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Subject[PATCH 5.0 030/137] drm/ttm: fix dma_fence refcount imbalance on error path
Date
[ Upstream commit 543c364d8eeeb42c0edfaac9764f4e9f3d777ec1 ]

the ttm_bo_add_move_fence takes a reference to the struct dma_fence, but
failed to release it on the error path, leading to a memory leak.
add dma_fence_put before return when error occur.

Signed-off-by: Lin Yi <teroincn@163.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/ttm/ttm_bo.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 996cadd83f244..d8e1b3f129046 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -881,8 +881,10 @@ static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
reservation_object_add_shared_fence(bo->resv, fence);

ret = reservation_object_reserve_shared(bo->resv, 1);
- if (unlikely(ret))
+ if (unlikely(ret)) {
+ dma_fence_put(fence);
return ret;
+ }

dma_fence_put(bo->moving);
bo->moving = fence;
--
2.20.1


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