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-rw-r--r--net/ipv4/tcp_input.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 8116d06e042c..53c8ce4046b2 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1403,6 +1403,10 @@ static int tcp_shifted_skb(struct sock *sk, struct sk_buff *skb,
BUG_ON(!pcount);
+ /* Adjust hint for FACK. Non-FACK is handled in tcp_sacktag_one(). */
+ if (tcp_is_fack(tp) && (skb == tp->lost_skb_hint))
+ tp->lost_cnt_hint += pcount;
+
TCP_SKB_CB(prev)->end_seq += shifted;
TCP_SKB_CB(skb)->seq += shifted;