NFSv4: Fix a potentially Oopsable condition in __nfs_idmap_unregister



Ensure that __nfs_idmap_unregister can be called twice without
consequences.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

parent 6b2fddd3

fs/nfs/idmap.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -404,8 +404,10 @@ static struct key_type key_type_id_resolver_legacy = {

		static void __nfs_idmap_unregister(struct rpc_pipe *pipe)
		{
		if (pipe->dentry)
		if (pipe->dentry) {
		rpc_unlink(pipe->dentry);
		pipe->dentry = NULL;
		}
		}

		static int __nfs_idmap_register(struct dentry *dir,