[ATM]: Handle register_netdevice_notifier() errors in mpc.c

Signed-off-by: walter harms <wharms@bfs.de>
Signed-off-by: Maximilian Attems <janitor@sternwelten.at>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/atm/mpc.c

@@ -755,13 +755,18 @@ int atm_mpoa_mpoad_attach (struct atm_vcc *vcc, int arg)
 {
 	struct mpoa_client *mpc;
 	struct lec_priv *priv;
+	int err;
 	
 	if (mpcs == NULL) {
 		init_timer(&mpc_timer);
 		mpc_timer_refresh();
 
 		/* This lets us now how our LECs are doing */
-		register_netdevice_notifier(&mpoa_notifier);
+		err = register_netdevice_notifier(&mpoa_notifier);
+		if (err < 0) {
+			del_timer(&mpc_timer);
+			return err;
+		}
 	}
 	
 	mpc = find_mpc_by_itfnum(arg);