_io)
+{
+	/* If either side has unknown io_caps, use JUST_CFM (which gets
+	 * converted later to JUST_WORKS if we're initiators.
+	 */
+	if (local_io > SMP_IO_KEYBOARD_DISPLAY ||
+	    remote_io > SMP_IO_KEYBOARD_DISPLAY)
+		return JUST_CFM;
+
+	if (test_bit(SMP_FLAG_SC, &smp->flags))
+		return sc_method[remote_io][local_io];
+
+	return gen_method[remote_io][local_io];
+}
+
+static int tk_request(struct l2cap_conn *conn, u8 remote_oob, u8 auth,
+						u8 local_io, u8 remote_io)
+{
+	struct hci_conn *hcon = conn->hcon;
+	struct l2cap_chan *chan = conn->smp;
+	struct smp_chan *smp = chan->data;
+	u32 passkey = 0;
+	int ret;
+
+	/* Initialize key for JUST WORKS */
+	memset(smp->tk, 0, sizeof(smp->tk));
+	clear_bit(SMP_FLAG_TK_VALID, &smp->flags);
+
+	bt_dev_dbg(hcon->hdev, "auth:%d lcl:%d rem:%d", auth, local_io,
+		   remote_io);
+
+	/* If neither side wants MITM, either "just" confirm an incoming
+	 * request or use just-works for outgoing ones. The JUST_CFM
+	 * will be converted to JUST_WORKS if necessary later in this
+	 * function. If either side has MITM look up the method from the
+	 * table.
+	 */
+	if (!(auth & SMP_AUTH_MITM))
+		smp->method = JUST_CFM;
+	else
+		smp->method = get_auth_method(smp, local_io, remote_io);
+
+	/* Don't confirm locally initiated pairing attempts */
+	if (smp->method == JUST_CFM && test_bit(SMP_FLAG_INITIATOR,
+						&smp->flags))
+		smp->method = JUST_WORKS;
+
+	/* Don't bother user space with no IO capabilities */
+	if (smp->method == JUST_CFM &&
+	    hcon->io_capability == HCI_IO_NO_INPUT_OUTPUT)
+		smp->method = JUST_WORKS;
+
+	/* If Just Works, Continue with Zero TK and ask user-space for
+	 * confirmation */
+	if (smp->method == JUST_WORKS) {
+		ret = mgmt_user_confirm_request(hcon->hdev, &hcon->dst,
+						hcon->type,
+						hcon->dst_type,
+						passkey, 1);
+		if (ret)
+			return ret;
+		set_bit(SMP_FLAG_WAIT_USER, &smp->flags);
+		return 0;
+	}
+
+	/* If this function is used for SC -> legacy fallback we
+	 * can only recover the just-works case.
+	 */
+	if (test_bit(SMP_FLAG_SC, &smp->flags))
+		return -EINVAL;
+
+	/* Not Just Works/Confirm results in MITM Authentication */
+	if (smp->method != JUST_CFM) {
+		set_bit(SMP_FLAG_MITM_AUTH, &smp->flags);
+		if (hcon->pending_sec_level < BT_SECURITY_HIGH)
+			hcon->pending_sec_level = BT_SECURITY_HIGH;
+	}
+
+	/* If both devices have Keyboard-Display I/O, the initiator
+	 * Confirms and the responder Enters the passkey.
+	 */
+	if (smp->method == OVERLAP) {
+		if (hcon->role == HCI_ROLE_MASTER)
+			smp->method = CFM_PASSKEY;
+		else
+			smp->method = REQ_PASSKEY;
+	}
+
+	/* Generate random passkey. */
+	if (smp->method == CFM_PASSKEY) {
+		memset(smp->tk, 0, sizeof(smp->tk));
+		get_random_bytes(&passkey, sizeof(passkey));
+		passkey %= 1000000;
+		put_unaligned_le32(passkey, smp->tk);
+		bt_dev_dbg(hcon->hdev, "PassKey: %d", passkey);
+		set_bit(SMP_FLAG_TK_VALID, &smp->flags);
+	}
+
+	if (smp->method == REQ_PASSKEY)
+		ret = mgmt_user_passkey_request(hcon->hdev, &hcon->dst,
+						hcon->type, hcon->dst_type);
+	else if (smp->method == JUST_CFM)
+		ret = mgmt_user_confirm_request(hcon->hdev, &hcon->dst,
+						hcon->type, hcon->dst_type,
+						passkey, 1);
+	else
+		ret = mgmt_user_passkey_notify(hcon->hdev, &hcon->dst,
+						hcon->type, hcon->dst_type,
+						passkey, 0);
+
+	return ret;
+}
+
+static u8 smp_confirm(struct smp_chan *smp)
+{
+	struct l2cap_conn *conn = smp->conn;
+	struct smp_cmd_pairing_confirm cp;
+	int ret;
+
+	bt_dev_dbg(conn->hcon->hdev, "conn %p", conn);
+
+	ret = smp_c1(smp->tk, smp->prnd, smp->preq, smp->prsp,
+		     conn->hcon->init_addr_type, &conn->hcon->init_addr,
+		     conn->hcon->resp_addr_type, &conn->hcon->resp_addr,
+		     cp.confirm_val);
+	if (ret)
+		return SMP_UNSPECIFIED;
+
+	clear_bit(SMP_FLAG_CFM_PENDING, &smp->flags);
+
+	smp_send_cmd(smp->conn, SMP_CMD_PAIRING_CONFIRM, sizeof(cp), &cp);
+
+	if (conn->hcon->out)
+		SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_CONFIRM);
+	else
+		SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_RANDOM);
+
+	return 0;
+}
+
+static u8 smp_random(struct smp_chan *smp)
+{
+	struct l2cap_conn *conn = smp->conn;
+	struct hci_conn *hcon = conn->hcon;
+	u8 confirm[16];
+	int ret;
+
+	bt_dev_dbg(conn->hcon->hdev, "conn %p %s", conn,
+		   conn->hcon->out ? "initiator" : "responder");
+
+	ret = smp_c1(smp->tk, smp->rrnd, smp->preq, smp->prsp,
+		     hcon->init_addr_type, &hcon->init_addr,
+		     hcon->resp_addr_type, &hcon->resp_addr, confirm);
+	if (ret)
+		return SMP_UNSPECIFIED;
+
+	if (crypto_memneq(smp->pcnf, confirm, sizeof(smp->pcnf))) {
+		bt_dev_err(hcon->hdev, "pairing failed "
+			   "(confirmation values mismatch)");
+		return SMP_CONFIRM_FAILED;
+	}
+
+	if (hcon->out) {
+		u8 stk[16];
+		__le64 rand = 0;
+		__le16 ediv = 0;
+
+		smp_s1(smp->tk, smp->rrnd, smp->prnd, stk);
+
+		if (test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &hcon->flags))
+			return SMP_UNSPECIFIED;
+
+		hci_le_start_enc(hcon, ediv, rand, stk, smp->enc_key_size);
+		hcon->enc_key_size = smp->enc_key_size;
+		set_bit(HCI_CONN_STK_ENCRYPT, &hcon->flags);
+	} else {
+		u8 stk[16], auth;
+		__le64 rand = 0;
+		__le16 ediv = 0;
+
+		smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM, sizeof(smp->prnd),
+			     smp->prnd);
+
+		smp_s1(smp->tk, smp->prnd, smp->rrnd, stk);
+
+		if (hcon->pending_sec_level == BT_SECURITY_HIGH)
+			auth = 1;
+		else
+			auth = 0;
+
+		/* Even though there's no _RESPONDER suffix this is the
+		 * responder STK we're adding for later lookup (the initiator
+		 * STK never needs to be stored).
+		 */
+		hci_add_ltk(hcon->hdev, &hcon->dst, hcon->dst_type,
+			    SMP_STK, auth, stk, smp->enc_key_size, ediv, rand);
+	}
+
+	return 0;
+}
+
+static void smp_notify_keys(struct l2cap_conn *conn)
+{
+	struct l2cap_chan *chan = conn->smp;
+	struct smp_chan *smp = chan->data;
+	struct hci_conn *hcon = conn->hcon;
+	struct hci_dev *hdev = hcon->hdev;
+	struct smp_cmd_pairing *req = (void *) &smp->preq[1];
+	struct smp_cmd_pairing *rsp = (void *) &smp->prsp[1];
+	bool persistent;
+
+	if (hcon->type == ACL_LINK) {
+		if (hcon->key_type == HCI_LK_DEBUG_COMBINATION)
+			persistent = false;
+		else
+			persistent = !test_bit(HCI_CONN_FLUSH_KEY,
+					       &hcon->flags);
+	} else {
+		/* The LTKs, IRKs and CSRKs should be persistent only if
+		 * both sides had the bonding bit set in their
+		 * authentication requests.
+		 */
+		persistent = !!((req->auth_req & rsp->auth_req) &
+				SMP_AUTH_BONDING);
+	}
+
+	if (smp->remote_irk) {
+		smp->remote_irk->link_type = hcon->type;
+		mgmt_new_irk(hdev, smp->remote_irk, persistent);
+
+		/* Now that user space can be considered to know the
+		 * identity address track the connection based on it
+		 * from now on (assuming this is an LE link).
+		 */
+		if (hcon->type == LE_LINK) {
+			bacpy(&hcon->dst, &smp->remote_irk->bdaddr);
+			hcon->dst_type = smp->remote_irk->addr_type;
+			queue_work(hdev->workqueue, &conn->id_addr_update_work);
+		}
+	}
+
+	if (smp->csrk) {
+		smp->csrk->link_type = hcon->type;
+		smp->csrk->bdaddr_type = hcon->dst_type;
+		bacpy(&smp->csrk->bdaddr, &hcon->dst);
+		mgmt_new_csrk(hdev, smp->csrk, persistent);
+	}
+
+	if (smp->responder_csrk) {
+		smp->responder_csrk->link_type = hcon->type;
+		smp->responder_csrk->bdaddr_type = hcon->dst_type;
+		bacpy(&smp->responder_csrk->bdaddr, &hcon->dst);
+		mgmt_new_csrk(hdev, smp->responder_csrk, persistent);
+	}
+
+	if (smp->ltk) {
+		smp->ltk->link_type = hcon->type;
+		smp->ltk->bdaddr_type = hcon->dst_type;
+		bacpy(&smp->ltk->bdaddr, &hcon->dst);
+		mgmt_new_ltk(hdev, smp->ltk, persistent);
+	}
+
+	if (smp->responder_ltk) {
+		smp->responder_ltk->link_type = hcon->type;
+		smp->responder_ltk->bdaddr_type = hcon->dst_type;
+		bacpy(&smp->responder_ltk->bdaddr, &hcon->dst);
+		mgmt_new_ltk(hdev, smp->responder_ltk, persistent);
+	}
+
+	if (smp->link_key) {
+		struct link_key *key;
+		u8 type;
+
+		if (test_bit(SMP_FLAG_DEBUG_KEY, &smp->flags))
+			type = HCI_LK_DEBUG_COMBINATION;
+		else if (hcon->sec_level == BT_SECURITY_FIPS)
+			type = HCI_LK_AUTH_COMBINATION_P256;
+		else
+			type = HCI_LK_UNAUTH_COMBINATION_P256;
+
+		key = hci_add_link_key(hdev, smp->conn->hcon, &hcon->dst,
+				       smp->link_key, type, 0, &persistent);
+		if (key) {
+			key->link_type = hcon->type;
+			key->bdaddr_type = hcon->dst_type;
+			mgmt_new_link_key(hdev, key, persistent);
+
+			/* Don't keep debug keys around if the relevant
+			 * flag is not set.
+			 */
+			if (!hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS) &&
+			    key->type == HCI_LK_DEBUG_COMBINATION) {
+				list_del_rcu(&key->list);
+				kfree_rcu(key, rcu);
+			}
+		}
+	}
+}
+
+static void sc_add_ltk(struct smp_chan *smp)
+{
+	struct hci_conn *hcon = smp->conn->hcon;
+	u8 key_type, auth;
+
+	if (test_bit(SMP_FLAG_DEBUG_KEY, &smp->flags))
+		key_type = SMP_LTK_P256_DEBUG;
+	else
+		key_type = SMP_LTK_P256;
+
+	if (hcon->pending_sec_level == BT_SECURITY_FIPS)
+		auth = 1;
+	else
+		auth = 0;
+
+	smp->ltk = hci_add_ltk(hcon->hdev, &hcon->dst, hcon->dst_type,
+			       key_type, auth, smp->tk, smp->enc_key_size,
+			       0, 0);
+}
+
+static void sc_generate_link_key(struct smp_chan *smp)
+{
+	/* From core spec. Spells out in ASCII as 'lebr'. */
+	const u8 lebr[4] = { 0x72, 0x62, 0x65, 0x6c };
+
+	smp->link_key = kzalloc(16, GFP_KERNEL);
+	if (!smp->link_key)
+		return;
+
+	if (test_bit(SMP_FLAG_CT2, &smp->flags)) {
+		/* SALT = 0x000000000000000000000000746D7031 */
+		const u8 salt[16] = { 0x31, 0x70, 0x6d, 0x74 };
+
+		if (smp_h7(smp->tfm_cmac, smp->tk, salt, smp->link_key)) {
+			kfree_sensitive(smp->link_key);
+			smp->link_key = NULL;
+			return;
+		}
+	} else {
+		/* From core spec. Spells out in ASCII as 'tmp1'. */
+		const u8 tmp1[4] = { 0x31, 0x70, 0x6d, 0x74 };
+
+		if (smp_h6(smp->tfm_cmac, smp->tk, tmp1, smp->link_key)) {
+			kfree_sensitive(smp->link_key);
+			smp->link_key = NULL;
+			return;
+		}
+	}
+
+	if (smp_h6(smp->tfm_cmac, smp->link_key, lebr, smp->link_key)) {
+		kfree_sensitive(smp->link_key);
+		smp->link_key = NULL;
+		return;
+	}
+}
+
+static void smp_allow_key_dist(struct smp_chan *smp)
+{
+	/* Allow the first expected phase 3 PDU. The rest of the PDUs
+	 * will be allowed in each PDU handler to ensure we receive
+	 * them in the correct order.
