RDS: fix rds_tcp_init() error path

commit 3dad542 upstream.

If register_pernet_subsys() fails, we shouldn't try to call
unregister_pernet_subsys().

Fixes: 467fa15 ("RDS-TCP: Support multiple RDS-TCP listen endpoints, one per netns.")
Cc: Sowmini Varadhan <[email protected]>
Cc: David S. Miller <[email protected]>
Signed-off-by: Vegard Nossum <[email protected]>
Acked-by: Sowmini Varadhan <[email protected]>
Acked-by: Santosh Shilimkar <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: vegard

net/rds/tcp.c

@@ -544,7 +544,7 @@ static int rds_tcp_init(void)
 
 	ret = rds_tcp_recv_init();
 	if (ret)
-		goto out_slab;
+		goto out_pernet;
 
 	ret = rds_trans_register(&rds_tcp_transport);
 	if (ret)
@@ -556,8 +556,9 @@ static int rds_tcp_init(void)
 
 out_recv:
 	rds_tcp_recv_exit();
-out_slab:
+out_pernet:
 	unregister_pernet_subsys(&rds_tcp_net_ops);
+out_slab:
 	kmem_cache_destroy(rds_tcp_conn_slab);
 out:
 	return ret;