linux-kernel - Re: [PATCH 0/5] Detect hwmon and i2c bus drivers interfering with ACPI Operation Region resources

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Date:	Fri, 26 Oct 2007 22:39:42 +0200
From:	Jean Delvare <khali@...ux-fr.org>
To:	Bjorn Helgaas <bjorn.helgaas@...com>
Cc:	trenn@...e.de, linux-acpi <linux-acpi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Len Brown <lenb@...nel.org>, Andrew Morton <akpm@...l.org>
Subject: Re: [PATCH 0/5] Detect hwmon and i2c bus drivers interfering with
 ACPI Operation Region resources

Hi Bjorn,

On Fri, 26 Oct 2007 07:09:19 -0600, Bjorn Helgaas wrote:
> On Friday 26 October 2007 4:45:20 am Thomas Renninger wrote:
> > Maybe the list set up by this patch set should be similarly exported
> > like /proc/ioports /proc/iomem
> > to where ever appropriate (maybe /sys/devices/system/acpi/opreg_io
> > and /sys/devices/system/acpi/opreg_mem?) to get a better overview what
> > kind of devices are served by the Op regions on different machines.
> 
> I want to try hard to avoid making ACPI a special case in this way.
> The current /proc/io{ports,mem} contains reservations for everything
> else.  I'd hate to have to look two places just because of ACPI.

I agree. I consider the patches Thomas and myself just posted as a
temporary workaround (even though we can't say how long this
"temporary" will last). Ideally, we should register the I/O ports
declared in ACPI OpRegions - just not now as it would break too many
drivers. Time we tell how "clean" we manage to go.

-- 
Jean Delvare
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