[PATCH 2/6] drm/ttm: remove the backing store if no placement is given

Christian König
2019-06-18T11:54:51Z

Pipeline removal of the BOs backing store when no placement is given
during validation.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
drivers/gpu/drm/ttm/ttm_bo.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index c7de667d482a..682a1a035b35 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -1240,6 +1240,18 @@ int ttm_bo_validate(struct ttm_buffer_object *bo,
uint32_t new_flags;

reservation_object_assert_held(bo->resv);
+
+ /*
+ * Remove the backing store if no placement is given.
+ */
+ if (!placement->num_placement && !placement->num_busy_placement) {
+ ret = ttm_bo_pipeline_gutting(bo);
+ if (ret)
+ return ret;
+
+ return ttm_tt_create(bo, false);
+ }
+
/*
* Check whether we need to move buffer.
*/
--
2.17.1