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>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 8b4e96e01d6c..6bbd90e1123c 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -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");