+	 */
+	if (smp->remote_key_dist & SMP_DIST_ENC_KEY)
+		SMP_ALLOW_CMD(smp, SMP_CMD_ENCRYPT_INFO);
+	else if (smp->remote_key_dist & SMP_DIST_ID_KEY)
+		SMP_ALLOW_CMD(smp, SMP_CMD_IDENT_INFO);
+	else if (smp->remote_key_dist & SMP_DIST_SIGN)
+		SMP_ALLOW_CMD(smp, SMP_CMD_SIGN_INFO);
+}
+
+static void sc_generate_ltk(struct smp_chan *smp)
+{
+	/* From core spec. Spells out in ASCII as 'brle'. */
+	const u8 brle[4] = { 0x65, 0x6c, 0x72, 0x62 };
+	struct hci_conn *hcon = smp->conn->hcon;
+	struct hci_dev *hdev = hcon->hdev;
+	struct link_key *key;
+
+	key = hci_find_link_key(hdev, &hcon->dst);
+	if (!key) {
+		bt_dev_err(hdev, "no Link Key found to generate LTK");
+		return;
+	}
+
+	if (key->type == HCI_LK_DEBUG_COMBINATION)
+		set_bit(SMP_FLAG_DEBUG_KEY, &smp->flags);
+
+	if (test_bit(SMP_FLAG_CT2, &smp->flags)) {
+		/* SALT = 0x000000000000000000000000746D7032 */
+		const u8 salt[16] = { 0x32, 0x70, 0x6d, 0x74 };
+
+		if (smp_h7(smp->tfm_cmac, key->val, salt, smp->tk))
+			return;
+	} else {
+		/* From core spec. Spells out in ASCII as 'tmp2'. */
+		const u8 tmp2[4] = { 0x32, 0x70, 0x6d, 0x74 };
+
+		if (smp_h6(smp->tfm_cmac, key->val, tmp2, smp->tk))
+			return;
+	}
+
+	if (smp_h6(smp->tfm_cmac, smp->tk, brle, smp->tk))
+		return;
+
+	sc_add_ltk(smp);
+}
+
+static void smp_distribute_keys(struct smp_chan *smp)
+{
+	struct smp_cmd_pairing *req, *rsp;
+	struct l2cap_conn *conn = smp->conn;
+	struct hci_conn *hcon = conn->hcon;
+	struct hci_dev *hdev = hcon->hdev;
+	__u8 *keydist;
+
+	bt_dev_dbg(hdev, "conn %p", conn);
+
+	rsp = (void *) &smp->prsp[1];
+
+	/* The responder sends its keys first */
+	if (hcon->out && (smp->remote_key_dist & KEY_DIST_MASK)) {
+		smp_allow_key_dist(smp);
+		return;
+	}
+
+	req = (void *) &smp->preq[1];
+
+	if (hcon->out) {
+		keydist = &rsp->init_key_dist;
+		*keydist &= req->init_key_dist;
+	} else {
+		keydist = &rsp->resp_key_dist;
+		*keydist &= req->resp_key_dist;
+	}
+
+	if (test_bit(SMP_FLAG_SC, &smp->flags)) {
+		if (hcon->type == LE_LINK && (*keydist & SMP_DIST_LINK_KEY))
+			sc_generate_link_key(smp);
+		if (hcon->type == ACL_LINK && (*keydist & SMP_DIST_ENC_KEY))
+			sc_generate_ltk(smp);
+
+		/* Clear the keys which are generated but not distributed */
+		*keydist &= ~SMP_SC_NO_DIST;
+	}
+
+	bt_dev_dbg(hdev, "keydist 0x%x", *keydist);
+
+	if (*keydist & SMP_DIST_ENC_KEY) {
+		struct smp_cmd_encrypt_info enc;
+		struct smp_cmd_initiator_ident ident;
+		struct smp_ltk *ltk;
+		u8 authenticated;
+		__le16 ediv;
+		__le64 rand;
+
+		/* Make sure we generate only the significant amount of
+		 * bytes based on the encryption key size, and set the rest
+		 * of the value to zeroes.
+		 */
+		get_random_bytes(enc.ltk, smp->enc_key_size);
+		memset(enc.ltk + smp->enc_key_size, 0,
+		       sizeof(enc.ltk) - smp->enc_key_size);
+
+		get_random_bytes(&ediv, sizeof(ediv));
+		get_random_bytes(&rand, sizeof(rand));
+
+		smp_send_cmd(conn, SMP_CMD_ENCRYPT_INFO, sizeof(enc), &enc);
+
+		authenticated = hcon->sec_level == BT_SECURITY_HIGH;
+		ltk = hci_add_ltk(hdev, &hcon->dst, hcon->dst_type,
+				  SMP_LTK_RESPONDER, authenticated, enc.ltk,
+				  smp->enc_key_size, ediv, rand);
+		smp->responder_ltk = ltk;
+
+		ident.ediv = ediv;
+		ident.rand = rand;
+
+		smp_send_cmd(conn, SMP_CMD_INITIATOR_IDENT, sizeof(ident),
+			     &ident);
+
+		*keydist &= ~SMP_DIST_ENC_KEY;
+	}
+
+	if (*keydist & SMP_DIST_ID_KEY) {
+		struct smp_cmd_ident_addr_info addrinfo;
+		struct smp_cmd_ident_info idinfo;
+
+		memcpy(idinfo.irk, hdev->irk, sizeof(idinfo.irk));
+
+		smp_send_cmd(conn, SMP_CMD_IDENT_INFO, sizeof(idinfo), &idinfo);
+
+		/* The hci_conn contains the local identity address
+		 * after the connection has been established.
+		 *
+		 * This is true even when the connection has been
+		 * established using a resolvable random address.
+		 */
+		bacpy(&addrinfo.bdaddr, &hcon->src);
+		addrinfo.addr_type = hcon->src_type;
+
+		smp_send_cmd(conn, SMP_CMD_IDENT_ADDR_INFO, sizeof(addrinfo),
+			     &addrinfo);
+
+		*keydist &= ~SMP_DIST_ID_KEY;
+	}
+
+	if (*keydist & SMP_DIST_SIGN) {
+		struct smp_cmd_sign_info sign;
+		struct smp_csrk *csrk;
+
+		/* Generate a new random key */
+		get_random_bytes(sign.csrk, sizeof(sign.csrk));
+
+		csrk = kzalloc(sizeof(*csrk), GFP_KERNEL);
+		if (csrk) {
+			if (hcon->sec_level > BT_SECURITY_MEDIUM)
+				csrk->type = MGMT_CSRK_LOCAL_AUTHENTICATED;
+			else
+				csrk->type = MGMT_CSRK_LOCAL_UNAUTHENTICATED;
+			memcpy(csrk->val, sign.csrk, sizeof(csrk->val));
+		}
+		smp->responder_csrk = csrk;
+
+		smp_send_cmd(conn, SMP_CMD_SIGN_INFO, sizeof(sign), &sign);
+
+		*keydist &= ~SMP_DIST_SIGN;
+	}
+
+	/* If there are still keys to be received wait for them */
+	if (smp->remote_key_dist & KEY_DIST_MASK) {
+		smp_allow_key_dist(smp);
+		return;
+	}
+
+	set_bit(SMP_FLAG_COMPLETE, &smp->flags);
+	smp_notify_keys(conn);
+
+	smp_chan_destroy(conn);
+}
+
+static void smp_timeout(struct work_struct *work)
+{
+	struct smp_chan *smp = container_of(work, struct smp_chan,
+					    security_timer.work);
+	struct l2cap_conn *conn = smp->conn;
+
+	bt_dev_dbg(conn->hcon->hdev, "conn %p", conn);
+
+	hci_disconnect(conn->hcon, HCI_ERROR_REMOTE_USER_TERM);
+}
+
+static struct smp_chan *smp_chan_create(struct l2cap_conn *conn)
+{
+	struct hci_conn *hcon = conn->hcon;
+	struct l2cap_chan *chan = conn->smp;
+	struct smp_chan *smp;
+
+	smp = kzalloc(sizeof(*smp), GFP_ATOMIC);
+	if (!smp)
+		return NULL;
+
+	smp->tfm_cmac = crypto_alloc_shash("cmac(aes)", 0, 0);
+	if (IS_ERR(smp->tfm_cmac)) {
+		bt_dev_err(hcon->hdev, "Unable to create CMAC crypto context");
+		goto zfree_smp;
+	}
+
+	smp->tfm_ecdh = crypto_alloc_kpp("ecdh", 0, 0);
+	if (IS_ERR(smp->tfm_ecdh)) {
+		bt_dev_err(hcon->hdev, "Unable to create ECDH crypto context");
+		goto free_shash;
+	}
+
+	smp->conn = conn;
+	chan->data = smp;
+
+	SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_FAIL);
+
+	INIT_DELAYED_WORK(&smp->security_timer, smp_timeout);
+
+	hci_conn_hold(hcon);
+
+	return smp;
+
+free_shash:
+	crypto_free_shash(smp->tfm_cmac);
+zfree_smp:
+	kfree_sensitive(smp);
+	return NULL;
+}
+
+static int sc_mackey_and_ltk(struct smp_chan *smp, u8 mackey[16], u8 ltk[16])
+{
+	struct hci_conn *hcon = smp->conn->hcon;
+	u8 *na, *nb, a[7], b[7];
+
+	if (hcon->out) {
+		na   = smp->prnd;
+		nb   = smp->rrnd;
+	} else {
+		na   = smp->rrnd;
+		nb   = smp->prnd;
+	}
+
+	memcpy(a, &hcon->init_addr, 6);
+	memcpy(b, &hcon->resp_addr, 6);
+	a[6] = hcon->init_addr_type;
+	b[6] = hcon->resp_addr_type;
+
+	return smp_f5(smp->tfm_cmac, smp->dhkey, na, nb, a, b, mackey, ltk);
+}
+
+static void sc_dhkey_check(struct smp_chan *smp)
+{
+	struct hci_conn *hcon = smp->conn->hcon;
+	struct smp_cmd_dhkey_check check;
+	u8 a[7], b[7], *local_addr, *remote_addr;
+	u8 io_cap[3], r[16];
+
+	memcpy(a, &hcon->init_addr, 6);
+	memcpy(b, &hcon->resp_addr, 6);
+	a[6] = hcon->init_addr_type;
+	b[6] = hcon->resp_addr_type;
+
+	if (hcon->out) {
+		local_addr = a;
+		remote_addr = b;
+		memcpy(io_cap, &smp->preq[1], 3);
+	} else {
+		local_addr = b;
+		remote_addr = a;
+		memcpy(io_cap, &smp->prsp[1], 3);
+	}
+
+	memset(r, 0, sizeof(r));
+
+	if (smp->method == REQ_PASSKEY || smp->method == DSP_PASSKEY)
+		put_unaligned_le32(hcon->passkey_notify, r);
+
+	if (smp->method == REQ_OOB)
+		memcpy(r, smp->rr, 16);
+
+	smp_f6(smp->tfm_cmac, smp->mackey, smp->prnd, smp->rrnd, r, io_cap,
+	       local_addr, remote_addr, check.e);
+
+	smp_send_cmd(smp->conn, SMP_CMD_DHKEY_CHECK, sizeof(check), &check);
+}
+
+static u8 sc_passkey_send_confirm(struct smp_chan *smp)
+{
+	struct l2cap_conn *conn = smp->conn;
+	struct hci_conn *hcon = conn->hcon;
+	struct smp_cmd_pairing_confirm cfm;
+	u8 r;
+
+	r = ((hcon->passkey_notify >> smp->passkey_round) & 0x01);
+	r |= 0x80;
+
+	get_random_bytes(smp->prnd, sizeof(smp->prnd));
+
+	if (smp_f4(smp->tfm_cmac, smp->local_pk, smp->remote_pk, smp->prnd, r,
+		   cfm.confirm_val))
+		return SMP_UNSPECIFIED;
+
+	smp_send_cmd(conn, SMP_CMD_PAIRING_CONFIRM, sizeof(cfm), &cfm);
+
+	return 0;
+}
+
+static u8 sc_passkey_round(struct smp_chan *smp, u8 smp_op)
+{
+	struct l2cap_conn *conn = smp->conn;
+	struct hci_conn *hcon = conn->hcon;
+	struct hci_dev *hdev = hcon->hdev;
+	u8 cfm[16], r;
+
+	/* Ignore the PDU if we've already done 20 rounds (0 - 19) */
+	if (smp->passkey_round >= 20)
+		return 0;
+
+	switch (smp_op) {
+	case SMP_CMD_PAIRING_RANDOM:
+		r = ((hcon->passkey_notify >> smp->passkey_round) & 0x01);
+		r |= 0x80;
+
+		if (smp_f4(smp->tfm_cmac, smp->remote_pk, smp->local_pk,
+			   smp->rrnd, r, cfm))
+			return SMP_UNSPECIFIED;
+
+		if (crypto_memneq(smp->pcnf, cfm, 16))
+			return SMP_CONFIRM_FAILED;
+
+		smp->passkey_round++;
+
+		if (smp->passkey_round == 20) {
+			/* Generate MacKey and LTK */
+			if (sc_mackey_and_ltk(smp, smp->mackey, smp->tk))
+				return SMP_UNSPECIFIED;
+		}
+
+		/* The round is only complete when the initiator
+		 * receives pairing random.
