netdev - Re: [PATCHv2 net-next] net: fec: add fallback to random MAC address

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Message-ID: <51AC7F06.5070805@cogentembedded.com>
Date:	Mon, 03 Jun 2013 15:33:26 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Lucas Stach <l.stach@...gutronix.de>
CC:	netdev@...r.kernel.org, davem@...emloft.net,
	Pavel Machek <pavel@...x.de>
Subject: Re: [PATCHv2 net-next] net: fec: add fallback to random MAC address

On 03-06-2013 15:30, I wrote:

>> If no valid MAC address could be obtained from the hardware,
>> fall back to a randomly generated one.

>> Signed-off-by: Pavel Machek <pavel@...x.de>
>> Signed-off-by: Lucas Stach <l.stach@...gutronix.de>
>> ---
>>   drivers/net/ethernet/freescale/fec_main.c | 12 ++++++++++++
>>   1 file changed, 12 insertions(+)

>> diff --git a/drivers/net/ethernet/freescale/fec_main.c
>> b/drivers/net/ethernet/freescale/fec_main.c
>> index 927f4c6..0063761 100644
>> --- a/drivers/net/ethernet/freescale/fec_main.c
>> +++ b/drivers/net/ethernet/freescale/fec_main.c
>> @@ -1039,6 +1039,18 @@ static void fec_get_mac(struct net_device *ndev)
>>           iap = &tmpaddr[0];
>>       }
>>
>> +    /*
>> +     * 5) random mac address
>> +     */
>> +    if (!is_valid_ether_addr(iap)) {
>> +        /* Report it and use a random ethernet address instead */
>> +        netdev_err(ndev, "Invalid MAC address: %pM\n", iap);
>> +        eth_hw_addr_random(ndev);
>> +        netdev_info(ndev, "Using random MAC address: %pM\n",
>> +                ndev->dev_addr);
>> +        return;
>> +    }
>> +
>>       memcpy(ndev->dev_addr, iap, ETH_ALEN);

>     This was you'll copy an invalid address over the random one again.

   Oh, sorry, have overlooked *return*... :-<

WBR, Sergei


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