[TCP]: Correct reordering detection change (no FRTO case)

The reordering detection must work also when FRTO has not been
used at all which was the original intention of mine, just the
expression of the idea was flawed.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index bb3f234668b3f9cce17c8e00ed5a45269e73b07c..f6ba07f0d81688ed81ed962bd1425f5548d962fe 100644 (file)
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1240,7 +1240,7 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
        tp->left_out = tp->sacked_out + tp->lost_out;
 
        if ((reord < tp->fackets_out) && icsk->icsk_ca_state != TCP_CA_Loss &&
-           (tp->frto_highmark && after(tp->snd_una, tp->frto_highmark)))
+           (!tp->frto_highmark || after(tp->snd_una, tp->frto_highmark)))
                tcp_update_reordering(sk, ((tp->fackets_out + 1) - reord), 0);
 
 #if FASTRETRANS_DEBUG > 0