On 04/09/2024 06:42, Dmitry Torokhov wrote:
> Using guard notation makes the code more compact and error handling
> more robust by ensuring that locks are released in all code paths
> when control leaves critical section.
>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> ---
> drivers/input/misc/da7280.c | 26 ++++++++++++--------------
> 1 file changed, 12 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/input/misc/da7280.c b/drivers/input/misc/da7280.c
> index 1629b7ea4cbd..e4a605c6af15 100644
> --- a/drivers/input/misc/da7280.c
> +++ b/drivers/input/misc/da7280.c
> @@ -1263,39 +1263,37 @@ static int da7280_suspend(struct device *dev)
> {
> struct da7280_haptic *haptics = dev_get_drvdata(dev);
>
> - mutex_lock(&haptics->input_dev->mutex);
> + guard(mutex)(&haptics->input_dev->mutex);
>
> /*
> * Make sure no new requests will be submitted while device is
> * suspended.
> */
> - spin_lock_irq(&haptics->input_dev->event_lock);
> - haptics->suspended = true;
> - spin_unlock_irq(&haptics->input_dev->event_lock);
> + scoped_guard(spinlock_irq, &haptics->input_dev->event_lock) {
> + haptics->suspended = true;
> + }
>
> da7280_haptic_stop(haptics);
>
> - mutex_unlock(&haptics->input_dev->mutex);
> -
> return 0;
> }
>
> static int da7280_resume(struct device *dev)
> {
> struct da7280_haptic *haptics = dev_get_drvdata(dev);
> - int retval;
> + int error;
>
> - mutex_lock(&haptics->input_dev->mutex);
> + guard(mutex)(&haptics->input_dev->mutex);
>
> - retval = da7280_haptic_start(haptics);
> - if (!retval) {
> - spin_lock_irq(&haptics->input_dev->event_lock);
> + error = da7280_haptic_start(haptics);
> + if (error)
> + return error;
> +
> + scoped_guard(spinlock_irq, &haptics->input_dev->event_lock) {
> haptics->suspended = false;
> - spin_unlock_irq(&haptics->input_dev->event_lock);
> }
>
> - mutex_unlock(&haptics->input_dev->mutex);
> - return retval;
> + return 0;
> }
>
> #ifdef CONFIG_OF
Reviewed-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>