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SubjectRe: [PATCH 08/17] gpiolib: cdev: use blocking notifier call chain instead of atomic
On Wed, Jul 8, 2020 at 6:19 AM Kent Gibson <> 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 <>

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.


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