diff mbox series

[5.4,82/86] net: mscc: ocelot: allow offloading of bridge on top of LAG

Message ID 20210125183204.520907156@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg KH Jan. 25, 2021, 6:40 p.m. UTC 
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(-)
diff mbox series

Patch

--- 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;