rds: tcp: remove redundant function rds_tcp_conn_paths_destroy()

A side-effect of Commit c14b036 ("rds: tcp: set linger to 1
when unloading a rds-tcp") is that we always send a RST on the tcp
connection for rds_conn_destroy(), so rds_tcp_conn_paths_destroy()
is not needed any more and is removed in this patch.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/rds/tcp.c

@@ -495,27 +495,6 @@ static struct pernet_operations rds_tcp_net_ops = {
 	.size = sizeof(struct rds_tcp_net),
 };
 
-/* explicitly send a RST on each socket, thereby releasing any socket refcnts
- * that may otherwise hold up netns deletion.
- */
-static void rds_tcp_conn_paths_destroy(struct rds_connection *conn)
-{
-	struct rds_conn_path *cp;
-	struct rds_tcp_connection *tc;
-	int i;
-	struct sock *sk;
-
-	for (i = 0; i < RDS_MPATH_WORKERS; i++) {
-		cp = &conn->c_path[i];
-		tc = cp->cp_transport_data;
-		if (!tc->t_sock)
-			continue;
-		sk = tc->t_sock->sk;
-		sk->sk_prot->disconnect(sk, 0);
-		tcp_done(sk);
-	}
-}
-
 static void rds_tcp_kill_sock(struct net *net)
 {
 	struct rds_tcp_connection *tc, *_tc;
@@ -535,10 +514,8 @@ static void rds_tcp_kill_sock(struct net *net)
 			list_move_tail(&tc->t_tcp_node, &tmp_list);
 	}
 	spin_unlock_irq(&rds_tcp_conn_lock);
-	list_for_each_entry_safe(tc, _tc, &tmp_list, t_tcp_node) {
-		rds_tcp_conn_paths_destroy(tc->t_cpath->cp_conn);
+	list_for_each_entry_safe(tc, _tc, &tmp_list, t_tcp_node)
 		rds_conn_destroy(tc->t_cpath->cp_conn);
-	}
 }
 
 void *rds_tcp_listen_sock_def_readable(struct net *net)