linux-kernel - [PATCH 2/2] gpio: sysfs: fix memory leak in gpiod_sysfs_set_active

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Message-Id: <1422270166-17525-3-git-send-email-johan@kernel.org>
Date:	Mon, 26 Jan 2015 12:02:46 +0100
From:	Johan Hovold <johan@...nel.org>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Alexandre Courbot <gnurou@...il.com>, linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org, Johan Hovold <johan@...nel.org>,
	stable <stable@...r.kernel.org>
Subject: [PATCH 2/2] gpio: sysfs: fix memory leak in gpiod_sysfs_set_active_low

Fix memory leak in the gpio sysfs interface due to failure to drop
reference to device returned by class_find_device when setting the
gpio-line polarity.

Fixes: 0769746183ca ("gpiolib: add support for changing value polarity
in sysfs")
Cc: stable <stable@...r.kernel.org>	# v2.6.33
Signed-off-by: Johan Hovold <johan@...nel.org>
---
 drivers/gpio/gpiolib-sysfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpiolib-sysfs.c b/drivers/gpio/gpiolib-sysfs.c
index 820b1e70ddfe..4908d09873e5 100644
--- a/drivers/gpio/gpiolib-sysfs.c
+++ b/drivers/gpio/gpiolib-sysfs.c
@@ -696,7 +696,7 @@ int gpiod_sysfs_set_active_low(struct gpio_desc *desc, int value)
 	}
 
 	status = sysfs_set_active_low(desc, dev, value);
-
+	put_device(dev);
 unlock:
 	mutex_unlock(&sysfs_lock);
 
-- 
2.0.5

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