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path: root/drivers/net/usb/dm9601.c
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Diffstat (limited to 'drivers/net/usb/dm9601.c')
-rw-r--r--drivers/net/usb/dm9601.c29
1 files changed, 25 insertions, 4 deletions
diff --git a/drivers/net/usb/dm9601.c b/drivers/net/usb/dm9601.c
index edd244f3acb5..5b67bbf1987e 100644
--- a/drivers/net/usb/dm9601.c
+++ b/drivers/net/usb/dm9601.c
@@ -23,7 +23,7 @@
#include <linux/usb/usbnet.h>
/* datasheet:
- http://www.davicom.com.tw/big5/download/Data%20Sheet/DM9601-DS-P01-930914.pdf
+ http://ptm2.cc.utu.fi/ftp/network/cards/DM9601/From_NET/DM9601-DS-P01-930914.pdf
*/
/* control requests */
@@ -397,16 +397,24 @@ static void dm9601_set_multicast(struct net_device *net)
dm_write_reg_async(dev, DM_RX_CTRL, rx_ctl);
}
+static void __dm9601_set_mac_address(struct usbnet *dev)
+{
+ dm_write_async(dev, DM_PHY_ADDR, ETH_ALEN, dev->net->dev_addr);
+}
+
static int dm9601_set_mac_address(struct net_device *net, void *p)
{
struct sockaddr *addr = p;
struct usbnet *dev = netdev_priv(net);
- if (!is_valid_ether_addr(addr->sa_data))
+ if (!is_valid_ether_addr(addr->sa_data)) {
+ dev_err(&net->dev, "not setting invalid mac address %pM\n",
+ addr->sa_data);
return -EINVAL;
+ }
memcpy(net->dev_addr, addr->sa_data, net->addr_len);
- dm_write_async(dev, DM_PHY_ADDR, net->addr_len, net->dev_addr);
+ __dm9601_set_mac_address(dev);
return 0;
}
@@ -414,6 +422,7 @@ 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 +447,24 @@ 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);
+ else {
+ printk(KERN_WARNING
+ "dm9601: No valid MAC address in EEPROM, using %pM\n",
+ dev->net->dev_addr);
+ __dm9601_set_mac_address(dev);
+ }
+
/* power up phy */
dm_write_reg(dev, DM_GPR_CTRL, 1);
dm_write_reg(dev, DM_GPR_DATA, 0);