X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fnetifd.git;a=blobdiff_plain;f=device.c;h=b6f4725e38e4e1f9dcd686b02b21877a9fc3053d;hp=47b5875c230446f74fc321d8b845a861d9dd2688;hb=b0b11b2295fbb8399949139d82156e123e005902;hpb=49bf4946296b22f7c26594ac310879d6059344d4

diff --git a/device.c b/device.c
index 47b5875..b6f4725 100644
--- a/device.c
+++ b/device.c
@@ -1,3 +1,16 @@
+/*
+ * netifd - network interface daemon
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -466,6 +479,9 @@ void device_add_user(struct device_user *dep, struct device *dev)
 	if (dep->dev)
 		device_remove_user(dep);
 
+	if (!dev)
+		return;
+
 	dep->dev = dev;
 	list_add_tail(&dep->list, &dev->users);
 	if (dep->cb && dev->present) {