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drm/i915: Don't skip request retirement if the active list is empty

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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>
This commit is contained in:
Ville Syrjälä 2015-05-28 18:32:36 +03:00 committed by Jani Nikula
parent e058c945e0
commit 0aedb16265
1 changed files with 0 additions and 3 deletions
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3
drivers/gpu/drm/i915/i915_gem.c
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@ -2656,9 +2656,6 @@ void i915_gem_reset(struct drm_device *dev)
void
i915_gem_retire_requests_ring(struct intel_engine_cs *ring)
{
if (list_empty(&ring->request_list))
return;
WARN_ON(i915_verify_lists(ring->dev));
/* Retire requests first as we use it above for the early return.