linux-kernel - Re: [PATCH v2 12/29] venus: add common capability parser

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Date:   Mon, 2 Jul 2018 12:59:07 +0300
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     Tomasz Figa <tfiga@...omium.org>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        vgarodia@...eaurora.org
Subject: Re: [PATCH v2 12/29] venus: add common capability parser

Hi Tomasz,

On 07/02/2018 12:23 PM, Tomasz Figa wrote:
> On Thu, May 31, 2018 at 4:06 PM Tomasz Figa <tfiga@...omium.org> wrote:
>>
>> On Thu, May 31, 2018 at 1:21 AM Stanimir Varbanov
>> <stanimir.varbanov@...aro.org> wrote:
>>>
>>> Hi Tomasz,
>>>
>>> On 05/24/2018 05:16 PM, Tomasz Figa wrote:
>>>> Hi Stanimir,
>>>>
>>>> On Tue, May 15, 2018 at 5:08 PM Stanimir Varbanov <
> [snip]
>>>>
>>>>> +                       break;
>>>>> +               }
>>>>> +
>>>>> +               word++;
>>>>> +               words_count--;
>>>>
>>>> If data is at |word + 1|, shouldn’t we increment |word| by |1 + |data
>>>> size||?
>>>
>>> yes, that could be possible but the firmware packets are with variable
>>> data length and don't want to make the code so complex.
>>>
>>> The idea is to search for HFI_PROPERTY_PARAM* key numbers. Yes it is not
>>> optimal but this enumeration is happen only once during driver probe.
>>>
>>
>> Hmm, do we have a guarantee that we will never find a value that
>> matches HFI_PROPERTY_PARAM*, but would be actually just some data
>> inside the payload?
> 
> Ping?

OK, you are right there is guarantee that we not mixing keywords and
data. I can make parse_* functions to return how words they consumed and
increment 'word' pointer with consumed words.

-- 
regards,
Stan