Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 1353 insertions, 0 deletions

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
new file mode 100644
index 000000000..e8c4e9c0c
--- /dev/null
+++ b/net/mac80211/main.c
@@ -0,0 +1,1353 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2013-2014  Intel Mobile Communications GmbH
+ * Copyright (C) 2017     Intel Deutschland GmbH
+ *
+ * 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.
+ */
+
+#include <net/mac80211.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/if_arp.h>
+#include <linux/rtnetlink.h>
+#include <linux/bitmap.h>
+#include <linux/inetdevice.h>
+#include <net/net_namespace.h>
+#include <net/cfg80211.h>
+#include <net/addrconf.h>
+
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "rate.h"
+#include "mesh.h"
+#include "wep.h"
+#include "led.h"
+#include "debugfs.h"
+
+void ieee80211_configure_filter(struct ieee80211_local *local)
+{
+	u64 mc;
+	unsigned int changed_flags;
+	unsigned int new_flags = 0;
+
+	if (atomic_read(&local->iff_allmultis))
+		new_flags |= FIF_ALLMULTI;
+
+	if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
+	    test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
+		new_flags |= FIF_BCN_PRBRESP_PROMISC;
+
+	if (local->fif_probe_req || local->probe_req_reg)
+		new_flags |= FIF_PROBE_REQ;
+
+	if (local->fif_fcsfail)
+		new_flags |= FIF_FCSFAIL;
+
+	if (local->fif_plcpfail)
+		new_flags |= FIF_PLCPFAIL;
+
+	if (local->fif_control)
+		new_flags |= FIF_CONTROL;
+
+	if (local->fif_other_bss)
+		new_flags |= FIF_OTHER_BSS;
+
+	if (local->fif_pspoll)
+		new_flags |= FIF_PSPOLL;
+
+	spin_lock_bh(&local->filter_lock);
+	changed_flags = local->filter_flags ^ new_flags;
+
+	mc = drv_prepare_multicast(local, &local->mc_list);
+	spin_unlock_bh(&local->filter_lock);
+
+	/* be a bit nasty */
+	new_flags |= (1<<31);
+
+	drv_configure_filter(local, changed_flags, &new_flags, mc);
+
+	WARN_ON(new_flags & (1<<31));
+
+	local->filter_flags = new_flags & ~(1<<31);
+}
+
+static void ieee80211_reconfig_filter(struct work_struct *work)
+{
+	struct ieee80211_local *local =
+		container_of(work, struct ieee80211_local, reconfig_filter);
+
+	ieee80211_configure_filter(local);
+}
+
+static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct cfg80211_chan_def chandef = {};
+	u32 changed = 0;
+	int power;
+	u32 offchannel_flag;
+
+	offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
+
+	if (local->scan_chandef.chan) {
+		chandef = local->scan_chandef;
+	} else if (local->tmp_channel) {
+		chandef.chan = local->tmp_channel;
+		chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
+		chandef.center_freq1 = chandef.chan->center_freq;
+	} else
+		chandef = local->_oper_chandef;
+
+	WARN(!cfg80211_chandef_valid(&chandef),
+	     "control:%d MHz width:%d center: %d/%d MHz",
+	     chandef.chan->center_freq, chandef.width,
+	     chandef.center_freq1, chandef.center_freq2);
+
+	if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
+		local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
+	else
+		local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
+
+	offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
+
+	if (offchannel_flag ||
+	    !cfg80211_chandef_identical(&local->hw.conf.chandef,
+					&local->_oper_chandef)) {
+		local->hw.conf.chandef = chandef;
+		changed |= IEEE80211_CONF_CHANGE_CHANNEL;
+	}
+
+	if (!conf_is_ht(&local->hw.conf)) {
+		/*
+		 * mac80211.h documents that this is only valid
+		 * when the channel is set to an HT type, and
+		 * that otherwise STATIC is used.
+		 */
+		local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
+	} else if (local->hw.conf.smps_mode != local->smps_mode) {
+		local->hw.conf.smps_mode = local->smps_mode;
+		changed |= IEEE80211_CONF_CHANGE_SMPS;
+	}
+
+	power = ieee80211_chandef_max_power(&chandef);
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		if (!rcu_access_pointer(sdata->vif.chanctx_conf))
+			continue;
+		if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+			continue;
+		power = min(power, sdata->vif.bss_conf.txpower);
+	}
+	rcu_read_unlock();
+
+	if (local->hw.conf.power_level != power) {
+		changed |= IEEE80211_CONF_CHANGE_POWER;
+		local->hw.conf.power_level = power;
+	}
+
+	return changed;
+}
+
+int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
+{
+	int ret = 0;
+
+	might_sleep();
+
+	if (!local->use_chanctx)
+		changed |= ieee80211_hw_conf_chan(local);
+	else
+		changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
+			     IEEE80211_CONF_CHANGE_POWER);
+
+	if (changed && local->open_count) {
+		ret = drv_config(local, changed);
+		/*
+		 * Goal:
+		 * HW reconfiguration should never fail, the driver has told
+		 * us what it can support so it should live up to that promise.
