linux-kernel - Re: [lm-sensors] 2.6.24-rc4 hwmon it87 probe fails

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Message-Id: <1197856779.7782.2.camel@sli10-desk.sh.intel.com>
Date:	Mon, 17 Dec 2007 09:59:39 +0800
From:	Shaohua Li <shaohua.li@...el.com>
To:	Mike Houston <mikeserv@...s.com>
Cc:	Adrian Bunk <bunk@...sta.de>, Elvis Pranskevichus <el@...ns.net>,
	Jean Delvare <khali@...ux-fr.org>, mhoffman@...htlink.com,
	linux-kernel@...r.kernel.org, lm-sensors@...sensors.org,
	Bjorn Helgaas <bjorn.helgaas@...com>,
	Adam Belay <ambx1@....rr.com>,
	Zhao Yakui <yakui.zhao@...el.com>,
	Thomas Renninger <trenn@...e.de>, lenb@...nel.org,
	linux-acpi@...r.kernel.org
Subject: Re: [lm-sensors] 2.6.24-rc4 hwmon it87 probe fails


On Sun, 2007-12-09 at 23:02 -0500, Mike Houston wrote:
> On Mon, 10 Dec 2007 10:31:27 +0800
> Shaohua Li <shaohua.li@...el.com> wrote:
> > This should exist in previous kernel (before we remove acpi
> > motherboard driver) too. Basically it's a broken BIOS. Could below
> > patch work around it?
> > 
> > Thanks,
> > Shaohua
> > 
> > Index: linux/drivers/pnp/system.c
> > ===================================================================
> > --- linux.orig/drivers/pnp/system.c	2007-12-10
> > 10:17:46.000000000 +0800 +++ linux/drivers/pnp/system.c
> 
> Thanks Shaohua, I tested this as well and it appears to have worked
> around the issue for me.
> 
> Now, in dmesg, I get:
> 
> system 00:01: ioport range 0x290-0x29f has been reserved
> (...)
> system 00:01: ioport range 0x290-0x294 could not be reserved
> 
> In /proc/ioports I see:
> 
> 0290-029f : pnp 00:01
>   0290-0297 : it87
>     0290-0297 : it87
Unfortunately this can't solve all such issues.

Adam & Bjorn,
Could we just reserve IO ports >= 0x1000 in pnp system driver? The
purpose of the driver is to avoid resource conflict with PCI device, and
PCI device can't user io port < 0x1000.

Thanks,
Shaohua

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