From e0809dbc47dea83eba7a9abb70e87470904d4372 Mon Sep 17 00:00:00 2001 From: "nikolay@redhat.com" Date: Mon, 18 Feb 2013 07:59:03 +0000 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- drivers/net/bonding/bond_3ad.c | 9 ++++----- 1 file 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); -- 2.20.1