+		 */
+		if (!hcon->out) {
+			smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM,
+				     sizeof(smp->prnd), smp->prnd);
+			if (smp->passkey_round == 20)
+				SMP_ALLOW_CMD(smp, SMP_CMD_DHKEY_CHECK);
+			else
+				SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_CONFIRM);
+			return 0;
+		}
+
+		/* Start the next round */
+		if (smp->passkey_round != 20)
+			return sc_passkey_round(smp, 0);
+
+		/* Passkey rounds are complete - start DHKey Check */
+		sc_dhkey_check(smp);
+		SMP_ALLOW_CMD(smp, SMP_CMD_DHKEY_CHECK);
+
+		break;
+
+	case SMP_CMD_PAIRING_CONFIRM:
+		if (test_bit(SMP_FLAG_WAIT_USER, &smp->flags)) {
+			set_bit(SMP_FLAG_CFM_PENDING, &smp->flags);
+			return 0;
+		}
+
+		SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_RANDOM);
+
+		if (hcon->out) {
+			smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM,
+				     sizeof(smp->prnd), smp->prnd);
+			return 0;
+		}
+
+		return sc_passkey_send_confirm(smp);
+
+	case SMP_CMD_PUBLIC_KEY:
+	default:
+		/* Initiating device starts the round */
+		if (!hcon->out)
+			return 0;
+
+		bt_dev_dbg(hdev, "Starting passkey round %u",
+			   smp->passkey_round + 1);
+
+		SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_CONFIRM);
+
+		return sc_passkey_send_confirm(smp);
+	}
+
+	return 0;
+}
+
+static int sc_user_reply(struct smp_chan *smp, u16 mgmt_op, __le32 passkey)
+{
+	struct l2cap_conn *conn = smp->conn;
+	struct hci_conn *hcon = conn->hcon;
+	u8 smp_op;
+
+	clear_bit(SMP_FLAG_WAIT_USER, &smp->flags);
+
+	switch (mgmt_op) {
+	case MGMT_OP_USER_PASSKEY_NEG_REPLY:
+		smp_failure(smp->conn, SMP_PASSKEY_ENTRY_FAILED);
+		return 0;
+	case MGMT_OP_USER_CONFIRM_NEG_REPLY:
+		smp_failure(smp->conn, SMP_NUMERIC_COMP_FAILED);
+		return 0;
+	case MGMT_OP_USER_PASSKEY_REPLY:
+		hcon->passkey_notify = le32_to_cpu(passkey);
+		smp->passkey_round = 0;
+
+		if (test_and_clear_bit(SMP_FLAG_CFM_PENDING, &smp->flags))
+			smp_op = SMP_CMD_PAIRING_CONFIRM;
+		else
+			smp_op = 0;
+
+		if (sc_passkey_round(smp, smp_op))
+			return -EIO;
+
+		return 0;
+	}
+
+	/* Initiator sends DHKey check first */
+	if (hcon->out) {
+		sc_dhkey_check(smp);
+		SMP_ALLOW_CMD(smp, SMP_CMD_DHKEY_CHECK);
+	} else if (test_and_clear_bit(SMP_FLAG_DHKEY_PENDING, &smp->flags)) {
+		sc_dhkey_check(smp);
+		sc_add_ltk(smp);
+	}
+
+	return 0;
+}
+
+int smp_user_confirm_reply(struct hci_conn *hcon, u16 mgmt_op, __le32 passkey)
+{
+	struct l2cap_conn *conn = hcon->l2cap_data;
+	struct l2cap_chan *chan;
+	struct smp_chan *smp;
+	u32 value;
+	int err;
+
+	bt_dev_dbg(conn->hcon->hdev, "");
+
+	if (!conn)
+		return -ENOTCONN;
+
+	chan = conn->smp;
+	if (!chan)
+		return -ENOTCONN;
+
+	l2cap_chan_lock(chan);
+	if (!chan->data) {
+		err = -ENOTCONN;
+		goto unlock;
+	}
+
+	smp = chan->data;
+
+	if (test_bit(SMP_FLAG_SC, &smp->flags)) {
+		err = sc_user_reply(smp, mgmt_op, passkey);
+		goto unlock;
+	}
+
+	switch (mgmt_op) {
+	case MGMT_OP_USER_PASSKEY_REPLY:
+		value = le32_to_cpu(passkey);
+		memset(smp->tk, 0, sizeof(smp->tk));
+		bt_dev_dbg(conn->hcon->hdev, "PassKey: %d", value);
+		put_unaligned_le32(value, smp->tk);
+		fallthrough;
+	case MGMT_OP_USER_CONFIRM_REPLY:
+		set_bit(SMP_FLAG_TK_VALID, &smp->flags);
+		break;
+	case MGMT_OP_USER_PASSKEY_NEG_REPLY:
+	case MGMT_OP_USER_CONFIRM_NEG_REPLY:
+		smp_failure(conn, SMP_PASSKEY_ENTRY_FAILED);
+		err = 0;
+		goto unlock;
+	default:
+		smp_failure(conn, SMP_PASSKEY_ENTRY_FAILED);
+		err = -EOPNOTSUPP;
+		goto unlock;
+	}
+
+	err = 0;
+
+	/* If it is our turn to send Pairing Confirm, do so now */
+	if (test_bit(SMP_FLAG_CFM_PENDING, &smp->flags)) {
+		u8 rsp = smp_confirm(smp);
+		if (rsp)
+			smp_failure(conn, rsp);
+	}
+
+unlock:
+	l2cap_chan_unlock(chan);
+	return err;
+}
+
+static void build_bredr_pairing_cmd(struct smp_chan *smp,
+				    struct smp_cmd_pairing *req,
+				    struct smp_cmd_pairing *rsp)
+{
+	struct l2cap_conn *conn = smp->conn;
+	struct hci_dev *hdev = conn->hcon->hdev;
+	u8 local_dist = 0, remote_dist = 0;
+
+	if (hci_dev_test_flag(hdev, HCI_BONDABLE)) {
+		local_dist = SMP_DIST_ENC_KEY | SMP_DIST_SIGN;
+		remote_dist = SMP_DIST_ENC_KEY | SMP_DIST_SIGN;
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_RPA_RESOLVING))
+		remote_dist |= SMP_DIST_ID_KEY;
+
+	if (hci_dev_test_flag(hdev, HCI_PRIVACY))
+		local_dist |= SMP_DIST_ID_KEY;
+
+	if (!rsp) {
+		memset(req, 0, sizeof(*req));
+
+		req->auth_req        = SMP_AUTH_CT2;
+		req->init_key_dist   = local_dist;
+		req->resp_key_dist   = remote_dist;
+		req->max_key_size    = conn->hcon->enc_key_size;
+
+		smp->remote_key_dist = remote_dist;
+
+		return;
+	}
+
+	memset(rsp, 0, sizeof(*rsp));
+
+	rsp->auth_req        = SMP_AUTH_CT2;
+	rsp->max_key_size    = conn->hcon->enc_key_size;
+	rsp->init_key_dist   = req->init_key_dist & remote_dist;
+	rsp->resp_key_dist   = req->resp_key_dist & local_dist;
+
+	smp->remote_key_dist = rsp->init_key_dist;
+}
+
+static u8 smp_cmd_pairing_req(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+	struct smp_cmd_pairing rsp, *req = (void *) skb->data;
+	struct l2cap_chan *chan = conn->smp;
+	struct hci_dev *hdev = conn->hcon->hdev;
+	struct smp_chan *smp;
+	u8 key_size, auth, sec_level;
+	int ret;
+
+	bt_dev_dbg(hdev, "conn %p", conn);
+
+	if (skb->len < sizeof(*req))
+		return SMP_INVALID_PARAMS;
+
+	if (conn->hcon->role != HCI_ROLE_SLAVE)
+		return SMP_CMD_NOTSUPP;
+
+	if (!chan->data)
+		smp = smp_chan_create(conn);
+	else
+		smp = chan->data;
+
+	if (!smp)
+		return SMP_UNSPECIFIED;
+
+	/* We didn't start the pairing, so match remote */
+	auth = req->auth_req & AUTH_REQ_MASK(hdev);
+
+	if (!hci_dev_test_flag(hdev, HCI_BONDABLE) &&
+	    (auth & SMP_AUTH_BONDING))
+		return SMP_PAIRING_NOTSUPP;
+
+	if (hci_dev_test_flag(hdev, HCI_SC_ONLY) && !(auth & SMP_AUTH_SC))
+		return SMP_AUTH_REQUIREMENTS;
+
+	smp->preq[0] = SMP_CMD_PAIRING_REQ;
+	memcpy(&smp->preq[1], req, sizeof(*req));
+	skb_pull(skb, sizeof(*req));
+
+	/* If the remote side's OOB flag is set it means it has
+	 * successfully received our local OOB data - therefore set the
+	 * flag to indicate that local OOB is in use.
+	 */
+	if (req->oob_flag == SMP_OOB_PRESENT && SMP_DEV(hdev)->local_oob)
+		set_bit(SMP_FLAG_LOCAL_OOB, &smp->flags);
+
+	/* SMP over BR/EDR requires special treatment */
+	if (conn->hcon->type == ACL_LINK) {
+		/* We must have a BR/EDR SC link */
+		if (!test_bit(HCI_CONN_AES_CCM, &conn->hcon->flags) &&
+		    !hci_dev_test_flag(hdev, HCI_FORCE_BREDR_SMP))
+			return SMP_CROSS_TRANSP_NOT_ALLOWED;
+
+		set_bit(SMP_FLAG_SC, &smp->flags);
+
+		build_bredr_pairing_cmd(smp, req, &rsp);
+
+		if (req->auth_req & SMP_AUTH_CT2)
+			set_bit(SMP_FLAG_CT2, &smp->flags);
+
+		key_size = min(req->max_key_size, rsp.max_key_size);
+		if (check_enc_key_size(conn, key_size))
+			return SMP_ENC_KEY_SIZE;
+
+		/* Clear bits which are generated but not distributed */
+		smp->remote_key_dist &= ~SMP_SC_NO_DIST;
+
+		smp->prsp[0] = SMP_CMD_PAIRING_RSP;
+		memcpy(&smp->prsp[1], &rsp, sizeof(rsp));
+		smp_send_cmd(conn, SMP_CMD_PAIRING_RSP, sizeof(rsp), &rsp);
+
+		smp_distribute_keys(smp);
+		return 0;
+	}
+
+	build_pairing_cmd(conn, req, &rsp, auth);
+
+	if (rsp.auth_req & SMP_AUTH_SC) {
+		set_bit(SMP_FLAG_SC, &smp->flags);
+
+		if (rsp.auth_req & SMP_AUTH_CT2)
+			set_bit(SMP_FLAG_CT2, &smp->flags);
+	}
+
+	if (conn->hcon->io_capability == HCI_IO_NO_INPUT_OUTPUT)
+		sec_level = BT_SECURITY_MEDIUM;
+	else
+		sec_level = authreq_to_seclevel(auth);
+
+	if (sec_level > conn->hcon->pending_sec_level)
+		conn->hcon->pending_sec_level = sec_level;
+
+	/* If we need MITM check that it can be achieved */
+	if (conn->hcon->pending_sec_level >= BT_SECURITY_HIGH) {
+		u8 method;
+
+		method = get_auth_method(smp, conn->hcon->io_capability,
+					 req->io_capability);
+		if (method == JUST_WORKS || method == JUST_CFM)
+			return SMP_AUTH_REQUIREMENTS;
+	}
+
+	key_size = min(req->max_key_size, rsp.max_key_size);
+	if (check_enc_key_size(conn, key_size))
+		return SMP_ENC_KEY_SIZE;
+
+	get_random_bytes(smp->prnd, sizeof(smp->prnd));
+
+	smp->prsp[0] = SMP_CMD_PAIRING_RSP;
+	memcpy(&smp->prsp[1], &rsp, sizeof(rsp));
+
+	smp_send_cmd(conn, SMP_CMD_PAIRING_RSP, sizeof(rsp), &rsp);
+
+	clear_bit(SMP_FLAG_INITIATOR, &smp->flags);
+
+	/* Strictly speaking we shouldn't allow Pairing Confirm for the
+	 * SC case, however some implementations incorrectly copy RFU auth
+	 * req bits from our security request, which may create a false
+	 * positive SC enablement.
+	 */
+	SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_CONFIRM);
+
+	if (test_bit(SMP_FLAG_SC, &smp->flags)) {
+		SMP_ALLOW_CMD(smp, SMP_CMD_PUBLIC_KEY);
+		/* Clear bits which are generated but not distributed */
+		smp->remote_key_dist &= ~SMP_SC_NO_DIST;
+		/* Wait for Public Key from Initiating Device */
+		return 0;
+	}
+
+	/* Request setup of TK */
+	ret = tk_request(conn, 0, auth, rsp.io_capability, req->io_capability);
+	if (ret)
+		return SMP_UNSPECIFIED;
+
+	return 0;
+}
+
+static u8 sc_send_public_key(struct smp_chan *smp)
+{
+	struct hci_dev *hdev = smp->conn->hcon->hdev;
+
+	bt_dev_dbg(hdev, "");
+
+	if (test_bit(SMP_FLAG_LOCAL_OOB, &smp->flags)) {
+		struct l2cap_chan *chan = hdev->smp_data;
+		struct smp_dev *smp_dev;
+
+		if (!chan || !chan->data)
+			return SMP_UNSPECIFIED;
+
+		smp_dev = chan->data;
+
+		memcpy(smp->local_pk, smp_dev->local_pk, 64);
+		memcpy(smp->lr, smp_dev->local_rand, 16);
+
+		if (smp_dev->debug_key)
+			set_bit(SMP_FLAG_DEBUG_KEY, &smp->flags);
+
+		goto done;
+	}
+
+	if (hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS)) {
+		bt_dev_dbg(hdev, "Using debug keys");
+		if (set_ecdh_privkey(smp->tfm_ecdh, debug_sk))
+			return SMP_UNSPECIFIED;
+		memcpy(smp->local_pk, debug_pk, 64);
+		set_bit(SMP_FLAG_DEBUG_KEY, &smp->flags);
+	} else {
+		while (true) {
+			/* Generate key pair for Secure Connections */
+			if (generate_ecdh_keys(smp->tfm_ecdh, smp->local_pk))
+				return SMP_UNSPECIFIED;
+
+			/* This is unlikely, but we need to check that
+			 * we didn't accidentially generate a debug key.
+			 */
+			if (crypto_memneq(smp->local_pk, debug_pk, 64))
+				break;
+		}
+	}
+
+done:
+	SMP_DBG("Local Public Key X: %32phN", smp->local_pk);
+	SMP_DBG("Local Public Key Y: %32phN", smp->local_pk + 32);
+
+	smp_send_cmd(smp->conn, SMP_CMD_PUBLIC_KEY, 64, smp->local_pk);
+
+	return 0;
+}
+
+static u8 smp_cmd_pairing_rsp(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+	struct smp_cmd_pairing *req, *rsp = (void *) skb->data;
+	struct l2cap_chan *chan = conn->smp;
+	struct smp_chan *smp = chan->data;
+	struct hci_dev *hdev = conn->hcon->hdev;
+	u8 key_size, auth;
+	int ret;
+
+	bt_dev_dbg(hdev, "conn %p", conn);
+
+	if (skb->len < sizeof(*rsp))
+		return SMP_INVALID_PARAMS;
+
+	if (conn->hcon->role != HCI_ROLE_MASTER)
+		return SMP_CMD_NOTSUPP;
+
+	skb_pull(skb, sizeof(*rsp));
+
+	req = (void *) &smp->preq[1];
+
+	key_size = min(req->max_key_size, rsp->max_key_size);
+	if (check_enc_key_size(conn, key_size))
+		return SMP_ENC_KEY_SIZE;
+
+	auth = rsp->auth_req & AUTH_REQ_MASK(hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_SC_ONLY) && !(auth & SMP_AUTH_SC))
+		return SMP_AUTH_REQUIREMENTS;
+
+	/* If the remote side's OOB flag is set it means it has
+	 * successfully received our local OOB data - therefore set the
+	 * flag to indicate that local OOB is in use.
+	 */
+	if (rsp->oob_flag == SMP_OOB_PRESENT && SMP_DEV(hdev)->local_oob)
+		set_bit(SMP_FLAG_LOCAL_OOB, &smp->flags);
+
+	smp->prsp[0] = SMP_CMD_PAIRING_RSP;
+	memcpy(&smp->prsp[1], rsp, sizeof(*rsp));
+
+	/* Update remote key distribution in case the remote cleared
+	 * some bits that we had enabled in our request.
+	 */
+	smp->remote_key_dist &= rsp->resp_key_dist;
+
+	if ((req->auth_req & SMP_AUTH_CT2) && (auth & SMP_AUTH_CT2))
+		set_bit(SMP_FLAG_CT2, &smp->flags);
+
+	/* For BR/EDR this means we're done and can start phase 3 */
+	if (conn->hcon->type == ACL_LINK) {
+		/* Clear bits which are generated but not distributed */
+		smp->remote_key_dist &= ~SMP_SC_NO_DIST;
+		smp_distribute_keys(smp);
+		return 0;
+	}
+
+	if ((req->auth_req & SMP_AUTH_SC) && (auth & SMP_AUTH_SC))
+		set_bit(SMP_FLAG_SC, &smp->flags);
+	else if (conn->hcon->pending_sec_level > BT_SECURITY_HIGH)
+		conn->hcon->pending_sec_level = BT_SECURITY_HIGH;
+
+	/* If we need MITM check that it can be achieved */
+	if (conn->hcon->pending_sec_level >= BT_SECURITY_HIGH) {
+		u8 method;
+
+		method = get_auth_method(smp, req->io_capability,
+					 rsp->io_capability);
+		if (method == JUST_WORKS || method == JUST_CFM)
+			return SMP_AUTH_REQUIREMENTS;
+	}
+
+	get_random_bytes(smp->prnd, sizeof(smp->prnd));
+
+	/* Update remote key distribution in case the remote cleared
+	 * some bits that we had enabled in our request.
