From: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Date: Thu, 17 Apr 2008 21:22:18 +0000 (-0700)
Subject: SCTP: Initialize partial_bytes_acked to 0, when all of the data is acked.
X-Git-Tag: firefly_0821_release~21615^2~7
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8b73a07c8ffaa70683022566080f4df3328ea18d;p=firefly-linux-kernel-4.4.55.git

SCTP: Initialize partial_bytes_acked to 0, when all of the data is acked.

According to RFC4960 7.2.2,
When all of the data transmitted by the sender has
been acknowledged by the recerver, partial_bytes_acked is initialized to 0.

This patch conforms to rfc requirement.
Without this fix, cwnd might be error incremented.

Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
index a7ba9e146dff..59edfd25a19c 100644
--- a/net/sctp/outqueue.c
+++ b/net/sctp/outqueue.c
@@ -1532,6 +1532,8 @@ static void sctp_check_transmitted(struct sctp_outq *q,
 						  bytes_acked);
 
 			transport->flight_size -= bytes_acked;
+			if (transport->flight_size == 0)
+				transport->partial_bytes_acked = 0;
 			q->outstanding_bytes -= bytes_acked;
 		} else {
 			/* RFC 2960 6.1, sctpimpguide-06 2.15.2