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drm/i915: Only emit a flush if there is an outstanding gpu write 

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
hifive-unleashed-5.1
Chris Wilson 2010-12-06 14:36:02 +00:00
parent 6bda10d152
commit 0ac74c6b33
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/i915/i915_gem.c
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@ -2154,8 +2154,9 @@ static int i915_ring_idle(struct drm_device *dev,
if (list_empty(&ring->gpu_write_list) && list_empty(&ring->active_list))
return 0;
i915_gem_flush_ring(dev, ring,
I915_GEM_GPU_DOMAINS, I915_GEM_GPU_DOMAINS);
if (!list_empty(&ring->gpu_write_list))
i915_gem_flush_ring(dev, ring,
I915_GEM_GPU_DOMAINS, I915_GEM_GPU_DOMAINS);
return i915_wait_request(dev,
i915_gem_next_request_seqno(dev, ring),
ring);