1 files changed, 2 insertions, 1 deletions

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 63da39372d40..d77c0d29e239 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -4957,7 +4957,8 @@ int tcp_rcv_established(struct sock *sk, struct sk_buff *skb,
                                         goto no_ack;
                         }
 
-                        __tcp_ack_snd_check(sk, 0);
+                        if (!copied_early || tp->rcv_nxt != tp->rcv_wup)
+                                __tcp_ack_snd_check(sk, 0);
 no_ack:
 #ifdef CONFIG_NET_DMA
                         if (copied_early)