smsc9420: handle magic field of ethtool_eeprom
ethtool.h says the driver should set the magic field in get_eeprom and verify it in set_eeprom. This patch adds this functionality using an arbitary driver-specific magic value constant (0x9420). Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -413,6 +413,7 @@ static int smsc9420_ethtool_get_eeprom(struct net_device *dev,
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}
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memcpy(data, &eeprom_data[eeprom->offset], len);
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eeprom->magic = SMSC9420_EEPROM_MAGIC;
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eeprom->len = len;
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return 0;
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}
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@ -423,6 +424,9 @@ static int smsc9420_ethtool_set_eeprom(struct net_device *dev,
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struct smsc9420_pdata *pd = netdev_priv(dev);
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int ret;
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if (eeprom->magic != SMSC9420_EEPROM_MAGIC)
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return -EINVAL;
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smsc9420_eeprom_enable_access(pd);
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smsc9420_eeprom_send_cmd(pd, E2P_CMD_EPC_CMD_EWEN_);
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ret = smsc9420_eeprom_write_location(pd, eeprom->offset, *data);
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@ -44,6 +44,7 @@
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#define LAN_REGISTER_EXTENT (0x400)
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#define SMSC9420_EEPROM_SIZE ((u32)11)
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#define SMSC9420_EEPROM_MAGIC (0x9420)
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#define PKT_BUF_SZ (VLAN_ETH_FRAME_LEN + NET_IP_ALIGN + 4)
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