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8139too: Allow setting MTU larger than 1500

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

Signed-off-by: Alban Bedel <albeu@free.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alban Bedel 2014-11-08 12:48:35 +01:00 committed by David S. Miller
parent b92172661e
commit ef786f106f
1 changed files with 12 additions and 1 deletions
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13
drivers/net/ethernet/realtek/8139too.c
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@ -185,6 +185,9 @@ static int debug = -1;
/* max supported ethernet frame size -- must be at least (dev->mtu+14+4).*/ /* max supported ethernet frame size -- must be at least (dev->mtu+14+4).*/
#define MAX_ETH_FRAME_SIZE 1536 #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). */ /* 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_SIZE MAX_ETH_FRAME_SIZE
#define TX_BUF_TOT_LEN (TX_BUF_SIZE * NUM_TX_DESC) #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; 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 = { static const struct net_device_ops rtl8139_netdev_ops = {
.ndo_open = rtl8139_open, .ndo_open = rtl8139_open,
.ndo_stop = rtl8139_close, .ndo_stop = rtl8139_close,
.ndo_get_stats64 = rtl8139_get_stats64, .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_validate_addr = eth_validate_addr,
.ndo_set_mac_address = rtl8139_set_mac_address, .ndo_set_mac_address = rtl8139_set_mac_address,
.ndo_start_xmit = rtl8139_start_xmit, .ndo_start_xmit = rtl8139_start_xmit,