+		 *
+		 * Current status:
+		 * rfkill is not integrated with mac80211 and a
+		 * configuration command can thus fail if hardware rfkill
+		 * is enabled
+		 *
+		 * FIXME: integrate rfkill with mac80211 and then add this
+		 * WARN_ON() back
+		 *
+		 */
+		/* WARN_ON(ret); */
+	}
+
+	return ret;
+}
+
+void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
+				      u32 changed)
+{
+	struct ieee80211_local *local = sdata->local;
+
+	if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+		return;
+
+	drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
+}
+
+u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
+{
+	sdata->vif.bss_conf.use_cts_prot = false;
+	sdata->vif.bss_conf.use_short_preamble = false;
+	sdata->vif.bss_conf.use_short_slot = false;
+	return BSS_CHANGED_ERP_CTS_PROT |
+	       BSS_CHANGED_ERP_PREAMBLE |
+	       BSS_CHANGED_ERP_SLOT;
+}
+
+static void ieee80211_tasklet_handler(unsigned long data)
+{
+	struct ieee80211_local *local = (struct ieee80211_local *) data;
+	struct sk_buff *skb;
+
+	while ((skb = skb_dequeue(&local->skb_queue)) ||
+	       (skb = skb_dequeue(&local->skb_queue_unreliable))) {
+		switch (skb->pkt_type) {
+		case IEEE80211_RX_MSG:
+			/* Clear skb->pkt_type in order to not confuse kernel
+			 * netstack. */
+			skb->pkt_type = 0;
+			ieee80211_rx(&local->hw, skb);
+			break;
+		case IEEE80211_TX_STATUS_MSG:
+			skb->pkt_type = 0;
+			ieee80211_tx_status(&local->hw, skb);
+			break;
+		default:
+			WARN(1, "mac80211: Packet is of unknown type %d\n",
+			     skb->pkt_type);
+			dev_kfree_skb(skb);
+			break;
+		}
+	}
+}
+
+static void ieee80211_restart_work(struct work_struct *work)
+{
+	struct ieee80211_local *local =
+		container_of(work, struct ieee80211_local, restart_work);
+	struct ieee80211_sub_if_data *sdata;
+
+	/* wait for scan work complete */
+	flush_workqueue(local->workqueue);
+	flush_work(&local->sched_scan_stopped_work);
+
+	WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
+	     "%s called with hardware scan in progress\n", __func__);
+
+	flush_work(&local->radar_detected_work);
+	rtnl_lock();
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		/*
+		 * XXX: there may be more work for other vif types and even
+		 * for station mode: a good thing would be to run most of
+		 * the iface type's dependent _stop (ieee80211_mg_stop,
+		 * ieee80211_ibss_stop) etc...
+		 * For now, fix only the specific bug that was seen: race
+		 * between csa_connection_drop_work and us.
+		 */
+		if (sdata->vif.type == NL80211_IFTYPE_STATION) {
+			/*
+			 * This worker is scheduled from the iface worker that
+			 * runs on mac80211's workqueue, so we can't be
+			 * scheduling this worker after the cancel right here.
+			 * The exception is ieee80211_chswitch_done.
+			 * Then we can have a race...
+			 */
+			cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
+		}
+		flush_delayed_work(&sdata->dec_tailroom_needed_wk);
+	}
+	ieee80211_scan_cancel(local);
+
+	/* make sure any new ROC will consider local->in_reconfig */
+	flush_delayed_work(&local->roc_work);
+	flush_work(&local->hw_roc_done);
+
+	/* wait for all packet processing to be done */
+	synchronize_net();
+
+	ieee80211_reconfig(local);
+	rtnl_unlock();
+}
+
+void ieee80211_restart_hw(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	trace_api_restart_hw(local);
+
+	wiphy_info(hw->wiphy,
+		   "Hardware restart was requested\n");
+
+	/* use this reason, ieee80211_reconfig will unblock it */
+	ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_SUSPEND,
+					false);
+
+	/*
+	 * Stop all Rx during the reconfig. We don't want state changes
+	 * or driver callbacks while this is in progress.
