linux-kernel - Re: commit 7e92b4fc34 - x86, serial: convert legacy COM ports to platform devices

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Date:	Thu, 26 Jul 2007 10:08:03 +0200
From:	Sébastien Dugué <sebastien.dugue@...l.net>
To:	Bjorn Helgaas <bjorn.helgaas@...com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>, ambx1@....rr.com,
	akpm@...ux-foundation.org, lenb@...nel.org, rmk@....linux.org.uk,
	mjg59@...f.ucam.org, castet.matthieu@...e.fr, shaohua.li@...el.com,
	"Yinghai Lu" <yhlu.kernel@...il.com>
Subject: Re: commit 7e92b4fc34 - x86, serial: convert legacy COM ports to
 platform devices - broke my serial console


On Wed, 25 Jul 2007 16:41:23 -0600 Bjorn Helgaas <bjorn.helgaas@...com> wrote:

> On Wednesday 25 July 2007 07:32:53 am Sébastien Dugué wrote:
> > On Wed, 25 Jul 2007 07:16:44 -0600 Bjorn Helgaas <bjorn.helgaas@...com> wrote:
> > 
> > > The _DDN is a "DOS device name", and the _UID is a "logical device ID
> > > that does not change across reboots."  Both are optional, and PNPACPI
> > > ignores them.  But maybe we could change PNPACPI to sort by them if
> > > they are present.  I'll think about this a bit.
> > 
> >   That would be nice, but I wish you good luck with all those
> > crappy BIOSes out there.
> 
> Yeah, it's an ugly world we live in.  Would you be able to try the
> attached patch just for testing?  It should sort devices with the
> same _HID by their _UID.  It doesn't have any effect on my systems,
> because my devices are already ordered by _UID by default.  But I
> think it should switch your COM1/COM2 ports back to the order you
> expect.
> 

  Works well, thanks Bjorn.

  Sébastien.
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