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Commit ef786f10 authored by Alban Bedel's avatar Alban Bedel Committed by David S. Miller
Browse files

8139too: Allow setting MTU larger than 1500 



Replace the default ndo_change_mtu callback with one that allow
setting MTU that the driver can handle.

Signed-off-by: default avatarAlban Bedel <albeu@free.fr>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b9217266

drivers/net/ethernet/realtek/8139too.c

+12 −1
Original line number Diff line number Diff line
@@ -185,6 +185,9 @@ static int debug = -1; 
/* max supported ethernet frame size -- must be at least (dev->mtu+14+4).*/

#define MAX_ETH_FRAME_SIZE	1536



/* max supported payload size */

#define MAX_ETH_DATA_SIZE	(MAX_ETH_FRAME_SIZE - ETH_HLEN - ETH_FCS_LEN)



/* Size of the Tx bounce buffers -- must be at least (dev->mtu+14+4). */

#define TX_BUF_SIZE	MAX_ETH_FRAME_SIZE

#define TX_BUF_TOT_LEN	(TX_BUF_SIZE * NUM_TX_DESC)
@@ -920,11 +923,19 @@ static int rtl8139_set_features(struct net_device *dev, netdev_features_t featur 
	return 0;

}



static int rtl8139_change_mtu(struct net_device *dev, int new_mtu)

{

	if (new_mtu < 68 || new_mtu > MAX_ETH_DATA_SIZE)

		return -EINVAL;

	dev->mtu = new_mtu;

	return 0;

}



static const struct net_device_ops rtl8139_netdev_ops = {

	.ndo_open		= rtl8139_open,

	.ndo_stop		= rtl8139_close,

	.ndo_get_stats64	= rtl8139_get_stats64,

	.ndo_change_mtu		= eth_change_mtu,

	.ndo_change_mtu		= rtl8139_change_mtu,

	.ndo_validate_addr	= eth_validate_addr,

	.ndo_set_mac_address 	= rtl8139_set_mac_address,

	.ndo_start_xmit		= rtl8139_start_xmit,