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From: Andrew Morton <akpm@digeo.com>
To: "J.A. Magallon" <jamagallon@able.es>
Subject: Re: updated CDROMREADAUDIO DMA patch
Date: Sun, 12 Jan 2003 17:16:43 -0800
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On Sun January 12 2003 15:16, J.A. Magallon wrote:
>
> On 2003.01.05 Andrew Morton wrote:
> > A refresh and retest of this patch, against 2.4.21-pre2.  It would
> > be helpful if a few (or a lot of) people could test this, and report
> > on the result.   Otherwise it'll never get anywhere...
> > 
> > Reading audio from IDE CDROMs always uses PIO.  This patch teaches the kernel
> > to use DMA for the CDROMREADAUDIO ioctl.
> > 
> 
> cdparanoia oopses on top of latest -aa:
> 
> Checking /dev/cdrom for cdrom...
> Testing /dev/cdrom for cooked ioctl() interface
>     CDROM sensed: ATAPI compatible CREATIVE CD5230E
> Verifying drive can read CDDA...
> Unable to handle kernel NULL pointer dereference at virtual address 00000014

Yup, we seem to have a bit of a problem there.  It works fine on the five
machines which I tried it on.

Oh well, thanks for testing.  It's unlikely that I will do any further work
on this.


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