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bonding: fix enslavement error unwinds
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	As part of:

commit c2edacf
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>
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Jay Vosburgh authored and Jeff Garzik committed May 6, 2008
1 parent ae68c39 commit 569f0c4
Showing 1 changed file with 7 additions and 7 deletions.
14 changes: 7 additions & 7 deletions drivers/net/bonding/bond_main.c
Original file line number Diff line number Diff line change
Expand Up @@ -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;
Expand All @@ -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;
}
}

Expand Down Expand Up @@ -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",
Expand All @@ -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);
Expand Down

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