tcp: don't clear retransmit_skb_hint when not necessary

[linux-2.6-omap-h63xx.git] / net / ipv4 / tcp_output.c

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index f900fae8b87e9512fee2a7f0c213f46283dc79f8..239cea7b6c0e85469f381a2be6bfa865a3cc03d1 100644 (file)
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -750,7 +750,7 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len,
 
        BUG_ON(len > skb->len);
 
-       tcp_clear_all_retrans_hints(tp);
+       tcp_clear_retrans_hints_partial(tp);
        nsize = skb_headlen(skb) - len;
        if (nsize < 0)
                nsize = 0;
@@ -1823,7 +1823,9 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *skb,
        tp->packets_out -= tcp_skb_pcount(next_skb);
 
        /* changed transmit queue under us so clear hints */
-       tcp_clear_all_retrans_hints(tp);
+       tcp_clear_retrans_hints_partial(tp);
+       if (next_skb == tp->retransmit_skb_hint)
+               tp->retransmit_skb_hint = skb;
 
        sk_wmem_free_skb(sk, next_skb);
 }
@@ -1853,7 +1855,7 @@ void tcp_simple_retransmit(struct sock *sk)
                }
        }
 
-       tcp_clear_all_retrans_hints(tp);
+       tcp_clear_retrans_hints_partial(tp);
 
        if (prior_lost == tp->lost_out)
                return;