tcp: refactor tcp_retransmit_timer()

[tomoyo/tomoyo-test1.git] / net / ipv4 / tcp_timer.c

diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index dd5a631..1097b43 100644 (file)
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -434,6 +434,7 @@ void tcp_retransmit_timer(struct sock *sk)
        struct net *net = sock_net(sk);
        struct inet_connection_sock *icsk = inet_csk(sk);
        struct request_sock *req;
+       struct sk_buff *skb;
 
        req = rcu_dereference_protected(tp->fastopen_rsk,
                                        lockdep_sock_is_held(sk));
@@ -446,7 +447,12 @@ void tcp_retransmit_timer(struct sock *sk)
                 */
                return;
        }
-       if (!tp->packets_out || WARN_ON_ONCE(tcp_rtx_queue_empty(sk)))
+
+       if (!tp->packets_out)
+               return;
+
+       skb = tcp_rtx_queue_head(sk);
+       if (WARN_ON_ONCE(!skb))
                return;
 
        tp->tlp_high_seq = 0;
@@ -480,7 +486,7 @@ void tcp_retransmit_timer(struct sock *sk)
                        goto out;
                }
                tcp_enter_loss(sk);
-               tcp_retransmit_skb(sk, tcp_rtx_queue_head(sk), 1);
+               tcp_retransmit_skb(sk, skb, 1);
                __sk_dst_reset(sk);
                goto out_reset_timer;
        }