[Intel-gfx] [PATCH 2/3] drm/i915: fix for when semaphore updates fail

[Chris Wilson]

On Wed, 11 Apr 2012 11:18:20 -0700, Ben Widawsky <ben at bwidawsk.net> wrote:
> This fixes a long standing issue where emitting the semaphore updates
> may have failed, but we've already updated our internal data structure.
> 
> Reported-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> Signed-off-by: Ben Widawsky <benjamin.widawsky at intel.com>

I would have written it as ret == 0, but since I didn't write this,
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>

Fortunately the impact of the bug would have been render corruption and
not a GPU hang.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre