linux-kernel - [PATCH] iio: inkern: fix iio_convert_raw_to_processed

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Date:	Mon,  1 Jul 2013 18:40:09 +0200
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Jonathan Cameron <jic23@....ac.uk>
Cc:	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	Lars-Peter Clausen <lars@...afoo.de>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	<stable@...r.kernel.org>
Subject: [PATCH] iio: inkern: fix iio_convert_raw_to_processed_unlocked

When reading IIO_CHAN_INFO_OFFSET, the return value of iio_channel_read() for
success will be IIO_VAL*, checking for 0 is not correct.

Cc: <stable@...r.kernel.org> # 3.10.x
Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
---
 drivers/iio/inkern.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index 98ddc32..0cf5f8e 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -451,7 +451,7 @@ static int iio_convert_raw_to_processed_unlocked(struct iio_channel *chan,
 	int ret;
 
 	ret = iio_channel_read(chan, &offset, NULL, IIO_CHAN_INFO_OFFSET);
-	if (ret == 0)
+	if (ret >= 0)
 		raw64 += offset;
 
 	scale_type = iio_channel_read(chan, &scale_val, &scale_val2,
-- 
1.8.1.2

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