Commit 6830c25b authored Mar 17, 2010 by Lennart Schulte Committed by David S. Miller Mar 19, 2010

tcp: Fix tcp_mark_head_lost() with packets == 0

A packet is marked as lost in case packets == 0, although nothing should be done.
This results in a too early retransmitted packet during recovery in some cases.
This small patch fixes this issue by returning immediately.

Signed-off-by: Lennart Schulte <lennart.schulte@nets.rwth-aachen.de>
Signed-off-by: Arnd Hannemann <hannemann@nets.rwth-aachen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent a50436f2

net/ipv4/tcp_input.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -2511,6 +2511,9 @@ static void tcp_mark_head_lost(struct sock *sk, int packets)
		int err;
		unsigned int mss;

		if (packets == 0)
		return;

		WARN_ON(packets > tp->packets_out);
		if (tp->lost_skb_hint) {
		skb = tp->lost_skb_hint;