--- zzzz-none-000/linux-3.10.107/net/ethernet/eth.c	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/net/ethernet/eth.c	2021-11-10 11:53:56.000000000 +0000
@@ -37,6 +37,13 @@
  *		as published by the Free Software Foundation; either version
  *		2 of the License, or (at your option) any later version.
  */
+ 
+/**
+ * Some part of this file is modified by Ikanos Communications. 
+ *
+ * Copyright (C) 2013-2014 Ikanos Communications.
+ */  
+ 
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
@@ -59,6 +66,9 @@
 #include <net/ip.h>
 #include <net/dsa.h>
 #include <asm/uaccess.h>
+#if defined(CONFIG_MACH_FUSIV)
+#define MAX_ETH_DATA_LEN 1710
+#endif
 
 __setup("ether=", netdev_boot_setup);
 
@@ -333,7 +343,11 @@
  */
 int eth_change_mtu(struct net_device *dev, int new_mtu)
 {
+#ifdef CONFIG_MACH_FUSIV
+    if (new_mtu < 68 || new_mtu > MAX_ETH_DATA_LEN)
+#else
 	if (new_mtu < 68 || new_mtu > ETH_DATA_LEN)
+#endif
 		return -EINVAL;
 	dev->mtu = new_mtu;
 	return 0;