+	 */
+	local->in_reconfig = true;
+	barrier();
+
+	queue_work(system_freezable_wq, &local->restart_work);
+}
+EXPORT_SYMBOL(ieee80211_restart_hw);
+
+#ifdef CONFIG_INET
+static int ieee80211_ifa_changed(struct notifier_block *nb,
+				 unsigned long data, void *arg)
+{
+	struct in_ifaddr *ifa = arg;
+	struct ieee80211_local *local =
+		container_of(nb, struct ieee80211_local,
+			     ifa_notifier);
+	struct net_device *ndev = ifa->ifa_dev->dev;
+	struct wireless_dev *wdev = ndev->ieee80211_ptr;
+	struct in_device *idev;
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_bss_conf *bss_conf;
+	struct ieee80211_if_managed *ifmgd;
+	int c = 0;
+
+	/* Make sure it's our interface that got changed */
+	if (!wdev)
+		return NOTIFY_DONE;
+
+	if (wdev->wiphy != local->hw.wiphy)
+		return NOTIFY_DONE;
+
+	sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
+	bss_conf = &sdata->vif.bss_conf;
+
+	/* ARP filtering is only supported in managed mode */
+	if (sdata->vif.type != NL80211_IFTYPE_STATION)
+		return NOTIFY_DONE;
+
+	idev = __in_dev_get_rtnl(sdata->dev);
+	if (!idev)
+		return NOTIFY_DONE;
+
+	ifmgd = &sdata->u.mgd;
+	sdata_lock(sdata);
+
+	/* Copy the addresses to the bss_conf list */
+	ifa = idev->ifa_list;
+	while (ifa) {
+		if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
+			bss_conf->arp_addr_list[c] = ifa->ifa_address;
+		ifa = ifa->ifa_next;
+		c++;
+	}
+
+	bss_conf->arp_addr_cnt = c;
+
+	/* Configure driver only if associated (which also implies it is up) */
+	if (ifmgd->associated)
+		ieee80211_bss_info_change_notify(sdata,
+						 BSS_CHANGED_ARP_FILTER);
+
+	sdata_unlock(sdata);
+
+	return NOTIFY_OK;
+}
+#endif
+
+#if IS_ENABLED(CONFIG_IPV6)
+static int ieee80211_ifa6_changed(struct notifier_block *nb,
+				  unsigned long data, void *arg)
+{
+	struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
+	struct inet6_dev *idev = ifa->idev;
+	struct net_device *ndev = ifa->idev->dev;
+	struct ieee80211_local *local =
+		container_of(nb, struct ieee80211_local, ifa6_notifier);
+	struct wireless_dev *wdev = ndev->ieee80211_ptr;
+	struct ieee80211_sub_if_data *sdata;
+
+	/* Make sure it's our interface that got changed */
+	if (!wdev || wdev->wiphy != local->hw.wiphy)
+		return NOTIFY_DONE;
+
+	sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
+
+	/*
+	 * For now only support station mode. This is mostly because
+	 * doing AP would have to handle AP_VLAN in some way ...
+	 */
+	if (sdata->vif.type != NL80211_IFTYPE_STATION)
+		return NOTIFY_DONE;
+
+	drv_ipv6_addr_change(local, sdata, idev);
+
+	return NOTIFY_OK;
+}
+#endif
+
+/* There isn't a lot of sense in it, but you can transmit anything you like */
+static const struct ieee80211_txrx_stypes
+ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
+	[NL80211_IFTYPE_ADHOC] = {
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
+			BIT(IEEE80211_STYPE_AUTH >> 4) |
+			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
+			BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
+	},
+	[NL80211_IFTYPE_STATION] = {
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
+			BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
+	},
+	[NL80211_IFTYPE_AP] = {
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
+			BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
+			BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
+			BIT(IEEE80211_STYPE_DISASSOC >> 4) |
+			BIT(IEEE80211_STYPE_AUTH >> 4) |
+			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
+			BIT(IEEE80211_STYPE_ACTION >> 4),
+	},
+	[NL80211_IFTYPE_AP_VLAN] = {
+		/* copy AP */
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
+			BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
+			BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
+			BIT(IEEE80211_STYPE_DISASSOC >> 4) |
+			BIT(IEEE80211_STYPE_AUTH >> 4) |
+			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
+			BIT(IEEE80211_STYPE_ACTION >> 4),
+	},
+	[NL80211_IFTYPE_P2P_CLIENT] = {
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
+			BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
+	},
+	[NL80211_IFTYPE_P2P_GO] = {
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
+			BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
+			BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
+			BIT(IEEE80211_STYPE_DISASSOC >> 4) |
+			BIT(IEEE80211_STYPE_AUTH >> 4) |
+			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
+			BIT(IEEE80211_STYPE_ACTION >> 4),
+	},
+	[NL80211_IFTYPE_MESH_POINT] = {
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
+			BIT(IEEE80211_STYPE_AUTH >> 4) |
+			BIT(IEEE80211_STYPE_DEAUTH >> 4),
+	},
+	[NL80211_IFTYPE_P2P_DEVICE] = {
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
+			BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
+	},
+};
+
+static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
+	.ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
+			     IEEE80211_HT_AMPDU_PARM_DENSITY,
+
+	.cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
+				IEEE80211_HT_CAP_MAX_AMSDU |
+				IEEE80211_HT_CAP_SGI_20 |
+				IEEE80211_HT_CAP_SGI_40 |
+				IEEE80211_HT_CAP_LDPC_CODING |
+				IEEE80211_HT_CAP_40MHZ_INTOLERANT),
+	.mcs = {
+		.rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
+			     0xff, 0xff, 0xff, 0xff, 0xff, },
+	},
+};
+
+static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
+	.vht_cap_info =
+		cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
+			    IEEE80211_VHT_CAP_SHORT_GI_80 |
+			    IEEE80211_VHT_CAP_SHORT_GI_160 |
+			    IEEE80211_VHT_CAP_RXSTBC_MASK |
+			    IEEE80211_VHT_CAP_TXSTBC |
+			    IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
+			    IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
+			    IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
+			    IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
+			    IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
+	.supp_mcs = {
+		.rx_mcs_map = cpu_to_le16(~0),
+		.tx_mcs_map = cpu_to_le16(~0),
+	},
+};
+
+struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
+					   const struct ieee80211_ops *ops,
+					   const char *requested_name)
+{
+	struct ieee80211_local *local;
+	int priv_size, i;
+	struct wiphy *wiphy;
+	bool use_chanctx;
+
+	if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
+		    !ops->add_interface || !ops->remove_interface ||
+		    !ops->configure_filter))
+		return NULL;
+
+	if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
+		return NULL;
+
+	/* check all or no channel context operations exist */
+	i = !!ops->add_chanctx + !!ops->remove_chanctx +
+	    !!ops->change_chanctx + !!ops->assign_vif_chanctx +
+	    !!ops->unassign_vif_chanctx;
+	if (WARN_ON(i != 0 && i != 5))
+		return NULL;
+	use_chanctx = i == 5;
+
+	/* Ensure 32-byte alignment of our private data and hw private data.
