net: use core MTU range checking in WAN drivers

- set min/max_mtu in all hdlc drivers, remove hdlc_change_mtu
- sent max_mtu in lec driver, remove lec_change_mtu
- set min/max_mtu in x25_asy driver

CC: netdev@vger.kernel.org
CC: Krzysztof Halasa <khc@pm.waw.pl>
CC: Krzysztof Halasa <khalasa@piap.pl>
CC: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
CC: Francois Romieu <romieu@fr.zoreil.com>
CC: Kevin Curtis <kevin.curtis@farsite.co.uk>
CC: Zhao Qiang <qiang.zhao@nxp.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 10 deletions

diff --git a/net/atm/lec.c b/net/atm/lec.c
index 5d2693826afb..779b3fa6052d 100644
--- a/net/atm/lec.c
+++ b/net/atm/lec.c
@@ -544,15 +544,6 @@ send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
         return 0;
 }
 
-/* shamelessly stolen from drivers/net/net_init.c */
-static int lec_change_mtu(struct net_device *dev, int new_mtu)
-{
-        if ((new_mtu < 68) || (new_mtu > 18190))
-                return -EINVAL;
-        dev->mtu = new_mtu;
-        return 0;
-}
-
 static void lec_set_multicast_list(struct net_device *dev)
 {
         /*
@@ -565,7 +556,6 @@ static const struct net_device_ops lec_netdev_ops = {
         .ndo_open               = lec_open,
         .ndo_stop               = lec_close,
         .ndo_start_xmit         = lec_start_xmit,
-        .ndo_change_mtu         = lec_change_mtu,
         .ndo_tx_timeout         = lec_tx_timeout,
         .ndo_set_rx_mode        = lec_set_multicast_list,
 };
@@ -742,6 +732,7 @@ static int lecd_attach(struct atm_vcc *vcc, int arg)
                 if (!dev_lec[i])
                         return -ENOMEM;
                 dev_lec[i]->netdev_ops = &lec_netdev_ops;
+                dev_lec[i]->max_mtu = 18190;
                 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
                 if (register_netdev(dev_lec[i])) {
                         free_netdev(dev_lec[i]);