[PATCH] drm/amdgpu: fix fence handling in amdgpu_gem_object_close

[Pan, Xinhui]

Reviewed-by: xinhui pan <xinhui.pan at amd.com>

> 2020年3月31日 22:25，Christian König <ckoenig.leichtzumerken at gmail.com> 写道：
> 
> The exclusive fence is only optional.
> 
> Signed-off-by: Christian König <christian.koenig at amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> index a0be80513e96..77d988a0033f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> @@ -191,8 +191,10 @@ void amdgpu_gem_object_close(struct drm_gem_object *obj,
> 		goto out_unlock;
> 
> 	fence = dma_resv_get_excl(bo->tbo.base.resv);
> -	amdgpu_bo_fence(bo, fence, true);
> -	fence = NULL;
> +	if (fence) {
> +		amdgpu_bo_fence(bo, fence, true);
> +		fence = NULL;
> +	}
> 
> 	r = amdgpu_vm_clear_freed(adev, vm, &fence);
> 	if (r || !fence)
> -- 
> 2.17.1
> 
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