[PATCH 02/12] drm/amd: add parent for sched fence

[Chunming Zhou]

Parent of sched fence is hw fence which is to signal sched fence.

Change-Id: I9441545175a35875779d050038d0d099995503b8
Signed-off-by: Chunming Zhou <David1.Zhou at amd.com>
Reviewed-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/amd/scheduler/gpu_scheduler.c | 1 +
 drivers/gpu/drm/amd/scheduler/gpu_scheduler.h | 1 +
 drivers/gpu/drm/amd/scheduler/sched_fence.c   | 1 +
 3 files changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
index 3405372..717655d 100644
--- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
+++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
@@ -516,6 +516,7 @@ static int amd_sched_main(void *param)
 		fence = sched->ops->run_job(sched_job);
 		amd_sched_fence_scheduled(s_fence);
 		if (fence) {
+			s_fence->parent = fence_get(fence);
 			r = fence_add_callback(fence, &s_fence->cb,
 					       amd_sched_process_job);
 			if (r == -ENOENT)
diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
index f259be7..b027603 100644
--- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
+++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
@@ -73,6 +73,7 @@ struct amd_sched_fence {
 	struct fence                    scheduled;
 	struct fence                    finished;
 	struct fence_cb                 cb;
+	struct fence                    *parent;
 	struct amd_gpu_scheduler	*sched;
 	spinlock_t			lock;
 	void                            *owner;
diff --git a/drivers/gpu/drm/amd/scheduler/sched_fence.c b/drivers/gpu/drm/amd/scheduler/sched_fence.c
index a5e3fef..6b63bea 100644
--- a/drivers/gpu/drm/amd/scheduler/sched_fence.c
+++ b/drivers/gpu/drm/amd/scheduler/sched_fence.c
@@ -98,6 +98,7 @@ static void amd_sched_fence_free(struct rcu_head *rcu)
 	struct fence *f = container_of(rcu, struct fence, rcu);
 	struct amd_sched_fence *fence = to_amd_sched_fence(f);
 
+	fence_put(fence->parent);
 	kmem_cache_free(sched_fence_slab, fence);
 }
 
-- 
1.9.1