Re: A false alarm for recursive lock in v4l2_ctrl_add_handler

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Su Jiaquan <jiaquan.lnx@xxxxxxxxx> wrote:
>Hi Hans,
>
>On Wed, Aug 21, 2013 at 7:47 PM, Hans Verkuil <hverkuil@xxxxxxxxx>
>wrote:
>> On Wed 21 August 2013 12:56:21 Su Jiaquan wrote:
>>> Hi Hans,
>>>
>>> Recently when we enable LOCKDEP in our kernel, it detected a
>"possible
>>> recursive locking". As we check the code, we found that it's just a
>>> false alarm, the conceived scenario should never happen. Shell I
>>> submit a patch to suppress it?
>>
>> A patch went in for 3.10 that suppresses this false alarm.
>>
>> Regards,
>>
>>         Hans
>>
>
>Sorry I didn't notice the fix, Is it this one?
>
>commit 6cd247ef22e493e1884e576c066661538b031981
>Author: Andy Walls <awalls@xxxxxxxxxxxxxxxx>
>Date:   Sat Mar 9 05:55:11 2013 -0300
>
>    [media] v4l2-ctrls: eliminate lockdep false alarms for struct
>v4l2_ctrl_handler.lock


Yes.

Regards,
Andy

>Thanks!
>
>Jiaquan



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