From: Hans de Goede <hansg@kernel.org>
Date: Sun, 31 Aug 2025 10:48:21 +0000 (+0200)
Subject: iio: consumers: Fix offset handling in iio_convert_raw_to_processed()
X-Git-Tag: v6.18-rc1~74^2~7^2~42
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=33f5c69c4daff39c010b3ea6da8ebab285f4277b;p=thirdparty%2Fkernel%2Fstable.git

iio: consumers: Fix offset handling in iio_convert_raw_to_processed()

Fix iio_convert_raw_to_processed() offset handling for channels without
a scale attribute.

The offset has been applied to the raw64 value not to the original raw
value. Use the raw64 value so that the offset is taken into account.

Fixes: 14b457fdde38 ("iio: inkern: apply consumer scale when no channel scale is available")
Cc: Liam Beguin <liambeguin@gmail.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Hans de Goede <hansg@kernel.org>
Link: https://patch.msgid.link/20250831104825.15097-3-hansg@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---

diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index d36a80a7b8a93..642beb4b3360d 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -640,7 +640,7 @@ static int iio_convert_raw_to_processed_unlocked(struct iio_channel *chan,
 		 * If no channel scaling is available apply consumer scale to
 		 * raw value and return.
 		 */
-		*processed = raw * scale;
+		*processed = raw64 * scale;
 		return 0;
 	}