[Intel-gfx] [CI] drm/i915/gt: Tidy up checking active timelines during retirement

[Chris Wilson]

Use the status of the timeline request list as we retire it to determine
if the timeline is still active.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Andi Shyti <andi.shyti at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gt_requests.c | 26 ++++++++++-----------
 1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gt_requests.c b/drivers/gpu/drm/i915/gt/intel_gt_requests.c
index b4f04614230e..b57c144621e9 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_requests.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_requests.c
@@ -14,27 +14,29 @@
 #include "intel_gt_requests.h"
 #include "intel_timeline.h"
 
-static void retire_requests(struct intel_timeline *tl)
+static bool retire_requests(struct intel_timeline *tl)
 {
 	struct i915_request *rq, *rn;
 
 	list_for_each_entry_safe(rq, rn, &tl->requests, link)
 		if (!i915_request_retire(rq))
-			break;
+			return false;
+
+	return true;
 }
 
-static bool flush_submission(struct intel_gt *gt)
+static void flush_submission(struct intel_gt *gt)
 {
 	struct intel_engine_cs *engine;
 	enum intel_engine_id id;
-	bool active = false;
+
+	if (!intel_gt_pm_is_awake(gt))
+		return;
 
 	for_each_engine(engine, gt, id) {
-		active |= intel_engine_flush_submission(engine);
-		active |= flush_work(&engine->retire_work);
+		intel_engine_flush_submission(engine);
+		flush_work(&engine->retire_work);
 	}
-
-	return active;
 }
 
 static void engine_retire(struct work_struct *work)
@@ -145,16 +147,15 @@ long intel_gt_retire_requests_timeout(struct intel_gt *gt, long timeout)
 			}
 		}
 
-		retire_requests(tl);
+		active_count += !retire_requests(tl);
 
+		flush_submission(gt);
 		spin_lock(&timelines->lock);
 
 		/* Resume iteration after dropping lock */
 		list_safe_reset_next(tl, tn, link);
 		if (atomic_dec_and_test(&tl->active_count))
 			list_del(&tl->link);
-		else
-			active_count += i915_active_fence_isset(&tl->last_request);
 
 		mutex_unlock(&tl->mutex);
 
@@ -169,9 +170,6 @@ long intel_gt_retire_requests_timeout(struct intel_gt *gt, long timeout)
 	list_for_each_entry_safe(tl, tn, &free, link)
 		__intel_timeline_free(&tl->kref);
 
-	if (flush_submission(gt))
-		active_count++;
-
 	return active_count ? timeout : 0;
 }
 
-- 
2.24.1