linux-kernel - Re: [PATCH v4 15/17] media: qcom: camss: Move vfe_disable into a common routine where applicable

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Message-ID: <e1ab1df4-8431-483d-8f20-74de5349cfbc@linaro.org>
Date:   Fri, 8 Sep 2023 11:36:28 +0100
From:   Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>, rfoss@...nel.org,
        todor.too@...il.com, agross@...nel.org, andersson@...nel.org,
        mchehab@...nel.org, hverkuil-cisco@...all.nl,
        laurent.pinchart@...asonboard.com, sakari.ailus@...ux.intel.com,
        andrey.konovalov@...aro.org
Cc:     linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 15/17] media: qcom: camss: Move vfe_disable into a
 common routine where applicable

On 08/09/2023 11:24, Konrad Dybcio wrote:
> On 8.09.2023 12:21, Bryan O'Donoghue wrote:
>> On 08/09/2023 11:04, Konrad Dybcio wrote:
>>> On 8.09.2023 12:02, Konrad Dybcio wrote:
>>>> On 7.09.2023 18:44, Bryan O'Donoghue wrote:
>>>>> We can move vfe_disable() into a common routine in the core VFE file
>>>>> provided we make wm_stop() a VFE specific callback.
>>>>>
>>>>> The callback is required to capture the case where VFE 17x currently isn't
>>>>> VC enabled where as VFE 480 is.
>>>>>
>>>>> Suggested-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
>>>>> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
>>>>> ---
>>>> Acked-by: Konrad Dybcio <konrad.dybcio@...aro.org>
>>>>
>>>> Konrad
>>> Actually there's
>>>
>>> ret = vfe_reset(vfe);
>>>
>>> return ret;
>>>
>>>
>>> which could just be
>>>
>>> return vfe_reset(vfe);
>>>
>>>
>>> Konrad
>>
>> On purpose.
>>
>> I prefer the ret = ; return ret; pattern since it makes it easier / less work to
>>
>> ret = fn();
>> if (ret)
>>      goto error;
>>
>> error:
>>      return ret;
> There's no error label in vfe_disable_output
> 
> Konrad

No there is not. Its a pattern I use to make adding jump labels easier 
later on.

Just like you use the pattern of appending "," to aggregate initialisation.

---
bod