Bluetooth: Remove sco_chan_get helper function

The sco_chan_get helper function is only used in two places and really
only protects conn->sk with a lock. So instead of hiding that fact,
just put the actual code in place where it is used.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

net/bluetooth/sco.c

@@ -127,15 +127,6 @@ static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
 	return conn;
 }
 
-static struct sock *sco_chan_get(struct sco_conn *conn)
-{
-	struct sock *sk = NULL;
-	sco_conn_lock(conn);
-	sk = conn->sk;
-	sco_conn_unlock(conn);
-	return sk;
-}
-
 /* Delete channel.
  * Must be called on the locked socket. */
 static void sco_chan_del(struct sock *sk, int err)
@@ -174,7 +165,10 @@ static int sco_conn_del(struct hci_conn *hcon, int err)
 	BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
 
 	/* Kill socket */
-	sk = sco_chan_get(conn);
+	sco_conn_lock(conn);
+	sk = conn->sk;
+	sco_conn_unlock(conn);
+
 	if (sk) {
 		bh_lock_sock(sk);
 		sco_sock_clear_timer(sk);
@@ -303,7 +297,11 @@ static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
 
 static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
 {
-	struct sock *sk = sco_chan_get(conn);
+	struct sock *sk;
+
+	sco_conn_lock(conn);
+	sk = conn->sk;
+	sco_conn_unlock(conn);
 
 	if (!sk)
 		goto drop;