[PATCH] drm/nouveau: fix bad ret code in nouveau_bo_move_prep

[Shuhao Fu <sfual@cse.ust.hk>]

In `nouveau_bo_move_prep`, if `nouveau_mem_map` fails, an error code
should be returned. Currently, it returns zero even if vmm addr is not
correctly mapped.

Signed-off-by: Shuhao Fu <sfual@cse.ust.hk>
Fixes: 9ce523cc3bf2 ("drm/nouveau: separate buffer object backing memory from nvkm structures")
---
 drivers/gpu/drm/nouveau/nouveau_bo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index b96f0555ca14..f26562eafffc 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -929,7 +929,7 @@ nouveau_bo_move_prep(struct nouveau_drm *drm, struct ttm_buffer_object *bo,
 		nvif_vmm_put(vmm, &old_mem->vma[1]);
 		nvif_vmm_put(vmm, &old_mem->vma[0]);
 	}
-	return 0;
+	return ret;
 }
 
 static int
-- 
2.39.5