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authornikolay@redhat.com <nikolay@redhat.com>2013-02-18 07:59:03 +0000
committerDavid S. Miller <davem@davemloft.net>2013-02-19 00:51:08 -0500
commite0809dbc47dea83eba7a9abb70e87470904d4372 (patch)
tree210276bba9031e3df771084b87aacf5bfe4e0462 /drivers/net/bonding/bond_3ad.c
parentb59340c2c0508d280f10658ad662fa56a39c74c2 (diff)
downloadlinux-linaro-stable-e0809dbc47dea83eba7a9abb70e87470904d4372.tar.gz
bonding: Fix initialize after use for 3ad machine state spinlock
The 3ad machine state spinlock can be used before it is inititialized while doing bond_enslave() (and the port is being initialized) since port->slave is set before the lock is prepared, thus causing soft lock-ups and a multitude of other nasty bugs. [ Rename __initialize_port_locks() variable name to 'slave' -DaveM ] Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/bonding/bond_3ad.c')
-rw-r--r--drivers/net/bonding/bond_3ad.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 0e45b400b6fc..fc58d118d844 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -389,13 +389,13 @@ static u8 __get_duplex(struct port *port)
/**
* __initialize_port_locks - initialize a port's STATE machine spinlock
- * @port: the port we're looking at
+ * @port: the slave of the port we're looking at
*
*/
-static inline void __initialize_port_locks(struct port *port)
+static inline void __initialize_port_locks(struct slave *slave)
{
// make sure it isn't called twice
- spin_lock_init(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
+ spin_lock_init(&(SLAVE_AD_INFO(slave).state_machine_lock));
}
//conversions
@@ -1910,6 +1910,7 @@ int bond_3ad_bind_slave(struct slave *slave)
ad_initialize_port(port, bond->params.lacp_fast);
+ __initialize_port_locks(slave);
port->slave = slave;
port->actor_port_number = SLAVE_AD_INFO(slave).id;
// key is determined according to the link speed, duplex and user key(which is yet not supported)
@@ -1932,8 +1933,6 @@ int bond_3ad_bind_slave(struct slave *slave)
port->next_port_in_aggregator = NULL;
__disable_port(port);
- __initialize_port_locks(port);
-
// aggregator initialization
aggregator = &(SLAVE_AD_INFO(slave).aggregator);