From 6830c25b7d08fbbd922959425193791bc42079f2 Mon Sep 17 00:00:00 2001 From: Lennart Schulte Date: Wed, 17 Mar 2010 02:16:29 +0000 Subject: [PATCH] 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 Signed-off-by: Arnd Hannemann Signed-off-by: David S. Miller --- net/ipv4/tcp_input.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 788851ca8c5d..c096a4218b8f 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -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; -- 2.20.1