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

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