[PATCH 3/6] drm/amdgpu: overwrite signaled fence in amdgpu_sync

[Christian König]

This allows using amdgpu_sync even without peeking into the fences for a
long time.

Signed-off-by: Christian König <christian.koe...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
index 86c17a8946f5..bfe12164d27d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
@@ -135,11 +135,16 @@ static bool amdgpu_sync_add_later(struct amdgpu_sync 
*sync, struct dma_fence *f)
        struct amdgpu_sync_entry *e;
 
        hash_for_each_possible(sync->fences, e, node, f->context) {
-               if (unlikely(e->fence->context != f->context))
-                       continue;
+               if (dma_fence_is_signaled(e->fence)) {
+                       dma_fence_put(e->fence);
+                       e->fence = dma_fence_get(f);
+                       return true;
+               }
 
-               amdgpu_sync_keep_later(&e->fence, f);
-               return true;
+               if (likely(e->fence->context == f->context)) {
+                       amdgpu_sync_keep_later(&e->fence, f);
+                       return true;
+               }
        }
        return false;
 }
-- 
2.34.1