Commit bef1909e authored by Per Hurtig's avatar Per Hurtig Committed by David S. Miller

tcp: fixing TLP's FIN recovery

Fix to a problem observed when losing a FIN segment that does not
contain data.  In such situations, TLP is unable to recover from
*any* tail loss and instead adds at least PTO ms to the
retransmission process, i.e., RTO = RTO + PTO.
Signed-off-by: default avatarPer Hurtig <per.hurtig@kau.se>
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Acked-by: default avatarNandita Dukkipati <nanditad@google.com>
Acked-by: default avatarNeal Cardwell <ncardwell@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent fba0e1a3
...@@ -2131,8 +2131,6 @@ void tcp_send_loss_probe(struct sock *sk) ...@@ -2131,8 +2131,6 @@ void tcp_send_loss_probe(struct sock *sk)
if (WARN_ON(!skb || !tcp_skb_pcount(skb))) if (WARN_ON(!skb || !tcp_skb_pcount(skb)))
goto rearm_timer; goto rearm_timer;
/* Probe with zero data doesn't trigger fast recovery. */
if (skb->len > 0)
err = __tcp_retransmit_skb(sk, skb); err = __tcp_retransmit_skb(sk, skb);
/* Record snd_nxt for loss detection. */ /* Record snd_nxt for loss detection. */
......
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