[Intel-gfx] [PATCH] drm/i915: don't set unpin_work if vblank_get fails

[Jesse Barnes]

On Mon, 22 Aug 2011 11:05:31 -0700
Jesse Barnes <jbarnes at virtuousgeek.org> wrote:

> This fixes a race where we may try to finish a page flip and decrement
> the refcount even if our vblank_get failed and we ended up with a
> spurious flip pending interrupt.
> 
> Fixes https://bugs.freedesktop.org/show_bug.cgi?id=34211.
> 
> Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>

Updated patch.  Though now I've lost track of the outstanding
issues...  IIRC we still have another race here, but it's unrelated to
the one in the bug report.

Jesse