linux-kernel - [PATCH RFC/RFT 03/15] gpio: sysfs: call mutex_destroy() in gpiod

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Message-Id: <20250610-gpio-sysfs-chip-export-v1-3-a8c7aa4478b1@linaro.org>
Date: Tue, 10 Jun 2025 16:38:18 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Ahmad Fatoum <a.fatoum@...gutronix.de>, 
 Kent Gibson <warthog618@...il.com>, 
 Jan Lübbe <jlu@...gutronix.de>, 
 Marek Vasut <marex@...x.de>, Geert Uytterhoeven <geert+renesas@...der.be>, 
 Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH RFC/RFT 03/15] gpio: sysfs: call mutex_destroy() in
 gpiod_unexport()

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

While not critical, it's useful to have the corresponding call to
mutex_destroy() whenever we use mutex_init(). Add the call right before
kfreeing the GPIO data.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/gpio/gpiolib-sysfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/gpiolib-sysfs.c b/drivers/gpio/gpiolib-sysfs.c
index 4a3aa09dad9d54dc77f28d596723fd5546cb3ae8..cd3381a4bc93a94b9a975248ae3e4bd8c2a3eb4b 100644
--- a/drivers/gpio/gpiolib-sysfs.c
+++ b/drivers/gpio/gpiolib-sysfs.c
@@ -713,6 +713,7 @@ void gpiod_unexport(struct gpio_desc *desc)
 	}
 
 	put_device(dev);
+	mutex_destroy(&data->mutex);
 	kfree(data);
 }
 EXPORT_SYMBOL_GPL(gpiod_unexport);

-- 
2.48.1