Re: [PATCH v2 1/7] gpio: mockup: improve the debugfs input sanitization

[Andy Shevchenko]

On Wed, May 31, 2017 at 1:52 PM, Bartosz Golaszewski <brgl@xxxxxxxx> wrote:
> 2017-05-30 20:52 GMT+02:00 Andy Shevchenko <andy.shevchenko@xxxxxxxxx>:
>> On Tue, May 30, 2017 at 11:58 AM, Bartosz Golaszewski <brgl@xxxxxxxx> wrote:

>>> +       if (val != 0 && val != 1)
>>
>> Wouldn't be easier to have
>>
>> u8 rv;
>>
>> ret = kstrtu8_from_user();
>> if (ret >= 2)
>>  return ...;
>>
>> ?
>
> kstrtu8_from_user() doesn't return the converted value, so you won't
> skip an if anyway

Oh, yes.

> and by using the int variant, we're avoiding a cast.
> I'd prefer it this way frankly.

Fair enough. (Though I would go with (val < 0 && val > 1) condition,
of course it's matter of taste)

-- 
With Best Regards,
Andy Shevchenko