net: switchdev: propagate extack to port attributes

When a struct switchdev_attr is notified through switchdev, there is no
way to report informational messages, unlike for struct switchdev_obj.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index 94113ca..0b84f07 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -488,14 +488,18 @@ static int __switchdev_handle_port_attr_set(struct net_device *dev,
 			struct switchdev_notifier_port_attr_info *port_attr_info,
 			bool (*check_cb)(const struct net_device *dev),
 			int (*set_cb)(struct net_device *dev,
-				      const struct switchdev_attr *attr))
+				      const struct switchdev_attr *attr,
+				      struct netlink_ext_ack *extack))
 {
+	struct netlink_ext_ack *extack;
 	struct net_device *lower_dev;
 	struct list_head *iter;
 	int err = -EOPNOTSUPP;
 
+	extack = switchdev_notifier_info_to_extack(&port_attr_info->info);
+
 	if (check_cb(dev)) {
-		err = set_cb(dev, port_attr_info->attr);
+		err = set_cb(dev, port_attr_info->attr, extack);
 		if (err != -EOPNOTSUPP)
 			port_attr_info->handled = true;
 		return err;
@@ -525,7 +529,8 @@ int switchdev_handle_port_attr_set(struct net_device *dev,
 			struct switchdev_notifier_port_attr_info *port_attr_info,
 			bool (*check_cb)(const struct net_device *dev),
 			int (*set_cb)(struct net_device *dev,
-				      const struct switchdev_attr *attr))
+				      const struct switchdev_attr *attr,
+				      struct netlink_ext_ack *extack))
 {
 	int err;