linux-kernel - Re: [PATCH 16/16] wl1251: Add sysfs file address for setting permanent mac address

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Message-Id: <201310281604.48542@pali>
Date:	Mon, 28 Oct 2013 16:04:48 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	Dan Williams <dcbw@...hat.com>, Luciano Coelho <luca@...lho.fi>,
	"John W. Linville" <linville@...driver.com>,
	"David S. Miller" <davem@...emloft.net>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, freemangordon@....bg,
	aaro.koskinen@....fi, pavel@....cz, sre@...g0.de,
	joni.lapilainen@...il.com
Subject: Re: [PATCH 16/16] wl1251: Add sysfs file address for setting permanent mac address

On Monday 28 October 2013 15:56:55 Johannes Berg wrote:
> On Mon, 2013-10-28 at 09:46 -0500, Dan Williams wrote:
> > If the device doesn't actually *have* a permanent MAC
> > address, then it shouldn't be returning one via ethtool,
> > and should return an error for ETHTOOL_GPERMADDR.
> 
> There's currently no provision for that, but I agree it would
> be better to do so.
> 
> johannes

So what to do with devices which has MAC address stored in some 
obscure place and there is userspace binary which can read it?

I think that there should be some way to tell kernel that *this* 
is the permanent address and it should use it.

This is reason why I proposed patch which adding sysfs entry for 
setting permanent address from userspace in wl1251 driver.

-- 
Pali Rohár
pali.rohar@...il.com

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