+	 */
+	smp->remote_key_dist &= rsp->resp_key_dist;
+
+	if (test_bit(SMP_FLAG_SC, &smp->flags)) {
+		/* Clear bits which are generated but not distributed */
+		smp->remote_key_dist &= ~SMP_SC_NO_DIST;
+		SMP_ALLOW_CMD(smp, SMP_CMD_PUBLIC_KEY);
+		return sc_send_public_key(smp);
+	}
+
+	auth |= req->auth_req;
+
+	ret = tk_request(conn, 0, auth, req->io_capability, rsp->io_capability);
+	if (ret)
+		return SMP_UNSPECIFIED;
+
+	set_bit(SMP_FLAG_CFM_PENDING, &smp->flags);
+
+	/* Can't compose response until we have been confirmed */
+	if (test_bit(SMP_FLAG_TK_VALID, &smp->flags))
+		return smp_confirm(smp);
+
+	return 0;
+}
+
+static u8 sc_check_confirm(struct smp_chan *smp)
+{
+	struct l2cap_conn *conn = smp->conn;
+
+	bt_dev_dbg(conn->hcon->hdev, "");
+
+	if (smp->method == REQ_PASSKEY || smp->method == DSP_PASSKEY)
+		return sc_passkey_round(smp, SMP_CMD_PAIRING_CONFIRM);
+
+	if (conn->hcon->out) {
+		smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM, sizeof(smp->prnd),
+			     smp->prnd);
+		SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_RANDOM);
+	}
+
+	return 0;
+}
+
+/* Work-around for some implementations that incorrectly copy RFU bits
+ * from our security request and thereby create the impression that
+ * we're doing SC when in fact the remote doesn't support it.
+ */
+static int fixup_sc_false_positive(struct smp_chan *smp)
+{
+	struct l2cap_conn *conn = smp->conn;
+	struct hci_conn *hcon = conn->hcon;
+	struct hci_dev *hdev = hcon->hdev;
+	struct smp_cmd_pairing *req, *rsp;
+	u8 auth;
+
+	/* The issue is only observed when we're in responder role */
+	if (hcon->out)
+		return SMP_UNSPECIFIED;
+
+	if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
+		bt_dev_err(hdev, "refusing legacy fallback in SC-only mode");
+		return SMP_UNSPECIFIED;
+	}
+
+	bt_dev_err(hdev, "trying to fall back to legacy SMP");
+
+	req = (void *) &smp->preq[1];
+	rsp = (void *) &smp->prsp[1];
+
+	/* Rebuild key dist flags which may have been cleared for SC */
+	smp->remote_key_dist = (req->init_key_dist & rsp->resp_key_dist);
+
+	auth = req->auth_req & AUTH_REQ_MASK(hdev);
+
+	if (tk_request(conn, 0, auth, rsp->io_capability, req->io_capability)) {
+		bt_dev_err(hdev, "failed to fall back to legacy SMP");
+		return SMP_UNSPECIFIED;
+	}
+
+	clear_bit(SMP_FLAG_SC, &smp->flags);
+
+	return 0;
+}
+
+static u8 smp_cmd_pairing_confirm(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+	struct l2cap_chan *chan = conn->smp;
+	struct smp_chan *smp = chan->data;
+	struct hci_conn *hcon = conn->hcon;
+	struct hci_dev *hdev = hcon->hdev;
+
+	bt_dev_dbg(hdev, "conn %p %s", conn,
+		   hcon->out ? "initiator" : "responder");
+
+	if (skb->len < sizeof(smp->pcnf))
+		return SMP_INVALID_PARAMS;
+
+	memcpy(smp->pcnf, skb->data, sizeof(smp->pcnf));
+	skb_pull(skb, sizeof(smp->pcnf));
+
+	if (test_bit(SMP_FLAG_SC, &smp->flags)) {
+		int ret;
+
+		/* Public Key exchange must happen before any other steps */
+		if (test_bit(SMP_FLAG_REMOTE_PK, &smp->flags))
+			return sc_check_confirm(smp);
+
+		bt_dev_err(hdev, "Unexpected SMP Pairing Confirm");
+
+		ret = fixup_sc_false_positive(smp);
+		if (ret)
+			return ret;
+	}
+
+	if (conn->hcon->out) {
+		smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM, sizeof(smp->prnd),
+			     smp->prnd);
+		SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_RANDOM);
+		return 0;
+	}
+
+	if (test_bit(SMP_FLAG_TK_VALID, &smp->flags))
+		return smp_confirm(smp);
+
+	set_bit(SMP_FLAG_CFM_PENDING, &smp->flags);
+
+	return 0;
+}
+
+static u8 smp_cmd_pairing_random(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+	struct l2cap_chan *chan = conn->smp;
+	struct smp_chan *smp = chan->data;
+	struct hci_conn *hcon = conn->hcon;
+	u8 *pkax, *pkbx, *na, *nb, confirm_hint;
+	u32 passkey;
+	int err;
+
+	bt_dev_dbg(hcon->hdev, "conn %p", conn);
+
+	if (skb->len < sizeof(smp->rrnd))
+		return SMP_INVALID_PARAMS;
+
+	memcpy(smp->rrnd, skb->data, sizeof(smp->rrnd));
+	skb_pull(skb, sizeof(smp->rrnd));
+
+	if (!test_bit(SMP_FLAG_SC, &smp->flags))
+		return smp_random(smp);
+
+	if (hcon->out) {
+		pkax = smp->local_pk;
+		pkbx = smp->remote_pk;
+		na   = smp->prnd;
+		nb   = smp->rrnd;
+	} else {
+		pkax = smp->remote_pk;
+		pkbx = smp->local_pk;
+		na   = smp->rrnd;
+		nb   = smp->prnd;
+	}
+
+	if (smp->method == REQ_OOB) {
+		if (!hcon->out)
+			smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM,
+				     sizeof(smp->prnd), smp->prnd);
+		SMP_ALLOW_CMD(smp, SMP_CMD_DHKEY_CHECK);
+		goto mackey_and_ltk;
+	}
+
+	/* Passkey entry has special treatment */
+	if (smp->method == REQ_PASSKEY || smp->method == DSP_PASSKEY)
+		return sc_passkey_round(smp, SMP_CMD_PAIRING_RANDOM);
+
+	if (hcon->out) {
+		u8 cfm[16];
+
+		err = smp_f4(smp->tfm_cmac, smp->remote_pk, smp->local_pk,
+			     smp->rrnd, 0, cfm);
+		if (err)
+			return SMP_UNSPECIFIED;
+
+		if (crypto_memneq(smp->pcnf, cfm, 16))
+			return SMP_CONFIRM_FAILED;
+	} else {
+		smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM, sizeof(smp->prnd),
+			     smp->prnd);
+		SMP_ALLOW_CMD(smp, SMP_CMD_DHKEY_CHECK);
+
+		/* Only Just-Works pairing requires extra checks */
+		if (smp->method != JUST_WORKS)
+			goto mackey_and_ltk;
+
+		/* If there already exists long term key in local host, leave
+		 * the decision to user space since the remote device could
+		 * be legitimate or malicious.
+		 */
+		if (hci_find_ltk(hcon->hdev, &hcon->dst, hcon->dst_type,
+				 hcon->role)) {
+			/* Set passkey to 0. The value can be any number since
+			 * it'll be ignored anyway.
+			 */
+			passkey = 0;
+			confirm_hint = 1;
+			goto confirm;
+		}
+	}
+
+mackey_and_ltk:
+	/* Generate MacKey and LTK */
+	err = sc_mackey_and_ltk(smp, smp->mackey, smp->tk);
+	if (err)
+		return SMP_UNSPECIFIED;
+
+	if (smp->method == REQ_OOB) {
+		if (hcon->out) {
+			sc_dhkey_check(smp);
+			SMP_ALLOW_CMD(smp, SMP_CMD_DHKEY_CHECK);
+		}
+		return 0;
+	}
+
+	err = smp_g2(smp->tfm_cmac, pkax, pkbx, na, nb, &passkey);
+	if (err)
+		return SMP_UNSPECIFIED;
+
+	confirm_hint = 0;
+
+confirm:
+	if (smp->method == JUST_WORKS)
+		confirm_hint = 1;
+
+	err = mgmt_user_confirm_request(hcon->hdev, &hcon->dst, hcon->type,
+					hcon->dst_type, passkey, confirm_hint);
+	if (err)
+		return SMP_UNSPECIFIED;
+
+	set_bit(SMP_FLAG_WAIT_USER, &smp->flags);
+
+	return 0;
+}
+
+static bool smp_ltk_encrypt(struct l2cap_conn *conn, u8 sec_level)
+{
+	struct smp_ltk *key;
+	struct hci_conn *hcon = conn->hcon;
+
+	key = hci_find_ltk(hcon->hdev, &hcon->dst, hcon->dst_type, hcon->role);
+	if (!key)
+		return false;
+
+	if (smp_ltk_sec_level(key) < sec_level)
+		return false;
+
+	if (test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &hcon->flags))
+		return true;
+
+	hci_le_start_enc(hcon, key->ediv, key->rand, key->val, key->enc_size);
+	hcon->enc_key_size = key->enc_size;
+
+	/* We never store STKs for initiator role, so clear this flag */
+	clear_bit(HCI_CONN_STK_ENCRYPT, &hcon->flags);
+
+	return true;
+}
+
+bool smp_sufficient_security(struct hci_conn *hcon, u8 sec_level,
+			     enum smp_key_pref key_pref)
+{
+	if (sec_level == BT_SECURITY_LOW)
+		return true;
+
+	/* If we're encrypted with an STK but the caller prefers using
+	 * LTK claim insufficient security. This way we allow the
+	 * connection to be re-encrypted with an LTK, even if the LTK
+	 * provides the same level of security. Only exception is if we
+	 * don't have an LTK (e.g. because of key distribution bits).
+	 */
+	if (key_pref == SMP_USE_LTK &&
+	    test_bit(HCI_CONN_STK_ENCRYPT, &hcon->flags) &&
+	    hci_find_ltk(hcon->hdev, &hcon->dst, hcon->dst_type, hcon->role))
+		return false;
+
+	if (hcon->sec_level >= sec_level)
+		return true;
+
+	return false;
+}
+
+static u8 smp_cmd_security_req(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+	struct smp_cmd_security_req *rp = (void *) skb->data;
+	struct smp_cmd_pairing cp;
+	struct hci_conn *hcon = conn->hcon;
+	struct hci_dev *hdev = hcon->hdev;
+	struct smp_chan *smp;
+	u8 sec_level, auth;
+
+	bt_dev_dbg(hdev, "conn %p", conn);
+
+	if (skb->len < sizeof(*rp))
+		return SMP_INVALID_PARAMS;
+
+	if (hcon->role != HCI_ROLE_MASTER)
+		return SMP_CMD_NOTSUPP;
+
+	auth = rp->auth_req & AUTH_REQ_MASK(hdev);
+
+	if (hci_dev_test_flag(hdev, HCI_SC_ONLY) && !(auth & SMP_AUTH_SC))
+		return SMP_AUTH_REQUIREMENTS;
+
+	if (hcon->io_capability == HCI_IO_NO_INPUT_OUTPUT)
+		sec_level = BT_SECURITY_MEDIUM;
+	else
+		sec_level = authreq_to_seclevel(auth);
+
+	if (smp_sufficient_security(hcon, sec_level, SMP_USE_LTK)) {
+		/* If link is already encrypted with sufficient security we
+		 * still need refresh encryption as per Core Spec 5.0 Vol 3,
+		 * Part H 2.4.6
+		 */
+		smp_ltk_encrypt(conn, hcon->sec_level);
+		return 0;
+	}
+
+	if (sec_level > hcon->pending_sec_level)
+		hcon->pending_sec_level = sec_level;
+
+	if (smp_ltk_encrypt(conn, hcon->pending_sec_level))
+		return 0;
+
+	smp = smp_chan_create(conn);
+	if (!smp)
+		return SMP_UNSPECIFIED;
+
+	if (!hci_dev_test_flag(hdev, HCI_BONDABLE) &&
+	    (auth & SMP_AUTH_BONDING))
+		return SMP_PAIRING_NOTSUPP;
+
+	skb_pull(skb, sizeof(*rp));
+
+	memset(&cp, 0, sizeof(cp));
+	build_pairing_cmd(conn, &cp, NULL, auth);
+
+	smp->preq[0] = SMP_CMD_PAIRING_REQ;
+	memcpy(&smp->preq[1], &cp, sizeof(cp));
+
+	smp_send_cmd(conn, SMP_CMD_PAIRING_REQ, sizeof(cp), &cp);
+	SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_RSP);
+
+	return 0;
+}
+
+int smp_conn_security(struct hci_conn *hcon, __u8 sec_level)
+{
+	struct l2cap_conn *conn = hcon->l2cap_data;
+	struct l2cap_chan *chan;
+	struct smp_chan *smp;
+	__u8 authreq;
+	int ret;
+
+	bt_dev_dbg(hcon->hdev, "conn %p hcon %p level 0x%2.2x", conn, hcon,
+		   sec_level);
+
+	/* This may be NULL if there's an unexpected disconnection */
+	if (!conn)
+		return 1;
+
+	if (!hci_dev_test_flag(hcon->hdev, HCI_LE_ENABLED))
+		return 1;
+
+	if (smp_sufficient_security(hcon, sec_level, SMP_USE_LTK))
+		return 1;
+
+	if (sec_level > hcon->pending_sec_level)
+		hcon->pending_sec_level = sec_level;
+
+	if (hcon->role == HCI_ROLE_MASTER)
+		if (smp_ltk_encrypt(conn, hcon->pending_sec_level))
+			return 0;
+
+	chan = conn->smp;
+	if (!chan) {
+		bt_dev_err(hcon->hdev, "security requested but not available");
+		return 1;
+	}
+
+	l2cap_chan_lock(chan);
+
+	/* If SMP is already in progress ignore this request */
+	if (chan->data) {
+		ret = 0;
+		goto unlock;
+	}
+
+	smp = smp_chan_create(conn);
+	if (!smp) {
+		ret = 1;
+		goto unlock;
+	}
+
+	authreq = seclevel_to_authreq(sec_level);
+
+	if (hci_dev_test_flag(hcon->hdev, HCI_SC_ENABLED)) {
+		authreq |= SMP_AUTH_SC;
+		if (hci_dev_test_flag(hcon->hdev, HCI_SSP_ENABLED))
+			authreq |= SMP_AUTH_CT2;
+	}
+
+	/* Don't attempt to set MITM if setting is overridden by debugfs
+	 * Needed to pass certification test SM/MAS/PKE/BV-01-C
+	 */
+	if (!hci_dev_test_flag(hcon->hdev, HCI_FORCE_NO_MITM)) {
+		/* Require MITM if IO Capability allows or the security level
+		 * requires it.
