Re: [Xenomai] imx28 rtcan flexcan system freezes

[Alexandre COFFIGNAL <acoffignal@geral.com>]

Le 22/01/2014 13:00, Gilles Chanteperdrix a écrit :
> On 01/22/2014 12:36 PM, Alexandre COFFIGNAL wrote:
>>>> +        cf->data[3]=((data0 >> 0)  & 0xFF) ;
>>>> +        cf->data[2]=((data0 >> 8)  & 0xFF) ;
>>>> +        cf->data[1]=((data0 >> 16)  & 0xFF) ;
>>>> +        cf->data[0]=((data0 >> 24)  & 0xFF) ;
>>>> +        cf->data[7]=((data1 >> 0)  & 0xFF) ;
>>>> +        cf->data[6]=((data1 >> 8)  & 0xFF) ;
>>>> +        cf->data[5]=((data1 >> 16)  & 0xFF) ;
>>>> +        cf->data[4]=((data1 >> 24)  & 0xFF) ;
>>>>
>>>> rtcan flexcan works perfectly.
>>>> is  anyone know what is the problem with first instructions ?
>>> Probably mb->data does not have the right alignment. Could you not
>>> arrange to get it properly aligned? Failing that, you should use
>>> put_unaligned instead of open coding it.
>>>
>>>
>> here structures used in flexcan driver, it seem to be aligned
>
> I am talking about the alignment of cf->data, since obviously, that is 
> the one which is causing problems.
>
>
Thank a lot, put_unaligned fix this issue if you want, i can send a path
--