diff options
| author | Martin Schiller <ms@dev.tdt.de> | 2019-10-25 09:01:42 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-17 20:35:54 +0100 |
| commit | f1fd9d0bfd925afb58c496bd7cb3b24545349ff1 (patch) | |
| tree | 8a43742bbd874377c8c470a8f51392a9875be98d | |
| parent | 935f39807a7e95678e5bda50757af326691a211c (diff) | |
| download | linux-stable-f1fd9d0bfd925afb58c496bd7cb3b24545349ff1.tar.gz linux-stable-f1fd9d0bfd925afb58c496bd7cb3b24545349ff1.tar.bz2 linux-stable-f1fd9d0bfd925afb58c496bd7cb3b24545349ff1.zip | |
leds: trigger: netdev: fix handling on interface rename
[ Upstream commit 5f820ed52371b4f5d8c43c93f03408d0dbc01e5b ]
The NETDEV_CHANGENAME code is not "unneeded" like it is stated in commit
4cb6560514fa ("leds: trigger: netdev: fix refcnt leak on interface
rename").
The event was accidentally misinterpreted equivalent to
NETDEV_UNREGISTER, but should be equivalent to NETDEV_REGISTER.
This was the case in the original code from the openwrt project.
Otherwise, you are unable to set netdev led triggers for (non-existent)
netdevices, which has to be renamed. This is the case, for example, for
ppp interfaces in openwrt.
Fixes: 06f502f57d0d ("leds: trigger: Introduce a NETDEV trigger")
Fixes: 4cb6560514fa ("leds: trigger: netdev: fix refcnt leak on interface rename")
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/leds/trigger/ledtrig-netdev.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c index 136f86a1627d..d5e774d83021 100644 --- a/drivers/leds/trigger/ledtrig-netdev.c +++ b/drivers/leds/trigger/ledtrig-netdev.c @@ -302,10 +302,12 @@ static int netdev_trig_notify(struct notifier_block *nb, container_of(nb, struct led_netdev_data, notifier); if (evt != NETDEV_UP && evt != NETDEV_DOWN && evt != NETDEV_CHANGE - && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER) + && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER + && evt != NETDEV_CHANGENAME) return NOTIFY_DONE; if (!(dev == trigger_data->net_dev || + (evt == NETDEV_CHANGENAME && !strcmp(dev->name, trigger_data->device_name)) || (evt == NETDEV_REGISTER && !strcmp(dev->name, trigger_data->device_name)))) return NOTIFY_DONE; @@ -315,6 +317,7 @@ static int netdev_trig_notify(struct notifier_block *nb, clear_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode); switch (evt) { + case NETDEV_CHANGENAME: case NETDEV_REGISTER: if (trigger_data->net_dev) dev_put(trigger_data->net_dev); |