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| author | Colin Ian King <colin.king@canonical.com> | 2018-05-30 21:19:36 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2018-06-24 16:22:38 +0300 |
| commit | 288320f6e9a254bb595b4783c9bdfcc7c0e73153 (patch) | |
| tree | 76656df47366ae35d3d2ded240033c08c27457f7 /drivers/iio/light/tsl2772.c | |
| parent | 13399ff25f179811ce9c1df1523eb39f9e4a4772 (diff) | |
| download | linux-288320f6e9a254bb595b4783c9bdfcc7c0e73153.tar.xz | |
iio: tsl2x7x/tsl2772: avoid potential division by zero
It may be possible for tsl2772_get_lux to return a zero lux value
and hence a division by zero can occur when lux_val is zero. Check
for this case and return -ERANGE to avoid the division by zero.
Detected by CoverityScan, CID#1469484 ("Division or modulo by zero")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/light/tsl2772.c')
| -rw-r--r-- | drivers/iio/light/tsl2772.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/iio/light/tsl2772.c b/drivers/iio/light/tsl2772.c index 34d42a2504c9..df5b2a0da96c 100644 --- a/drivers/iio/light/tsl2772.c +++ b/drivers/iio/light/tsl2772.c @@ -582,6 +582,8 @@ static int tsl2772_als_calibrate(struct iio_dev *indio_dev) "%s: failed to get lux\n", __func__); return lux_val; } + if (lux_val == 0) + return -ERANGE; ret = (chip->settings.als_cal_target * chip->settings.als_gain_trim) / lux_val; |