Re: [PATCH v2 4/6] gpio: cdev: wake up chardev poll() on device unbind

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

On Thu, Aug 17, 2023 at 08:49:56PM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
> 
> Add a notifier block to the gpio_chardev_data structure and register it
> with the gpio_device's device notifier. Upon reception of an event, wake
> up the wait queue so that the user-space be forced out of poll() and need
> to go into a new system call which will then fail due to the chip being
> gone.

...

> +	struct gpio_chardev_data *cdev = container_of(nb,
> +						      struct gpio_chardev_data,
> +						      device_unregistered_nb);

	struct gpio_chardev_data *cdev =
		container_of(nb, struct gpio_chardev_data, device_unregistered_nb);

?

-- 
With Best Regards,
Andy Shevchenko