netdev - [PATCH net-next 07/10] openvswitch: Don't insert empty OVS_VPORT_ATTR

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Date:	Tue, 16 Apr 2013 14:00:16 -0700
From:	Jesse Gross <jesse@...ira.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, dev@...nvswitch.org,
	Thomas Graf <tgraf@...g.ch>, Jesse Gross <jesse@...ira.com>
Subject: [PATCH net-next 07/10] openvswitch: Don't insert empty OVS_VPORT_ATTR_OPTIONS attribute

From: Thomas Graf <tgraf@...g.ch>

The port specific options are currently unused resulting in an
empty OVS_VPORT_ATTR_OPTIONS nested attribute being inserted
into every OVS_VPORT_CMD_GET message.

Don't insert OVS_VPORT_ATTR_OPTIONS if no options are present.

Signed-off-by: Thomas Graf <tgraf@...g.ch>
Signed-off-by: Jesse Gross <jesse@...ira.com>
---
 net/openvswitch/vport.c |   14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
index f6b8132..71a2de8 100644
--- a/net/openvswitch/vport.c
+++ b/net/openvswitch/vport.c
@@ -301,17 +301,19 @@ void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats)
 int ovs_vport_get_options(const struct vport *vport, struct sk_buff *skb)
 {
 	struct nlattr *nla;
+	int err;
+
+	if (!vport->ops->get_options)
+		return 0;
 
 	nla = nla_nest_start(skb, OVS_VPORT_ATTR_OPTIONS);
 	if (!nla)
 		return -EMSGSIZE;
 
-	if (vport->ops->get_options) {
-		int err = vport->ops->get_options(vport, skb);
-		if (err) {
-			nla_nest_cancel(skb, nla);
-			return err;
-		}
+	err = vport->ops->get_options(vport, skb);
+	if (err) {
+		nla_nest_cancel(skb, nla);
+		return err;
 	}
 
 	nla_nest_end(skb, nla);
-- 
1.7.10.4

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