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drm/scheduler: fix a corner case in dependency optimization 

When checking for a dependency fence for belonging to the same entity
compare it with scheduled as well finished fence. Earlier we were only
comparing it with the scheduled fence.

Signed-off-by: Nayan Deshmukh <nayan26deshmukh@gmail.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nayan Deshmukh 2018-05-25 10:15:46 +05:30 committed by Alex Deucher
parent adea72c504
commit 6201e033d7
1 changed files with 7 additions and 2 deletions
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9
drivers/gpu/drm/scheduler/gpu_scheduler.c
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@ -349,8 +349,13 @@ static bool drm_sched_entity_add_dependency_cb(struct drm_sched_entity *entity)
struct dma_fence * fence = entity->dependency;
struct drm_sched_fence *s_fence;
if (fence->context == entity->fence_context) {
/* We can ignore fences from ourself */
if (fence->context == entity->fence_context ||
fence->context == entity->fence_context + 1) {
/*
* Fence is a scheduled/finished fence from a job
* which belongs to the same entity, we can ignore
* fences from ourself
*/
dma_fence_put(entity->dependency);
return false;
}