From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Zeev Tarantov <zeev.tarantov@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [BUG] [hwmon] linux 2.6.31-rc6 regression
Date: Sun, 16 Aug 2009 02:03:03 +0100 [thread overview]
Message-ID: <20090816010303.GA9588@srcf.ucam.org> (raw)
In-Reply-To: <12d7e64c0908150329k1bf123der18e74112c5b9cd97@mail.gmail.com>
On Sat, Aug 15, 2009 at 01:29:48PM +0300, Zeev Tarantov wrote:
> [ 3.276720] w83627ehf: Found W83627DHG chip at 0x290
> [ 3.276894] ACPI: I/O resource w83627ehf [0x295-0x296] conflicts
> with ACPI region HWRE [0x290-0x299]
> [ 3.277171] ACPI: Device needs an ACPI driver
The hwmon driver is attempting to allocate a region that's also used by
your ACPI firmware. There's no way to synchronise access between the
kernel and the firmware, so allowing both is potentially racy - we've
seen numerous cases where the combination results in the system
incorrectly generating critical temperatuer shutdowns, for instance,
when some other indexed access gets interpreted as the temperature or
when the hwmon chip's state machine is confused. The failure of hwmon to
bind is a feature here, not a bug. You can override it with
acpi_enforce_resources=no on the kernel command line.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2009-08-16 1:03 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-15 10:29 [BUG] [hwmon] linux 2.6.31-rc6 regression Zeev Tarantov
2009-08-15 10:43 ` Markus Trippelsdorf
2009-08-16 1:03 ` Matthew Garrett [this message]
2009-08-16 5:37 ` Markus Trippelsdorf
2009-08-16 9:32 ` Matthew Garrett
2009-08-16 14:39 ` Stefan Richter
2009-08-16 14:41 ` Matthew Garrett
2009-08-16 13:38 ` Alan Cox
2009-08-16 14:28 ` Calvin Walton
2009-08-16 15:24 ` Markus Trippelsdorf
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20090816010303.GA9588@srcf.ucam.org \
--to=mjg59@srcf.ucam.org \
--cc=linux-kernel@vger.kernel.org \
--cc=zeev.tarantov@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox