ledtrig-netdev: add support for renamed devices

The ppp0 interface is renamed after the connection is established. Due
to a missing NETDEV_REGISTER event, the ledtrig-netdev isn't aware of
the renamed interface and literally ignores the device
(no tx/rx indication, led isn't switched off with 'ifdown wan').

Signed-off-by: Mathias Kresin <openwrt@kresin.me>

SVN-Revision: 48048

target/linux/generic/files/drivers/leds/ledtrig-netdev.c

@@ -265,7 +265,7 @@ static int netdev_trig_notify(struct notifier_block *nb,
 	struct net_device *dev = netdev_notifier_info_to_dev((struct netdev_notifier_info *) dv);
 	struct led_netdev_data *trigger_data = container_of(nb, struct led_netdev_data, notifier);
 
-	if (evt != NETDEV_UP && evt != NETDEV_DOWN && evt != NETDEV_CHANGE && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER)
+	if (evt != NETDEV_UP && evt != NETDEV_DOWN && evt != NETDEV_CHANGE && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER && evt != NETDEV_CHANGENAME)
 		return NOTIFY_DONE;
 
 	spin_lock_bh(&trigger_data->lock);
@@ -274,9 +274,10 @@ static int netdev_trig_notify(struct notifier_block *nb,
 	if (strcmp(dev->name, trigger_data->device_name))
 		goto done;
 
-	if (evt == NETDEV_REGISTER) {
+	if (evt == NETDEV_REGISTER || evt == NETDEV_CHANGENAME) {
 		if (trigger_data->net_dev != NULL)
 			dev_put(trigger_data->net_dev);
+
 		dev_hold(dev);
 		trigger_data->net_dev = dev;
 		trigger_data->link_up = 0;