[3.13.y-ckt stable] Patch "gpio: sysfs: fix memory leak in gpiod_sysfs_set_active_low" has been added to staging queue

Kamal Mostafa kamal at canonical.com
Thu Mar 19 22:29:27 UTC 2015

This is a note to let you know that I have just added a patch titled

    gpio: sysfs: fix memory leak in gpiod_sysfs_set_active_low

to the linux-3.13.y-queue branch of the 3.13.y-ckt extended stable tree 
which can be found at:


This patch is scheduled to be released in version 3.13.11-ckt17.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y-ckt tree, see



>From 5a14939ca156447461b5d29fe3282142ffbcb6c9 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan at kernel.org>
Date: Mon, 26 Jan 2015 12:02:46 +0100
Subject: gpio: sysfs: fix memory leak in gpiod_sysfs_set_active_low

commit 49d2ca84e433dab854c7a866bc6add09cfab682d upstream.

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")
Signed-off-by: Johan Hovold <johan at kernel.org>
Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
[ kamal: backport to 3.13-stable: applied to drivers/gpio/gpiolib.c ]
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
 drivers/gpio/gpiolib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 1dda7e6..e90efc0 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -942,7 +942,7 @@ int gpiod_sysfs_set_active_low(struct gpio_desc *desc, int value)

 	status = sysfs_set_active_low(desc, dev, value);
+	put_device(dev);


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