gpio: cdev: wake up chardev poll() on device unbind

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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.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Kent Gibson <warthog618@gmail.com>

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Bartosz Golaszewski 2023-08-17 14:42:24 +02:00

parent a067419ba7

commit d2e2586a32

1 changed files with 27 additions and 2 deletions

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29

drivers/gpio/gpiolib-cdev.c

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