[PATCH 3/6] drm/nouveau: audit bo->resource usage

[Christian König]

Make sure we can at least move and release BOs without backing store.

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/nouveau/nouveau_bo.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 92cd19021084..f83fb43b2e44 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -1006,7 +1006,8 @@ nouveau_bo_move(struct ttm_buffer_object *bo, bool evict,
 	}
 
 	/* Fake bo copy. */
-	if (old_reg->mem_type == TTM_PL_SYSTEM && !bo->ttm) {
+	if (!old_reg || (old_reg->mem_type == TTM_PL_SYSTEM &&
+			 !bo->ttm)) {
 		ttm_bo_move_null(bo, new_reg);
 		goto out;
 	}
-- 
2.25.1