netdev - Re: [PATCH v2 net-next] net: ethernet: enc28j60: add device tree support

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Date:	Mon, 25 Apr 2016 13:04:56 -0500
From:	"Andrew F. Davis" <afd@...com>
To:	Michael Heimpold <mhei@...mpold.de>
CC:	Jonathan Cameron <jic23@...nel.org>,
	Mark Brown <broonie@...nel.org>, <netdev@...r.kernel.org>,
	<devicetree@...r.kernel.org>, Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>
Subject: Re: [PATCH v2 net-next] net: ethernet: enc28j60: add device tree
 support

On 04/25/2016 12:46 PM, Michael Heimpold wrote:
> Hi,
> 
> Am Monday 25 April 2016, 10:39:41 schrieben Sie:
>> On 04/24/2016 04:28 PM, Michael Heimpold wrote:
>>> -	eth_hw_addr_random(dev);
>>> +
>>> +	macaddr = of_get_mac_address(spi->dev.of_node);
>>> +	if (macaddr)
>>
>> You should also check if it is a valid MAC for Ethernet, recommend:
>>
>> if (macaddr && is_valid_ether_addr(macaddr))
>>
> 
> But of_get_mac_address already takes care of this, see
> http://lxr.free-electrons.com/source/drivers/of/of_net.c#L45
> Also it already checks whether spi->dev.of_node is populated at all.
> It returns NULL in both error cases.
> So I prefered to omit both test here.
> 

Ah, missed that, no problem here then.

Hmm, I wonder how many other drivers then do this check needlessly..
Time to fire-up Coccinelle :)

Andrew