>-----Original Message-----
>From: Intel-gfx <intel-gfx-boun...@lists.freedesktop.org> On Behalf Of
>Christian König
>Sent: Thursday, July 7, 2022 6:25 AM
>To: intel-...@lists.freedesktop.org; dri-devel@lists.freedesktop.org;
>nouv...@lists.freedesktop.org; amd-...@lists.freedesktop.org
>Cc: Christian König <christian.koe...@amd.com>
>Subject: [Intel-gfx] [PATCH 3/6] drm/nouveau: audit bo->resource usage
>
>Make sure we can at least move and release BOs without backing store.
>
>Signed-off-by: Christian König <christian.koe...@amd.com>
Reviewed-by: Michael J. Ruhl <michael.j.r...@intel.com>
M
>---
> 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
