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authorDavid S. Miller <davem@davemloft.net>2011-03-03 21:27:42 -0800
committerDavid S. Miller <davem@davemloft.net>2011-03-03 21:27:42 -0800
commit0a0e9ae1bd788bc19adc4d4ae08c98b233697402 (patch)
tree13825eeb5bbeae27d66e95f12168eff4b60701ab /net/ipv4/tcp_input.c
parent01a16b21d6adf992aa863186c3c4e561a57c1714 (diff)
parentb65a0e0c84cf489bfa00d6aa6c48abc5a237100f (diff)
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts: drivers/net/bnx2x/bnx2x.h
Diffstat (limited to 'net/ipv4/tcp_input.c')
-rw-r--r--net/ipv4/tcp_input.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 2f692cefd3b0..08ea735b9d72 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1222,7 +1222,7 @@ static int tcp_check_dsack(struct sock *sk, struct sk_buff *ack_skb,
}
/* D-SACK for already forgotten data... Do dumb counting. */
- if (dup_sack &&
+ if (dup_sack && tp->undo_marker && tp->undo_retrans &&
!after(end_seq_0, prior_snd_una) &&
after(end_seq_0, tp->undo_marker))
tp->undo_retrans--;
@@ -1299,7 +1299,8 @@ static u8 tcp_sacktag_one(struct sk_buff *skb, struct sock *sk,
/* Account D-SACK for retransmitted packet. */
if (dup_sack && (sacked & TCPCB_RETRANS)) {
- if (after(TCP_SKB_CB(skb)->end_seq, tp->undo_marker))
+ if (tp->undo_marker && tp->undo_retrans &&
+ after(TCP_SKB_CB(skb)->end_seq, tp->undo_marker))
tp->undo_retrans--;
if (sacked & TCPCB_SACKED_ACKED)
state->reord = min(fack_count, state->reord);