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bonding: don't call update_speed_duplex() under spinlocks 

bond_update_speed_duplex() might sleep while calling underlying slave's
routines. Move it out of atomic context in bond_enslave() and remove it
from bond_miimon_commit() - it was introduced by commit 546add79, however
when the slave interfaces go up/change state it's their responsibility to
fire NETDEV_UP/NETDEV_CHANGE events so that bonding can properly update
their speed.

I've tested it on all combinations of ifup/ifdown, autoneg/speed/duplex
changes, remote-controlled and local, on (not) MII-based cards. All changes
are visible.

Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Veaceslav Falico 2013-03-12 06:31:32 +00:00 committed by David S. Miller
parent d35162f89b
commit 876254ae27
1 changed files with 2 additions and 4 deletions
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6
drivers/net/bonding/bond_main.c
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@ -1746,6 +1746,8 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
bond_compute_features(bond);
bond_update_speed_duplex(new_slave);
read_lock(&bond->lock);
new_slave->last_arp_rx = jiffies -
@ -1798,8 +1800,6 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
new_slave->link == BOND_LINK_DOWN ? "DOWN" :
(new_slave->link == BOND_LINK_UP ? "UP" : "BACK"));
bond_update_speed_duplex(new_slave);
if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
/* if there is a primary slave, remember it */
if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
@ -2374,8 +2374,6 @@ static void bond_miimon_commit(struct bonding *bond)
bond_set_backup_slave(slave);
}
bond_update_speed_duplex(slave);
pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n",
bond->dev->name, slave->dev->name,
slave->speed, slave->duplex ? "full" : "half");