From: Felix Fietkau <nbd@openwrt.org>
Date: Sat, 10 Aug 2013 15:31:38 +0000 (+0000)
Subject: ar71xx: allow mtu > 1500 based on the configured tx/rx mtu register value
X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fsvn-archive%2Farchive.git;a=commitdiff_plain;h=c4fbc417be60262fd30a4b5c6ef3221f86a5b363

ar71xx: allow mtu > 1500 based on the configured tx/rx mtu register value

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 37748
---

diff --git a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
index 50029ffafe..5913bb6de4 100644
--- a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
@@ -1042,13 +1042,22 @@ static void ag71xx_netpoll(struct net_device *dev)
 }
 #endif
 
+static int ag71xx_change_mtu(struct net_device *dev, int new_mtu)
+{
+	if (new_mtu < 68 ||
+	    new_mtu > AG71XX_TX_MTU_LEN - ETH_HLEN - ETH_FCS_LEN)
+		return -EINVAL;
+
+	dev->mtu = new_mtu;
+}
+
 static const struct net_device_ops ag71xx_netdev_ops = {
 	.ndo_open		= ag71xx_open,
 	.ndo_stop		= ag71xx_stop,
 	.ndo_start_xmit		= ag71xx_hard_start_xmit,
 	.ndo_do_ioctl		= ag71xx_do_ioctl,
 	.ndo_tx_timeout		= ag71xx_tx_timeout,
-	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_change_mtu		= ag71xx_change_mtu,
 	.ndo_set_mac_address	= eth_mac_addr,
 	.ndo_validate_addr	= eth_validate_addr,
 #ifdef CONFIG_NET_POLL_CONTROLLER