On 12/11/16 18:19, Brian Masney wrote:
> The check for ch1lux > ch0lux inside tsl2583_get_lux is only valid if
> the ratio is not equal to zero. Move the code block inside the else
> statement. This does away with the need to initialize the variables to
> zero.
>
> Signed-off-by: Brian Masney <masn...@onstation.org>
Applied.
> ---
> drivers/staging/iio/light/tsl2583.c | 23 ++++++++++++-----------
> 1 file changed, 12 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/staging/iio/light/tsl2583.c
> b/drivers/staging/iio/light/tsl2583.c
> index dbb7f6a..bcdf095 100644
> --- a/drivers/staging/iio/light/tsl2583.c
> +++ b/drivers/staging/iio/light/tsl2583.c
> @@ -167,8 +167,6 @@ static int tsl2583_get_lux(struct iio_dev *indio_dev)
> struct tsl2583_lux *p;
> struct tsl2583_chip *chip = iio_priv(indio_dev);
> int i, ret;
> - u32 ch0lux = 0;
> - u32 ch1lux = 0;
>
> ret = i2c_smbus_read_byte_data(chip->client, TSL2583_CMD_REG);
> if (ret < 0) {
> @@ -242,22 +240,25 @@ static int tsl2583_get_lux(struct iio_dev *indio_dev)
> if (p->ratio == 0) {
> lux = 0;
> } else {
> + u32 ch0lux, ch1lux;
> +
> ch0lux = ((ch0 * p->ch0) +
> (gainadj[chip->als_settings.als_gain].ch0 >> 1))
> / gainadj[chip->als_settings.als_gain].ch0;
> ch1lux = ((ch1 * p->ch1) +
> (gainadj[chip->als_settings.als_gain].ch1 >> 1))
> / gainadj[chip->als_settings.als_gain].ch1;
> - lux = ch0lux - ch1lux;
> - }
>
> - /* note: lux is 31 bit max at this point */
> - if (ch1lux > ch0lux) {
> - dev_dbg(&chip->client->dev, "%s: No Data - Returning 0\n",
> - __func__);
> - ret = 0;
> - chip->als_cur_info.lux = 0;
> - goto done;
> + /* note: lux is 31 bit max at this point */
> + if (ch1lux > ch0lux) {
> + dev_dbg(&chip->client->dev, "%s: No Data - Returning
> 0\n",
> + __func__);
> + ret = 0;
> + chip->als_cur_info.lux = 0;
> + goto done;
> + }
> +
> + lux = ch0lux - ch1lux;
> }
>
> /* adjust for active time scale */
>
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