[PATCH v3 1/2] drm/sched: Avoid job cleanup if sched thread is parked.

[Andrey Grodzovsky]

When the sched thread is parked we assume ring_mirror_list is
not accessed from here.

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky at amd.com>
Reviewed-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/scheduler/sched_main.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index d4cc728..6774955 100644
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -635,9 +635,13 @@ drm_sched_get_cleanup_job(struct drm_gpu_scheduler *sched)
 	struct drm_sched_job *job;
 	unsigned long flags;
 
-	/* Don't destroy jobs while the timeout worker is running */
-	if (sched->timeout != MAX_SCHEDULE_TIMEOUT &&
-	    !cancel_delayed_work(&sched->work_tdr))
+	/*
+	* Don't destroy jobs while the timeout worker is running  OR thread
+	* is being parked and hence assumed to not touch ring_mirror_list
+	*/
+	if ((sched->timeout != MAX_SCHEDULE_TIMEOUT &&
+	     !cancel_delayed_work(&sched->work_tdr)) ||
+	     __kthread_should_park(sched->thread))
 		return NULL;
 
 	spin_lock_irqsave(&sched->job_list_lock, flags);
-- 
2.7.4