[Intel-gfx] [PATCH v3] drm/i915: Fix forcewake active domain tracking

[Chris Wilson]

On Fri, Mar 10, 2017 at 09:32:49AM +0000, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> In commit 003342a50021 ("drm/i915: Keep track of active
> forcewake domains in a bitmask") I forgot to adjust the
> newly introduce fw_domains_active state across reset.
> 
> This caused the assert_forcewakes_inactive to trigger
> during suspend and resume if there were user held
> forcewakes.
> 
> v2: Bitmask checks are required since vfuncs are not
>     always present.
> 
> v3: Move bitmask tracking to get/put vfunc for simplicity.
>     (Chris Wilson)
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Fixes: 003342a50021 ("drm/i915: Keep track of active forcewake domains in a bitmask")
> Testcase: igt/drv_suspend/forcewake
> Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Cc: "Paneri, Praveen" <praveen.paneri at intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Daniel Vetter <daniel.vetter at intel.com>
> Cc: Jani Nikula <jani.nikula at linux.intel.com>
> Cc: intel-gfx at lists.freedesktop.org
> Cc: v4.10+ <stable at vger.kernel.org>

After being a chicken and waiting for CI,
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre