linux-kernel - Re: [PATCH v4 14/26] staging: iio: tsl2583: updated code comment to match what the code does

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Date:   Sun, 13 Nov 2016 12:18:30 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Brian Masney <masneyb@...tation.org>, linux-iio@...r.kernel.org
Cc:     devel@...verdev.osuosl.org, gregkh@...uxfoundation.org,
        lars@...afoo.de, pmeerw@...erw.net, knaack.h@....de,
        linux-kernel@...r.kernel.org, Jon.Brenner@....com
Subject: Re: [PATCH v4 14/26] staging: iio: tsl2583: updated code comment to
 match what the code does

On 12/11/16 18:19, Brian Masney wrote:
> If channel 0 does not have any data, then the code sets the lux to zero.
> The corresponding comment says that the last value is returned. This
> updates the comment to correctly reflect what the code does. It also
> clarifies the comment about why 0 is returned.
> 
> Signed-off-by: Brian Masney <masneyb@...tation.org>
Applied.
> ---
>  drivers/staging/iio/light/tsl2583.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/iio/light/tsl2583.c b/drivers/staging/iio/light/tsl2583.c
> index 52a39a6..dbb7f6a 100644
> --- a/drivers/staging/iio/light/tsl2583.c
> +++ b/drivers/staging/iio/light/tsl2583.c
> @@ -221,7 +221,11 @@ static int tsl2583_get_lux(struct iio_dev *indio_dev)
>  		goto return_max;
>  
>  	if (!ch0) {
> -		/* have no data, so return LAST VALUE */
> +		/*
> +		 * The sensor appears to be in total darkness so set the
> +		 * calculated lux to 0 and return early to avoid a division by
> +		 * zero below when calculating the ratio.
> +		 */
>  		ret = 0;
>  		chip->als_cur_info.lux = 0;
>  		goto done;
>