From: Jakub Kicinski <[email protected]>
Date: Wed, 29 Aug 2018 12:46:08 -0700
> To avoid leaking a running timer we need to wait for the
> posted reconfigs after netdev is unregistered. In common
> case the process of deinitializing the device will perform
> synchronous reconfigs which wait for posted requests, but
> especially with VXLAN ports being actively added and removed
> there can be a race condition leaving a timer running after
> adapter structure is freed leading to a crash.
>
> Add an explicit flush after deregistering and for a good
> measure a warning to check if timer is running just before
> structures are freed.
>
> Fixes: 3d780b926a12 ("nfp: add async reconfiguration mechanism")
> Signed-off-by: Jakub Kicinski <[email protected]>
> Reviewed-by: Dirk van der Merwe <[email protected]>
Applied and queued up for -stable.
