linux-kernel - [PATCH] iio: chemical: bme680: Fix uninitialized variable in __bme680_read

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Message-ID: <4addb68c-853a-49fc-8d40-739e78db5fa1@stanley.mountain>
Date: Wed, 8 Jan 2025 12:37:22 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Vasileios Amoiridis <vassilisamir@...il.com>
Cc: Jonathan Cameron <jic23@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>, linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH] iio: chemical: bme680: Fix uninitialized variable in
 __bme680_read_raw()

The bme680_read_temp() function takes a pointer to s16 but we're passing
an int pointer to it.  This will not work on big endian systems and it
also means that the other 16 bits are uninitialized.

Pass an s16 type variable.

Fixes: f51171ce2236 ("iio: chemical: bme680: Add SCALE and RAW channels")
Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
---
 drivers/iio/chemical/bme680_core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/chemical/bme680_core.c b/drivers/iio/chemical/bme680_core.c
index 26eb0fa77a43..9d73fd2cf52c 100644
--- a/drivers/iio/chemical/bme680_core.c
+++ b/drivers/iio/chemical/bme680_core.c
@@ -879,11 +879,11 @@ static int __bme680_read_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_RAW:
 		switch (chan->type) {
 		case IIO_TEMP:
-			ret = bme680_read_temp(data, (s16 *)&chan_val);
+			ret = bme680_read_temp(data, &temp_chan_val);
 			if (ret)
 				return ret;
 
-			*val = chan_val;
+			*val = temp_chan_val;
 			return IIO_VAL_INT;
 		case IIO_PRESSURE:
 			ret = bme680_read_press(data, &chan_val);
-- 
2.45.2