[PATCH 4/6] drm/amdgpu: drop the backing store when DMA-buf imports are evicted

[Christian König]

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.koenig at 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