linux-kernel - [PATCH 041/104] bonding: modify only neigh

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Message-Id: <1380535881-9239-42-git-send-email-luis.henriques@canonical.com>
Date:	Mon, 30 Sep 2013 11:10:18 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Veaceslav Falico <vfalico@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 041/104] bonding: modify only neigh_parms owned by us

3.5.7.22 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Veaceslav Falico <vfalico@...hat.com>

commit 9918d5bf329d0dc5bb2d9d293bcb772bdb626e65 upstream.

Otherwise, on neighbour creation, bond_neigh_init() will be called with a
foreign netdev.

Signed-off-by: Veaceslav Falico <vfalico@...hat.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/net/bonding/bond_main.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 1e1ae64..c7fd229c 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -3759,11 +3759,17 @@ static int bond_neigh_init(struct neighbour *n)
  * The bonding ndo_neigh_setup is called at init time beofre any
  * slave exists. So we must declare proxy setup function which will
  * be used at run time to resolve the actual slave neigh param setup.
+ *
+ * It's also called by master devices (such as vlans) to setup their
+ * underlying devices. In that case - do nothing, we're already set up from
+ * our init.
  */
 static int bond_neigh_setup(struct net_device *dev,
 			    struct neigh_parms *parms)
 {
-	parms->neigh_setup   = bond_neigh_init;
+	/* modify only our neigh_parms */
+	if (parms->dev == dev)
+		parms->neigh_setup = bond_neigh_init;
 
 	return 0;
 }
-- 
1.8.3.2

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