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

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Message-Id: <20071209144004.ac36aad1.mikeserv@bmts.com>
Date:	Sun, 9 Dec 2007 14:40:04 -0500
From:	Mike Houston <mikeserv@...s.com>
To:	Jean Delvare <khali@...ux-fr.org>
Cc:	Adrian Bunk <bunk@...sta.de>, mhoffman@...htlink.com,
	linux-kernel@...r.kernel.org, lm-sensors@...sensors.org,
	Bjorn Helgaas <bjorn.helgaas@...com>,
	Adam Belay <ambx1@....rr.com>
Subject: Re: [lm-sensors] 2.6.24-rc4 hwmon it87 probe fails

On Sun, 9 Dec 2007 10:50:28 +0100
Jean Delvare <khali@...ux-fr.org> wrote:

> This one shows:
> 
> system 00:01: ioport range 0x290-0x29f has been reserved
> (...)
> system 00:01: ioport range 0x290-0x294 has been reserved
> 
> This is clearly not correct as both areas overlap. The second
> reservation is responsible for the it87 breakage, because it
> conflicts with what the it87 driver later attempts to request
> (0x290-0x297). The first is wrong as well (the IT87xxF environment
> controller I/O area is 8 port wide, not 16) but shouldn't be a
> problem in practice.
> 
> These port reservations weren't happening in 2.6.23.9 according to
> your dmesg output for that kernel. I don't know what changed in
> this area since 2.6.23.9, maybe Bjorn or Adam (Cc'd) can tell.
> 
> Either way, the overlapping areas smell like a BIOS bug, meaning
> that you should look for an updated BIOS for your system first.
> 
> > http://www.mikeserv.com/temp/config-2.6.24-rc4.txt

Thanks for the suggestion, Jean. I flashed my bios to the latest
(F12) for my Gigabyte GA-965P-DS3 (rev. 3.3) motherboard

http://www.gigabyte.com.tw/Products/Motherboard/Products_Overview.aspx?ProductID=2456

Unfortunately, there has been no change to the situation. The same
ioport ranges are being reserved when booting with 2.6.24-rc4 and
it87 does not work. No change to the situation in 2.6.23.9 either, the
io conflict is not occuring and it87 still works there.

Mike Houston
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