Deepak Nibade da8ff40e55 gpu: nvgpu: fix deadlock on timeout lock ...

In gk20a_channel_timeout_stop(), we take the channel's
timeout lock and then cancel the timeout worker thread

Timeout worker thread also tries to acquire same timeout
lock.

Hence, while cancelling the timeout in gk20a_channel_timeout_stop()
if the timeout_handler is already scheduled, we will have a deadlock

Fix this by moving cancel_delayed_work_sync() out of the locks

Bug 200133289
Bug 1695481

Change-Id: Iea78770180b483a63e5e176efba27831174e9dde
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/815922
Reviewed-by: Ishan Mittal <imittal@nvidia.com>
Tested-by: Ishan Mittal <imittal@nvidia.com>

2015-10-19 23:52:04 -07:00

..

nvgpu

gpu: nvgpu: fix deadlock on timeout lock

2015-10-19 23:52:04 -07:00