linux-kernel - Re: [PATCH] drivers/net/defxx.c: use %pM to show MAC address

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Message-ID: <alpine.LFD.2.00.1001041833560.13474@eddie.linux-mips.org>
Date:	Mon, 4 Jan 2010 18:49:48 +0000 (GMT)
From:	"Maciej W. Rozycki" <macro@...ux-mips.org>
To:	H Hartley Sweeten <hartleys@...ionengravers.com>
cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH] drivers/net/defxx.c: use %pM to show MAC address

On Wed, 30 Dec 2009, H Hartley Sweeten wrote:

> Use the %pM kernel extension to display the MAC address.
> 
> The only difference in the output is that the MAC address is
> shown in the usual colon-separated hex notation.
> 
> Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
> Cc: David S. Miller <davem@...emloft.net>

 Nack.  While I appreciate your effort, the FDDI standard defines opposite 
bit-ordering for MAC addresses written in the dash-separated and the 
colon-separated hexadecimal notation, which makes your change invalid, 
sorry (you'd have to bit-swap them too and that would make addresses 
counter-intuitive).  Please note that `ifconfig' consistently uses the 
dash-separated notation for FDDI interfaces too (I haven't checked other 
tools like those in the "iproute" package; they may be buggy).

 [I'd appreciate to be CCed on patch submissions to code I claim 
maintenance of too.]

  Maciej
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