release/5.2.28/net-mscc-ocelot-don-t-handle-netdev-events-for-other.patch

From fe4c000d3c903620ab834ef54670263efe3b3545 Mon Sep 17 00:00:00 2001
From: Claudiu Manoil <claudiu.manoil@nxp.com>
Date: Tue, 5 Nov 2019 23:50:13 +0200
Subject: [PATCH] net: mscc: ocelot: don't handle netdev events for other
 netdevs

commit 7afb3e575e5aa9f5a200a3eb3f45d8130f6d6601 upstream.

The check that the event is actually for this device should be moved
from the "port" handler to the net device handler.

Otherwise the port handler will deny bonding configuration for other
net devices in the same system (like enetc in the LS1028A) that don't
have the lag_upper_info->tx_type restriction that ocelot has.

Fixes: dc96ee3730fc ("net: mscc: ocelot: add bonding support")
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index 58e76e7cb0d6..e5d93556d59a 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -1483,9 +1483,6 @@ static int ocelot_netdevice_port_event(struct net_device *dev,
 	struct ocelot_port *ocelot_port = netdev_priv(dev);
 	int err = 0;
 
-	if (!ocelot_netdevice_dev_check(dev))
-		return 0;
-
 	switch (event) {
 	case NETDEV_CHANGEUPPER:
 		if (netif_is_bridge_master(info->upper_dev)) {
@@ -1522,6 +1519,9 @@ static int ocelot_netdevice_event(struct notifier_block *unused,
 	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 &&
 	    netif_is_lag_master(info->upper_dev)) {
 		struct netdev_lag_upper_info *lag_upper_info = info->upper_info;
-- 
2.7.4