Re: [PATCH v4 01/26] staging: iio: tsl2583: check if chip is in a working state in in_illuminance_calibrate_store

[Jonathan Cameron <jic23@kernel.org>]

On 12/11/16 18:19, Brian Masney wrote:
> in_illuminance_calibrate_store() did not check to see if the chip is
> in a working state. This patch adds the proper check. The return value
> from taos_als_calibrate() was also not checked in this function, so the
> proper check was also added while changes are being made here.
> 
> Signed-off-by: Brian Masney <masneyb@onstation.org>
Applied
> ---
>  drivers/staging/iio/light/tsl2583.c | 17 ++++++++++++++---
>  1 file changed, 14 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/staging/iio/light/tsl2583.c b/drivers/staging/iio/light/tsl2583.c
> index 1a7be12..de54e74 100644
> --- a/drivers/staging/iio/light/tsl2583.c
> +++ b/drivers/staging/iio/light/tsl2583.c
> @@ -501,16 +501,27 @@ static ssize_t in_illuminance_calibrate_store(struct device *dev,
>  {
>  	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
>  	struct tsl2583_chip *chip = iio_priv(indio_dev);
> -	int value;
> +	int value, ret;
>  
>  	if (kstrtoint(buf, 0, &value) || value != 1)
>  		return -EINVAL;
>  
>  	mutex_lock(&chip->als_mutex);
> -	taos_als_calibrate(indio_dev);
> +
> +	if (chip->taos_chip_status != TSL258X_CHIP_WORKING) {
> +		ret = -EBUSY;
> +		goto done;
> +	}
> +
> +	ret = taos_als_calibrate(indio_dev);
> +	if (ret < 0)
> +		goto done;
> +
> +	ret = len;
> +done:
>  	mutex_unlock(&chip->als_mutex);
>  
> -	return len;
> +	return ret;
>  }
>  
>  static ssize_t in_illuminance_lux_table_show(struct device *dev,
>