[PATCH] drm/amdgpu: fix a vm_flush fence leak

[zhoucm1]

On 2016年10月24日 02:31, Grazvydas Ignotas wrote:
> Looks like .last_flush reference is left at teardown.
> Leak reported by CONFIG_SLUB_DEBUG.
>
> Fixes: 41d9eb2c5a2a ("drm/amdgpu: add a fence after the VM flush")
> Signed-off-by: Grazvydas Ignotas <notasas at gmail.com>
Reviewed-by: Chunming Zhou <david1.zhou at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c 
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> index ded57dd..d6c2839 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> @@ -1774,5 +1774,6 @@ void amdgpu_vm_manager_fini(struct amdgpu_device *adev)
>               fence_put(adev->vm_manager.ids[i].first);
>               amdgpu_sync_free(&adev->vm_manager.ids[i].active);
>               fence_put(id->flushed_updates);
> +             fence_put(id->last_flush);
>       }
>   }