dm9601: warn on invalid mac address

Add warnings on invalid mac address to help disclose/debug problems.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 2 deletions

diff --git a/drivers/net/usb/dm9601.c b/drivers/net/usb/dm9601.c
index 63e97a387085..5b67bbf1987e 100644
--- a/drivers/net/usb/dm9601.c
+++ b/drivers/net/usb/dm9601.c
@@ -407,8 +407,11 @@ 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);
         __dm9601_set_mac_address(dev);
@@ -455,8 +458,12 @@ static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf)
          */
         if (is_valid_ether_addr(mac))
                 memcpy(dev->net->dev_addr, mac, ETH_ALEN);
-        else
+        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);