Subject: [PATCH net-next] bonding: update port speed when getting bond speed

From: Hangbin Liu <[email-masked]>
Date: Mon, 21 Aug 2023 18:10:08 +0800

Andrew reported a bonding issue that if we put an active-back bond on top
of a 802.3ad bond interface. When the 802.3ad bond's speed/duplex changed
dynamically. The upper bonding interface's speed/duplex can't be changed at
the same time, which will show incorrect speed.

Fix it by updating the port speed when calling ethtool.

Reported-by: Andrew Schorr <[email-masked]>
Closes: https://lore.kernel.org/netdev/ZEt3hvyREPVdbesO@Laptop-X1/
Signed-off-by: Hangbin Liu <[email-masked]>
---
 drivers/net/bonding/bond_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 447b06ea4fc9..07c2e46d27a8 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -5706,6 +5706,7 @@ static int bond_ethtool_get_link_ksettings(struct net_device *bond_dev,
 	 */
 	bond_for_each_slave(bond, slave, iter) {
 		if (bond_slave_can_tx(slave)) {
+			bond_update_speed_duplex(slave);
 			if (slave->speed != SPEED_UNKNOWN) {
 				if (BOND_MODE(bond) == BOND_MODE_BROADCAST)
 					speed = bond_mode_bcast_speed(slave,
-- 
2.41.0