Check that signaled bit on the request->fence before acquiring a
reference to the request for signaling later in the interrupt handler.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuopp...@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
---
drivers/gpu/drm/i915/i915_irq.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 31f0d7c8992f..e646c4eba65d 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1056,7 +1056,9 @@ static void notify_ring(struct intel_engine_cs *engine)
* and many waiters.
*/
if (i915_seqno_passed(intel_engine_get_seqno(engine),
- wait->seqno))
+ wait->seqno) &&
+ !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT,
+ &wait->request->fence.flags))
rq = i915_gem_request_get(wait->request);
wake_up_process(wait->tsk);
--
2.11.0
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