[PATCH] drm/amdgpu: fix double reference dropping

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After dropping the reference of object fence in the loop, it should be
set to NULL to protecting dropping its reference again outside the loop.

Signed-off-by: Pan Bian <bianpan2016@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c
index 649e68c4479b..3174093f35f3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c
@@ -47,6 +47,7 @@ static int amdgpu_benchmark_do_move(struct amdgpu_device *adev, unsigned size,
 		if (r)
 			goto exit_do_move;
 		dma_fence_put(fence);
+		fence = NULL;
 	}
 	end_jiffies = jiffies;
 	r = jiffies_to_msecs(end_jiffies - start_jiffies);
-- 
2.7.4

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