drm/i915: Don't skip request retirement if the active list is empty
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Thu, 28 May 2015 15:32:36 +0000 (18:32 +0300)
committerJani Nikula <jani.nikula@intel.com>
Mon, 1 Jun 2015 07:55:51 +0000 (10:55 +0300)
commit0aedb1626566efd72b369c01992ee7413c82a0c5
tree59b8e06c99cf635fc8481a8587011e0116c73eb8
parente058c945e03a629c99606452a6931f632dd28903
drm/i915: Don't skip request retirement if the active list is empty

Apparently we can have requests even if though the active list is empty,
so do the request retirement regardless of whether there's anything
on the active list.

The way it happened here is that during suspend intel_ring_idle()
notices the olr hanging around and then proceeds to get rid of it by
adding a request. However since there was nothing on the active lists
i915_gem_retire_requests() didn't clean those up, and so the idle work
never runs, and we leave the GPU "busy" during suspend resulting in a
WARN later.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
drivers/gpu/drm/i915/i915_gem.c