netdev - Re: perm

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Message-ID: <1356095395.7055.34.camel@deadeye.wl.decadent.org.uk>
Date:	Fri, 21 Dec 2012 13:09:55 +0000
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Jiri Pirko <jiri@...nulli.us>
CC:	<netdev@...r.kernel.org>
Subject: Re: perm_addr get

On Fri, 2012-12-21 at 14:01 +0100, Jiri Pirko wrote:
> Hi all.
> 
> From what I understand dev->perm_addr is set only in case the hw has
> permanent hw address somewhere written (for example EPROM).
> 
> So when I query device which does not have perm_addr set I get:
> 
> testt1:~$ ethtool -P team0
> Permanent address: 00:00:00:00:00:00
> 
> Is this the correct behaviour? Wouldn't it be more correct if
> ethtool_get_perm_addr() fails with -ENOENT for something like that?

I don't think we should change the implementation now, as someone might
depend on it.  It's trivial to distinguish this not-a-permanent-address
case.  However the ethtool command output could be improved.

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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