+	 * We use the wiphy priv data for both our ieee80211_local and for
+	 * the driver's private data
+	 *
+	 * In memory it'll be like this:
+	 *
+	 * +-------------------------+
+	 * | struct wiphy	    |
+	 * +-------------------------+
+	 * | struct ieee80211_local  |
+	 * +-------------------------+
+	 * | driver's private data   |
+	 * +-------------------------+
+	 *
+	 */
+	priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
+
+	wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
+
+	if (!wiphy)
+		return NULL;
+
+	wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
+
+	wiphy->privid = mac80211_wiphy_privid;
+
+	wiphy->flags |= WIPHY_FLAG_NETNS_OK |
+			WIPHY_FLAG_4ADDR_AP |
+			WIPHY_FLAG_4ADDR_STATION |
+			WIPHY_FLAG_REPORTS_OBSS |
+			WIPHY_FLAG_OFFCHAN_TX;
+
+	if (ops->remain_on_channel)
+		wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
+
+	wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
+			   NL80211_FEATURE_SAE |
+			   NL80211_FEATURE_HT_IBSS |
+			   NL80211_FEATURE_VIF_TXPOWER |
+			   NL80211_FEATURE_MAC_ON_CREATE |
+			   NL80211_FEATURE_USERSPACE_MPM |
+			   NL80211_FEATURE_FULL_AP_CLIENT_STATE;
+	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
+	wiphy_ext_feature_set(wiphy,
+			      NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
+
+	if (!ops->hw_scan) {
+		wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
+				   NL80211_FEATURE_AP_SCAN;
+		/*
+		 * if the driver behaves correctly using the probe request
+		 * (template) from mac80211, then both of these should be
+		 * supported even with hw scan - but let drivers opt in.
+		 */
+		wiphy_ext_feature_set(wiphy,
+				      NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
+		wiphy_ext_feature_set(wiphy,
+				      NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
+	}
+
+	if (!ops->set_key)
+		wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
+
+	if (ops->wake_tx_queue)
+		wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
+
+	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
+
+	wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
+
+	local = wiphy_priv(wiphy);
+
+	if (sta_info_init(local))
+		goto err_free;
+
+	local->hw.wiphy = wiphy;
+
+	local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
+
+	local->ops = ops;
+	local->use_chanctx = use_chanctx;
+
+	/* set up some defaults */
+	local->hw.queues = 1;
+	local->hw.max_rates = 1;
+	local->hw.max_report_rates = 0;
+	local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
+	local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
+	local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
+	local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
+	local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
+	local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
+					 IEEE80211_RADIOTAP_MCS_HAVE_GI |
+					 IEEE80211_RADIOTAP_MCS_HAVE_BW;
+	local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
+					 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
+	local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
+	local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
+	local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
+	wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
+	wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
+
+	local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
+
+	wiphy->extended_capabilities = local->ext_capa;
+	wiphy->extended_capabilities_mask = local->ext_capa;
+	wiphy->extended_capabilities_len =
+		ARRAY_SIZE(local->ext_capa);
+
+	INIT_LIST_HEAD(&local->interfaces);
+	INIT_LIST_HEAD(&local->mon_list);
+
+	__hw_addr_init(&local->mc_list);
+
+	mutex_init(&local->iflist_mtx);
+	mutex_init(&local->mtx);
+
+	mutex_init(&local->key_mtx);
+	spin_lock_init(&local->filter_lock);
+	spin_lock_init(&local->rx_path_lock);
+	spin_lock_init(&local->queue_stop_reason_lock);
+
+	INIT_LIST_HEAD(&local->chanctx_list);
+	mutex_init(&local->chanctx_mtx);
+
+	INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
+
+	INIT_WORK(&local->restart_work, ieee80211_restart_work);
+
+	INIT_WORK(&local->radar_detected_work,
+		  ieee80211_dfs_radar_detected_work);
+
+	INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
+	local->smps_mode = IEEE80211_SMPS_OFF;
+
+	INIT_WORK(&local->dynamic_ps_enable_work,
+		  ieee80211_dynamic_ps_enable_work);
+	INIT_WORK(&local->dynamic_ps_disable_work,
+		  ieee80211_dynamic_ps_disable_work);
+	timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
+
+	INIT_WORK(&local->sched_scan_stopped_work,
