Rafał Miłecki eea538204b kernel: fix refcnt leak in LED netdev trigger on interface rename ... 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>		2019-03-06 06:08:15 +01:00
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ledtrig-netdev.c	kernel: fix refcnt leak in LED netdev trigger on interface rename	2019-03-06 06:08:15 +01:00