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drm/scheduler: avoid infinite loop if entity's dependency is a scheduled error fence 

[Why]
drm_sched_entity_add_dependency_cb ignores the scheduled fence and return false.
If entity's dependency is a scheduler error fence and drm_sched_stop is called
due to TDR, drm_sched_entity_pop_job will wait for the dependency infinitely.

[How]
Do not wait or ignore the scheduled error fence, add drm_sched_entity_wakeup
callback for the dependency with scheduled error fence.

Signed-off-by: ZhenGuo Yin <zhenguo.yin@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
ZhenGuo Yin 2023-05-09 17:46:17 +08:00 committed by Alex Deucher
parent 71eaac368d
commit 4f9b94d848
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/scheduler/sched_entity.c
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@ -384,7 +384,7 @@ static bool drm_sched_entity_add_dependency_cb(struct drm_sched_entity *entity)
}
s_fence = to_drm_sched_fence(fence);
if (s_fence && s_fence->sched == sched &&
if (!fence->error && s_fence && s_fence->sched == sched &&
!test_bit(DRM_SCHED_FENCE_DONT_PIPELINE, &fence->flags)) {
/*