+		  ieee80211_sched_scan_stopped_work);
+
+	INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
+
+	spin_lock_init(&local->ack_status_lock);
+	idr_init(&local->ack_status_frames);
+
+	for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
+		skb_queue_head_init(&local->pending[i]);
+		atomic_set(&local->agg_queue_stop[i], 0);
+	}
+	tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
+		     (unsigned long)local);
+
+	tasklet_init(&local->tasklet,
+		     ieee80211_tasklet_handler,
+		     (unsigned long) local);
+
+	skb_queue_head_init(&local->skb_queue);
+	skb_queue_head_init(&local->skb_queue_unreliable);
+	skb_queue_head_init(&local->skb_queue_tdls_chsw);
+
+	ieee80211_alloc_led_names(local);
+
+	ieee80211_roc_setup(local);
+
+	local->hw.radiotap_timestamp.units_pos = -1;
+	local->hw.radiotap_timestamp.accuracy = -1;
+
+	return &local->hw;
+ err_free:
+	wiphy_free(wiphy);
+	return NULL;
+}
+EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
+
+static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
+{
+	bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
+			  IS_ERR(local->wep_rx_tfm));
+	bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
+	int n_suites = 0, r = 0, w = 0;
+	u32 *suites;
+	static const u32 cipher_suites[] = {
+		/* keep WEP first, it may be removed below */
+		WLAN_CIPHER_SUITE_WEP40,
+		WLAN_CIPHER_SUITE_WEP104,
+		WLAN_CIPHER_SUITE_TKIP,
+		WLAN_CIPHER_SUITE_CCMP,
+		WLAN_CIPHER_SUITE_CCMP_256,
+		WLAN_CIPHER_SUITE_GCMP,
+		WLAN_CIPHER_SUITE_GCMP_256,
+
+		/* keep last -- depends on hw flags! */
+		WLAN_CIPHER_SUITE_AES_CMAC,
+		WLAN_CIPHER_SUITE_BIP_CMAC_256,
+		WLAN_CIPHER_SUITE_BIP_GMAC_128,
+		WLAN_CIPHER_SUITE_BIP_GMAC_256,
+	};
+
+	if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
+	    local->hw.wiphy->cipher_suites) {
+		/* If the driver advertises, or doesn't support SW crypto,
+		 * we only need to remove WEP if necessary.
+		 */
+		if (have_wep)
+			return 0;
+
+		/* well if it has _no_ ciphers ... fine */
+		if (!local->hw.wiphy->n_cipher_suites)
+			return 0;
+
+		/* Driver provides cipher suites, but we need to exclude WEP */
+		suites = kmemdup(local->hw.wiphy->cipher_suites,
+				 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
+				 GFP_KERNEL);
+		if (!suites)
+			return -ENOMEM;
+
+		for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
+			u32 suite = local->hw.wiphy->cipher_suites[r];
+
+			if (suite == WLAN_CIPHER_SUITE_WEP40 ||
+			    suite == WLAN_CIPHER_SUITE_WEP104)
+				continue;
+			suites[w++] = suite;
+		}
+	} else if (!local->hw.cipher_schemes) {
+		/* If the driver doesn't have cipher schemes, there's nothing
+		 * else to do other than assign the (software supported and
+		 * perhaps offloaded) cipher suites.
+		 */
+		local->hw.wiphy->cipher_suites = cipher_suites;
+		local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
+
+		if (!have_mfp)
+			local->hw.wiphy->n_cipher_suites -= 4;
+
+		if (!have_wep) {
+			local->hw.wiphy->cipher_suites += 2;
+			local->hw.wiphy->n_cipher_suites -= 2;
+		}
+
+		/* not dynamically allocated, so just return */
+		return 0;
+	} else {
+		const struct ieee80211_cipher_scheme *cs;
+
+		cs = local->hw.cipher_schemes;
+
+		/* Driver specifies cipher schemes only (but not cipher suites
+		 * including the schemes)
+		 *
+		 * We start counting ciphers defined by schemes, TKIP, CCMP,
+		 * CCMP-256, GCMP, and GCMP-256
+		 */
+		n_suites = local->hw.n_cipher_schemes + 5;
+
+		/* check if we have WEP40 and WEP104 */
+		if (have_wep)
+			n_suites += 2;
+
+		/* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
+		 * BIP-GMAC-256
+		 */
+		if (have_mfp)
+			n_suites += 4;
+
+		suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
+		if (!suites)
+			return -ENOMEM;
+
+		suites[w++] = WLAN_CIPHER_SUITE_CCMP;
+		suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
+		suites[w++] = WLAN_CIPHER_SUITE_TKIP;
+		suites[w++] = WLAN_CIPHER_SUITE_GCMP;
+		suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
+
+		if (have_wep) {
+			suites[w++] = WLAN_CIPHER_SUITE_WEP40;
+			suites[w++] = WLAN_CIPHER_SUITE_WEP104;
+		}
+
+		if (have_mfp) {
+			suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
+			suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
+			suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
+			suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
+		}
+
+		for (r = 0; r < local->hw.n_cipher_schemes; r++) {
+			suites[w++] = cs[r].cipher;
+			if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
+				kfree(suites);
