[VLAN]: Handler register_netdevice_notifier() errors.

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/8021q/vlan.c

@@ -96,13 +96,18 @@ static int __init vlan_proto_init(void)
 		printk(KERN_ERR 
 		       "%s %s: can't create entry in proc filesystem!\n",
 		       __FUNCTION__, VLAN_NAME);
-		return 1;
+		return err;
 	}
 
 	dev_add_pack(&vlan_packet_type);
 
 	/* Register us to receive netdevice events */
-	register_netdevice_notifier(&vlan_notifier_block);
+	err = register_netdevice_notifier(&vlan_notifier_block);
+	if (err < 0) {
+		dev_remove_pack(&vlan_packet_type);
+		vlan_proc_cleanup();
+		return err;
+	}
 
 	vlan_ioctl_set(vlan_ioctl_handler);