drm/nouveau: when bailing out of a pushbuf ioctl, do not remove previous fence

Cc: stable@vger.kernel.org
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c
index c60f65a815d3..78a27f8ad7d9 100644
--- a/drivers/gpu/drm/nouveau/nouveau_gem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.c
@@ -308,7 +308,8 @@ validate_fini_list(struct list_head *list, struct nouveau_fence *fence,
         list_for_each_safe(entry, tmp, list) {
                 nvbo = list_entry(entry, struct nouveau_bo, entry);
 
-                nouveau_bo_fence(nvbo, fence);
+                if (likely(fence))
+                        nouveau_bo_fence(nvbo, fence);
 
                 if (unlikely(nvbo->validate_mapped)) {
                         ttm_bo_kunmap(&nvbo->kmap);