From: Rick Jones <rick.jones2@hp.com>
Date: Thu, 25 Sep 2014 17:55:28 +0000 (-0700)
Subject: arp: Do not perturb drop profiles with ignored ARP packets
X-Git-Tag: v3.18-rc1~115^2~124
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=825bae5d97d351ddf9720400df133fc4b1bc6a13;p=platform%2Fkernel%2Flinux-exynos.git

arp: Do not perturb drop profiles with ignored ARP packets

We do not wish to disturb dropwatch or perf drop profiles with an ARP
we will ignore.

Signed-off-by: Rick Jones <rick.jones2@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 1a9b99e..16acb59 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -953,10 +953,11 @@ static int arp_rcv(struct sk_buff *skb, struct net_device *dev,
 {
 	const struct arphdr *arp;
 
+	/* do not tweak dropwatch on an ARP we will ignore */
 	if (dev->flags & IFF_NOARP ||
 	    skb->pkt_type == PACKET_OTHERHOST ||
 	    skb->pkt_type == PACKET_LOOPBACK)
-		goto freeskb;
+		goto consumeskb;
 
 	skb = skb_share_check(skb, GFP_ATOMIC);
 	if (!skb)
@@ -974,6 +975,9 @@ static int arp_rcv(struct sk_buff *skb, struct net_device *dev,
 
 	return NF_HOOK(NFPROTO_ARP, NF_ARP_IN, skb, dev, NULL, arp_process);
 
+consumeskb:
+	consume_skb(skb);
+	return 0;
 freeskb:
 	kfree_skb(skb);
 out_of_mem: