When Application A submits jobs (a1, a2, a3) and application B submits
job b1 with a dependency on a2's scheduler fence, killing application A
before run_job(a1) causes drm_sched_entity_kill_jobs_work() to force
signal all jobs sequentially. However, due to missing work_run_job or
work_free_job in entity_kill_job_work(), the scheduler enters sleep
state, causing application B hang.
Add drm_sched_wakeup() when entity_kill_job_work() to preventing
scheduler sleep and subsequent application hangs.
v2:
- Move drm_sched_wakeup() to after drm_sched_fence_scheduled()
Signed-off-by: Lin.Cao <linca...@amd.com>
---
drivers/gpu/drm/scheduler/sched_entity.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/scheduler/sched_entity.c
b/drivers/gpu/drm/scheduler/sched_entity.c
index e671aa241720..66f2a43c58fd 100644
--- a/drivers/gpu/drm/scheduler/sched_entity.c
+++ b/drivers/gpu/drm/scheduler/sched_entity.c
@@ -177,6 +177,7 @@ static void drm_sched_entity_kill_jobs_work(struct
work_struct *wrk)
struct drm_sched_job *job = container_of(wrk, typeof(*job), work);
drm_sched_fence_scheduled(job->s_fence, NULL);
+ drm_sched_wakeup(job->sched);
drm_sched_fence_finished(job->s_fence, -ESRCH);
WARN_ON(job->s_fence->parent);
job->sched->ops->free_job(job);
--
2.46.1
