Re: [V5 PATCH 1/2] ACPI / scan: Add support for ACPI _CLS device matching

Suravee Suthikulpanit
2015-03-25T15:11:16Z

On 3/24/15 15:20, Rafael J. Wysocki wrote:
> On Tuesday, March 24, 2015 04:43:46 PM Mika Westerberg wrote:
>> On Tue, Mar 24, 2015 at 09:23:47AM -0500, Suravee Suthikulpanit wrote:
>>> On 3/9/15 10:20, Mika Westerberg wrote:
>>>>> [....]
>>>>> diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
>>>>> index e530533..9a42522 100644
>>>>> --- a/include/linux/mod_devicetable.h
>>>>> +++ b/include/linux/mod_devicetable.h
>>>>> @@ -189,6 +189,7 @@ struct css_device_id {
>>>>> struct acpi_device_id {
>>>>> __u8 id[ACPI_ID_LEN];
>>>>> kernel_ulong_t driver_data;
>>>>> + __u32 cls;
>>>>
>>>> It would be nice if we could change ordering here but I understand that
>>>> it breaks quite many drivers. Perhaps we should consider creating
>>>> ACPI_DEVICE() macro and convert existing drivers to that at some point.
>>>
>>> Yes, a roughly grep in the drivers directory showing about 112 files at the
>>> moment. If you think this is the right approach going forward, we can work
>>> on cleaning this up on a separate patch series. Please let me know what you
>>> think.
>>
>> I think having ACPI_DEVICE() macro would be pretty useful and it avoids
>> things like this if we need to add new fields in the future. Rafael has
>> the last word, though :-)
>
> I agree.

Okay, how should I organize this big change? Can we do this as a
separate patch series?

Thanks,
Suravee