AuxXxilium/linux_dsm_epyc7002
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dm9601: handle corrupt mac address

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Some cheap devices ship with dangling EEPROM pins!
They always return invalid address ff:ff:ff:ff:ff:ff.

Inherit the auto-generated address in this case,
so that these products can work with zero configuration.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wu Fengguang 2009-01-06 10:55:10 -08:00 committed by David S. Miller
parent e1c096e251
commit 20f10aa07d
1 changed files with 8 additions and 1 deletions
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9
drivers/net/usb/dm9601.c
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@ -414,6 +414,7 @@ static int dm9601_set_mac_address(struct net_device *net, void *p)
static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf)
{
int ret;
u8 mac[ETH_ALEN];
ret = usbnet_get_endpoints(dev, intf);
if (ret)
@ -438,12 +439,18 @@ static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf)
udelay(20);
/* read MAC */
if (dm_read(dev, DM_PHY_ADDR, ETH_ALEN, dev->net->dev_addr) < 0) {
if (dm_read(dev, DM_PHY_ADDR, ETH_ALEN, mac) < 0) {
printk(KERN_ERR "Error reading MAC address\n");
ret = -ENODEV;
goto out;
}
/*
* Overwrite the auto-generated address only with good ones.
*/
if (is_valid_ether_addr(mac))
memcpy(dev->net->dev_addr, mac, ETH_ALEN);
/* power up phy */
dm_write_reg(dev, DM_GPR_CTRL, 1);
dm_write_reg(dev, DM_GPR_DATA, 0);