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authorJay Vosburgh <fubar@us.ibm.com>2007-10-17 17:37:51 -0700
committerJeff Garzik <jeff@garzik.org>2007-10-23 20:32:01 -0400
commitd0e81b7e2246a41d068ecaf15aac9de570816d63 (patch)
tree27b1dac99c2ee47846bafab1a530cd6ffb2a0f03 /drivers/net/bonding
parent6603a6f25e4bca922a7dfbf0bf03072d98850176 (diff)
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>
Diffstat (limited to 'drivers/net/bonding')
-rw-r--r--drivers/net/bonding/bond_alb.c19
1 files changed, 10 insertions, 9 deletions
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index 6db5d763f6b..25b8dbf6cfd 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -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;