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bonding: Acquire correct locks in alb for promisc change 

Update ALB mode monitor to hold correct locks (RTNL and nothing
else) when calling dev_set_promiscuity.

Signed-off-by: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Jay Vosburgh 2007-10-17 17:37:51 -07:00 committed by Jeff Garzik
parent 6603a6f25e
commit d0e81b7e22
1 changed files with 10 additions and 9 deletions
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19
drivers/net/bonding/bond_alb.c
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@ -1455,16 +1455,16 @@ void bond_alb_monitor(struct work_struct *work)
/* handle rlb stuff */
if (bond_info->rlb_enabled) {
/* the following code changes the promiscuity of the
* the curr_active_slave. It needs to be locked with a
* write lock to protect from other code that also
* sets the promiscuity.
*/
write_lock_bh(&bond->curr_slave_lock);
if (bond_info->primary_is_promisc &&
(++bond_info->rlb_promisc_timeout_counter >= RLB_PROMISC_TIMEOUT)) {
/*
* dev_set_promiscuity requires rtnl and
* nothing else.
*/
read_unlock(&bond->lock);
rtnl_lock();
bond_info->rlb_promisc_timeout_counter = 0;
/* If the primary was set to promiscuous mode
@ -1473,9 +1473,10 @@ void bond_alb_monitor(struct work_struct *work)
*/
dev_set_promiscuity(bond->curr_active_slave->dev, -1);
bond_info->primary_is_promisc = 0;
}
write_unlock_bh(&bond->curr_slave_lock);
rtnl_unlock();
read_lock(&bond->lock);
}
if (bond_info->rlb_rebalance) {
bond_info->rlb_rebalance = 0;