nfsd: Unregister the cld notifier when laundry_wq create failed

If laundry_wq create failed, the cld notifier should be unregistered.

Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Author: z00467499

fs/nfsd/nfsctl.c

@@ -1543,12 +1543,14 @@ static int __init init_nfsd(void)
 		goto out_free_filesystem;
 	retval = register_cld_notifier();
 	if (retval)
-		goto out_free_all;
+		goto out_free_subsys;
 	retval = nfsd4_create_laundry_wq();
 	if (retval)
 		goto out_free_all;
 	return 0;
 out_free_all:
+	unregister_cld_notifier();
+out_free_subsys:
 	unregister_pernet_subsys(&nfsd_net_ops);
 out_free_filesystem:
 	unregister_filesystem(&nfsd_fs_type);