+		 */
+		if (hcon->io_capability != HCI_IO_NO_INPUT_OUTPUT ||
+		    hcon->pending_sec_level > BT_SECURITY_MEDIUM)
+			authreq |= SMP_AUTH_MITM;
+	}
+
+	if (hcon->role == HCI_ROLE_MASTER) {
+		struct smp_cmd_pairing cp;
+
+		build_pairing_cmd(conn, &cp, NULL, authreq);
+		smp->preq[0] = SMP_CMD_PAIRING_REQ;
+		memcpy(&smp->preq[1], &cp, sizeof(cp));
+
+		smp_send_cmd(conn, SMP_CMD_PAIRING_REQ, sizeof(cp), &cp);
+		SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_RSP);
+	} else {
+		struct smp_cmd_security_req cp;
+		cp.auth_req = authreq;
+		smp_send_cmd(conn, SMP_CMD_SECURITY_REQ, sizeof(cp), &cp);
+		SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_REQ);
+	}
+
+	set_bit(SMP_FLAG_INITIATOR, &smp->flags);
+	ret = 0;
+
+unlock:
+	l2cap_chan_unlock(chan);
+	return ret;
+}
+
+int smp_cancel_and_remove_pairing(struct hci_dev *hdev, bdaddr_t *bdaddr,
+				  u8 addr_type)
+{
+	struct hci_conn *hcon;
+	struct l2cap_conn *conn;
+	struct l2cap_chan *chan;
+	struct smp_chan *smp;
+	int err;
+
+	err = hci_remove_ltk(hdev, bdaddr, addr_type);
+	hci_remove_irk(hdev, bdaddr, addr_type);
+
+	hcon = hci_conn_hash_lookup_le(hdev, bdaddr, addr_type);
+	if (!hcon)
+		goto done;
+
+	conn = hcon->l2cap_data;
+	if (!conn)
+		goto done;
+
+	chan = conn->smp;
+	if (!chan)
+		goto done;
+
+	l2cap_chan_lock(chan);
+
+	smp = chan->data;
+	if (smp) {
+		/* Set keys to NULL to make sure smp_failure() does not try to
+		 * remove and free already invalidated rcu list entries. */
+		smp->ltk = NULL;
+		smp->responder_ltk = NULL;
+		smp->remote_irk = NULL;
+
+		if (test_bit(SMP_FLAG_COMPLETE, &smp->flags))
+			smp_failure(conn, 0);
+		else
+			smp_failure(conn, SMP_UNSPECIFIED);
+		err = 0;
+	}
+
+	l2cap_chan_unlock(chan);
+
+done:
+	return err;
+}
+
+static int smp_cmd_encrypt_info(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+	struct smp_cmd_encrypt_info *rp = (void *) skb->data;
+	struct l2cap_chan *chan = conn->smp;
+	struct smp_chan *smp = chan->data;
+
+	bt_dev_dbg(conn->hcon->hdev, "conn %p", conn);
+
+	if (skb->len < sizeof(*rp))
+		return SMP_INVALID_PARAMS;
+
+	/* Pairing is aborted if any blocked keys are distributed */
+	if (hci_is_blocked_key(conn->hcon->hdev, HCI_BLOCKED_KEY_TYPE_LTK,
+			       rp->ltk)) {
+		bt_dev_warn_ratelimited(conn->hcon->hdev,
+					"LTK blocked for %pMR",
+					&conn->hcon->dst);
+		return SMP_INVALID_PARAMS;
+	}
+
+	SMP_ALLOW_CMD(smp, SMP_CMD_INITIATOR_IDENT);
+
+	skb_pull(skb, sizeof(*rp));
+
+	memcpy(smp->tk, rp->ltk, sizeof(smp->tk));
+
+	return 0;
+}
+
+static int smp_cmd_initiator_ident(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+	struct smp_cmd_initiator_ident *rp = (void *)skb->data;
+	struct l2cap_chan *chan = conn->smp;
+	struct smp_chan *smp = chan->data;
+	struct hci_dev *hdev = conn->hcon->hdev;
+	struct hci_conn *hcon = conn->hcon;
+	struct smp_ltk *ltk;
+	u8 authenticated;
+
+	bt_dev_dbg(hdev, "conn %p", conn);
+
+	if (skb->len < sizeof(*rp))
+		return SMP_INVALID_PARAMS;
+
+	/* Mark the information as received */
+	smp->remote_key_dist &= ~SMP_DIST_ENC_KEY;
+
+	if (smp->remote_key_dist & SMP_DIST_ID_KEY)
+		SMP_ALLOW_CMD(smp, SMP_CMD_IDENT_INFO);
+	else if (smp->remote_key_dist & SMP_DIST_SIGN)
+		SMP_ALLOW_CMD(smp, SMP_CMD_SIGN_INFO);
+
+	skb_pull(skb, sizeof(*rp));
+
+	authenticated = (hcon->sec_level == BT_SECURITY_HIGH);
+	ltk = hci_add_ltk(hdev, &hcon->dst, hcon->dst_type, SMP_LTK,
+			  authenticated, smp->tk, smp->enc_key_size,
+			  rp->ediv, rp->rand);
+	smp->ltk = ltk;
+	if (!(smp->remote_key_dist & KEY_DIST_MASK))
+		smp_distribute_keys(smp);
+
+	return 0;
+}
+
+static int smp_cmd_ident_info(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+	struct smp_cmd_ident_info *info = (void *) skb->data;
+	struct l2cap_chan *chan = conn->smp;
+	struct smp_chan *smp = chan->data;
+
+	bt_dev_dbg(conn->hcon->hdev, "");
+
+	if (skb->len < sizeof(*info))
+		return SMP_INVALID_PARAMS;
+
+	/* Pairing is aborted if any blocked keys are distributed */
+	if (hci_is_blocked_key(conn->hcon->hdev, HCI_BLOCKED_KEY_TYPE_IRK,
+			       info->irk)) {
+		bt_dev_warn_ratelimited(conn->hcon->hdev,
+					"Identity key blocked for %pMR",
+					&conn->hcon->dst);
+		return SMP_INVALID_PARAMS;
+	}
+
+	SMP_ALLOW_CMD(smp, SMP_CMD_IDENT_ADDR_INFO);
+
+	skb_pull(skb, sizeof(*info));
+
+	memcpy(smp->irk, info->irk, 16);
+
+	return 0;
+}
+
+static int smp_cmd_ident_addr_info(struct l2cap_conn *conn,
+				   struct sk_buff *skb)
+{
+	struct smp_cmd_ident_addr_info *info = (void *) skb->data;
+	struct l2cap_chan *chan = conn->smp;
+	struct smp_chan *smp = chan->data;
+	struct hci_conn *hcon = conn->hcon;
+	bdaddr_t rpa;
+
+	bt_dev_dbg(hcon->hdev, "");
+
+	if (skb->len < sizeof(*info))
+		return SMP_INVALID_PARAMS;
+
+	/* Mark the information as received */
+	smp->remote_key_dist &= ~SMP_DIST_ID_KEY;
+
+	if (smp->remote_key_dist & SMP_DIST_SIGN)
+		SMP_ALLOW_CMD(smp, SMP_CMD_SIGN_INFO);
+
+	skb_pull(skb, sizeof(*info));
+
+	/* Strictly speaking the Core Specification (4.1) allows sending
+	 * an empty address which would force us to rely on just the IRK
+	 * as "identity information". However, since such
+	 * implementations are not known of and in order to not over
+	 * complicate our implementation, simply pretend that we never
+	 * received an IRK for such a device.
+	 *
+	 * The Identity Address must also be a Static Random or Public
+	 * Address, which hci_is_identity_address() checks for.
+	 */
+	if (!bacmp(&info->bdaddr, BDADDR_ANY) ||
+	    !hci_is_identity_address(&info->bdaddr, info->addr_type)) {
+		bt_dev_err(hcon->hdev, "ignoring IRK with no identity address");
+		goto distribute;
+	}
+
+	/* Drop IRK if peer is using identity address during pairing but is
+	 * providing different address as identity information.
+	 *
+	 * Microsoft Surface Precision Mouse is known to have this bug.
+	 */
+	if (hci_is_identity_address(&hcon->dst, hcon->dst_type) &&
+	    (bacmp(&info->bdaddr, &hcon->dst) ||
+	     info->addr_type != hcon->dst_type)) {
+		bt_dev_err(hcon->hdev,
+			   "ignoring IRK with invalid identity address");
+		goto distribute;
+	}
+
+	bacpy(&smp->id_addr, &info->bdaddr);
+	smp->id_addr_type = info->addr_type;
+
+	if (hci_bdaddr_is_rpa(&hcon->dst, hcon->dst_type))
+		bacpy(&rpa, &hcon->dst);
+	else
+		bacpy(&rpa, BDADDR_ANY);
+
+	smp->remote_irk = hci_add_irk(conn->hcon->hdev, &smp->id_addr,
+				      smp->id_addr_type, smp->irk, &rpa);
+
+distribute:
+	if (!(smp->remote_key_dist & KEY_DIST_MASK))
+		smp_distribute_keys(smp);
+
+	return 0;
+}
+
+static int smp_cmd_sign_info(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+	struct smp_cmd_sign_info *rp = (void *) skb->data;
+	struct l2cap_chan *chan = conn->smp;
+	struct smp_chan *smp = chan->data;
+	struct smp_csrk *csrk;
+
+	bt_dev_dbg(conn->hcon->hdev, "conn %p", conn);
+
+	if (skb->len < sizeof(*rp))
+		return SMP_INVALID_PARAMS;
+
+	/* Mark the information as received */
+	smp->remote_key_dist &= ~SMP_DIST_SIGN;
+
+	skb_pull(skb, sizeof(*rp));
+
+	csrk = kzalloc(sizeof(*csrk), GFP_KERNEL);
+	if (csrk) {
+		if (conn->hcon->sec_level > BT_SECURITY_MEDIUM)
+			csrk->type = MGMT_CSRK_REMOTE_AUTHENTICATED;
+		else
+			csrk->type = MGMT_CSRK_REMOTE_UNAUTHENTICATED;
+		memcpy(csrk->val, rp->csrk, sizeof(csrk->val));
+	}
+	smp->csrk = csrk;
+	smp_distribute_keys(smp);
+
+	return 0;
+}
+
+static u8 sc_select_method(struct smp_chan *smp)
+{
+	struct l2cap_conn *conn = smp->conn;
+	struct hci_conn *hcon = conn->hcon;
+	struct smp_cmd_pairing *local, *remote;
+	u8 local_mitm, remote_mitm, local_io, remote_io, method;
+
+	if (test_bit(SMP_FLAG_REMOTE_OOB, &smp->flags) ||
+	    test_bit(SMP_FLAG_LOCAL_OOB, &smp->flags))
+		return REQ_OOB;
+
+	/* The preq/prsp contain the raw Pairing Request/Response PDUs
+	 * which are needed as inputs to some crypto functions. To get
+	 * the "struct smp_cmd_pairing" from them we need to skip the
+	 * first byte which contains the opcode.
+	 */
+	if (hcon->out) {
+		local = (void *) &smp->preq[1];
+		remote = (void *) &smp->prsp[1];
+	} else {
+		local = (void *) &smp->prsp[1];
+		remote = (void *) &smp->preq[1];
+	}
+
+	local_io = local->io_capability;
+	remote_io = remote->io_capability;
+
+	local_mitm = (local->auth_req & SMP_AUTH_MITM);
+	remote_mitm = (remote->auth_req & SMP_AUTH_MITM);
+
+	/* If either side wants MITM, look up the method from the table,
+	 * otherwise use JUST WORKS.
+	 */
+	if (local_mitm || remote_mitm)
+		method = get_auth_method(smp, local_io, remote_io);
+	else
+		method = JUST_WORKS;
+
+	/* Don't confirm locally initiated pairing attempts */
+	if (method == JUST_CFM && test_bit(SMP_FLAG_INITIATOR, &smp->flags))
+		method = JUST_WORKS;
+
+	return method;
+}
+
+static int smp_cmd_public_key(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+	struct smp_cmd_public_key *key = (void *) skb->data;
+	struct hci_conn *hcon = conn->hcon;
+	struct l2cap_chan *chan = conn->smp;
+	struct smp_chan *smp = chan->data;
+	struct hci_dev *hdev = hcon->hdev;
+	struct crypto_kpp *tfm_ecdh;
+	struct smp_cmd_pairing_confirm cfm;
+	int err;
+
+	bt_dev_dbg(hdev, "conn %p", conn);
+
+	if (skb->len < sizeof(*key))
+		return SMP_INVALID_PARAMS;
+
+	/* Check if remote and local public keys are the same and debug key is
+	 * not in use.
+	 */
+	if (!test_bit(SMP_FLAG_DEBUG_KEY, &smp->flags) &&
+	    !crypto_memneq(key, smp->local_pk, 64)) {
+		bt_dev_err(hdev, "Remote and local public keys are identical");
+		return SMP_UNSPECIFIED;
+	}
+
+	memcpy(smp->remote_pk, key, 64);
+
+	if (test_bit(SMP_FLAG_REMOTE_OOB, &smp->flags)) {
+		err = smp_f4(smp->tfm_cmac, smp->remote_pk, smp->remote_pk,
+			     smp->rr, 0, cfm.confirm_val);
+		if (err)
+			return SMP_UNSPECIFIED;
+
+		if (crypto_memneq(cfm.confirm_val, smp->pcnf, 16))
+			return SMP_CONFIRM_FAILED;
+	}
+
+	/* Non-initiating device sends its public key after receiving
+	 * the key from the initiating device.
+	 */
+	if (!hcon->out) {
+		err = sc_send_public_key(smp);
+		if (err)
+			return err;
+	}
+
+	SMP_DBG("Remote Public Key X: %32phN", smp->remote_pk);
+	SMP_DBG("Remote Public Key Y: %32phN", smp->remote_pk + 32);
+
+	/* Compute the shared secret on the same crypto tfm on which the private
+	 * key was set/generated.
+	 */
+	if (test_bit(SMP_FLAG_LOCAL_OOB, &smp->flags)) {
+		struct l2cap_chan *hchan = hdev->smp_data;
+		struct smp_dev *smp_dev;
+
+		if (!hchan || !hchan->data)
+			return SMP_UNSPECIFIED;
+
+		smp_dev = hchan->data;
+
+		tfm_ecdh = smp_dev->tfm_ecdh;
+	} else {
+		tfm_ecdh = smp->tfm_ecdh;
+	}
+
+	if (compute_ecdh_secret(tfm_ecdh, smp->remote_pk, smp->dhkey))
+		return SMP_UNSPECIFIED;
+
+	SMP_DBG("DHKey %32phN", smp->dhkey);
+
+	set_bit(SMP_FLAG_REMOTE_PK, &smp->flags);
+
+	smp->method = sc_select_method(smp);
+
+	bt_dev_dbg(hdev, "selected method 0x%02x", smp->method);
+
+	/* JUST_WORKS and JUST_CFM result in an unauthenticated key */
+	if (smp->method == JUST_WORKS || smp->method == JUST_CFM)
+		hcon->pending_sec_level = BT_SECURITY_MEDIUM;
+	else
+		hcon->pending_sec_level = BT_SECURITY_FIPS;
+
+	if (!crypto_memneq(debug_pk, smp->remote_pk, 64))
+		set_bit(SMP_FLAG_DEBUG_KEY, &smp->flags);
+
+	if (smp->method == DSP_PASSKEY) {
+		get_random_bytes(&hcon->passkey_notify,
+				 sizeof(hcon->passkey_notify));
+		hcon->passkey_notify %= 1000000;
+		hcon->passkey_entered = 0;
+		smp->passkey_round = 0;
+		if (mgmt_user_passkey_notify(hdev, &hcon->dst, hcon->type,
+					     hcon->dst_type,
+					     hcon->passkey_notify,
+					     hcon->passkey_entered))
+			return SMP_UNSPECIFIED;
+		SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_CONFIRM);
+		return sc_passkey_round(smp, SMP_CMD_PUBLIC_KEY);
+	}
+
+	if (smp->method == REQ_OOB) {
+		if (hcon->out)
+			smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM,
+				     sizeof(smp->prnd), smp->prnd);
+
+		SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_RANDOM);
+
+		return 0;
+	}
+
+	if (hcon->out)
+		SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_CONFIRM);
+
+	if (smp->method == REQ_PASSKEY) {
+		if (mgmt_user_passkey_request(hdev, &hcon->dst, hcon->type,
+					      hcon->dst_type))
+			return SMP_UNSPECIFIED;
+		SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_CONFIRM);
+		set_bit(SMP_FLAG_WAIT_USER, &smp->flags);
+		return 0;
+	}
+
+	/* The Initiating device waits for the non-initiating device to
+	 * send the confirm value.
