linux-kernel - Re: 2.6.29 acpi regression: acpi_ex_extract_from

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Message-ID: <49C26D91.3010904@gmail.com>
Date:	Thu, 19 Mar 2009 17:06:41 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	Lin Ming <ming.m.lin@...el.com>
CC:	robert.moore@...el.com, lenb@...nel.org,
	linux-acpi@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	torvalds@...ux-foundation.org
Subject: Re: 2.6.29 acpi regression: acpi_ex_extract_from_field -- div by
 zero

On 18.3.2009 09:08, Jiri Slaby wrote:
> On 16.3.2009 17:31, Jiri Slaby wrote:
>> On 16.3.2009 04:42, Lin Ming wrote:
>>>> sometimes, when booting up/resuming from disk, I get an oops[1].
>>>>
>>>> obj_desc->common_field.access_bit_width is zero, but even after the
>>>> loop. Division before the loop is apparently OK.
>>>
>>> Would please try below debug patch to see which region filed is
>>> accessed?
>
> I'm confused, but keep trying.

Got it again. obj_desc->common_field.node is martian too (0x4000000), so 
the added acpi_get_name dies:
http://www.fi.muni.cz/~xslaby/sklad/panics/acpi_oops1.png

Whole common_field seems to be mangled. Ideas?
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