[PATCH net-next 4/7] net: marvell: prestera: move netdev topology validation to prestera_main

[Vadym Kochan]

Move handling of PRECHANGEUPPER event from prestera_switchdev to
prestera_main which is responsible for basic netdev events handling
and routing them to related module.

Signed-off-by: Vadym Kochan <vadym.koc...@plvision.eu>
---
 .../ethernet/marvell/prestera/prestera_main.c | 29 +++++++++++++++++--
 .../marvell/prestera/prestera_switchdev.c     | 20 -------------
 2 files changed, 26 insertions(+), 23 deletions(-)

diff --git a/drivers/net/ethernet/marvell/prestera/prestera_main.c 
b/drivers/net/ethernet/marvell/prestera/prestera_main.c
index 25dd903a3e92..53c7628a3938 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_main.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_main.c
@@ -510,13 +510,36 @@ 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,
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_switchdev.c 
b/drivers/net/ethernet/marvell/prestera/prestera_switchdev.c
index 8c2b03151736..7736d5f498c9 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_switchdev.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_switchdev.c
@@ -537,35 +537,15 @@ int prestera_bridge_port_event(struct net_device *dev, 
unsigned long event,
                               void *ptr)
 {
        struct netdev_notifier_changeupper_info *info = ptr;
-       struct netlink_ext_ack *extack;
        struct prestera_port *port;
        struct net_device *upper;
        int err;
 
-       extack = netdev_notifier_info_to_extack(&info->info);
        port = netdev_priv(dev);
        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:
-               if (!netif_is_bridge_master(upper))
-                       break;
-
                if (info->linking) {
                        err = prestera_port_bridge_join(port, upper);
                        if (err)
-- 
2.17.1