[3.16.y-ckt stable] Patch "snmp: Remove duplicate OUTMCAST stat increment" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    snmp: Remove duplicate OUTMCAST stat increment

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt22.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 427aad5236497cc354d2737b3b93929e397c93a7 Mon Sep 17 00:00:00 2001
From: Neil Horman <nhorman at tuxdriver.com>
Date: Mon, 16 Nov 2015 13:09:10 -0500
Subject: snmp: Remove duplicate OUTMCAST stat increment

commit 41033f029e393a64e81966cbe34d66c6cf8a2e7e upstream.

the OUTMCAST stat is double incremented, getting bumped once in the mcast code
itself, and again in the common ip output path.  Remove the mcast bump, as its
not needed

Validated by the reporter, with good results

Signed-off-by: Neil Horman <nhorman at tuxdriver.com>
Reported-by: Claus Jensen <claus.jensen at microsemi.com>
CC: Claus Jensen <claus.jensen at microsemi.com>
CC: David Miller <davem at davemloft.net>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 net/ipv6/mcast.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 2a6da3e5483f..e33349701050 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -1647,7 +1647,6 @@ out:
 	if (!err) {
 		ICMP6MSGOUT_INC_STATS(net, idev, ICMPV6_MLD2_REPORT);
 		ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
-		IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, payload_len);
 	} else {
 		IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
 	}
@@ -2010,7 +2009,6 @@ out:
 	if (!err) {
 		ICMP6MSGOUT_INC_STATS(net, idev, type);
 		ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
-		IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len);
 	} else
 		IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);