linux-kernel - Re: Linux UIO driver cache problem in PowerPC (fix)

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Date:	Fri, 14 Mar 2008 08:41:33 +0100
From:	Juergen Beisert <juergen127@...uzholzen.de>
To:	linux-kernel@...r.kernel.org
Subject: Re: Linux UIO driver cache problem in PowerPC (fix)

On Thursday 13 March 2008 22:53, Grant Likely wrote:
> On Thu, Mar 13, 2008 at 1:19 AM, Hans-Jürgen Koch <hjk@...utronix.de> wrote:
> > Am Wed, 12 Mar 2008 15:22:59 -0400
> >
> >  schrieb "Jean-Samuel Chenard" <jsamch@...il.com>:
> >  > Hi,
> >
> >  Hi Jean-Samuel,
> >  thanks for your report. Please CC LKML if you find bugs like this. I
> >  also added Grant Likely (PPC Xilinx Virtex maintainer), as it seems to
> >  be a platform specific problem.
>
> Hmmm.  I'm not a memory handling expert so I don't know what's going
> on here.  Josh, does this look like anything that would be ppc405
> related?

The UIO also doesn't work on a MPC5200 CPU. With the additional 
pgprot_noncached() call now it works as expected.

Juergen
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