1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 133b4132983e..13fdcd10a605 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -276,6 +276,7 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
 
         INIT_LIST_HEAD(&priv->lhead);
         INIT_LIST_HEAD(&priv->fbs);
+        mutex_init(&priv->fbs_lock);
         INIT_LIST_HEAD(&priv->event_list);
         init_waitqueue_head(&priv->event_wait);
         priv->event_space = 4096; /* set aside 4k for event buffer */