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bonding: fix alb mode locking regression

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Fix locking issue in alb MAC address management; removed
incorrect locking and replaced with correct locking.  This bug was
introduced in commit 059fe7a578fba5bbb0fdc0365bfcf6218fa25eb0
("bonding: Convert locks to _bh, rework alb locking for new locking")

	Bug reported by Paul Smith <paul@mad-scientist.net>, who also
tested the fix.

Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jay Vosburgh 2009-05-04 09:03:37 +00:00 committed by David S. Miller
parent 9f722c0978
commit 815bcc2719
1 changed files with 3 additions and 9 deletions
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12
drivers/net/bonding/bond_alb.c
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@ -1706,10 +1706,8 @@ void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave
* Called with RTNL
*/
int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr)
__releases(&bond->curr_slave_lock)
__releases(&bond->lock)
__acquires(&bond->lock)
__acquires(&bond->curr_slave_lock)
__releases(&bond->lock)
{
struct bonding *bond = netdev_priv(bond_dev);
struct sockaddr *sa = addr;
@ -1745,9 +1743,6 @@ int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr)
}
}
write_unlock_bh(&bond->curr_slave_lock);
read_unlock(&bond->lock);
if (swap_slave) {
alb_swap_mac_addr(bond, swap_slave, bond->curr_active_slave);
alb_fasten_mac_swap(bond, swap_slave, bond->curr_active_slave);
@ -1755,16 +1750,15 @@ int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr)
alb_set_slave_mac_addr(bond->curr_active_slave, bond_dev->dev_addr,
bond->alb_info.rlb_enabled);
read_lock(&bond->lock);
alb_send_learning_packets(bond->curr_active_slave, bond_dev->dev_addr);
if (bond->alb_info.rlb_enabled) {
/* inform clients mac address has changed */
rlb_req_update_slave_clients(bond, bond->curr_active_slave);
}
read_unlock(&bond->lock);
}
read_lock(&bond->lock);
write_lock_bh(&bond->curr_slave_lock);
return 0;
}