Kernel bump from 4.1.3-rt to 4.1.7-rt.

[kvmfornfv.git] / kernel / drivers / xen / gntdev.c

diff --git a/kernel/drivers/xen/gntdev.c b/kernel/drivers/xen/gntdev.c
index 8927485..4bd23bb 100644 (file)
--- a/kernel/drivers/xen/gntdev.c
+++ b/kernel/drivers/xen/gntdev.c
@@ -568,12 +568,14 @@ static int gntdev_release(struct inode *inode, struct file *flip)
 
        pr_debug("priv %p\n", priv);
 
+       mutex_lock(&priv->lock);
        while (!list_empty(&priv->maps)) {
                map = list_entry(priv->maps.next, struct grant_map, next);
                list_del(&map->next);
                gntdev_put_map(NULL /* already removed */, map);
        }
        WARN_ON(!list_empty(&priv->freeable_maps));
+       mutex_unlock(&priv->lock);
 
        if (use_ptemod)
                mmu_notifier_unregister(&priv->mn, priv->mm);