From: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Date: Sat, 6 Dec 2008 06:40:47 +0000 (-0800)
Subject: tcp: force mss equality with the next skb too.
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=f0bc52f38b09308fca85f3aa9300a341364fe9c6;p=openwrt%2Fstaging%2Fblogic.git

tcp: force mss equality with the next skb too.

Also make if-goto forest nicer looking.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index d67b6e9cc540..63c3ef6d4a1c 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1575,11 +1575,10 @@ static struct sk_buff *tcp_shift_skb_data(struct sock *sk, struct sk_buff *skb,
 		goto out;
 	skb = tcp_write_queue_next(sk, prev);
 
-	if (!skb_can_shift(skb))
-		goto out;
-	if (skb == tcp_send_head(sk))
-		goto out;
-	if ((TCP_SKB_CB(skb)->sacked & TCPCB_TAGBITS) != TCPCB_SACKED_ACKED)
+	if (!skb_can_shift(skb) ||
+	    (skb == tcp_send_head(sk)) ||
+	    ((TCP_SKB_CB(skb)->sacked & TCPCB_TAGBITS) != TCPCB_SACKED_ACKED) ||
+	    (mss != tcp_shift_mss(skb)))
 		goto out;
 
 	len = skb->len;