drm/nouveau: hold mutex when calling nouveau_abi16_fini()

This was the only access to cli->abi16 without holding the mutex.

Signed-off-by: Kamil Dudka <kdudka@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 649024d4daf1..01c78a4a3efa 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -865,8 +865,10 @@ nouveau_drm_preclose(struct drm_device *dev, struct drm_file *fpriv)
 
         pm_runtime_get_sync(dev->dev);
 
+        mutex_lock(&cli->mutex);
         if (cli->abi16)
                 nouveau_abi16_fini(cli->abi16);
+        mutex_unlock(&cli->mutex);
 
         mutex_lock(&drm->client.mutex);
         list_del(&cli->head);