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 e41b3e5..50a40e4 100644 (file)
--- 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);