tcp: fix >2 iw selection

[ Upstream commit 86bcebafc5e7f5163ccf828792fe694b112ed6fa ]

A long-standing feature in tcp_init_metrics() is such that
any of its goto reset prevents call to tcp_init_cwnd().

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 7abc6b8..4eca4d3 100644 (file)
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -931,6 +931,8 @@ static void tcp_init_metrics(struct sock *sk)
        tcp_bound_rto(sk);
        if (inet_csk(sk)->icsk_rto < TCP_TIMEOUT_INIT && !tp->rx_opt.saw_tstamp)
                goto reset;
+
+cwnd:
        tp->snd_cwnd = tcp_init_cwnd(tp, dst);
        tp->snd_cwnd_stamp = tcp_time_stamp;
        return;
@@ -945,6 +947,7 @@ reset:
                tp->mdev = tp->mdev_max = tp->rttvar = TCP_TIMEOUT_INIT;
                inet_csk(sk)->icsk_rto = TCP_TIMEOUT_INIT;
        }
+       goto cwnd;
 }
 
 static void tcp_update_reordering(struct sock *sk, const int metric,