netdev - [PATCH] net: dsa: Handle non-bridge master change

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Message-Id: <1427296117-1805-1-git-send-email-linux@roeck-us.net>
Date:	Wed, 25 Mar 2015 08:08:37 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	Florian Fainelli <f.fainelli@...il.com>,
	Andrew Lunn <andrew@...n.ch>,
	Scott Feldman <sfeldma@...il.com>, netdev@...r.kernel.org,
	Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH] net: dsa: Handle non-bridge master change

Master change notifications may occur other than when joining or
leaving a bridge, for example when being added to or removed from
a bond or Open vSwitch. In that case, do nothing instead of asking
the switch driver to remove a port from a bridge that it didn't join.

Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
Modeled after 'rocker: handle non-bridge master change',
after confirming that the condition is seen on dsa interfaces.

 net/dsa/slave.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index f0af7aa331c1..39555f3f263b 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -830,12 +830,13 @@ static bool dsa_slave_dev_check(struct net_device *dev)
 static int dsa_slave_master_changed(struct net_device *dev)
 {
 	struct net_device *master = netdev_master_upper_dev_get(dev);
+	struct dsa_slave_priv *p = netdev_priv(dev);
 	int err = 0;
 
 	if (master && master->rtnl_link_ops &&
 	    !strcmp(master->rtnl_link_ops->kind, "bridge"))
 		err = dsa_slave_bridge_port_join(dev, master);
-	else
+	else if (dsa_port_is_bridged(p))
 		err = dsa_slave_bridge_port_leave(dev);
 
 	return err;
-- 
2.1.0

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