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-rw-r--r--net/ipv4/tcp_highspeed.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/tcp_highspeed.c b/net/ipv4/tcp_highspeed.c
index b72fa55dfb8..ba7c63ca5bb 100644
--- a/net/ipv4/tcp_highspeed.c
+++ b/net/ipv4/tcp_highspeed.c
@@ -135,7 +135,8 @@ static void hstcp_cong_avoid(struct sock *sk, u32 adk, u32 rtt,
/* Do additive increase */
if (tp->snd_cwnd < tp->snd_cwnd_clamp) {
- tp->snd_cwnd_cnt += ca->ai;
+ /* cwnd = cwnd + a(w) / cwnd */
+ tp->snd_cwnd_cnt += ca->ai + 1;
if (tp->snd_cwnd_cnt >= tp->snd_cwnd) {
tp->snd_cwnd_cnt -= tp->snd_cwnd;
tp->snd_cwnd++;