From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: 2.6.26-rc1 regression: ISA DMA broken (bisected)
Date: Tue, 13 May 2008 18:01:07 +0100
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To: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Thomas@alsa-project.org, ALSA devel <alsa-devel@alsa-project.org>, Takashi Iwai <tiwai@suse.de>, Rene Herman <rene.herman@keyaccess.nl>, Linux Kernel <linux-kernel@vger.kernel.org>, Glauber Costa <gcosta@redhat.com>, Pete Clements <clem@clem.clem-digital.net>, Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>
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On Tue, 13 May 2008 10:59:32 -0600
Bjorn Helgaas <bjorn.helgaas@hp.com> wrote:

> On Friday 09 May 2008 12:06:55 am Takashi Iwai wrote:
> > Thanks for catching it.  Yeah, the patch looks buggy.  We had an
> > implicit assumption that dev = NULL for ISA devices that require 24bit
> > DMA.
> 
> Naive question #1:  Why don't we have a struct device for these
> ISA devices?  PNP builds a struct device with DMA_24BIT_MASK
> for ISAPNP devices.

Because nobody has done the needed work to get all the old ISA drivers
converted. I guess isa_device would actually be a platform_device
wrapper ?