Re: [PATCH v6 3/3] memory: mtk-smi: mt8188: Use devm_pm_runtime_enable

[Krzysztof Kozlowski]

On 09/04/2025 10:26, AngeloGioacchino Del Regno wrote:
> Il 08/04/25 08:29, Krzysztof Kozlowski ha scritto:
>> On Tue, Apr 08, 2025 at 11:31:56AM GMT, Friday Yang wrote:
>>> Replace pm_runtime_enable with the devres-enabled version which
>>> can trigger pm_runtime_disable.
>>>
>>> Signed-off-by: Friday Yang <friday.yang@xxxxxxxxxxxx>
>>> ---
>>>   drivers/memory/mtk-smi.c | 16 +++++++++-------
>>>   1 file changed, 9 insertions(+), 7 deletions(-)
>>>
>>> diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
>>> index f25d46d2ef33..daef6d350419 100644
>>> --- a/drivers/memory/mtk-smi.c
>>> +++ b/drivers/memory/mtk-smi.c
>>> @@ -713,16 +713,17 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
>>>   	if (ret)
>>>   		goto err_link_remove;
>>>
>>> -	pm_runtime_enable(dev);
>>> +	ret = devm_pm_runtime_enable(dev);
>>> +	if (ret)
>>> +		goto err_link_remove;
>>> +
>>>   	platform_set_drvdata(pdev, larb);
>>>   	ret = component_add(dev, &mtk_smi_larb_component_ops);
>>>   	if (ret)
>>> -		goto err_pm_disable;
>>> +		goto err_link_remove;
>>>
>>>   	return 0;
>>>
>>> -err_pm_disable:
>>> -	pm_runtime_disable(dev);
>>
>> You now broke/changed the order of cleanup without any explanation.
>>
>> Best regards,
>> Krzysztof
>>
> 
> I agree some comment in the commit description saying that the cleanup reordering
> doesn't matter in this specific case would've been nice to have, but anyway IMO
> it's not a big deal - he didn't break anything, anyway :-)

Cleanup orderings are tricky, so are you sure nothing got here called in
incorrect moment? I see that runtime PM will be disabled much later and
what certainty you have that device won't get resumed that time?

Best regards,
Krzysztof