+				return -EINVAL;
+			}
+		}
+	}
+
+	local->hw.wiphy->cipher_suites = suites;
+	local->hw.wiphy->n_cipher_suites = w;
+	local->wiphy_ciphers_allocated = true;
+
+	return 0;
+}
+
+int ieee80211_register_hw(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	int result, i;
+	enum nl80211_band band;
+	int channels, max_bitrates;
+	bool supp_ht, supp_vht, supp_he;
+	netdev_features_t feature_whitelist;
+	struct cfg80211_chan_def dflt_chandef = {};
+
+	if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
+	    (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
+	     local->hw.offchannel_tx_hw_queue >= local->hw.queues))
+		return -EINVAL;
+
+	if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
+	    (!local->ops->tdls_channel_switch ||
+	     !local->ops->tdls_cancel_channel_switch ||
+	     !local->ops->tdls_recv_channel_switch))
+		return -EOPNOTSUPP;
+
+	if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
+		    !local->ops->set_frag_threshold))
+		return -EINVAL;
+
+	if (WARN_ON(local->hw.wiphy->interface_modes &
+			BIT(NL80211_IFTYPE_NAN) &&
+		    (!local->ops->start_nan || !local->ops->stop_nan)))
+		return -EINVAL;
+
+#ifdef CONFIG_PM
+	if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
+		return -EINVAL;
+#endif
+
+	if (!local->use_chanctx) {
+		for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
+			const struct ieee80211_iface_combination *comb;
+
+			comb = &local->hw.wiphy->iface_combinations[i];
+
+			if (comb->num_different_channels > 1)
+				return -EINVAL;
+		}
+	} else {
+		/*
+		 * WDS is currently prohibited when channel contexts are used
+		 * because there's no clear definition of which channel WDS
+		 * type interfaces use
+		 */
+		if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
+			return -EINVAL;
+
+		/* DFS is not supported with multi-channel combinations yet */
+		for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
+			const struct ieee80211_iface_combination *comb;
+
+			comb = &local->hw.wiphy->iface_combinations[i];
+
+			if (comb->radar_detect_widths &&
+			    comb->num_different_channels > 1)
+				return -EINVAL;
+		}
+	}
+
+	/* Only HW csum features are currently compatible with mac80211 */
+	feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
+			    NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
+			    NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
+	if (WARN_ON(hw->netdev_features & ~feature_whitelist))
+		return -EINVAL;
+
+	if (hw->max_report_rates == 0)
+		hw->max_report_rates = hw->max_rates;
+
+	local->rx_chains = 1;
+
+	/*
+	 * generic code guarantees at least one band,
+	 * set this very early because much code assumes
+	 * that hw.conf.channel is assigned
+	 */
+	channels = 0;
+	max_bitrates = 0;
+	supp_ht = false;
+	supp_vht = false;
+	supp_he = false;
+	for (band = 0; band < NUM_NL80211_BANDS; band++) {
+		struct ieee80211_supported_band *sband;
+
+		sband = local->hw.wiphy->bands[band];
+		if (!sband)
+			continue;
+
+		if (!dflt_chandef.chan) {
+			/*
+			 * Assign the first enabled channel to dflt_chandef
+			 * from the list of channels
+			 */
+			for (i = 0; i < sband->n_channels; i++)
+				if (!(sband->channels[i].flags &
+						IEEE80211_CHAN_DISABLED))
+					break;
+			/* if none found then use the first anyway */
+			if (i == sband->n_channels)
+				i = 0;
+			cfg80211_chandef_create(&dflt_chandef,
+						&sband->channels[i],
+						NL80211_CHAN_NO_HT);
+			/* init channel we're on */
+			if (!local->use_chanctx && !local->_oper_chandef.chan) {
+				local->hw.conf.chandef = dflt_chandef;
+				local->_oper_chandef = dflt_chandef;
+			}
+			local->monitor_chandef = dflt_chandef;
+		}
+
+		channels += sband->n_channels;
+
+		if (max_bitrates < sband->n_bitrates)
+			max_bitrates = sband->n_bitrates;
+		supp_ht = supp_ht || sband->ht_cap.ht_supported;
+		supp_vht = supp_vht || sband->vht_cap.vht_supported;
+
+		if (!supp_he)
+			supp_he = !!ieee80211_get_he_sta_cap(sband);
+
+		if (!sband->ht_cap.ht_supported)
+			continue;
+
+		/* TODO: consider VHT for RX chains, hopefully it's the same */
+		local->rx_chains =
+			max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
+			    local->rx_chains);
+
+		/* no need to mask, SM_PS_DISABLED has all bits set */
+		sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
+			             IEEE80211_HT_CAP_SM_PS_SHIFT;
+	}
+
+	/* if low-level driver supports AP, we also support VLAN.
+	 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
+	 * based on their support to transmit SW encrypted packets.
