rds: Use atomic flag to track connections being destroyed

Replace c_destroy_in_prog by using a bit in cp_flags that
can set/tested atomically.

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>
diff --git a/net/rds/tcp_connect.c b/net/rds/tcp_connect.c
index 46f74da..534c67a 100644
--- a/net/rds/tcp_connect.c
+++ b/net/rds/tcp_connect.c
@@ -170,7 +170,7 @@ void rds_tcp_conn_path_shutdown(struct rds_conn_path *cp)
 		 cp->cp_conn, tc, sock);
 
 	if (sock) {
-		if (cp->cp_conn->c_destroy_in_prog)
+		if (test_bit(RDS_DESTROY_PENDING, &cp->cp_flags))
 			rds_tcp_set_linger(sock);
 		sock->ops->shutdown(sock, RCV_SHUTDOWN | SEND_SHUTDOWN);
 		lock_sock(sock->sk);