drm/nouveau/tmr: handle races with hw when updating the next alarm time

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commit 1b0f84380b 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>

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Ben Skeggs 2017-05-11 17:19:48 +10:00 • committed by Greg Kroah-Hartman

parent 1ec3c712e2

commit b77adf29b8

1 changed files with 16 additions and 10 deletions

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drivers/gpu/drm/nouveau/nvkm/subdev/timer/base.c

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