[Intel-gfx] [PATCH 06/20] drm/i915: Check the execlist queue for pending requests before declaring idle

[Chris Wilson]

Including a check against the execlist queue before calling the engine
idle and passing hangcheck.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>
---
 drivers/gpu/drm/i915/intel_engine_cs.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index 24db316e0fd1..c6ebfe7fb4f1 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -1283,6 +1283,10 @@ bool intel_engine_is_idle(struct intel_engine_cs *engine)
 	if (port_request(&engine->execlist_port[0]))
 		return false;
 
+	/* ELSP is empty, but there are ready requests? */
+	if (READ_ONCE(engine->execlist_first))
+		return false;
+
 	/* Ring stopped? */
 	if (!ring_is_idle(engine))
 		return false;
-- 
2.13.3