This is a note to let you know that I've just added the patch titled
bonding: don't call update_speed_duplex() under spinlocks
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bonding-don-t-call-update_speed_duplex-under-spinlocks.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cada51dba45a8553f9eac3e3ee7b2b09e363835c Mon Sep 17 00:00:00 2001
From: Veaceslav Falico <vfalico@xxxxxxxxxx>
Date: Tue, 12 Mar 2013 06:31:32 +0000
Subject: bonding: don't call update_speed_duplex() under spinlocks
From: Veaceslav Falico <vfalico@xxxxxxxxxx>
[ Upstream commit 876254ae2758d50dcb08c7bd00caf6a806571178 ]
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@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/bonding/bond_main.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1737,6 +1737,8 @@ int bond_enslave(struct net_device *bond
bond_compute_features(bond);
+ bond_update_speed_duplex(new_slave);
+
read_lock(&bond->lock);
new_slave->last_arp_rx = jiffies;
@@ -1780,8 +1782,6 @@ int bond_enslave(struct net_device *bond
new_slave->link = BOND_LINK_DOWN;
}
- 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) {
@@ -2462,8 +2462,6 @@ static void bond_miimon_commit(struct bo
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");
Patches currently in stable-queue which might be from vfalico@xxxxxxxxxx are
queue-3.4/netconsole-don-t-call-__netpoll_cleanup-while-atomic.patch
queue-3.4/bonding-don-t-call-update_speed_duplex-under-spinlocks.patch
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