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(parent: 1ec3c71) | 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)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 25 May 2017 13:44:36 +0000 (15:44 +0200)
commitb77adf29b85687fd593d4dc294fb5cb946b3c0e2
treea1a8af816b67b34bf99ba79f9e747df131d1f258tree
parent1ec3c712e231468ac1b1024b9747882c444d4b19commit | diff
drm/nouveau/tmr: handle races with hw when updating the next alarm time

commit 1b0f84380b10ee97f7d2dd191294de9017e94d1d upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/gpu/drm/nouveau/nvkm/subdev/timer/base.c diff | blob | history