configfs: call drop_link() to cleanup after create_link() failure

When allow_link() succeeds but create_link() fails, the subsystem is not
informed of the failure.

This patch fixes this by calling drop_link() on create_link() failures.

Signed-off-by: Louis Rilling <Louis.Rilling@kerlabs.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/fs/configfs/symlink.c b/fs/configfs/symlink.c
index faeb4417a10d..0004d18c40ac 100644
--- a/fs/configfs/symlink.c
+++ b/fs/configfs/symlink.c
@@ -140,8 +140,12 @@ int configfs_symlink(struct inode *dir, struct dentry *dentry, const char *symna
                 goto out_put;
 
         ret = type->ct_item_ops->allow_link(parent_item, target_item);
-        if (!ret)
+        if (!ret) {
                 ret = create_link(parent_item, target_item, dentry);
+                if (ret && type->ct_item_ops->drop_link)
+                        type->ct_item_ops->drop_link(parent_item,
+                                                     target_item);
+        }
 
         config_item_put(target_item);
         path_put(&nd.path);