Re: [PATCH 08/17] gpiolib: cdev: use blocking notifier call chain instead of atomic

[Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>]

On Wed, Jul 8, 2020 at 6:19 AM Kent Gibson <warthog618@xxxxxxxxx> wrote:
>
> Replace usage of atomic_notifier_call_chain with
> blocking_notifier_call_chain as the notifier function,
> lineinfo_changed_notify, calls gpio_desc_to_lineinfo,
> which calls pinctrl_gpio_can_use_line, which can sleep.
>
> The chain isn't being called from an atomic context so the
> the blocking notifier is a suitable substitute.
>
> Signed-off-by: Kent Gibson <warthog618@xxxxxxxxx>

In the back of my mind I still think I chose atomic notifiers for a
reason but I can't remember it now. Anyway, we can apply it and see if
anything bad happens and potentially just revert it.

Bart