Re: [PATCH v3 5/6] platform/x86: Add intel_skl_int3472 driver

[Daniel Scally]

On 23/02/2021 12:01, Andy Shevchenko wrote:
>>>> +       if (ares->type != ACPI_RESOURCE_TYPE_GPIO ||
>>>> +           ares->data.gpio.connection_type != ACPI_RESOURCE_GPIO_TYPE_IO)
>>>> +               return 1; /* Deliberately positive so parsing continues */
>>> I don't like to lose control over ACPI_RESOURCE_TYPE_GPIO, i.e.
>>> spreading it over kernel code (yes, I know about one existing TS
>>> case).
>>> Consider to provide a helper in analogue to acpi_gpio_get_irq_resource().
>> Sure, but I probably name it acpi_gpio_is_io_resource() - a function
>> named "get" which returns a bool seems a bit funny to me.
> But don't you need the resource itself?
>
> You may extract and check resource at the same time as
> acpi_gpio_get_irq_resource() does.


Oh! Reading comprehension fail; I didn't notice it was returning the
pointer through agpio; you're right of course.

>
> ...
>
>>>> +       struct int3472_discrete_device *int3472 = platform_get_drvdata(pdev);
>>>> +       if (int3472->gpios.dev_id)
>>>> +               gpiod_remove_lookup_table(&int3472->gpios);
>>> gpiod_remove_lookup_table() is now NULL-aware.
>>> But in any case I guess you don't need the above check.
>> Sorry; forgot to call out that I didn't follow that suggestion;
>> int3472->gpios is a _struct_ rather than a pointer, so &int3472->gpios
>> won't be NULL, even if I haven't filled anything in to there yet because
>> it failed before it got to that point. So, not sure that it quite works
>> there.
> I think if you initialize the ->list member you can remove without check.


I'll give that a try - thanks

>