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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>
This commit is contained in:
nikolay@redhat.com 2013-02-18 07:59:03 +00:00 committed by David S. Miller
parent b59340c2c0
commit e0809dbc47
1 changed files with 4 additions and 5 deletions
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9
drivers/net/bonding/bond_3ad.c
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@ -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);