diff options
| author | Deepak Nibade <dnibade@nvidia.com> | 2014-07-03 08:29:39 -0400 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2015-03-18 15:10:24 -0400 |
| commit | 0b1f9e427205190dc5e651f78ff7f8be8641037e (patch) | |
| tree | 9d202f8c4a89fec720de139f28d41e58210dedef /drivers/gpu/nvgpu/gk20a/channel_sync_gk20a.c | |
| parent | d608aa53ee338922cbd47ec144cd6efb36fd0295 (diff) | |
gpu: nvgpu: fix race between do_idle() and unrailgate()
While we are executing do_idle() API, it is possible that
unrailgate() gets invoked in midst of idling the GPU and
this can result in failure of do_idle()
To prevent simultaneous execution of these methods,
add a mutex railgate_lock and acquire it during
do_idle() and unrailgate() APIs
Also, keep this lock held if do_idle() is successful.
In success, lock will be released in do_unidle(),
otherwise release this lock before returning
Note that this lock should not be held in railgate() API
since we do not want it to be blocked during do_idle()
bug 1529160
Change-Id: I87114b5367eaa217376455a2699c0d21c451c889
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/434190
(cherry picked from commit 561dc8e0933ff2d72573292968b893a52f5f783a)
Reviewed-on: http://git-master/r/435131
Reviewed-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
Diffstat (limited to 'drivers/gpu/nvgpu/gk20a/channel_sync_gk20a.c')
0 files changed, 0 insertions, 0 deletions