Re: [PATCH 05/10] iio: imu: adis: create an unlocked version of adis_reset()

[Jonathan Cameron <jic23@kernel.org>]

On Thu, 26 Sep 2019 14:18:07 +0300
Alexandru Ardelean <alexandru.ardelean@analog.com> wrote:

> The reset routine may also be important to be protected by the state-lock
> and grouped with other operations, so create an unlocked version, so that
> this can be done.
> 
> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Applied
> ---
>  drivers/iio/imu/adis.c       |  8 ++++----
>  include/linux/iio/imu/adis.h | 19 ++++++++++++++++++-
>  2 files changed, 22 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/iio/imu/adis.c b/drivers/iio/imu/adis.c
> index e461b9ae22a5..b14101bf34b9 100644
> --- a/drivers/iio/imu/adis.c
> +++ b/drivers/iio/imu/adis.c
> @@ -309,23 +309,23 @@ int __adis_check_status(struct adis *adis)
>  EXPORT_SYMBOL_GPL(__adis_check_status);
>  
>  /**
> - * adis_reset() - Reset the device
> + * __adis_reset() - Reset the device (unlocked version)
>   * @adis: The adis device
>   *
>   * Returns 0 on success, a negative error code otherwise
>   */
> -int adis_reset(struct adis *adis)
> +int __adis_reset(struct adis *adis)
>  {
>  	int ret;
>  
> -	ret = adis_write_reg_8(adis, adis->data->glob_cmd_reg,
> +	ret = __adis_write_reg_8(adis, adis->data->glob_cmd_reg,
>  			ADIS_GLOB_CMD_SW_RESET);
>  	if (ret)
>  		dev_err(&adis->spi->dev, "Failed to reset device: %d\n", ret);
>  
>  	return ret;
>  }
> -EXPORT_SYMBOL_GPL(adis_reset);
> +EXPORT_SYMBOL_GPL(__adis_reset);
>  
>  static int adis_self_test(struct adis *adis)
>  {
> diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h
> index f4ffba0c36b1..966af241710f 100644
> --- a/include/linux/iio/imu/adis.h
> +++ b/include/linux/iio/imu/adis.h
> @@ -73,7 +73,24 @@ struct adis {
>  
>  int adis_init(struct adis *adis, struct iio_dev *indio_dev,
>  	struct spi_device *spi, const struct adis_data *data);
> -int adis_reset(struct adis *adis);
> +int __adis_reset(struct adis *adis);
> +
> +/**
> + * adis_reset() - Reset the device
> + * @adis: The adis device
> + *
> + * Returns 0 on success, a negative error code otherwise
> + */
> +static inline int adis_reset(struct adis *adis)
> +{
> +	int ret;
> +
> +	mutex_lock(&adis->state_lock);
> +	ret = __adis_reset(adis);
> +	mutex_unlock(&adis->state_lock);
> +
> +	return ret;
> +}
>  
>  int __adis_write_reg(struct adis *adis, unsigned int reg,
>  	unsigned int val, unsigned int size);