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iio: imu: adis16480: make sure provided frequency is positive 

It could happen that either `val` or `val2` [provided from userspace] is
negative. In that case the computed frequency could get a weird value.

Fix this by checking that neither of the 2 variables is negative, and check
that the computed result is not-zero.

Fixes: e4f9593901 ("iio: imu: adis16480 switch sampling frequency attr to core support")
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Alexandru Ardelean 2019-10-08 17:15:37 +03:00 committed by Jonathan Cameron
parent 3f3d31622a
commit 24e1eb5c0d
1 changed files with 4 additions and 1 deletions
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5
drivers/iio/imu/adis16480.c
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@ -317,8 +317,11 @@ static int adis16480_set_freq(struct iio_dev *indio_dev, int val, int val2)
struct adis16480 *st = iio_priv(indio_dev);
unsigned int t, reg;
if (val < 0 || val2 < 0)
return -EINVAL;
t = val * 1000 + val2 / 1000;
if (t <= 0)
if (t == 0)
return -EINVAL;
/*