Re: [PATCH v3 2/2] i2c: change id to let i2c-at91 work

[Bo Shen <voice.shen-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>]

Hi J,

On 10/16/2012 16:39, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 11:13 Tue 16 Oct     , Bo Shen wrote:
>> Hi J,
>>
>> On 10/15/2012 23:02, Jean-Christophe PLAGNIOL-VILLARD wrote:
>>> On 17:30 Mon 15 Oct     , Bo Shen wrote:
>>>> The i2c core driver will turn the platform device ID to busnum
>>>> When using platfrom device ID as -1, it means dynamically assigned
>>>> the busnum. When writing code, we need to make sure the busnum,
>>>> and call i2c_register_board_info(int busnum, ...) to register device
>>>> if using -1, we do not know the value of busnum
>>>> 	
>>>> In order to solve this issue, set the platform device ID as a fix number
>>>> Here using 0 to match the busnum used in i2c_regsiter_board_info()
>>>>
>>>> Signed-off-by: Bo Shen <voice.shen-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
>>>> ---
>>>
>>> can you check when this append for the first time to schedule a patch for stable too
>>
>> OK. I will resend it and add linux stable into the cc list.
> no this not how it work
>
> I ask you to check which patch add the regression and then when this is
> applied in the kernel we will request greg to apply it too to the stable

The code is using id = -1 appear 4 years ago. And after dig, I don't 
find which patch cause this the regression.

Sorry for that.

> But before do that you MUST foudn the commit responsible
>
> Best Regards,
> J.
>