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Commit d02596e3 authored by Ilpo Järvinen's avatar Ilpo Järvinen Committed by David S. Miller
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[TCP]: Keep state in Disorder also if only lost_out > 0 



This happens rather infrequently and is only possible during
FRTO. We must not allow TCP to slip to Open state because
tcp_fastretrans_alert might then not be called on it's time
when FRTO has exited. This become a problem when left_out
got removed and was replaced by just sacked_out.

Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 86426c22

net/ipv4/tcp_input.c

+1 −1
Original line number Diff line number Diff line
@@ -2134,7 +2134,7 @@ static void tcp_try_to_open(struct sock *sk, int flag) 
	if (inet_csk(sk)->icsk_ca_state != TCP_CA_CWR) {

		int state = TCP_CA_Open;



		if (tp->sacked_out || tp->retrans_out || tp->undo_marker)

		if (tcp_left_out(tp) || tp->retrans_out || tp->undo_marker)

			state = TCP_CA_Disorder;



		if (inet_csk(sk)->icsk_ca_state != state) {