Instead of moving this to the SYSTEM domain just drop the backing store
and let the resulting allocation be freed.

Signed-off-by: Christian König <christian.koe...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 44ae2c60c9d4..eebc9f77b611 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -203,6 +203,12 @@ static void amdgpu_evict_flags(struct ttm_buffer_object 
*bo,
                .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
        };
 
+       if (bo->type == ttm_bo_type_sg) {
+               placement->num_placement = 0;
+               placement->num_busy_placement = 0;
+               return;
+       }
+
        if (!amdgpu_ttm_bo_is_amdgpu_bo(bo)) {
                placement->placement = &placements;
                placement->busy_placement = &placements;
-- 
2.14.1

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