[AX25]: ax25_ds_idletimer_expiry() locking fix.

Fix deadlock identified by the Stanford locking checker.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@redhat.com>

net/ax25/ax25_ds_timer.c

@@ -180,7 +180,7 @@ void ax25_ds_idletimer_expiry(ax25_cb *ax25)
 			ax25->sk->sk_state_change(ax25->sk);
 			sock_set_flag(ax25->sk, SOCK_DEAD);
 		}
-		bh_lock_sock(ax25->sk);
+		bh_unlock_sock(ax25->sk);
 	}
 }