diff options
| author | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-10-18 11:10:15 +0200 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-10-22 08:59:09 +0200 |
| commit | fcc8b637c542d1a0c19e5797ad72f9258e10464c (patch) | |
| tree | 6af53843e4b495dcbf5347fd078269ccc8066745 | |
| parent | 40b7c49950bd56c984b1f6722f865b922879260e (diff) | |
gpiolib: switch the line state notifier to atomic
With everything else ready, we can now switch to using the atomic
notifier for line state events which will allow us to notify user-space
about direction changes from atomic context.
Reviewed-by: Kent Gibson <warthog618@gmail.com>
Link: https://lore.kernel.org/r/20241018-gpio-notify-in-kernel-events-v5-7-c79135e58a1c@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
| -rw-r--r-- | drivers/gpio/gpiolib-cdev.c | 12 | ||||
| -rw-r--r-- | drivers/gpio/gpiolib.c | 6 | ||||
| -rw-r--r-- | drivers/gpio/gpiolib.h | 2 |
3 files changed, 10 insertions, 10 deletions
diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c index 7759dca92f8b..cb4fb55e2696 100644 --- a/drivers/gpio/gpiolib-cdev.c +++ b/drivers/gpio/gpiolib-cdev.c @@ -2729,8 +2729,8 @@ static int gpio_chrdev_open(struct inode *inode, struct file *file) cdev->gdev = gpio_device_get(gdev); cdev->lineinfo_changed_nb.notifier_call = lineinfo_changed_notify; - ret = blocking_notifier_chain_register(&gdev->line_state_notifier, - &cdev->lineinfo_changed_nb); + ret = atomic_notifier_chain_register(&gdev->line_state_notifier, + &cdev->lineinfo_changed_nb); if (ret) goto out_free_bitmap; @@ -2754,8 +2754,8 @@ out_unregister_device_notifier: blocking_notifier_chain_unregister(&gdev->device_notifier, &cdev->device_unregistered_nb); out_unregister_line_notifier: - blocking_notifier_chain_unregister(&gdev->line_state_notifier, - &cdev->lineinfo_changed_nb); + atomic_notifier_chain_unregister(&gdev->line_state_notifier, + &cdev->lineinfo_changed_nb); out_free_bitmap: gpio_device_put(gdev); bitmap_free(cdev->watched_lines); @@ -2779,8 +2779,8 @@ static int gpio_chrdev_release(struct inode *inode, struct file *file) blocking_notifier_chain_unregister(&gdev->device_notifier, &cdev->device_unregistered_nb); - blocking_notifier_chain_unregister(&gdev->line_state_notifier, - &cdev->lineinfo_changed_nb); + atomic_notifier_chain_unregister(&gdev->line_state_notifier, + &cdev->lineinfo_changed_nb); bitmap_free(cdev->watched_lines); gpio_device_put(gdev); kfree(cdev); diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 807bee86afd5..83e85dbfdeed 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1026,7 +1026,7 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data, } } - BLOCKING_INIT_NOTIFIER_HEAD(&gdev->line_state_notifier); + ATOMIC_INIT_NOTIFIER_HEAD(&gdev->line_state_notifier); BLOCKING_INIT_NOTIFIER_HEAD(&gdev->device_notifier); ret = init_srcu_struct(&gdev->srcu); @@ -4098,8 +4098,8 @@ EXPORT_SYMBOL_GPL(gpiod_set_array_value_cansleep); void gpiod_line_state_notify(struct gpio_desc *desc, unsigned long action) { - blocking_notifier_call_chain(&desc->gdev->line_state_notifier, - action, desc); + atomic_notifier_call_chain(&desc->gdev->line_state_notifier, + action, desc); } /** diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index 8737e1641278..a54be597d21a 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -72,7 +72,7 @@ struct gpio_device { const char *label; void *data; struct list_head list; - struct blocking_notifier_head line_state_notifier; + struct atomic_notifier_head line_state_notifier; struct workqueue_struct *line_state_wq; struct blocking_notifier_head device_notifier; struct srcu_struct srcu; |