+	 */
+	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
+	    !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
+		hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
+		hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
+	}
+
+	/* mac80211 always supports monitor */
+	hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
+	hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
+
+	/* mac80211 doesn't support more than one IBSS interface right now */
+	for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
+		const struct ieee80211_iface_combination *c;
+		int j;
+
+		c = &hw->wiphy->iface_combinations[i];
+
+		for (j = 0; j < c->n_limits; j++)
+			if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
+			    c->limits[j].max > 1)
+				return -EINVAL;
+	}
+
+	local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
+				      sizeof(void *) * channels, GFP_KERNEL);
+	if (!local->int_scan_req)
+		return -ENOMEM;
+
+	for (band = 0; band < NUM_NL80211_BANDS; band++) {
+		if (!local->hw.wiphy->bands[band])
+			continue;
+		local->int_scan_req->rates[band] = (u32) -1;
+	}
+
+#ifndef CONFIG_MAC80211_MESH
+	/* mesh depends on Kconfig, but drivers should set it if they want */
+	local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
+#endif
+
+	/* if the underlying driver supports mesh, mac80211 will (at least)
+	 * provide routing of mesh authentication frames to userspace */
+	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
+		local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
+
+	/* mac80211 supports control port protocol changing */
+	local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
+
+	if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
+		local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
+	} else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
+		local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
+		if (hw->max_signal <= 0) {
+			result = -EINVAL;
+			goto fail_wiphy_register;
+		}
+	}
+
+	/*
+	 * Calculate scan IE length -- we need this to alloc
+	 * memory and to subtract from the driver limit. It
+	 * includes the DS Params, (extended) supported rates, and HT
+	 * information -- SSID is the driver's responsibility.
+	 */
+	local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
+		3 /* DS Params */;
+	if (supp_ht)
+		local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
+
+	if (supp_vht)
+		local->scan_ies_len +=
+			2 + sizeof(struct ieee80211_vht_cap);
+
+	/* HE cap element is variable in size - set len to allow max size */
+	/*
+	 * TODO: 1 is added at the end of the calculation to accommodate for
+	 *	the temporary placing of the HE capabilities IE under EXT.
+	 *	Remove it once it is placed in the final place.
+	 */
+	if (supp_he)
+		local->scan_ies_len +=
+			2 + sizeof(struct ieee80211_he_cap_elem) +
+			sizeof(struct ieee80211_he_mcs_nss_supp) +
+			IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
+
+	if (!local->ops->hw_scan) {
+		/* For hw_scan, driver needs to set these up. */
+		local->hw.wiphy->max_scan_ssids = 4;
+		local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
+	}
+
+	/*
+	 * If the driver supports any scan IEs, then assume the
+	 * limit includes the IEs mac80211 will add, otherwise
+	 * leave it at zero and let the driver sort it out; we
+	 * still pass our IEs to the driver but userspace will
+	 * not be allowed to in that case.
+	 */
+	if (local->hw.wiphy->max_scan_ie_len)
+		local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
+
+	if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
+					     local->hw.n_cipher_schemes))) {
+		result = -EINVAL;
+		goto fail_workqueue;
+	}
+
+	result = ieee80211_init_cipher_suites(local);
+	if (result < 0)
+		goto fail_wiphy_register;
+
+	if (!local->ops->remain_on_channel)
+		local->hw.wiphy->max_remain_on_channel_duration = 5000;
+
+	/* mac80211 based drivers don't support internal TDLS setup */
+	if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
+		local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
+
+	/* mac80211 supports eCSA, if the driver supports STA CSA at all */
+	if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
+		local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
+
+	local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
+
+	result = wiphy_register(local->hw.wiphy);
+	if (result < 0)
+		goto fail_wiphy_register;
+
+	/*
+	 * We use the number of queues for feature tests (QoS, HT) internally
+	 * so restrict them appropriately.
+	 */
+	if (hw->queues > IEEE80211_MAX_QUEUES)
+		hw->queues = IEEE80211_MAX_QUEUES;
+
+	local->workqueue =
+		alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
+	if (!local->workqueue) {
+		result = -ENOMEM;
+		goto fail_workqueue;
+	}
+
+	/*
+	 * The hardware needs headroom for sending the frame,
+	 * and we need some headroom for passing the frame to monitor
+	 * interfaces, but never both at the same time.
