From: Jay Vosburgh <fubar@us.ibm.com>
Date: Sat, 3 May 2008 01:06:02 +0000 (-0700)
Subject: bonding: fix enslavement error unwinds
X-Git-Tag: v2.6.26-rc2~23^2~2^2~16
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=569f0c4d909c7f73de634abcdc36344cb72de36a;p=linux-2.6

bonding: fix enslavement error unwinds

	As part of:

commit c2edacf80e155ef54ae4774379d461b60896bc2e
Author: Jay Vosburgh <fubar@us.ibm.com>
Date:   Mon Jul 9 10:42:47 2007 -0700

    bonding / ipv6: no addrconf for slaves separately from master

two steps were rearranged in the enslavement process: netdev_set_master
is now before the call to dev_open to open the slave.

	This patch updates the error cases and unwind process at the
end of bond_enslave to match the new order.  Without this patch, it is
possible for the enslavement to fail, but leave the slave with IFF_SLAVE
set in its flags.

Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index e41b3e5726..50a40e4331 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1425,13 +1425,13 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
 	res = netdev_set_master(slave_dev, bond_dev);
 	if (res) {
 		dprintk("Error %d calling netdev_set_master\n", res);
-		goto err_close;
+		goto err_restore_mac;
 	}
 	/* open the slave since the application closed it */
 	res = dev_open(slave_dev);
 	if (res) {
 		dprintk("Openning slave %s failed\n", slave_dev->name);
-		goto err_restore_mac;
+		goto err_unset_master;
 	}
 
 	new_slave->dev = slave_dev;
@@ -1444,7 +1444,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
 		 */
 		res = bond_alb_init_slave(bond, new_slave);
 		if (res) {
-			goto err_unset_master;
+			goto err_close;
 		}
 	}
 
@@ -1619,7 +1619,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
 
 	res = bond_create_slave_symlinks(bond_dev, slave_dev);
 	if (res)
-		goto err_unset_master;
+		goto err_close;
 
 	printk(KERN_INFO DRV_NAME
 	       ": %s: enslaving %s as a%s interface with a%s link.\n",
@@ -1631,12 +1631,12 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
 	return 0;
 
 /* Undo stages on error */
-err_unset_master:
-	netdev_set_master(slave_dev, NULL);
-
 err_close:
 	dev_close(slave_dev);
 
+err_unset_master:
+	netdev_set_master(slave_dev, NULL);
+
 err_restore_mac:
 	if (!bond->params.fail_over_mac) {
 		memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);