Re: [PATCH v2] gpiolib: sysfs: Fix error handling on failed export

[Börge Strümpfel]

Hello Andy

Thanks again for your feedback.

On Tue, Nov 28, 2023 at 5:29 PM Andy Shevchenko <andy@xxxxxxxxxx> wrote:
>
> On Tue, Nov 28, 2023 at 03:13:21PM +0100, Boerge Struempfel wrote:
> > If gpio_set_transitory() fails, we should free the gpio again. Most
>
> gpio --> GPIO descriptor
> (I already mentioned capitalization in v1 review)
>

I'm sorry, I misunderstood your comment "GPIO" in the v1 review. I fixed it for
the next version.

> > notably, the flag FLAG_REQUESTED has previously been set in
> > gpiod_request_commit(), and should be reset on failure.
> >
> > To my knowledge, this does not affect any current users, since the
> > gpio_set_transitory() mainly returns 0 and -ENOTSUPP, which is converted
> > to 0. However the gpio_set_transitory() function calles the .set_config()
> > function of the corresponding gpio chip and there are some gpio drivers in
>
> gpio --> GPIO
>

thanks

> > which some (unlikely) branches return other values like -EPROBE_DEFER,
> > and EINVAL. In these cases, the above mentioned FLAG_REQUESTED would not
>
> -EINVAL
>

thanks, I missed that, when I added the minus to all the other Error codes.

> > be reset, which results in the pin being blocked until the next reboot.
>
> Fixes tag?
> (`git log --no-merges --grep "Fixes:" will show you examples)
>

I thought it was optional. But I have added it for the next version.

> --
> With Best Regards,
> Andy Shevchenko
>
>