[PATCH] drm/ttm: fix shared slot reservation during BO creation

[Christian König]

Make sure we reserve at least one slot for pipelined BO moves
during BO creation.

Fixes: 5786b66c9e3b drm/ttm: drop the extra reservation for pipelined BO
moves

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/ttm/ttm_bo.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 7db66e4088e2..ffd68b039d23 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -1264,6 +1264,9 @@ int ttm_bo_init_reserved(struct ttm_bo_device *bdev,
 		WARN_ON(!locked);
 	}
 
+	if (likely(!ret))
+		ret = reservation_object_reserve_shared(bo->resv, 1);
+
 	if (likely(!ret))
 		ret = ttm_bo_validate(bo, placement, ctx);
 
-- 
2.14.1