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drm/i915: Warn when execlists changes context without IRQs 

If an batch ends while the IRQs are not turned on the notification can
go missing and the GPU can hang. So generate a warning in this case.

Signed-off-by: Peter Antoine <peter.antoine@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
hifive-unleashed-5.1
Peter Antoine 2015-05-11 16:03:27 +01:00 committed by Daniel Vetter
parent 2614f17d2d
commit 779949f4b1
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/i915/intel_lrc.c
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@ -394,6 +394,12 @@ static void execlists_context_unqueue(struct intel_engine_cs *ring)
assert_spin_locked(&ring->execlist_lock);
/*
* If irqs are not active generate a warning as batches that finish
* without the irqs may get lost and a GPU Hang may occur.
*/
WARN_ON(!intel_irqs_enabled(ring->dev->dev_private));
if (list_empty(&ring->execlist_queue))
return;