diff options
Diffstat (limited to 'drivers/net/ethernet/marvell/prestera/prestera_main.c')
| -rw-r--r-- | drivers/net/ethernet/marvell/prestera/prestera_main.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_main.c b/drivers/net/ethernet/marvell/prestera/prestera_main.c index 2768c78528a5..767a06862662 100644 --- a/drivers/net/ethernet/marvell/prestera/prestera_main.c +++ b/drivers/net/ethernet/marvell/prestera/prestera_main.c @@ -508,13 +508,36 @@ struct prestera_port *prestera_port_dev_lower_find(struct net_device *dev) static int prestera_netdev_port_event(struct net_device *dev, unsigned long event, void *ptr) { + struct netdev_notifier_changeupper_info *info = ptr; + struct netlink_ext_ack *extack; + struct net_device *upper; + + extack = netdev_notifier_info_to_extack(&info->info); + upper = info->upper_dev; + switch (event) { case NETDEV_PRECHANGEUPPER: + if (!netif_is_bridge_master(upper)) { + NL_SET_ERR_MSG_MOD(extack, "Unknown upper device type"); + return -EINVAL; + } + + if (!info->linking) + break; + + if (netdev_has_any_upper_dev(upper)) { + NL_SET_ERR_MSG_MOD(extack, "Upper device is already enslaved"); + return -EINVAL; + } + break; + case NETDEV_CHANGEUPPER: - return prestera_bridge_port_event(dev, event, ptr); - default: - return 0; + if (netif_is_bridge_master(upper)) + return prestera_bridge_port_event(dev, event, ptr); + break; } + + return 0; } static int prestera_netdev_event_handler(struct notifier_block *nb, |