X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=net%2Fipv4%2Ftcp_input.c;h=12fda8f27b08bdf5c9f3bad422734f6b1965cef9;hb=662051215c758ae8545451628816204ed6cd372d;hp=83330a6cb24209cf6ac60d634245b7bc151ee6ac;hpb=c55572276834f8b17c859db7d20c224fe25b9eda;p=platform%2Fkernel%2Flinux-starfive.git

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 83330a6..12fda8f 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -4605,7 +4605,11 @@ static void tcp_data_queue_ofo(struct sock *sk, struct sk_buff *skb)
 	if (tcp_ooo_try_coalesce(sk, tp->ooo_last_skb,
 				 skb, &fragstolen)) {
 coalesce_done:
-		tcp_grow_window(sk, skb);
+		/* For non sack flows, do not grow window to force DUPACK
+		 * and trigger fast retransmit.
+		 */
+		if (tcp_is_sack(tp))
+			tcp_grow_window(sk, skb);
 		kfree_skb_partial(skb, fragstolen);
 		skb = NULL;
 		goto add_sack;
@@ -4689,7 +4693,11 @@ add_sack:
 		tcp_sack_new_ofo_skb(sk, seq, end_seq);
 end:
 	if (skb) {
-		tcp_grow_window(sk, skb);
+		/* For non sack flows, do not grow window to force DUPACK
+		 * and trigger fast retransmit.
+		 */
+		if (tcp_is_sack(tp))
+			tcp_grow_window(sk, skb);
 		skb_condense(skb);
 		skb_set_owner_r(skb, sk);
 	}