[PATCH] drm/sched: Avoid data corruptions

[Andrey Grodzovsky]

Wait for all dependencies of a job  to complete before
killing it to avoid data corruptions.

Signed-off-by: Andrey Grodzovsky <andrey.grodzov...@amd.com>
---
 drivers/gpu/drm/scheduler/sched_entity.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/scheduler/sched_entity.c 
b/drivers/gpu/drm/scheduler/sched_entity.c
index 2e93e881b65f..d5cf61972558 100644
--- a/drivers/gpu/drm/scheduler/sched_entity.c
+++ b/drivers/gpu/drm/scheduler/sched_entity.c
@@ -222,11 +222,16 @@ static void drm_sched_entity_kill_jobs_cb(struct 
dma_fence *f,
 static void drm_sched_entity_kill_jobs(struct drm_sched_entity *entity)
 {
        struct drm_sched_job *job;
+       struct dma_fence *f;
        int r;
 
        while ((job = to_drm_sched_job(spsc_queue_pop(&entity->job_queue)))) {
                struct drm_sched_fence *s_fence = job->s_fence;
 
+               /* Wait for all dependencies to avoid data corruptions */
+               while ((f = job->sched->ops->dependency(job, entity)))
+                       dma_fence_wait(f);
+
                drm_sched_fence_scheduled(s_fence);
                dma_fence_set_error(&s_fence->finished, -ESRCH);
 
-- 
2.25.1

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