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(parent: f2eb253) | patch
drm/nouveau/tmr: handle races with hw when updating the next alarm time
authorBen Skeggs <bskeggs@redhat.com>
Thu, 11 May 2017 07:19:48 +0000 (17:19 +1000)
committerBen Skeggs <bskeggs@redhat.com>
Thu, 11 May 2017 22:32:57 +0000 (08:32 +1000)
commitf34bb7c7046c0c5818b5ae4c725990ec19d53154
tree0507437bc996484f39ef8290358ec60da67a49fdtree | snapshot
parentf2eb25317143f7126d783da01e007b0f2bca30a7commit | diff
drm/nouveau/tmr: handle races with hw when updating the next alarm time

If the time to the next alarm is short enough, we could race with HW and
end up with an ~4 second delay until it triggers.

Fix this by checking again after we update HW.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org
drivers/gpu/drm/nouveau/nvkm/subdev/timer/base.c diff | blob | history
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