+	 */
+	if (conn->hcon->out)
+		return 0;
+
+	err = smp_f4(smp->tfm_cmac, smp->local_pk, smp->remote_pk, smp->prnd,
+		     0, cfm.confirm_val);
+	if (err)
+		return SMP_UNSPECIFIED;
+
+	smp_send_cmd(conn, SMP_CMD_PAIRING_CONFIRM, sizeof(cfm), &cfm);
+	SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_RANDOM);
+
+	return 0;
+}
+
+static int smp_cmd_dhkey_check(struct l2cap_conn *conn, struct sk_buff *skb)
+{
+	struct smp_cmd_dhkey_check *check = (void *) skb->data;
+	struct l2cap_chan *chan = conn->smp;
+	struct hci_conn *hcon = conn->hcon;
+	struct smp_chan *smp = chan->data;
+	u8 a[7], b[7], *local_addr, *remote_addr;
+	u8 io_cap[3], r[16], e[16];
+	int err;
+
+	bt_dev_dbg(hcon->hdev, "conn %p", conn);
+
+	if (skb->len < sizeof(*check))
+		return SMP_INVALID_PARAMS;
+
+	memcpy(a, &hcon->init_addr, 6);
+	memcpy(b, &hcon->resp_addr, 6);
+	a[6] = hcon->init_addr_type;
+	b[6] = hcon->resp_addr_type;
+
+	if (hcon->out) {
+		local_addr = a;
+		remote_addr = b;
+		memcpy(io_cap, &smp->prsp[1], 3);
+	} else {
+		local_addr = b;
+		remote_addr = a;
+		memcpy(io_cap, &smp->preq[1], 3);
+	}
+
+	memset(r, 0, sizeof(r));
+
+	if (smp->method == REQ_PASSKEY || smp->method == DSP_PASSKEY)
+		put_unaligned_le32(hcon->passkey_notify, r);
+	else if (smp->method == REQ_OOB)
+		memcpy(r, smp->lr, 16);
+
+	err = smp_f6(smp->tfm_cmac, smp->mackey, smp->rrnd, smp->prnd, r,
+		     io_cap, remote_addr, local_addr, e);
+	if (err)
+		return SMP_UNSPECIFIED;
+
+	if (crypto_memneq(check->e, e, 16))
+		return SMP_DHKEY_CHECK_FAILED;
+
+	if (!hcon->out) {
+		if (test_bit(SMP_FLAG_WAIT_USER, &smp->flags)) {
+			set_bit(SMP_FLAG_DHKEY_PENDING, &smp->flags);
+			return 0;
+		}
+
+		/* Responder sends DHKey check as response to initiator */
+		sc_dhkey_check(smp);
+	}
+
+	sc_add_ltk(smp);
+
+	if (hcon->out) {
+		hci_le_start_enc(hcon, 0, 0, smp->tk, smp->enc_key_size);
+		hcon->enc_key_size = smp->enc_key_size;
+	}
+
+	return 0;
+}
+
+static int smp_cmd_keypress_notify(struct l2cap_conn *conn,
+				   struct sk_buff *skb)
+{
+	struct smp_cmd_keypress_notify *kp = (void *) skb->data;
+
+	bt_dev_dbg(conn->hcon->hdev, "value 0x%02x", kp->value);
+
+	return 0;
+}
+
+static int smp_sig_channel(struct l2cap_chan *chan, struct sk_buff *skb)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct hci_conn *hcon = conn->hcon;
+	struct smp_chan *smp;
+	__u8 code, reason;
+	int err = 0;
+
+	if (skb->len < 1)
+		return -EILSEQ;
+
+	if (!hci_dev_test_flag(hcon->hdev, HCI_LE_ENABLED)) {
+		reason = SMP_PAIRING_NOTSUPP;
+		goto done;
+	}
+
+	code = skb->data[0];
+	skb_pull(skb, sizeof(code));
+
+	smp = chan->data;
+
+	if (code > SMP_CMD_MAX)
+		goto drop;
+
+	if (smp && !test_and_clear_bit(code, &smp->allow_cmd))
+		goto drop;
+
+	/* If we don't have a context the only allowed commands are
+	 * pairing request and security request.
+	 */
+	if (!smp && code != SMP_CMD_PAIRING_REQ && code != SMP_CMD_SECURITY_REQ)
+		goto drop;
+
+	switch (code) {
+	case SMP_CMD_PAIRING_REQ:
+		reason = smp_cmd_pairing_req(conn, skb);
+		break;
+
+	case SMP_CMD_PAIRING_FAIL:
+		smp_failure(conn, 0);
+		err = -EPERM;
+		break;
+
+	case SMP_CMD_PAIRING_RSP:
+		reason = smp_cmd_pairing_rsp(conn, skb);
+		break;
+
+	case SMP_CMD_SECURITY_REQ:
+		reason = smp_cmd_security_req(conn, skb);
+		break;
+
+	case SMP_CMD_PAIRING_CONFIRM:
+		reason = smp_cmd_pairing_confirm(conn, skb);
+		break;
+
+	case SMP_CMD_PAIRING_RANDOM:
+		reason = smp_cmd_pairing_random(conn, skb);
+		break;
+
+	case SMP_CMD_ENCRYPT_INFO:
+		reason = smp_cmd_encrypt_info(conn, skb);
+		break;
+
+	case SMP_CMD_INITIATOR_IDENT:
+		reason = smp_cmd_initiator_ident(conn, skb);
+		break;
+
+	case SMP_CMD_IDENT_INFO:
+		reason = smp_cmd_ident_info(conn, skb);
+		break;
+
+	case SMP_CMD_IDENT_ADDR_INFO:
+		reason = smp_cmd_ident_addr_info(conn, skb);
+		break;
+
+	case SMP_CMD_SIGN_INFO:
+		reason = smp_cmd_sign_info(conn, skb);
+		break;
+
+	case SMP_CMD_PUBLIC_KEY:
+		reason = smp_cmd_public_key(conn, skb);
+		break;
+
+	case SMP_CMD_DHKEY_CHECK:
+		reason = smp_cmd_dhkey_check(conn, skb);
+		break;
+
+	case SMP_CMD_KEYPRESS_NOTIFY:
+		reason = smp_cmd_keypress_notify(conn, skb);
+		break;
+
+	default:
+		bt_dev_dbg(hcon->hdev, "Unknown command code 0x%2.2x", code);
+		reason = SMP_CMD_NOTSUPP;
+		goto done;
+	}
+
+done:
+	if (!err) {
+		if (reason)
+			smp_failure(conn, reason);
+		kfree_skb(skb);
+	}
+
+	return err;
+
+drop:
+	bt_dev_err(hcon->hdev, "unexpected SMP command 0x%02x from %pMR",
+		   code, &hcon->dst);
+	kfree_skb(skb);
+	return 0;
+}
+
+static void smp_teardown_cb(struct l2cap_chan *chan, int err)
+{
+	struct l2cap_conn *conn = chan->conn;
+
+	bt_dev_dbg(conn->hcon->hdev, "chan %p", chan);
+
+	if (chan->data)
+		smp_chan_destroy(conn);
+
+	conn->smp = NULL;
+	l2cap_chan_put(chan);
+}
+
+static void bredr_pairing(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct hci_conn *hcon = conn->hcon;
+	struct hci_dev *hdev = hcon->hdev;
+	struct smp_cmd_pairing req;
+	struct smp_chan *smp;
+
+	bt_dev_dbg(hdev, "chan %p", chan);
+
+	/* Only new pairings are interesting */
+	if (!test_bit(HCI_CONN_NEW_LINK_KEY, &hcon->flags))
+		return;
+
+	/* Don't bother if we're not encrypted */
+	if (!test_bit(HCI_CONN_ENCRYPT, &hcon->flags))
+		return;
+
+	/* Only initiator may initiate SMP over BR/EDR */
+	if (hcon->role != HCI_ROLE_MASTER)
+		return;
+
+	/* Secure Connections support must be enabled */
+	if (!hci_dev_test_flag(hdev, HCI_SC_ENABLED))
+		return;
+
+	/* BR/EDR must use Secure Connections for SMP */
+	if (!test_bit(HCI_CONN_AES_CCM, &hcon->flags) &&
+	    !hci_dev_test_flag(hdev, HCI_FORCE_BREDR_SMP))
+		return;
+
+	/* If our LE support is not enabled don't do anything */
+	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
+		return;
+
+	/* Don't bother if remote LE support is not enabled */
+	if (!lmp_host_le_capable(hcon))
+		return;
+
+	/* Remote must support SMP fixed chan for BR/EDR */
+	if (!(conn->remote_fixed_chan & L2CAP_FC_SMP_BREDR))
+		return;
+
+	/* Don't bother if SMP is already ongoing */
+	if (chan->data)
+		return;
+
+	smp = smp_chan_create(conn);
+	if (!smp) {
+		bt_dev_err(hdev, "unable to create SMP context for BR/EDR");
+		return;
+	}
+
+	set_bit(SMP_FLAG_SC, &smp->flags);
+
+	bt_dev_dbg(hdev, "starting SMP over BR/EDR");
+
+	/* Prepare and send the BR/EDR SMP Pairing Request */
+	build_bredr_pairing_cmd(smp, &req, NULL);
+
+	smp->preq[0] = SMP_CMD_PAIRING_REQ;
+	memcpy(&smp->preq[1], &req, sizeof(req));
+
+	smp_send_cmd(conn, SMP_CMD_PAIRING_REQ, sizeof(req), &req);
+	SMP_ALLOW_CMD(smp, SMP_CMD_PAIRING_RSP);
+}
+
+static void smp_resume_cb(struct l2cap_chan *chan)
+{
+	struct smp_chan *smp = chan->data;
+	struct l2cap_conn *conn = chan->conn;
+	struct hci_conn *hcon = conn->hcon;
+
+	bt_dev_dbg(hcon->hdev, "chan %p", chan);
+
+	if (hcon->type == ACL_LINK) {
+		bredr_pairing(chan);
+		return;
+	}
+
+	if (!smp)
+		return;
+
+	if (!test_bit(HCI_CONN_ENCRYPT, &hcon->flags))
+		return;
+
+	cancel_delayed_work(&smp->security_timer);
+
+	smp_distribute_keys(smp);
+}
+
+static void smp_ready_cb(struct l2cap_chan *chan)
+{
+	struct l2cap_conn *conn = chan->conn;
+	struct hci_conn *hcon = conn->hcon;
+
+	bt_dev_dbg(hcon->hdev, "chan %p", chan);
+
+	/* No need to call l2cap_chan_hold() here since we already own
+	 * the reference taken in smp_new_conn_cb(). This is just the
+	 * first time that we tie it to a specific pointer. The code in
+	 * l2cap_core.c ensures that there's no risk this function wont
+	 * get called if smp_new_conn_cb was previously called.
+	 */
+	conn->smp = chan;
+
+	if (hcon->type == ACL_LINK && test_bit(HCI_CONN_ENCRYPT, &hcon->flags))
+		bredr_pairing(chan);
+}
+
+static int smp_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb)
+{
+	int err;
+
+	bt_dev_dbg(chan->conn->hcon->hdev, "chan %p", chan);
+
+	err = smp_sig_channel(chan, skb);
+	if (err) {
+		struct smp_chan *smp = chan->data;
+
+		if (smp)
+			cancel_delayed_work_sync(&smp->security_timer);
+
+		hci_disconnect(chan->conn->hcon, HCI_ERROR_AUTH_FAILURE);
+	}
+
+	return err;
+}
+
+static struct sk_buff *smp_alloc_skb_cb(struct l2cap_chan *chan,
+					unsigned long hdr_len,
+					unsigned long len, int nb)
+{
+	struct sk_buff *skb;
+
+	skb = bt_skb_alloc(hdr_len + len, GFP_KERNEL);
+	if (!skb)
+		return ERR_PTR(-ENOMEM);
+
+	skb->priority = HCI_PRIO_MAX;
+	bt_cb(skb)->l2cap.chan = chan;
+
+	return skb;
+}
+
+static const struct l2cap_ops smp_chan_ops = {
+	.name			= "Security Manager",
+	.ready			= smp_ready_cb,
+	.recv			= smp_recv_cb,
+	.alloc_skb		= smp_alloc_skb_cb,
+	.teardown		= smp_teardown_cb,
+	.resume			= smp_resume_cb,
+
+	.new_connection		= l2cap_chan_no_new_connection,
+	.state_change		= l2cap_chan_no_state_change,
+	.close			= l2cap_chan_no_close,
+	.defer			= l2cap_chan_no_defer,
+	.suspend		= l2cap_chan_no_suspend,
+	.set_shutdown		= l2cap_chan_no_set_shutdown,
+	.get_sndtimeo		= l2cap_chan_no_get_sndtimeo,
+};
+
+static inline struct l2cap_chan *smp_new_conn_cb(struct l2cap_chan *pchan)
+{
+	struct l2cap_chan *chan;
+
+	BT_DBG("pchan %p", pchan);
+
+	chan = l2cap_chan_create();
+	if (!chan)
+		return NULL;
+
+	chan->chan_type	= pchan->chan_type;
+	chan->ops	= &smp_chan_ops;
+	chan->scid	= pchan->scid;
+	chan->dcid	= chan->scid;
+	chan->imtu	= pchan->imtu;
+	chan->omtu	= pchan->omtu;
+	chan->mode	= pchan->mode;
+
+	/* Other L2CAP channels may request SMP routines in order to
+	 * change the security level. This means that the SMP channel
+	 * lock must be considered in its own category to avoid lockdep
+	 * warnings.
