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authorSteve Glendinning <steve.glendinning@smsc.com>2009-02-15 22:55:01 +0000
committerDavid S. Miller <davem@davemloft.net>2009-02-20 00:38:51 -0800
commit196b7e1b9cca9e187bb61fa7d60f04f4ab2c0592 (patch)
tree50ba17d2078c3cd7465bfe1cafb6fc720ef83f63
parent62660e28084df3d8067ab855f326d3027808c569 (diff)
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>
-rw-r--r--drivers/net/smsc9420.c4
-rw-r--r--drivers/net/smsc9420.h1
2 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/smsc9420.c b/drivers/net/smsc9420.c
index 83938e1953b..4e15ae068b3 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 69c351f93f8..e441402f77a 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)