ethernet/toshiba: use core min/max MTU checking

gelic_net: min_mtu 64, max_mtu 1518
- remove gelic_net_change_mtu now that it is redundant

spidernet: min_Mtu 64, max_mtu 2294
- remove spiter_net_change_mtu now that it is redundant

CC: [e-mail]
CC: Geoff Levand <[e-mail]>
CC: Ishizaki Kou <[e-mail]>
Signed-off-by: Jarod Wilson <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/toshiba/ps3_gelic_net.c

···
 	}
 	return packets_done;
 }
-/**
- * gelic_net_change_mtu - changes the MTU of an interface
- * @netdev: interface device structure
- * @new_mtu: new MTU value
- *
- * returns 0 on success, <0 on failure
- */
-int gelic_net_change_mtu(struct net_device *netdev, int new_mtu)
-{
-	/* no need to re-alloc skbs or so -- the max mtu is about 2.3k
-	 * and mtu is outbound only anyway */
-	if ((new_mtu < GELIC_NET_MIN_MTU) ||
-	    (new_mtu > GELIC_NET_MAX_MTU)) {
-		return -EINVAL;
-	}
-	netdev->mtu = new_mtu;
-	return 0;
-}
 
 /**
  * gelic_card_interrupt - event handler for gelic_net
···
 	.ndo_stop = gelic_net_stop,
 	.ndo_start_xmit = gelic_net_xmit,
 	.ndo_set_rx_mode = gelic_net_set_multi,
-	.ndo_change_mtu = gelic_net_change_mtu,
 	.ndo_tx_timeout = gelic_net_tx_timeout,
 	.ndo_set_mac_address = eth_mac_addr,
 	.ndo_validate_addr = eth_validate_addr,
···
 		 */
 		netdev->features |= NETIF_F_VLAN_CHALLENGED;
 	}
+
+	/* MTU range: 64 - 1518 */
+	netdev->min_mtu = GELIC_NET_MIN_MTU;
+	netdev->max_mtu = GELIC_NET_MAX_MTU;
 
 	status = register_netdev(netdev);
 	if (status) {

drivers/net/ethernet/toshiba/ps3_gelic_net.h

···
 int gelic_net_xmit(struct sk_buff *skb, struct net_device *netdev);
 void gelic_net_set_multi(struct net_device *netdev);
 void gelic_net_tx_timeout(struct net_device *netdev);
-int gelic_net_change_mtu(struct net_device *netdev, int new_mtu);
 int gelic_net_setup_netdev(struct net_device *netdev, struct gelic_card *card);
 
 /* shared ethtool ops */

drivers/net/ethernet/toshiba/ps3_gelic_wireless.c

···
 	.ndo_stop = gelic_wl_stop,
 	.ndo_start_xmit = gelic_net_xmit,
 	.ndo_set_rx_mode = gelic_net_set_multi,
-	.ndo_change_mtu = gelic_net_change_mtu,
 	.ndo_tx_timeout = gelic_net_tx_timeout,
 	.ndo_set_mac_address = eth_mac_addr,
 	.ndo_validate_addr = eth_validate_addr,

drivers/net/ethernet/toshiba/spider_net.c

···
 }
 
 /**
- * spider_net_change_mtu - changes the MTU of an interface
- * @netdev: interface device structure
- * @new_mtu: new MTU value
- *
- * returns 0 on success, <0 on failure
- */
-static int
-spider_net_change_mtu(struct net_device *netdev, int new_mtu)
-{
-	/* no need to re-alloc skbs or so -- the max mtu is about 2.3k
-	 * and mtu is outbound only anyway */
-	if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
-		(new_mtu > SPIDER_NET_MAX_MTU) )
-		return -EINVAL;
-	netdev->mtu = new_mtu;
-	return 0;
-}
-
-/**
  * spider_net_set_mac - sets the MAC of an interface
  * @netdev: interface device structure
  * @ptr: pointer to new MAC address
···
 	.ndo_start_xmit		= spider_net_xmit,
 	.ndo_set_rx_mode	= spider_net_set_multi,
 	.ndo_set_mac_address	= spider_net_set_mac,
-	.ndo_change_mtu		= spider_net_change_mtu,
 	.ndo_do_ioctl		= spider_net_do_ioctl,
 	.ndo_tx_timeout		= spider_net_tx_timeout,
 	.ndo_validate_addr	= eth_validate_addr,
···
 	netdev->features |= NETIF_F_IP_CSUM | NETIF_F_LLTX;
 	/* some time: NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
 	 *		NETIF_F_HW_VLAN_CTAG_FILTER */
+
+	/* MTU range: 64 - 2294 */
+	netdev->min_mtu = SPIDER_NET_MIN_MTU;
+	netdev->max_mtu = SPIDER_NET_MAX_MTU;
 
 	netdev->irq = card->pdev->irq;
 	card->num_rx_ints = 0;