linux-kernel - [PATCH v1 1/2] gpio: mpsse: Check for error code from devm_mutex

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Message-ID: <20241030153201.2078266-2-andriy.shevchenko@linux.intel.com>
Date: Wed, 30 Oct 2024 17:30:26 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Mary Strodl <mstrodl@....rit.edu>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>
Subject: [PATCH v1 1/2] gpio: mpsse: 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: c46a74ff05c0 ("gpio: add support for FTDI's MPSSE as GPIO")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/gpio/gpio-mpsse.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-mpsse.c b/drivers/gpio/gpio-mpsse.c
index 3ab6651d2226..8fba0779ae17 100644
--- a/drivers/gpio/gpio-mpsse.c
+++ b/drivers/gpio/gpio-mpsse.c
@@ -430,8 +430,13 @@ static int gpio_mpsse_probe(struct usb_interface *interface,
 	if (err)
 		return err;
 
-	devm_mutex_init(dev, &priv->io_mutex);
-	devm_mutex_init(dev, &priv->irq_mutex);
+	err = devm_mutex_init(dev, &priv->io_mutex);
+	if (err)
+		return err;
+
+	ret = devm_mutex_init(dev, &priv->irq_mutex);
+	if (err)
+		return err;
 
 	priv->gpio.label = devm_kasprintf(dev, GFP_KERNEL,
 					  "gpio-mpsse.%d.%d",
-- 
2.43.0.rc1.1336.g36b5255a03ac