Renaming a netdev-trigger-tracked interface was resulting in an
unbalanced dev_hold().
Example:
> iw phy phy0 interface add foo type __ap
> echo netdev > trigger
> echo foo > device_name
> ip link set foo name bar
> iw dev bar del
[ 237.355366] unregister_netdevice: waiting for bar to become free. Usage count = 1
[ 247.435362] unregister_netdevice: waiting for bar to become free. Usage count = 1
[ 257.545366] unregister_netdevice: waiting for bar to become free. Usage count = 1
Above problem was caused by trigger checking a dev->name which obviously
changes after renaming an interface. It meant missing all further events
including the NETDEV_UNREGISTER which is required for calling dev_put().
This change fixes that by:
1) Comparing device struct *address* for notification-filtering purposes
2) Dropping unneeded NETDEV_CHANGENAME code (no behavior change)
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
This fixes logic bug(in function netdev_trig_notify) introduced in
0b2991a8ed commit.
Events triggered by different interfaces were stopping work queue so it
wasn't working for tx/rx mode.
Signed-off-by: Sergey Sergeev <adron@yapic.net>
This fixes hangs in igb that happen if the update call interrupts an
already existing dev_get_stats call. In that case the calling CPU
deadlocks because it's trying to acquire the same spinlock recursively.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This fixes regression introduced in my recent ledtrig-netdev commit.
Events triggered by different interfaces were stopping timer so it
wasn't working for tx/rx mode.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 48072
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
Previously switching to non-existing device (interface) could result in
leaving LED on.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 47990
We may just delete timer on every trigger update and then start it again
if needed. This will let us avoid both: races and locking in frequently
called timer callback.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 47987
Read/write lock was adding useless complexity, there wasn't any real
gain in case of this driver.
Also switch to _bh variants to avoid deadlocks.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 47986
All supported kernels require patching ledtrig-netdev in the same way,
so it's safe to just move these changes to the base version of this
driver. We needed these patches for some old kernels 2.6.36 and 3.11.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 47962
