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bonding: don't call slave_xxx_netpoll under spinlocks 

The slave_xxx_netpoll will call synchronize_rcu_bh(),
so the function may schedule and sleep, it should't be
called under spinlocks.

bond_netpoll_setup() and bond_netpoll_cleanup() are always
protected by rtnl lock, it is no need to take the read lock,
as the slave list couldn't be changed outside rtnl lock.

Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Cc: Jay Vosburgh <fubar@us.ibm.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
dingtianhong 2013-07-23 15:25:27 +08:00 committed by David S. Miller
parent f13bbc2f9a
commit c4cdef9b71
1 changed files with 3 additions and 12 deletions
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15
drivers/net/bonding/bond_main.c
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@ -1219,8 +1219,9 @@ static void bond_poll_controller(struct net_device *bond_dev)
{
}
static void __bond_netpoll_cleanup(struct bonding *bond)
static void bond_netpoll_cleanup(struct net_device *bond_dev)
{
struct bonding *bond = netdev_priv(bond_dev);
struct slave *slave;
int i;
@ -1228,14 +1229,6 @@ static void __bond_netpoll_cleanup(struct bonding *bond)
if (IS_UP(slave->dev))
slave_disable_netpoll(slave);
}
static void bond_netpoll_cleanup(struct net_device *bond_dev)
{
struct bonding *bond = netdev_priv(bond_dev);
read_lock(&bond->lock);
__bond_netpoll_cleanup(bond);
read_unlock(&bond->lock);
}
static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni, gfp_t gfp)
{
@ -1243,15 +1236,13 @@ static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni, g
struct slave *slave;
int i, err = 0;
read_lock(&bond->lock);
bond_for_each_slave(bond, slave, i) {
err = slave_enable_netpoll(slave);
if (err) {
__bond_netpoll_cleanup(bond);
bond_netpoll_cleanup(dev);
break;
}
}
read_unlock(&bond->lock);
return err;
}