drm/amdgpu: remove entity reference from sched fence

Entity don't live as long as scheduler fences.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c
index 26b1793..b925253 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c
@@ -146,7 +146,7 @@
 
 	s_fence = to_amd_sched_fence(f);
 	if (s_fence)
-		return s_fence->entity->scheduler->ring_id;
+		return s_fence->scheduler->ring_id;
 	a_fence = to_amdgpu_fence(f);
 	if (a_fence)
 		return a_fence->ring->idx;
@@ -437,7 +437,7 @@
 			if (s_fence)
 				seq_printf(m, " protected by 0x%016x on ring %d",
 					   s_fence->base.seqno,
-					   s_fence->entity->scheduler->ring_id);
+					   s_fence->scheduler->ring_id);
 
 		}
 		seq_printf(m, "\n");