[PATCH v2 2/3] drm/amdgpu: fix the eviction fence dereference

[Prike Liang]

The dma_resv_add_fence() already refers to the added fence.
So when attaching the evciton fence to the gem bo, it needn't
refer to it anymore.

Signed-off-by: Prike Liang <Prike.Liang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_eviction_fence.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_eviction_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_eviction_fence.c
index 6c9b2b43a929..7a5f02ef45a7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_eviction_fence.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_eviction_fence.c
@@ -189,7 +189,6 @@ void amdgpu_eviction_fence_destroy(struct amdgpu_eviction_fence_mgr *evf_mgr)
 int amdgpu_eviction_fence_attach(struct amdgpu_eviction_fence_mgr *evf_mgr,
 				 struct amdgpu_bo *bo)
 {
-	struct dma_fence *ef;
 	struct amdgpu_eviction_fence *ev_fence;
 	struct dma_resv *resv = bo->tbo.base.resv;
 	int ret;
@@ -205,10 +204,8 @@ int amdgpu_eviction_fence_attach(struct amdgpu_eviction_fence_mgr *evf_mgr,
 
 	spin_lock(&evf_mgr->ev_fence_lock);
 	ev_fence = evf_mgr->ev_fence;
-	if (ev_fence) {
-		ef = dma_fence_get(&ev_fence->base);
-		dma_resv_add_fence(resv, ef, DMA_RESV_USAGE_BOOKKEEP);
-	}
+	if (ev_fence)
+		dma_resv_add_fence(resv, &ev_fence->base, DMA_RESV_USAGE_BOOKKEEP);
 	spin_unlock(&evf_mgr->ev_fence_lock);
 
 	return 0;
-- 
2.34.1