Re: [git pull request] ACPI and driver patches for 2.6.33.merge

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Ingo Molnar wrote:
> * Shaohua Li <shaohua.li@xxxxxxxxx> wrote:
> 
>> On Fri, Dec 18, 2009 at 09:28:50AM +0800, Yinghai Lu wrote:
>>> On Wed, Dec 16, 2009 at 12:06 PM, Len Brown <lenb@xxxxxxxxxx> wrote:
>>>> Hi Linus,
>>>>
>>>> please pull from:
>>>>
>>>> git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6.git release
>>>>
>>> ;..
>>>> Shaohua Li (3):
>>>> ? ? ?ACPI: Add a generic API for _OSC -v2
>>>> ? ? ?ACPI: cleanup pci_root _OSC code.
>>>> ? ? ?ACPI: Add platform-wide _OSC support.
>>> it seems these three patches broke the _OSC on my intel new systems.
>>>
>>> revert them fix the problem with AER and pciehp and etc
>> can you give more details? I just cleaned up the _OSC code for AER and 
>> pciehp, no function changes.
> 
> Famous last words ;-)
> 
> Yinghai, i suspect Shaohua needs the kind of info you'd need if you tried to 
> fix it: acpidump, before/after debug boot log, a description of what goes bad, 
> etc.

the so called clean up, change the ret length checking.

-       if (!output.length)
-               return AE_NULL_OBJECT;
-

+       /* return buffer should have the same length as cap buffer */
+       if (context->ret.length != context->cap.length)
+               return AE_NULL_OBJECT;

YH
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