From: Renato Lui Geh <renatogeh@gmail.com>
Date: Thu, 1 Nov 2018 14:43:02 +0000 (-0300)
Subject: staging: iio: ad7780: fix offset read value
X-Git-Tag: v5.4-rc1~1925^2~249^2~44
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5ccc612b835b5e1560f913ec96ed6fdc7835892e;p=platform%2Fkernel%2Flinux-rpi.git

staging: iio: ad7780: fix offset read value

Variable val subtracted an uninitialized value on IIO_CHAN_INFO_OFFSET.
This was fixed by assigning the correct value instead.

Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
Acked-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---

diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c
index b67412db0318..91e016d534ed 100644
--- a/drivers/staging/iio/adc/ad7780.c
+++ b/drivers/staging/iio/adc/ad7780.c
@@ -96,7 +96,7 @@ static int ad7780_read_raw(struct iio_dev *indio_dev,
 		*val2 = chan->scan_type.realbits - 1;
 		return IIO_VAL_FRACTIONAL_LOG2;
 	case IIO_CHAN_INFO_OFFSET:
-		*val -= (1 << (chan->scan_type.realbits - 1));
+		*val = -(1 << (chan->scan_type.realbits - 1));
 		return IIO_VAL_INT;
 	}