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From: David Brownell <david-b@pacbell.net>
To: Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [patch 2.6.21-rc5 1/3] parport->dev driver model support
Date: Mon, 26 Mar 2007 15:25:56 -0700
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       Jean Delvare <khali@linux-fr.org>
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On Monday 26 March 2007 2:59 pm, Andrew Morton wrote:
> On Mon, 26 Mar 2007 09:06:19 -0700
> David Brownell <david-b@pacbell.net> wrote:
> 
> > Currently a parport_driver can't get a handle on the device node for the
> > underlying parport (PNPACPI, PCI, etc).  That prevents correct placement
> > of sysfs child nodes, which can affect things like power management.
> > 
> > This patch adds a field to "struct parport" pointing to that device node,
> > and updates non-legacy port drivers to initialize that device pointer.
> > That field replaces the analagous PCI-only support in parport_pc.
> > 
> > Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
> > ---
> > NOTE this depends on an earlier patch to make pnp devices set up DMA,
> > parport is the primary user of legacy i8237 dma infrastructure.
> 
> Confusion reigns.
> 
> To which "earlier patch" do you refer?

The one named "init-dma-masks-in-pnp_dev.patch" in 2.6.21-rc4-mm1 ...