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staging:iio:ad2s90: Check channel type at read_raw

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This patch adds a channel type check at the beginning of the
ad2s90_read_raw function. Since ad2s90 has only one channel, it just
checks if the given channel is the expected one and if not, return
-EINVAL.

Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Matheus Tavares
2018-11-03 19:49:48 -03:00
committed by Jonathan Cameron
parent ccba40e9f7
commit addacf3b49
1 changed files with 3 additions and 0 deletions
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3
drivers/staging/iio/resolver/ad2s90.c
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@@ -34,6 +34,9 @@ static int ad2s90_read_raw(struct iio_dev *indio_dev,
int ret;
struct ad2s90_state *st = iio_priv(indio_dev);
if (chan->type != IIO_ANGL)
return -EINVAL;
switch (m) {
case IIO_CHAN_INFO_SCALE:
/* 2 * Pi / 2^12 */