drm/scheduler: move last_sched fence updating prior to job popping (v2)
Make sure main thread won't update last_sched fence when entity is cleanup. Fix a racing issue which is caused by putting last_sched fence twice. Running vulkaninfo in tight loop can produce this issue as seeing wild fence pointer. v2: squash in build fix (Christian) Signed-off-by: Pixel Ding <Pixel.Ding@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Reviewed-by: Monk Liu <Monk.Liu@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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@ -402,6 +402,9 @@ drm_sched_entity_pop_job(struct drm_sched_entity *entity)
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if (entity->guilty && atomic_read(entity->guilty))
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dma_fence_set_error(&sched_job->s_fence->finished, -ECANCELED);
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dma_fence_put(entity->last_scheduled);
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entity->last_scheduled = dma_fence_get(&sched_job->s_fence->finished);
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spsc_queue_pop(&entity->job_queue);
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return sched_job;
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}
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@ -715,9 +718,6 @@ static int drm_sched_main(void *param)
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fence = sched->ops->run_job(sched_job);
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drm_sched_fence_scheduled(s_fence);
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dma_fence_put(entity->last_scheduled);
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entity->last_scheduled = dma_fence_get(&s_fence->finished);
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if (fence) {
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s_fence->parent = dma_fence_get(fence);
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r = dma_fence_add_callback(fence, &s_fence->cb,
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