+	 */
+	local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
+				   IEEE80211_TX_STATUS_HEADROOM);
+
+	debugfs_hw_add(local);
+
+	/*
+	 * if the driver doesn't specify a max listen interval we
+	 * use 5 which should be a safe default
+	 */
+	if (local->hw.max_listen_interval == 0)
+		local->hw.max_listen_interval = 5;
+
+	local->hw.conf.listen_interval = local->hw.max_listen_interval;
+
+	local->dynamic_ps_forced_timeout = -1;
+
+	if (!local->hw.max_nan_de_entries)
+		local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
+
+	result = ieee80211_wep_init(local);
+	if (result < 0)
+		wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
+			    result);
+
+	local->hw.conf.flags = IEEE80211_CONF_IDLE;
+
+	ieee80211_led_init(local);
+
+	result = ieee80211_txq_setup_flows(local);
+	if (result)
+		goto fail_flows;
+
+	rtnl_lock();
+
+	result = ieee80211_init_rate_ctrl_alg(local,
+					      hw->rate_control_algorithm);
+	if (result < 0) {
+		wiphy_debug(local->hw.wiphy,
+			    "Failed to initialize rate control algorithm\n");
+		goto fail_rate;
+	}
+
+	/* add one default STA interface if supported */
+	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
+	    !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
+		result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
+					  NL80211_IFTYPE_STATION, NULL);
+		if (result)
+			wiphy_warn(local->hw.wiphy,
+				   "Failed to add default virtual iface\n");
+	}
+
+	rtnl_unlock();
+
+#ifdef CONFIG_INET
+	local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
+	result = register_inetaddr_notifier(&local->ifa_notifier);
+	if (result)
+		goto fail_ifa;
+#endif
+
+#if IS_ENABLED(CONFIG_IPV6)
+	local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
+	result = register_inet6addr_notifier(&local->ifa6_notifier);
+	if (result)
+		goto fail_ifa6;
+#endif
+
+	return 0;
+
+#if IS_ENABLED(CONFIG_IPV6)
+ fail_ifa6:
+#ifdef CONFIG_INET
+	unregister_inetaddr_notifier(&local->ifa_notifier);
+#endif
+#endif
+#if defined(CONFIG_INET) || defined(CONFIG_IPV6)
+ fail_ifa:
+#endif
+	rtnl_lock();
+	rate_control_deinitialize(local);
+	ieee80211_remove_interfaces(local);
+ fail_rate:
+	rtnl_unlock();
+	ieee80211_led_exit(local);
+	ieee80211_wep_free(local);
+ fail_flows:
+	destroy_workqueue(local->workqueue);
+ fail_workqueue:
+	wiphy_unregister(local->hw.wiphy);
+ fail_wiphy_register:
+	if (local->wiphy_ciphers_allocated)
+		kfree(local->hw.wiphy->cipher_suites);
+	kfree(local->int_scan_req);
+	return result;
+}
+EXPORT_SYMBOL(ieee80211_register_hw);
+
+void ieee80211_unregister_hw(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	tasklet_kill(&local->tx_pending_tasklet);
+	tasklet_kill(&local->tasklet);
+
+#ifdef CONFIG_INET
+	unregister_inetaddr_notifier(&local->ifa_notifier);
+#endif
+#if IS_ENABLED(CONFIG_IPV6)
+	unregister_inet6addr_notifier(&local->ifa6_notifier);
+#endif
+
+	rtnl_lock();
+
+	/*
+	 * At this point, interface list manipulations are fine
+	 * because the driver cannot be handing us frames any
+	 * more and the tasklet is killed.
+	 */
+	ieee80211_remove_interfaces(local);
+
+	rtnl_unlock();
+
+	cancel_delayed_work_sync(&local->roc_work);
+	cancel_work_sync(&local->restart_work);
+	cancel_work_sync(&local->reconfig_filter);
+	cancel_work_sync(&local->tdls_chsw_work);
+	flush_work(&local->sched_scan_stopped_work);
+	flush_work(&local->radar_detected_work);
+
+	ieee80211_clear_tx_pending(local);
+	rate_control_deinitialize(local);
+
+	if (skb_queue_len(&local->skb_queue) ||
+	    skb_queue_len(&local->skb_queue_unreliable))
+		wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
+	skb_queue_purge(&local->skb_queue);
+	skb_queue_purge(&local->skb_queue_unreliable);
+	skb_queue_purge(&local->skb_queue_tdls_chsw);
+
+	destroy_workqueue(local->workqueue);
+	wiphy_unregister(local->hw.wiphy);
+	ieee80211_wep_free(local);
+	ieee80211_led_exit(local);
+	kfree(local->int_scan_req);
+}
+EXPORT_SYMBOL(ieee80211_unregister_hw);
+
+static int ieee80211_free_ack_frame(int id, void *p, void *data)
+{
+	WARN_ONCE(1, "Have pending ack frames!\n");
+	kfree_skb(p);
+	return 0;
+}
+
+void ieee80211_free_hw(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	mutex_destroy(&local->iflist_mtx);
+	mutex_destroy(&local->mtx);
+
+	if (local->wiphy_ciphers_allocated)
+		kfree(local->hw.wiphy->cipher_suites);
+
+	idr_for_each(&local->ack_status_frames,
+		     ieee80211_free_ack_frame, NULL);
+	idr_destroy(&local->ack_status_frames);
+
+	sta_info_stop(local);
+
+	ieee80211_free_led_names(local);
+
+	wiphy_free(local->hw.wiphy);
+}
+EXPORT_SYMBOL(ieee80211_free_hw);
+
+static int __init ieee80211_init(void)
+{
+	struct sk_buff *skb;
+	int ret;
+
+	BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
+	BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
+		     IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
+
+	ret = rc80211_minstrel_init();
+	if (ret)
+		return ret;
+
+	ret = rc80211_minstrel_ht_init();
+	if (ret)
+		goto err_minstrel;
+
+	ret = ieee80211_iface_init();
+	if (ret)
+		goto err_netdev;
+
+	return 0;
+ err_netdev:
+	rc80211_minstrel_ht_exit();
+ err_minstrel:
+	rc80211_minstrel_exit();
+
+	return ret;
+}
+
+static void __exit ieee80211_exit(void)
+{
+	rc80211_minstrel_ht_exit();
+	rc80211_minstrel_exit();
+
+	ieee80211s_stop();
+
+	ieee80211_iface_exit();
+
+	rcu_barrier();
+}
+
+
+subsys_initcall(ieee80211_init);
+module_exit(ieee80211_exit);
+
+MODULE_DESCRIPTION("IEEE 802.11 subsystem");
+MODULE_LICENSE("GPL");