+	 */
+	atomic_set(&chan->nesting, L2CAP_NESTING_SMP);
+
+	BT_DBG("created chan %p", chan);
+
+	return chan;
+}
+
+static const struct l2cap_ops smp_root_chan_ops = {
+	.name			= "Security Manager Root",
+	.new_connection		= smp_new_conn_cb,
+
+	/* None of these are implemented for the root channel */
+	.close			= l2cap_chan_no_close,
+	.alloc_skb		= l2cap_chan_no_alloc_skb,
+	.recv			= l2cap_chan_no_recv,
+	.state_change		= l2cap_chan_no_state_change,
+	.teardown		= l2cap_chan_no_teardown,
+	.ready			= l2cap_chan_no_ready,
+	.defer			= l2cap_chan_no_defer,
+	.suspend		= l2cap_chan_no_suspend,
+	.resume			= l2cap_chan_no_resume,
+	.set_shutdown		= l2cap_chan_no_set_shutdown,
+	.get_sndtimeo		= l2cap_chan_no_get_sndtimeo,
+};
+
+static struct l2cap_chan *smp_add_cid(struct hci_dev *hdev, u16 cid)
+{
+	struct l2cap_chan *chan;
+	struct smp_dev *smp;
+	struct crypto_shash *tfm_cmac;
+	struct crypto_kpp *tfm_ecdh;
+
+	if (cid == L2CAP_CID_SMP_BREDR) {
+		smp = NULL;
+		goto create_chan;
+	}
+
+	smp = kzalloc(sizeof(*smp), GFP_KERNEL);
+	if (!smp)
+		return ERR_PTR(-ENOMEM);
+
+	tfm_cmac = crypto_alloc_shash("cmac(aes)", 0, 0);
+	if (IS_ERR(tfm_cmac)) {
+		bt_dev_err(hdev, "Unable to create CMAC crypto context");
+		kfree_sensitive(smp);
+		return ERR_CAST(tfm_cmac);
+	}
+
+	tfm_ecdh = crypto_alloc_kpp("ecdh", 0, 0);
+	if (IS_ERR(tfm_ecdh)) {
+		bt_dev_err(hdev, "Unable to create ECDH crypto context");
+		crypto_free_shash(tfm_cmac);
+		kfree_sensitive(smp);
+		return ERR_CAST(tfm_ecdh);
+	}
+
+	smp->local_oob = false;
+	smp->tfm_cmac = tfm_cmac;
+	smp->tfm_ecdh = tfm_ecdh;
+
+create_chan:
+	chan = l2cap_chan_create();
+	if (!chan) {
+		if (smp) {
+			crypto_free_shash(smp->tfm_cmac);
+			crypto_free_kpp(smp->tfm_ecdh);
+			kfree_sensitive(smp);
+		}
+		return ERR_PTR(-ENOMEM);
+	}
+
+	chan->data = smp;
+
+	l2cap_add_scid(chan, cid);
+
+	l2cap_chan_set_defaults(chan);
+
+	if (cid == L2CAP_CID_SMP) {
+		u8 bdaddr_type;
+
+		hci_copy_identity_address(hdev, &chan->src, &bdaddr_type);
+
+		if (bdaddr_type == ADDR_LE_DEV_PUBLIC)
+			chan->src_type = BDADDR_LE_PUBLIC;
+		else
+			chan->src_type = BDADDR_LE_RANDOM;
+	} else {
+		bacpy(&chan->src, &hdev->bdaddr);
+		chan->src_type = BDADDR_BREDR;
+	}
+
+	chan->state = BT_LISTEN;
+	chan->mode = L2CAP_MODE_BASIC;
+	chan->imtu = L2CAP_DEFAULT_MTU;
+	chan->ops = &smp_root_chan_ops;
+
+	/* Set correct nesting level for a parent/listening channel */
+	atomic_set(&chan->nesting, L2CAP_NESTING_PARENT);
+
+	return chan;
+}
+
+static void smp_del_chan(struct l2cap_chan *chan)
+{
+	struct smp_dev *smp;
+
+	BT_DBG("chan %p", chan);
+
+	smp = chan->data;
+	if (smp) {
+		chan->data = NULL;
+		crypto_free_shash(smp->tfm_cmac);
+		crypto_free_kpp(smp->tfm_ecdh);
+		kfree_sensitive(smp);
+	}
+
+	l2cap_chan_put(chan);
+}
+
+static ssize_t force_bredr_smp_read(struct file *file,
+				    char __user *user_buf,
+				    size_t count, loff_t *ppos)
+{
+	struct hci_dev *hdev = file->private_data;
+	char buf[3];
+
+	buf[0] = hci_dev_test_flag(hdev, HCI_FORCE_BREDR_SMP) ? 'Y': 'N';
+	buf[1] = '\n';
+	buf[2] = '\0';
+	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+}
+
+static ssize_t force_bredr_smp_write(struct file *file,
+				     const char __user *user_buf,
+				     size_t count, loff_t *ppos)
+{
+	struct hci_dev *hdev = file->private_data;
+	bool enable;
+	int err;
+
+	err = kstrtobool_from_user(user_buf, count, &enable);
+	if (err)
+		return err;
+
+	if (enable == hci_dev_test_flag(hdev, HCI_FORCE_BREDR_SMP))
+		return -EALREADY;
+
+	if (enable) {
+		struct l2cap_chan *chan;
+
+		chan = smp_add_cid(hdev, L2CAP_CID_SMP_BREDR);
+		if (IS_ERR(chan))
+			return PTR_ERR(chan);
+
+		hdev->smp_bredr_data = chan;
+	} else {
+		struct l2cap_chan *chan;
+
+		chan = hdev->smp_bredr_data;
+		hdev->smp_bredr_data = NULL;
+		smp_del_chan(chan);
+	}
+
+	hci_dev_change_flag(hdev, HCI_FORCE_BREDR_SMP);
+
+	return count;
+}
+
+static const struct file_operations force_bredr_smp_fops = {
+	.open		= simple_open,
+	.read		= force_bredr_smp_read,
+	.write		= force_bredr_smp_write,
+	.llseek		= default_llseek,
+};
+
+int smp_register(struct hci_dev *hdev)
+{
+	struct l2cap_chan *chan;
+
+	bt_dev_dbg(hdev, "");
+
+	/* If the controller does not support Low Energy operation, then
+	 * there is also no need to register any SMP channel.
+	 */
+	if (!lmp_le_capable(hdev))
+		return 0;
+
+	if (WARN_ON(hdev->smp_data)) {
+		chan = hdev->smp_data;
+		hdev->smp_data = NULL;
+		smp_del_chan(chan);
+	}
+
+	chan = smp_add_cid(hdev, L2CAP_CID_SMP);
+	if (IS_ERR(chan))
+		return PTR_ERR(chan);
+
+	hdev->smp_data = chan;
+
+	/* If the controller does not support BR/EDR Secure Connections
+	 * feature, then the BR/EDR SMP channel shall not be present.
+	 *
+	 * To test this with Bluetooth 4.0 controllers, create a debugfs
+	 * switch that allows forcing BR/EDR SMP support and accepting
+	 * cross-transport pairing on non-AES encrypted connections.
+	 */
+	if (!lmp_sc_capable(hdev)) {
+		debugfs_create_file("force_bredr_smp", 0644, hdev->debugfs,
+				    hdev, &force_bredr_smp_fops);
+
+		/* Flag can be already set here (due to power toggle) */
+		if (!hci_dev_test_flag(hdev, HCI_FORCE_BREDR_SMP))
+			return 0;
+	}
+
+	if (WARN_ON(hdev->smp_bredr_data)) {
+		chan = hdev->smp_bredr_data;
+		hdev->smp_bredr_data = NULL;
+		smp_del_chan(chan);
+	}
+
+	chan = smp_add_cid(hdev, L2CAP_CID_SMP_BREDR);
+	if (IS_ERR(chan)) {
+		int err = PTR_ERR(chan);
+		chan = hdev->smp_data;
+		hdev->smp_data = NULL;
+		smp_del_chan(chan);
+		return err;
+	}
+
+	hdev->smp_bredr_data = chan;
+
+	return 0;
+}
+
+void smp_unregister(struct hci_dev *hdev)
+{
+	struct l2cap_chan *chan;
+
+	if (hdev->smp_bredr_data) {
+		chan = hdev->smp_bredr_data;
+		hdev->smp_bredr_data = NULL;
+		smp_del_chan(chan);
+	}
+
+	if (hdev->smp_data) {
+		chan = hdev->smp_data;
+		hdev->smp_data = NULL;
+		smp_del_chan(chan);
+	}
+}
+
+#if IS_ENABLED(CONFIG_BT_SELFTEST_SMP)
+
+static int __init test_debug_key(struct crypto_kpp *tfm_ecdh)
+{
+	u8 pk[64];
+	int err;
+
+	err = set_ecdh_privkey(tfm_ecdh, debug_sk);
+	if (err)
+		return err;
+
+	err = generate_ecdh_public_key(tfm_ecdh, pk);
+	if (err)
+		return err;
+
+	if (crypto_memneq(pk, debug_pk, 64))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int __init test_ah(void)
+{
+	const u8 irk[16] = {
+			0x9b, 0x7d, 0x39, 0x0a, 0xa6, 0x10, 0x10, 0x34,
+			0x05, 0xad, 0xc8, 0x57, 0xa3, 0x34, 0x02, 0xec };
+	const u8 r[3] = { 0x94, 0x81, 0x70 };
+	const u8 exp[3] = { 0xaa, 0xfb, 0x0d };
+	u8 res[3];
+	int err;
+
+	err = smp_ah(irk, r, res);
+	if (err)
+		return err;
+
+	if (crypto_memneq(res, exp, 3))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int __init test_c1(void)
+{
+	const u8 k[16] = {
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+	const u8 r[16] = {
+			0xe0, 0x2e, 0x70, 0xc6, 0x4e, 0x27, 0x88, 0x63,
+			0x0e, 0x6f, 0xad, 0x56, 0x21, 0xd5, 0x83, 0x57 };
+	const u8 preq[7] = { 0x01, 0x01, 0x00, 0x00, 0x10, 0x07, 0x07 };
+	const u8 pres[7] = { 0x02, 0x03, 0x00, 0x00, 0x08, 0x00, 0x05 };
+	const u8 _iat = 0x01;
+	const u8 _rat = 0x00;
+	const bdaddr_t ra = { { 0xb6, 0xb5, 0xb4, 0xb3, 0xb2, 0xb1 } };
+	const bdaddr_t ia = { { 0xa6, 0xa5, 0xa4, 0xa3, 0xa2, 0xa1 } };
+	const u8 exp[16] = {
+			0x86, 0x3b, 0xf1, 0xbe, 0xc5, 0x4d, 0xa7, 0xd2,
+			0xea, 0x88, 0x89, 0x87, 0xef, 0x3f, 0x1e, 0x1e };
+	u8 res[16];
+	int err;
+
+	err = smp_c1(k, r, preq, pres, _iat, &ia, _rat, &ra, res);
+	if (err)
+		return err;
+
+	if (crypto_memneq(res, exp, 16))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int __init test_s1(void)
+{
+	const u8 k[16] = {
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+	const u8 r1[16] = {
+			0x88, 0x77, 0x66, 0x55, 0x44, 0x33, 0x22, 0x11 };
+	const u8 r2[16] = {
+			0x00, 0xff, 0xee, 0xdd, 0xcc, 0xbb, 0xaa, 0x99 };
+	const u8 exp[16] = {
+			0x62, 0xa0, 0x6d, 0x79, 0xae, 0x16, 0x42, 0x5b,
+			0x9b, 0xf4, 0xb0, 0xe8, 0xf0, 0xe1, 0x1f, 0x9a };
+	u8 res[16];
+	int err;
+
+	err = smp_s1(k, r1, r2, res);
+	if (err)
+		return err;
+
+	if (crypto_memneq(res, exp, 16))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int __init test_f4(struct crypto_shash *tfm_cmac)
+{
+	const u8 u[32] = {
+			0xe6, 0x9d, 0x35, 0x0e, 0x48, 0x01, 0x03, 0xcc,
+			0xdb, 0xfd, 0xf4, 0xac, 0x11, 0x91, 0xf4, 0xef,
+			0xb9, 0xa5, 0xf9, 0xe9, 0xa7, 0x83, 0x2c, 0x5e,
+			0x2c, 0xbe, 0x97, 0xf2, 0xd2, 0x03, 0xb0, 0x20 };
+	const u8 v[32] = {
+			0xfd, 0xc5, 0x7f, 0xf4, 0x49, 0xdd, 0x4f, 0x6b,
+			0xfb, 0x7c, 0x9d, 0xf1, 0xc2, 0x9a, 0xcb, 0x59,
+			0x2a, 0xe7, 0xd4, 0xee, 0xfb, 0xfc, 0x0a, 0x90,
+			0x9a, 0xbb, 0xf6, 0x32, 0x3d, 0x8b, 0x18, 0x55 };
+	const u8 x[16] = {
+			0xab, 0xae, 0x2b, 0x71, 0xec, 0xb2, 0xff, 0xff,
+			0x3e, 0x73, 0x77, 0xd1, 0x54, 0x84, 0xcb, 0xd5 };
+	const u8 z = 0x00;
+	const u8 exp[16] = {
+			0x2d, 0x87, 0x74, 0xa9, 0xbe, 0xa1, 0xed, 0xf1,
+			0x1c, 0xbd, 0xa9, 0x07, 0xf1, 0x16, 0xc9, 0xf2 };
+	u8 res[16];
+	int err;
+
+	err = smp_f4(tfm_cmac, u, v, x, z, res);
+	if (err)
+		return err;
+
+	if (crypto_memneq(res, exp, 16))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int __init test_f5(struct crypto_shash *tfm_cmac)
+{
+	const u8 w[32] = {
+			0x98, 0xa6, 0xbf, 0x73, 0xf3, 0x34, 0x8d, 0x86,
+			0xf1, 0x66, 0xf8, 0xb4, 0x13, 0x6b, 0x79, 0x99,
+			0x9b, 0x7d, 0x39, 0x0a, 0xa6, 0x10, 0x10, 0x34,
+			0x05, 0xad, 0xc8, 0x57, 0xa3, 0x34, 0x02, 0xec };
+	const u8 n1[16] = {
+			0xab, 0xae, 0x2b, 0x71, 0xec, 0xb2, 0xff, 0xff,
+			0x3e, 0x73, 0x77, 0xd1, 0x54, 0x84, 0xcb, 0xd5 };
+	const u8 n2[16] = {
+			0xcf, 0xc4, 0x3d, 0xff, 0xf7, 0x83, 0x65, 0x21,
+			0x6e, 0x5f, 0xa7, 0x25, 0xcc, 0xe7, 0xe8, 0xa6 };
+	const u8 a1[7] = { 0xce, 0xbf, 0x37, 0x37, 0x12, 0x56, 0x00 };
+	const u8 a2[7] = { 0xc1, 0xcf, 0x2d, 0x70, 0x13, 0xa7, 0x00 };
+	const u8 exp_ltk[16] = {
+			0x38, 0x0a, 0x75, 0x94, 0xb5, 0x22, 0x05, 0x98,
+			0x23, 0xcd, 0xd7, 0x69, 0x11, 0x79, 0x86, 0x69 };
+	const u8 exp_mackey[16] = {
