From: Steve Glendinning Date: Sun, 15 Feb 2009 22:55:01 +0000 (+0000) Subject: smsc9420: handle magic field of ethtool_eeprom X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=196b7e1b9cca9e187bb61fa7d60f04f4ab2c0592;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git 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 Signed-off-by: David S. Miller --- diff --git a/drivers/net/smsc9420.c b/drivers/net/smsc9420.c index 83938e1953b0..4e15ae068b3f 100644 --- a/drivers/net/smsc9420.c +++ b/drivers/net/smsc9420.c @@ -413,6 +413,7 @@ static int smsc9420_ethtool_get_eeprom(struct net_device *dev, } memcpy(data, &eeprom_data[eeprom->offset], len); + eeprom->magic = SMSC9420_EEPROM_MAGIC; eeprom->len = len; return 0; } @@ -423,6 +424,9 @@ static int smsc9420_ethtool_set_eeprom(struct net_device *dev, struct smsc9420_pdata *pd = netdev_priv(dev); int ret; + if (eeprom->magic != SMSC9420_EEPROM_MAGIC) + return -EINVAL; + smsc9420_eeprom_enable_access(pd); smsc9420_eeprom_send_cmd(pd, E2P_CMD_EPC_CMD_EWEN_); ret = smsc9420_eeprom_write_location(pd, eeprom->offset, *data); diff --git a/drivers/net/smsc9420.h b/drivers/net/smsc9420.h index 69c351f93f86..e441402f77a2 100644 --- a/drivers/net/smsc9420.h +++ b/drivers/net/smsc9420.h @@ -44,6 +44,7 @@ #define LAN_REGISTER_EXTENT (0x400) #define SMSC9420_EEPROM_SIZE ((u32)11) +#define SMSC9420_EEPROM_MAGIC (0x9420) #define PKT_BUF_SZ (VLAN_ETH_FRAME_LEN + NET_IP_ALIGN + 4)