linux-kernel - [PATCH v1 1/2] iio: adc: ad4000: Check for error code from devm_mutex

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Message-ID: <20241030162013.2100253-2-andriy.shevchenko@linux.intel.com>
Date: Wed, 30 Oct 2024 18:19:18 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Marcelo Schmitt <marcelo.schmitt@...log.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Matteo Martelli <matteomartelli3@...il.com>,
	linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Lars-Peter Clausen <lars@...afoo.de>,
	Michael Hennerich <Michael.Hennerich@...log.com>,
	Jonathan Cameron <jic23@...nel.org>
Subject: [PATCH v1 1/2] iio: adc: ad4000: Check for error code from devm_mutex_init() call

Even if it's not critical, the avoidance of checking the error code
from devm_mutex_init() call today diminishes the point of using devm
variant of it. Tomorrow it may even leak something. Add the missed
check.

Fixes: 938fd562b974 ("iio: adc: Add support for AD4000")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/iio/adc/ad4000.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/ad4000.c b/drivers/iio/adc/ad4000.c
index 6ea491245084..b4a23c97ee52 100644
--- a/drivers/iio/adc/ad4000.c
+++ b/drivers/iio/adc/ad4000.c
@@ -637,7 +637,9 @@ static int ad4000_probe(struct spi_device *spi)
 	indio_dev->name = chip->dev_name;
 	indio_dev->num_channels = 1;
 
-	devm_mutex_init(dev, &st->lock);
+	ret = devm_mutex_init(dev, &st->lock);
+	if (ret)
+		return ret;
 
 	st->gain_milli = 1000;
 	if (chip->has_hardware_gain) {
-- 
2.43.0.rc1.1336.g36b5255a03ac