From: Vladimir Oltean vladimir.oltean@nxp.com
commit 79267ae22615496655feee2db0848f6786bcf67a upstream.
The blamed commit was too aggressive, and it made ocelot_netdevice_event react only to network interface events emitted for the ocelot switch ports.
In fact, only the PRECHANGEUPPER should have had that check.
When we ignore all events that are not for us, we miss the fact that the upper of the LAG changes, and the bonding interface gets enslaved to a bridge. This is an operation we could offload under certain conditions.
Fixes: 7afb3e575e5a ("net: mscc: ocelot: don't handle netdev events for other netdevs") Signed-off-by: Vladimir Oltean vladimir.oltean@nxp.com Reviewed-by: Alexandre Belloni alexandre.belloni@bootlin.com Link: https://lore.kernel.org/r/20210118135210.2666246-1-olteanv@gmail.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/net/ethernet/mscc/ocelot.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
--- a/drivers/net/ethernet/mscc/ocelot.c +++ b/drivers/net/ethernet/mscc/ocelot.c @@ -1716,10 +1716,8 @@ static int ocelot_netdevice_event(struct struct net_device *dev = netdev_notifier_info_to_dev(ptr); int ret = 0;
- if (!ocelot_netdevice_dev_check(dev)) - return 0; - if (event == NETDEV_PRECHANGEUPPER && + ocelot_netdevice_dev_check(dev) && netif_is_lag_master(info->upper_dev)) { struct netdev_lag_upper_info *lag_upper_info = info->upper_info; struct netlink_ext_ack *extack;