+			0x20, 0x6e, 0x63, 0xce, 0x20, 0x6a, 0x3f, 0xfd,
+			0x02, 0x4a, 0x08, 0xa1, 0x76, 0xf1, 0x65, 0x29 };
+	u8 mackey[16], ltk[16];
+	int err;
+
+	err = smp_f5(tfm_cmac, w, n1, n2, a1, a2, mackey, ltk);
+	if (err)
+		return err;
+
+	if (crypto_memneq(mackey, exp_mackey, 16))
+		return -EINVAL;
+
+	if (crypto_memneq(ltk, exp_ltk, 16))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int __init test_f6(struct crypto_shash *tfm_cmac)
+{
+	const u8 w[16] = {
+			0x20, 0x6e, 0x63, 0xce, 0x20, 0x6a, 0x3f, 0xfd,
+			0x02, 0x4a, 0x08, 0xa1, 0x76, 0xf1, 0x65, 0x29 };
+	const u8 n1[16] = {
+			0xab, 0xae, 0x2b, 0x71, 0xec, 0xb2, 0xff, 0xff,
+			0x3e, 0x73, 0x77, 0xd1, 0x54, 0x84, 0xcb, 0xd5 };
+	const u8 n2[16] = {
+			0xcf, 0xc4, 0x3d, 0xff, 0xf7, 0x83, 0x65, 0x21,
+			0x6e, 0x5f, 0xa7, 0x25, 0xcc, 0xe7, 0xe8, 0xa6 };
+	const u8 r[16] = {
+			0xc8, 0x0f, 0x2d, 0x0c, 0xd2, 0x42, 0xda, 0x08,
+			0x54, 0xbb, 0x53, 0xb4, 0x3b, 0x34, 0xa3, 0x12 };
+	const u8 io_cap[3] = { 0x02, 0x01, 0x01 };
+	const u8 a1[7] = { 0xce, 0xbf, 0x37, 0x37, 0x12, 0x56, 0x00 };
+	const u8 a2[7] = { 0xc1, 0xcf, 0x2d, 0x70, 0x13, 0xa7, 0x00 };
+	const u8 exp[16] = {
+			0x61, 0x8f, 0x95, 0xda, 0x09, 0x0b, 0x6c, 0xd2,
+			0xc5, 0xe8, 0xd0, 0x9c, 0x98, 0x73, 0xc4, 0xe3 };
+	u8 res[16];
+	int err;
+
+	err = smp_f6(tfm_cmac, w, n1, n2, r, io_cap, a1, a2, res);
+	if (err)
+		return err;
+
+	if (crypto_memneq(res, exp, 16))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int __init test_g2(struct crypto_shash *tfm_cmac)
+{
+	const u8 u[32] = {
+			0xe6, 0x9d, 0x35, 0x0e, 0x48, 0x01, 0x03, 0xcc,
+			0xdb, 0xfd, 0xf4, 0xac, 0x11, 0x91, 0xf4, 0xef,
+			0xb9, 0xa5, 0xf9, 0xe9, 0xa7, 0x83, 0x2c, 0x5e,
+			0x2c, 0xbe, 0x97, 0xf2, 0xd2, 0x03, 0xb0, 0x20 };
+	const u8 v[32] = {
+			0xfd, 0xc5, 0x7f, 0xf4, 0x49, 0xdd, 0x4f, 0x6b,
+			0xfb, 0x7c, 0x9d, 0xf1, 0xc2, 0x9a, 0xcb, 0x59,
+			0x2a, 0xe7, 0xd4, 0xee, 0xfb, 0xfc, 0x0a, 0x90,
+			0x9a, 0xbb, 0xf6, 0x32, 0x3d, 0x8b, 0x18, 0x55 };
+	const u8 x[16] = {
+			0xab, 0xae, 0x2b, 0x71, 0xec, 0xb2, 0xff, 0xff,
+			0x3e, 0x73, 0x77, 0xd1, 0x54, 0x84, 0xcb, 0xd5 };
+	const u8 y[16] = {
+			0xcf, 0xc4, 0x3d, 0xff, 0xf7, 0x83, 0x65, 0x21,
+			0x6e, 0x5f, 0xa7, 0x25, 0xcc, 0xe7, 0xe8, 0xa6 };
+	const u32 exp_val = 0x2f9ed5ba % 1000000;
+	u32 val;
+	int err;
+
+	err = smp_g2(tfm_cmac, u, v, x, y, &val);
+	if (err)
+		return err;
+
+	if (val != exp_val)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int __init test_h6(struct crypto_shash *tfm_cmac)
+{
+	const u8 w[16] = {
+			0x9b, 0x7d, 0x39, 0x0a, 0xa6, 0x10, 0x10, 0x34,
+			0x05, 0xad, 0xc8, 0x57, 0xa3, 0x34, 0x02, 0xec };
+	const u8 key_id[4] = { 0x72, 0x62, 0x65, 0x6c };
+	const u8 exp[16] = {
+			0x99, 0x63, 0xb1, 0x80, 0xe2, 0xa9, 0xd3, 0xe8,
+			0x1c, 0xc9, 0x6d, 0xe7, 0x02, 0xe1, 0x9a, 0x2d };
+	u8 res[16];
+	int err;
+
+	err = smp_h6(tfm_cmac, w, key_id, res);
+	if (err)
+		return err;
+
+	if (crypto_memneq(res, exp, 16))
+		return -EINVAL;
+
+	return 0;
+}
+
+static char test_smp_buffer[32];
+
+static ssize_t test_smp_read(struct file *file, char __user *user_buf,
+			     size_t count, loff_t *ppos)
+{
+	return simple_read_from_buffer(user_buf, count, ppos, test_smp_buffer,
+				       strlen(test_smp_buffer));
+}
+
+static const struct file_operations test_smp_fops = {
+	.open		= simple_open,
+	.read		= test_smp_read,
+	.llseek		= default_llseek,
+};
+
+static int __init run_selftests(struct crypto_shash *tfm_cmac,
+				struct crypto_kpp *tfm_ecdh)
+{
+	ktime_t calltime, delta, rettime;
+	unsigned long long duration;
+	int err;
+
+	calltime = ktime_get();
+
+	err = test_debug_key(tfm_ecdh);
+	if (err) {
+		BT_ERR("debug_key test failed");
+		goto done;
+	}
+
+	err = test_ah();
+	if (err) {
+		BT_ERR("smp_ah test failed");
+		goto done;
+	}
+
+	err = test_c1();
+	if (err) {
+		BT_ERR("smp_c1 test failed");
+		goto done;
+	}
+
+	err = test_s1();
+	if (err) {
+		BT_ERR("smp_s1 test failed");
+		goto done;
+	}
+
+	err = test_f4(tfm_cmac);
+	if (err) {
+		BT_ERR("smp_f4 test failed");
+		goto done;
+	}
+
+	err = test_f5(tfm_cmac);
+	if (err) {
+		BT_ERR("smp_f5 test failed");
+		goto done;
+	}
+
+	err = test_f6(tfm_cmac);
+	if (err) {
+		BT_ERR("smp_f6 test failed");
+		goto done;
+	}
+
+	err = test_g2(tfm_cmac);
+	if (err) {
+		BT_ERR("smp_g2 test failed");
+		goto done;
+	}
+
+	err = test_h6(tfm_cmac);
+	if (err) {
+		BT_ERR("smp_h6 test failed");
+		goto done;
+	}
+
+	rettime = ktime_get();
+	delta = ktime_sub(rettime, calltime);
+	duration = (unsigned long long) ktime_to_ns(delta) >> 10;
+
+	BT_INFO("SMP test passed in %llu usecs", duration);
+
+done:
+	if (!err)
+		snprintf(test_smp_buffer, sizeof(test_smp_buffer),
+			 "PASS (%llu usecs)\n", duration);
+	else
+		snprintf(test_smp_buffer, sizeof(test_smp_buffer), "FAIL\n");
+
+	debugfs_create_file("selftest_smp", 0444, bt_debugfs, NULL,
+			    &test_smp_fops);
+
+	return err;
+}
+
+int __init bt_selftest_smp(void)
+{
+	struct crypto_shash *tfm_cmac;
+	struct crypto_kpp *tfm_ecdh;
+	int err;
+
+	tfm_cmac = crypto_alloc_shash("cmac(aes)", 0, 0);
+	if (IS_ERR(tfm_cmac)) {
+		BT_ERR("Unable to create CMAC crypto context");
+		return PTR_ERR(tfm_cmac);
+	}
+
+	tfm_ecdh = crypto_alloc_kpp("ecdh", 0, 0);
+	if (IS_ERR(tfm_ecdh)) {
+		BT_ERR("Unable to create ECDH crypto context");
+		crypto_free_shash(tfm_cmac);
+		return PTR_ERR(tfm_ecdh);
+	}
+
+	err = run_selftests(tfm_cmac, tfm_ecdh);
+
+	crypto_free_shash(tfm_cmac);
+	crypto_free_kpp(tfm_ecdh);
+
+	return err;
+}
+
+#endif
diff --git a/net/bluetooth/smp.h b/net/bluetooth/smp.h
new file mode 100644
index 000000000..5fe68e255
--- /dev/null
+++ b/net/bluetooth/smp.h
@@ -0,0 +1,212 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+#ifndef __SMP_H
+#define __SMP_H
+
+struct smp_command_hdr {
+	__u8	code;
+} __packed;
+
+#define SMP_CMD_PAIRING_REQ	0x01
+#define SMP_CMD_PAIRING_RSP	0x02
+struct smp_cmd_pairing {
+	__u8	io_capability;
+	__u8	oob_flag;
+	__u8	auth_req;
+	__u8	max_key_size;
+	__u8	init_key_dist;
+	__u8	resp_key_dist;
+} __packed;
+
+#define SMP_IO_DISPLAY_ONLY	0x00
+#define SMP_IO_DISPLAY_YESNO	0x01
+#define SMP_IO_KEYBOARD_ONLY	0x02
+#define SMP_IO_NO_INPUT_OUTPUT	0x03
+#define SMP_IO_KEYBOARD_DISPLAY	0x04
+
+#define SMP_OOB_NOT_PRESENT	0x00
+#define SMP_OOB_PRESENT		0x01
+
+#define SMP_DIST_ENC_KEY	0x01
+#define SMP_DIST_ID_KEY		0x02
+#define SMP_DIST_SIGN		0x04
+#define SMP_DIST_LINK_KEY	0x08
+
+#define SMP_AUTH_NONE		0x00
+#define SMP_AUTH_BONDING	0x01
+#define SMP_AUTH_MITM		0x04
+#define SMP_AUTH_SC		0x08
+#define SMP_AUTH_KEYPRESS	0x10
+#define SMP_AUTH_CT2		0x20
+
+#define SMP_CMD_PAIRING_CONFIRM	0x03
+struct smp_cmd_pairing_confirm {
+	__u8	confirm_val[16];
+} __packed;
+
+#define SMP_CMD_PAIRING_RANDOM	0x04
+struct smp_cmd_pairing_random {
+	__u8	rand_val[16];
+} __packed;
+
+#define SMP_CMD_PAIRING_FAIL	0x05
+struct smp_cmd_pairing_fail {
+	__u8	reason;
+} __packed;
+
+#define SMP_CMD_ENCRYPT_INFO	0x06
+struct smp_cmd_encrypt_info {
+	__u8	ltk[16];
+} __packed;
+
+#define SMP_CMD_INITIATOR_IDENT	0x07
+struct smp_cmd_initiator_ident {
+	__le16	ediv;
+	__le64	rand;
+} __packed;
+
+#define SMP_CMD_IDENT_INFO	0x08
+struct smp_cmd_ident_info {
+	__u8	irk[16];
+} __packed;
+
+#define SMP_CMD_IDENT_ADDR_INFO	0x09
+struct smp_cmd_ident_addr_info {
+	__u8	addr_type;
+	bdaddr_t bdaddr;
+} __packed;
+
+#define SMP_CMD_SIGN_INFO	0x0a
+struct smp_cmd_sign_info {
+	__u8	csrk[16];
+} __packed;
+
+#define SMP_CMD_SECURITY_REQ	0x0b
+struct smp_cmd_security_req {
+	__u8	auth_req;
+} __packed;
+
+#define SMP_CMD_PUBLIC_KEY	0x0c
+struct smp_cmd_public_key {
+	__u8	x[32];
+	__u8	y[32];
+} __packed;
+
+#define SMP_CMD_DHKEY_CHECK	0x0d
+struct smp_cmd_dhkey_check {
+	__u8	e[16];
+} __packed;
+
+#define SMP_CMD_KEYPRESS_NOTIFY	0x0e
+struct smp_cmd_keypress_notify {
+	__u8	value;
+} __packed;
+
+#define SMP_CMD_MAX		0x0e
+
+#define SMP_PASSKEY_ENTRY_FAILED	0x01
+#define SMP_OOB_NOT_AVAIL		0x02
+#define SMP_AUTH_REQUIREMENTS		0x03
+#define SMP_CONFIRM_FAILED		0x04
+#define SMP_PAIRING_NOTSUPP		0x05
+#define SMP_ENC_KEY_SIZE		0x06
+#define SMP_CMD_NOTSUPP			0x07
+#define SMP_UNSPECIFIED			0x08
+#define SMP_REPEATED_ATTEMPTS		0x09
+#define SMP_INVALID_PARAMS		0x0a
+#define SMP_DHKEY_CHECK_FAILED		0x0b
+#define SMP_NUMERIC_COMP_FAILED		0x0c
+#define SMP_BREDR_PAIRING_IN_PROGRESS	0x0d
+#define SMP_CROSS_TRANSP_NOT_ALLOWED	0x0e
+
+#define SMP_MIN_ENC_KEY_SIZE		7
+#define SMP_MAX_ENC_KEY_SIZE		16
+
+/* LTK types used in internal storage (struct smp_ltk) */
+enum {
+	SMP_STK,
+	SMP_LTK,
+	SMP_LTK_RESPONDER,
+	SMP_LTK_P256,
+	SMP_LTK_P256_DEBUG,
+};
+
+static inline bool smp_ltk_is_sc(struct smp_ltk *key)
+{
+	switch (key->type) {
+	case SMP_LTK_P256:
+	case SMP_LTK_P256_DEBUG:
+		return true;
+	}
+
+	return false;
+}
+
+static inline u8 smp_ltk_sec_level(struct smp_ltk *key)
+{
+	if (key->authenticated) {
+		if (smp_ltk_is_sc(key))
+			return BT_SECURITY_FIPS;
+		else
+			return BT_SECURITY_HIGH;
+	}
+
+	return BT_SECURITY_MEDIUM;
+}
+
+/* Key preferences for smp_sufficient security */
+enum smp_key_pref {
+	SMP_ALLOW_STK,
+	SMP_USE_LTK,
+};
+
+/* SMP Commands */
+int smp_cancel_and_remove_pairing(struct hci_dev *hdev, bdaddr_t *bdaddr,
+				  u8 addr_type);
+bool smp_sufficient_security(struct hci_conn *hcon, u8 sec_level,
+			     enum smp_key_pref key_pref);
+int smp_conn_security(struct hci_conn *hcon, __u8 sec_level);
+int smp_user_confirm_reply(struct hci_conn *conn, u16 mgmt_op, __le32 passkey);
+
+bool smp_irk_matches(struct hci_dev *hdev, const u8 irk[16],
+		     const bdaddr_t *bdaddr);
+int smp_generate_rpa(struct hci_dev *hdev, const u8 irk[16], bdaddr_t *rpa);
+int smp_generate_oob(struct hci_dev *hdev, u8 hash[16], u8 rand[16]);
+
+int smp_register(struct hci_dev *hdev);
+void smp_unregister(struct hci_dev *hdev);
+
+#if IS_ENABLED(CONFIG_BT_SELFTEST_SMP)
+
+int bt_selftest_smp(void);
+
+#else
+
+static inline int bt_selftest_smp(void)
+{
+	return 0;
+}
+
+#endif
+
+#endif /* __SMP_H */