[PATCH v3 4/6] drm/i915: Allow error capture of a pending request

[John.C.Harrison at Intel.com]

From: John Harrison <John.C.Harrison at Intel.com>

A hang situation has been observed where the only requests on the
context were either completed or not yet started according to the
breaadcrumbs. However, the register state claimed a batch was (maybe)
in progress. So, allow capture of the pending request on the grounds
that this might be better than nothing.

v2: Reword 'not started' warning message (Tvrtko)

Signed-off-by: John Harrison <John.C.Harrison at Intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
 drivers/gpu/drm/i915/i915_gpu_error.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 743614fff5472..0d1e68830b75e 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1624,12 +1624,9 @@ capture_engine(struct intel_engine_cs *engine,
 		return NULL;
 
 	intel_get_hung_entity(engine, &ce, &rq);
-	if (rq && !i915_request_started(rq)) {
-		drm_info(&engine->gt->i915->drm, "Got hung context on %s with no active request!\n",
-			 engine->name);
-		i915_request_put(rq);
-		rq = NULL;
-	}
+	if (rq && !i915_request_started(rq))
+		drm_info(&engine->gt->i915->drm, "Got hung context on %s with active request %lld:%lld [0x%04X] not yet started\n",
+			 engine->name, rq->fence.context, rq->fence.seqno, ce->guc_id.id);
 
 	if (rq) {
 		capture = intel_engine_coredump_add_request(ee, rq, ATOMIC_MAYFAIL);
-- 
2.39.0