Re: [libgpiod v2][PATCH] misc: make gpiod_is_gpiochip_device() not set errno

[Kent Gibson <warthog618@xxxxxxxxx>]

On Fri, Jul 01, 2022 at 01:00:56PM +0200, Bartosz Golaszewski wrote:
> This function should just report whether the file indicated by path is
> a GPIO chip or not. Let's rework it to not set errno. Failure to open a
> chip should still report errro numbers like before.
> 

This is will break my tool patch, for sure.
My gpiodetect uses the errno behaviour to give a clue as to why a chip
might not be available to a user, and that work was already done in
gpiod_is_gpiochip_device().
There might be other places the errno was propagated as well, but
whatever, I'll sort something out.

Cheers,
Kent.