6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tejas Upadhyay <tejas.upadhyay@xxxxxxxxx>
[ Upstream commit 12c2f962fe71f390951d9242725bc7e608f55927 ]
The async call to __guc_exec_queue_fini_async frees the scheduler
while a submission may time out and restart. To prevent this race
condition, the pending job timer should be canceled before freeing
the scheduler.
V3(MattB):
- Adjust position of cancel pending job
- Remove gitlab issue# from commit message
V2(MattB):
- Cancel pending jobs before scheduler finish
Fixes: a20c75dba192 ("drm/xe: Call __guc_exec_queue_fini_async direct for KERNEL exec_queues")
Reviewed-by: Matthew Brost <matthew.brost@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20250225045754.600905-1-tejas.upadhyay@xxxxxxxxx
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@xxxxxxxxx>
(cherry picked from commit 18fbd567e75f9b97b699b2ab4f1fa76b7cf268f6)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/xe/xe_guc_submit.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/xe/xe_guc_submit.c b/drivers/gpu/drm/xe/xe_guc_submit.c
index fed23304e4da5..3fd2b28b91ab9 100644
--- a/drivers/gpu/drm/xe/xe_guc_submit.c
+++ b/drivers/gpu/drm/xe/xe_guc_submit.c
@@ -1215,6 +1215,8 @@ static void __guc_exec_queue_fini_async(struct work_struct *w)
if (xe_exec_queue_is_lr(q))
cancel_work_sync(&ge->lr_tdr);
+ /* Confirm no work left behind accessing device structures */
+ cancel_delayed_work_sync(&ge->sched.base.work_tdr);
release_guc_id(guc, q);
xe_sched_entity_fini(&ge->entity);
xe_sched_fini(&ge->sched);
--
2.39.5
