1 files changed, 28 insertions, 7 deletions

diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c
index b93464ac3517..0b4d0a8bd361 100644
--- a/net/bluetooth/af_bluetooth.c
+++ b/net/bluetooth/af_bluetooth.c
@@ -185,6 +185,28 @@ void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk)
 }
 EXPORT_SYMBOL(bt_sock_unlink);
 
+bool bt_sock_linked(struct bt_sock_list *l, struct sock *s)
+{
+	struct sock *sk;
+
+	if (!l || !s)
+		return false;
+
+	read_lock(&l->lock);
+
+	sk_for_each(sk, &l->head) {
+		if (s == sk) {
+			read_unlock(&l->lock);
+			return true;
+		}
+	}
+
+	read_unlock(&l->lock);
+
+	return false;
+}
+EXPORT_SYMBOL(bt_sock_linked);
+
 void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh)
 {
 	const struct cred *old_cred;
@@ -309,14 +331,11 @@ int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
 	if (flags & MSG_OOB)
 		return -EOPNOTSUPP;
 
-	lock_sock(sk);
-
 	skb = skb_recv_datagram(sk, flags, &err);
 	if (!skb) {
 		if (sk->sk_shutdown & RCV_SHUTDOWN)
 			err = 0;
 
-		release_sock(sk);
 		return err;
 	}
 
@@ -346,8 +365,6 @@ int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
 
 	skb_free_datagram(sk, skb);
 
-	release_sock(sk);
-
 	if (flags & MSG_TRUNC)
 		copied = skblen;
 
@@ -570,10 +587,11 @@ int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 		if (sk->sk_state == BT_LISTEN)
 			return -EINVAL;
 
-		lock_sock(sk);
+		spin_lock(&sk->sk_receive_queue.lock);
 		skb = skb_peek(&sk->sk_receive_queue);
 		amount = skb ? skb->len : 0;
-		release_sock(sk);
+		spin_unlock(&sk->sk_receive_queue.lock);
+
 		err = put_user(amount, (int __user *)arg);
 		break;
 
@@ -829,11 +847,14 @@ cleanup_sysfs:
 	bt_sysfs_cleanup();
 cleanup_led:
 	bt_leds_cleanup();
+	debugfs_remove_recursive(bt_debugfs);
 	return err;
 }
 
 static void __exit bt_exit(void)
 {
+	iso_exit();
+
 	mgmt_exit();
 
 	sco_exit();