ethernet/neterion: use core min/max MTU checking

s2io: min_mtu 46, max_mtu 9600

vxge: min_mtu 68, max_mtu 9600

CC: netdev@vger.kernel.org
CC: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/neterion/vxge/vxge-config.h

@@ -27,7 +27,7 @@
 	(((size) - (((u64)adrs) & ((size)-1))) & ((size)-1))
 #endif
 
-#define VXGE_HW_MIN_MTU				68
+#define VXGE_HW_MIN_MTU				ETH_MIN_MTU
 #define VXGE_HW_MAX_MTU				9600
 #define VXGE_HW_DEFAULT_MTU			1500
 

drivers/net/ethernet/neterion/vxge/vxge-main.c

@@ -3074,11 +3074,6 @@ static int vxge_change_mtu(struct net_device *dev, int new_mtu)
 
 	vxge_debug_entryexit(vdev->level_trace,
 		"%s:%d", __func__, __LINE__);
-	if ((new_mtu < VXGE_HW_MIN_MTU) || (new_mtu > VXGE_HW_MAX_MTU)) {
-		vxge_debug_init(vdev->level_err,
-			"%s: mtu size is invalid", dev->name);
-		return -EPERM;
-	}
 
 	/* check if device is down already */
 	if (unlikely(!is_vxge_card_up(vdev))) {
@@ -3462,6 +3457,10 @@ static int vxge_device_register(struct __vxge_hw_device *hldev,
 			"%s : using High DMA", __func__);
 	}
 
+	/* MTU range: 68 - 9600 */
+	ndev->min_mtu = VXGE_HW_MIN_MTU;
+	ndev->max_mtu = VXGE_HW_MAX_MTU;
+
 	ret = register_netdev(ndev);
 	if (ret) {
 		vxge_debug_init(vxge_hw_device_trace_level_get(hldev),