[Intel-gfx] [PATCH] drm/i915: Always call fence-lost prior to removing the fence

[Imre Deak]

On Tue, 2013-03-26 at 11:29 +0000, Chris Wilson wrote:
> There is a minute window for a race between put-fence removing the fence
> and for a new transaction by an external party on the GTT mmap. That is
> we must zap the mmap prior to removing the fence and not afterwards.
> 
> Fixes regression from
> commit 61050808bb019ebea966b7b5bfd357aaf219fb51
> Author: Chris Wilson <chris at chris-wilson.co.uk>
> Date:   Tue Apr 17 15:31:31 2012 +0100
> 
>     drm/i915: Refactor put_fence() to use the common fence writing routine
> 
> v2: Remember the fence to remove with a local variable (gcc)
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Cc: stable at vger.kernel.org # regression introduced in v3.5

Reviewed-by: Imre Deak <imre.deak at intel.com>