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iio: iio: Fix iio_channel_read return if channel havn't info 

When xilinx-xadc is used with hwmon driver to read voltage, offset used
for temperature is always applied whatever the channel.

iio_channel_read must return an error to avoid offset for channel
without IIO_CHAN_INFO_OFFSET property.

Signed-off-by: Fabien Proriol <fabien.proriol@jdsu.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Fabien Proriol 2015-01-01 12:46:48 +00:00 committed by Jonathan Cameron
parent 2eacc608b3
commit 65de7654d3
1 changed files with 3 additions and 0 deletions
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3
drivers/iio/inkern.c
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@ -426,6 +426,9 @@ static int iio_channel_read(struct iio_channel *chan, int *val, int *val2,
if (val2 == NULL)
val2 = &unused;
if(!iio_channel_has_info(chan->channel, info))
return -EINVAL;
if (chan->indio_dev->info->read_raw_multi) {
ret = chan->indio_dev->info->read_raw_multi(chan->indio_dev,
chan->channel, INDIO_MAX_RAW_ELEMENTS,