4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mahesh Bandewar <maheshb@xxxxxxxxxx>
commit 3f3c278c94dd994fe0d9f21679ae19b9c0a55292 upstream.
Earlier patch c4adfc822bf5 ("bonding: make speed, duplex setting
consistent with link state") made an attempt to keep slave state
consistent with speed and duplex settings. Unfortunately link-state
transition is used to change the active link especially when used
in conjunction with mii-mon. The above mentioned patch broke that
logic. Also when speed and duplex settings for a link are updated
during a link-event, the link-status should not be changed to
invoke correct transition logic.
This patch fixes this issue by moving the link-state update outside
of the bond_update_speed_duplex() fn and to the places where this fn
is called and update link-state selectively.
Fixes: c4adfc822bf5 ("bonding: make speed, duplex setting consistent
with link state")
Signed-off-by: Mahesh Bandewar <maheshb@xxxxxxxxxx>
Reviewed-by: Andy Gospodarek <andy@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Nate Clark <nate@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/bonding/bond_main.c | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -384,20 +384,15 @@ static int bond_update_speed_duplex(stru
slave->duplex = DUPLEX_UNKNOWN;
res = __ethtool_get_link_ksettings(slave_dev, &ecmd);
- if (res < 0) {
- slave->link = BOND_LINK_DOWN;
+ if (res < 0)
return 1;
- }
- if (ecmd.base.speed == 0 || ecmd.base.speed == ((__u32)-1)) {
- slave->link = BOND_LINK_DOWN;
+ if (ecmd.base.speed == 0 || ecmd.base.speed == ((__u32)-1))
return 1;
- }
switch (ecmd.base.duplex) {
case DUPLEX_FULL:
case DUPLEX_HALF:
break;
default:
- slave->link = BOND_LINK_DOWN;
return 1;
}
@@ -1536,7 +1531,8 @@ int bond_enslave(struct net_device *bond
new_slave->delay = 0;
new_slave->link_failure_count = 0;
- bond_update_speed_duplex(new_slave);
+ if (bond_update_speed_duplex(new_slave))
+ new_slave->link = BOND_LINK_DOWN;
new_slave->last_rx = jiffies -
(msecs_to_jiffies(bond->params.arp_interval) + 1);
@@ -2141,6 +2137,7 @@ static void bond_miimon_commit(struct bo
case BOND_LINK_UP:
if (bond_update_speed_duplex(slave)) {
+ slave->link = BOND_LINK_DOWN;
netdev_warn(bond->dev,
"failed to get link speed/duplex for %s\n",
slave->dev->name);
