netdev - Re: odd RTL8139 quirk.

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Date:	Tue, 29 Apr 2008 18:04:06 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Dave Jones <davej@...hat.com>
CC:	netdev@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: odd RTL8139 quirk.

Dave Jones wrote:
> On Tue, Apr 29, 2008 at 03:37:41PM -0400, Jeff Garzik wrote:
>  > Dave Jones wrote:
>  > > I've just been playing with a model 2 OQO, which has an RTL8139.
>  > > It gets detected just fine, though it doesn't actually work..
>  > > 
>  > > eth0: RealTek RTL8139 at 0xf8830000, 00:00:00:00:00:00, IRQ 18
>  > > eth0:  Identified 8139 chip type 'RTL-8139'
>  > > 
>  > > The null MAC address being one clue.  Another oddity is that
>  > > ethtool reports that there's no link detected, even though there is.
>  > > (Enough for it to PXE boot a kernel from at least :)
>  > > 
>  > > Futzing with the debug= modparam didn't yield anything extra at all.
>  > > 
>  > > Any clues?
>  > 
>  > Sounds like a broken EEPROM.  Does supplying a MAC via ifconfig prior to 
>  > 'ifconfig ... up' help?
> 
> Ah. This sounds enlightening: http://www.oqotalk.com/index.php/topic,1511.0.html
> Seems a shame to have to choose PIO vs MMIO for a distro kernel though.
> Would there be any objection to turning that into a modparam ?
> (If we wanted to get really fancy, we could even quirk around it automatically
>  when we detect broken hardware).

Something like this?  :)

http://www.linux.sgi.com/archives/netdev/2004-11/msg00226.html

It did not go upstream but it needed some init-time bug fixing, IIRC. 
Maybe akpm remembers more why my patch sucked... :)

	Jeff



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