netdev - Re: Gianfar driver failing on MPC8641D based board

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Date:	Fri, 26 Feb 2010 11:51:00 +0000
From:	Martyn Welch <martyn.welch@...com>
To:	avorontsov@...mvista.com
CC:	linuxppc-dev list <linuxppc-dev@...abs.org>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Sandeep Gopalpet <Sandeep.Kumar@...escale.com>,
	davem@...emloft.net, Kumar Gala <galak@...nel.crashing.org>
Subject: Re: Gianfar driver failing on MPC8641D based board

Anton Vorontsov wrote:
> On Thu, Feb 25, 2010 at 04:46:54PM +0000, Martyn Welch wrote:
> [...]
>   
>>> nfs: server 192.168.0.1 not responding, still trying
>>>   
>>>       
>> Further testing has shown that this isn't restricted to warm reboots, it
>> happens from cold as well. In addition, the exact timing of the failure
>> seems to vary, some boots have got further before failing.
>>     
>
> Unfortunately I don't have any 8641 boards near me, so I can't
> debug this myself. Though, I tested gianfar on MPC8568E-MDS with
> 2.6.33 kernel, and it seems to work just fine.
>
> I see you use SMP. Can you try to turn it off? If that will fix
> the issue, then it'll be a good data point.
>
> Meanwhile, I'll try SMP kernel on MPC8568 (UP), and let you
> know the results.
>
> Thanks

I removed the second core from the dts file rather than truly disabling
SMP in the kernel config. Doing this allowed the board to boot reliably.

Martyn

-- 
Martyn Welch (Principal Software Engineer)   |   Registered in England and
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T +44(0)127322748                            |   Barbirolli Square, Manchester,
E martyn.welch@...com                        |   M2 3AB  VAT:GB 927559189

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