drm/i915: Increase the amount of defense before computing vblank timestamps

Reported-by: Chris Clayton <chris2553@googlemail.com>
Tested-by: Chris Clayton <chris2553@googlemail.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2011-01-22 10:07:56 +00:00
commit 4041b85323