From 043c1da79472d7b030a4f7df40e2889e15c979a5 Mon Sep 17 00:00:00 2001 From: Brian Masney Date: Sat, 12 Nov 2016 13:19:29 -0500 Subject: [PATCH] staging: iio: tsl2583: updated code comment to match what the code does 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 Signed-off-by: Jonathan Cameron --- 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 abd0663f9691..e11820e8c710 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; -- 2.39.5