Re: [PATCH 1/3] gpio: mockup: fix indicated direction

[Bartosz Golaszewski <brgl@xxxxxxxx>]

czw., 8 lis 2018 o 21:35 Uwe Kleine-König
<u.kleine-koenig@xxxxxxxxxxxxxx> napisał(a):
>
> Hello Bartosz,
>
> On Thu, Nov 08, 2018 at 05:52:53PM +0100, Bartosz Golaszewski wrote:
> > Commit 3edfb7bd76bd ("gpiolib: Show correct direction from the
> > beginning") fixed an existing issue but broke libgpiod tests by
> > changing the default direction of dummy lines to output.
>
> The indicated commit only changed what was shown in debugfs, but didn't
> touch the actual direction of a GPIO, doesn't it? If someone called
> gpiod_get_direction before it would have returned "output", too, unless
> I miss something.
>

This commit (3edfb7bd76bd) sets the correct direction of the line by
actually calling get_direction() instead of assuming input if
direction_input is not NULL. It just so happened that previously the
default direction of gpio-mockup lines was output but it would be
displayed as input due to this inconsistency.

My commit fixes it by simply setting the value of GPIO_MOCKUP_DIR_IN
to 0 so that when we kzalloc the line structure, we'll get the right
direction automatically.

Bart