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iio:ad7923: Return error if we didn't get the expected result

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Instead of leaving 'val' uninitialized return an error if the result's address
did not match that of the channel we were trying to read.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: Patrick Vasseur <patrick.vasseur@c-s.fr>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2013-03-04 19:30:00 +00:00 committed by Jonathan Cameron
parent 6c23811ecb
commit 135f06465d
1 changed files with 2 additions and 0 deletions
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2
drivers/iio/adc/ad7923.c
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@ -199,6 +199,8 @@ static int ad7923_read_raw(struct iio_dev *indio_dev,
if (chan->address == EXTRACT(ret, 12, 4))
*val = EXTRACT(ret, 0, 12);
else
return -EIO;
return IIO_VAL_INT;
}