netdev - [PATCH 1/8 net-2.6.25] [ARP] Move inet_addr_type call after simple error checks in arp

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Date:	Mon, 14 Jan 2008 17:59:54 +0300
From:	"Denis V. Lunev" <den@...nvz.org>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, devel@...nvz.org,
	"Denis V. Lunev" <den@...nvz.org>
Subject: [PATCH 1/8 net-2.6.25] [ARP] Move inet_addr_type call after simple error checks in arp_contructor.

The neighbour entry will be destroyed in the case of error, so it is pointless
to perform constly routing table lookup in this case.

Signed-off-by: Denis V. Lunev <den@...nvz.org>
---
 net/ipv4/arp.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index b715ec0..49c24ff 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -235,8 +235,6 @@ static int arp_constructor(struct neighbour *neigh)
 	struct in_device *in_dev;
 	struct neigh_parms *parms;
 
-	neigh->type = inet_addr_type(&init_net, addr);
-
 	rcu_read_lock();
 	in_dev = __in_dev_get_rcu(dev);
 	if (in_dev == NULL) {
@@ -244,6 +242,8 @@ static int arp_constructor(struct neighbour *neigh)
 		return -EINVAL;
 	}
 
+	neigh->type = inet_addr_type(&init_net, addr);
+
 	parms = in_dev->arp_parms;
 	__neigh_parms_put(neigh->parms);
 	neigh->parms = neigh_parms_clone(parms);
-- 
1.5.3.rc5

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