1 files changed, 33 insertions, 13 deletions

diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index b90ee68bb..5ce71c483 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -32,6 +32,10 @@ static void hci_cmd_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
 	hdev->req_result = result;
 	hdev->req_status = HCI_REQ_DONE;
 
+	/* Free the request command so it is not used as response */
+	kfree_skb(hdev->req_skb);
+	hdev->req_skb = NULL;
+
 	if (skb) {
 		struct sock *sk = hci_skb_sk(skb);
 
@@ -39,7 +43,7 @@ static void hci_cmd_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
 		if (sk)
 			sock_put(sk);
 
-		hdev->req_skb = skb_get(skb);
+		hdev->req_rsp = skb_get(skb);
 	}
 
 	wake_up_interruptible(&hdev->req_wait_q);
@@ -187,8 +191,8 @@ struct sk_buff *__hci_cmd_sync_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
 
 	hdev->req_status = 0;
 	hdev->req_result = 0;
-	skb = hdev->req_skb;
-	hdev->req_skb = NULL;
+	skb = hdev->req_rsp;
+	hdev->req_rsp = NULL;
 
 	bt_dev_dbg(hdev, "end: err %d", err);
 
@@ -652,7 +656,7 @@ void hci_cmd_sync_clear(struct hci_dev *hdev)
 	mutex_unlock(&hdev->cmd_sync_work_lock);
 }
 
-void __hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
+void hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
 {
 	bt_dev_dbg(hdev, "err 0x%2.2x", err);
 
@@ -660,26 +664,31 @@ void __hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
 		hdev->req_result = err;
 		hdev->req_status = HCI_REQ_CANCELED;
 
-		cancel_delayed_work_sync(&hdev->cmd_timer);
-		cancel_delayed_work_sync(&hdev->ncmd_timer);
-		atomic_set(&hdev->cmd_cnt, 1);
-
-		wake_up_interruptible(&hdev->req_wait_q);
+		queue_work(hdev->workqueue, &hdev->cmd_sync_cancel_work);
 	}
 }
+EXPORT_SYMBOL(hci_cmd_sync_cancel);
 
-void hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
+/* Cancel ongoing command request synchronously:
+ *
+ * - Set result and mark status to HCI_REQ_CANCELED
+ * - Wakeup command sync thread
+ */
+void hci_cmd_sync_cancel_sync(struct hci_dev *hdev, int err)
 {
 	bt_dev_dbg(hdev, "err 0x%2.2x", err);
 
 	if (hdev->req_status == HCI_REQ_PEND) {
-		hdev->req_result = err;
+		/* req_result is __u32 so error must be positive to be properly
+		 * propagated.
+		 */
+		hdev->req_result = err < 0 ? -err : err;
 		hdev->req_status = HCI_REQ_CANCELED;
 
-		queue_work(hdev->workqueue, &hdev->cmd_sync_cancel_work);
+		wake_up_interruptible(&hdev->req_wait_q);
 	}
 }
-EXPORT_SYMBOL(hci_cmd_sync_cancel);
+EXPORT_SYMBOL(hci_cmd_sync_cancel_sync);
 
 /* Submit HCI command to be run in as cmd_sync_work:
  *
@@ -4902,6 +4911,11 @@ int hci_dev_open_sync(struct hci_dev *hdev)
 			hdev->sent_cmd = NULL;
 		}
 
+		if (hdev->req_skb) {
+			kfree_skb(hdev->req_skb);
+			hdev->req_skb = NULL;
+		}
+
 		clear_bit(HCI_RUNNING, &hdev->flags);
 		hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
 
@@ -5063,6 +5077,12 @@ int hci_dev_close_sync(struct hci_dev *hdev)
 		hdev->sent_cmd = NULL;
 	}
 
+	/* Drop last request */
+	if (hdev->req_skb) {
+		kfree_skb(hdev->req_skb);
+		hdev->req_skb = NULL;
+	}
+
 	clear_bit(HCI_RUNNING, &hdev->flags);
 	hci_sock_dev_event(hdev, HCI_DEV_CLOSE);