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drm/i915: Execute signal callbacks from no-op i915_request_wait 

If we enter i915_request_wait() with an already completed request, but
unsignaled dma-fence, signal the fence before returning. This allows us
to execute any of the signal callbacks at the earliest opportunity.

v2: Also signal after busyspin success

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190614111053.25615-2-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-06-14 12:10:53 +01:00
parent a09507682e
commit 6e4e970861
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/i915/i915_request.c
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@ -1437,7 +1437,7 @@ long i915_request_wait(struct i915_request *rq,
might_sleep();
GEM_BUG_ON(timeout < 0);
if (i915_request_completed(rq))
if (dma_fence_is_signaled(&rq->fence))
return timeout;
if (!timeout)
@ -1470,8 +1470,10 @@ long i915_request_wait(struct i915_request *rq,
* duration, which we currently lack.
*/
if (CONFIG_DRM_I915_SPIN_REQUEST &&
__i915_spin_request(rq, state, CONFIG_DRM_I915_SPIN_REQUEST))
__i915_spin_request(rq, state, CONFIG_DRM_I915_SPIN_REQUEST)) {
dma_fence_signal(&rq->fence);
goto out;
}
/*
* This client is about to stall waiting for the GPU. In many cases