diff --git a/src/linux/net/newip/tcp_nip_input.c b/src/linux/net/newip/tcp_nip_input.c
index 7b2a3c893245d33552763c9818c42838632ec6a1..7f6333f21e4a1092da9e5d19918211df08adbd7c 100644
--- a/src/linux/net/newip/tcp_nip_input.c
+++ b/src/linux/net/newip/tcp_nip_input.c
@@ -1152,7 +1152,7 @@ static int tcp_nip_ack(struct sock *sk, const struct sk_buff *skb, int flag)
 	if (after(ack, tp->snd_nxt))
 		return -1;
 
-	flag |= tcp_nip_ack_update_window(sk, skb, ack, ack_seq);
+	(void)tcp_nip_ack_update_window(sk, skb, ack, ack_seq);
 	icsk->icsk_probes_out = 0; // probe0 cnt
 	ntp->nip_keepalive_out = 0; // keepalive cnt
 	tp->rcv_tstamp = tcp_jiffies32;
diff --git a/src/linux/net/newip/tcp_nip_output.c b/src/linux/net/newip/tcp_nip_output.c
index 7ef8b7bd986f87908223c73a4ce6fb9867da7a57..5b34d6bd2e14bcde56bc22e71add1ed3b0a14d3d 100644
--- a/src/linux/net/newip/tcp_nip_output.c
+++ b/src/linux/net/newip/tcp_nip_output.c
@@ -47,11 +47,6 @@ struct tcp_nip_out_options {
 static bool tcp_nip_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle,
 			       int push_one, gfp_t gfp);
 
-static void tcp_nip_event_data_sent(struct tcp_sock *tp,
-				    struct sock *sk)
-{
-}
-
 /* Calculate MSS not accounting any TCP options.  */
 static inline int __tcp_nip_mtu_to_mss(struct sock *sk, int pmtu)
 {
@@ -548,7 +543,6 @@ static int __tcp_nip_transmit_skb(struct sock *sk, struct sk_buff *skb,
 
 	 /* There's data to send */
 	if (skb->len != tcp_header_size) {
-		tcp_nip_event_data_sent(tp, sk);
 		tp->data_segs_out += tcp_skb_pcount(skb);
 	}