[Intel-gfx] [PATCH] drm/i915/execlists: Add a couple more validity checks to assert_pending()

[Chris Wilson]

Check the pending request submission is valid: that it at least has a
reference for the submission and that the request is on the active list.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gt/intel_lrc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index fef4b7e823f5..90e2b4431549 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -1303,6 +1303,9 @@ assert_pending_valid(const struct intel_engine_execlists *execlists,
 		unsigned long flags;
 		bool ok = true;
 
+		GEM_BUG_ON(!kref_read(&rq->fence.ref));
+		GEM_BUG_ON(!i915_request_is_active(rq));
+
 		if (ce == rq->hw_context) {
 			GEM_TRACE_ERR("Dup context:%llx in pending[%zd]\n",
 				      ce->timeline->fence_context,
-- 
2.24.0