Bluetooth: cmtp: Fix session cleanup on failed conn add

Once the session thread is running, cleanup must be handled
by the session thread only.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

net/bluetooth/cmtp/core.c

@@ -382,16 +382,17 @@ int cmtp_add_connection(struct cmtp_connadd_req *req, struct socket *sock)
 
 	if (!(session->flags & (1 << CMTP_LOOPBACK))) {
 		err = cmtp_attach_device(session);
-		if (err < 0)
-			goto detach;
+		if (err < 0) {
+			atomic_inc(&session->terminate);
+			wake_up_process(session->task);
+			up_write(&cmtp_session_sem);
+			return err;
+		}
 	}
 
 	up_write(&cmtp_session_sem);
 	return 0;
 
-detach:
-	cmtp_detach_device(session);
-
 unlink:
 	__cmtp_unlink_session(session);