linux-kernel - Re: IT821x: no DMA since 2.6.21

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Date:	Tue, 15 May 2007 13:35:55 +0200
From:	Thomas Kuther <gimpel@...nenkinder.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: IT821x: no DMA since 2.6.21

On Di, 15.05.07 12:31 Alan Cox <alan@...rguk.ukuu.org.uk> wrote:

> On Tue, 15 May 2007 12:53:08 +0200
> Thomas Kuther <gimpel@...nenkinder.org> wrote:
> 
> > Hi!
> > 
> > Since 2.6.21 I have a problem with the it821x driver on my ITE 8212
> > controller.
> > Now I saw some updates to it821x in 2.6.22-rc1 and gave that a try,
> > but the problem persists.
> 
> I've had multiple reports of this. I would recommend you use the
> libata driver. IT821x hasn't changed over the past few releases so
> its someting in the core IDE code that broke it [note it might not of
> course be that the problem is in the core code..].
> 
> I have no plans at this point to debug the old IT821x driver due to
> time constraints, and if anyone wants to have a crack at debugging
> this and fixing it go for it.
> 
> BTW: I also note you have the controller in smart mode but are not
> using the hardware raid functions. In that situation it generally
> runs faster (and does CD-ROM) if you flash the ATAPI firmware to the
> controller or boot with the noraid option "it8212.noraid=1"
> 
> Alan

Hi Alan,
thanks for the suggestion. 

I already tried pata_it821x and it failed to recognize the second
harddisk hdf. I use the controller only for additional harddrives, no
RAID, no cd-rom.

But I will try again. Maybe I just did something wrong then.

Thanks,
Thomas

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