[PATCH 3.10 01/17] gpio: sysfs: fix memory leak in gpiod_export_link

Greg Kroah-Hartman
2015-02-09T08:34:44Z

From: Johan Hovold <johan@kernel.org>

commit 0f303db08df0df9bd0966443ad6001e63960af16 upstream.

Fix memory leak in the gpio sysfs interface due to failure to drop
reference to device returned by class_find_device when creating a link.

Fixes: a4177ee7f1a8 ("gpiolib: allow exported GPIO nodes to be named using sysfs links")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpio/gpiolib.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -874,6 +874,7 @@ static int gpiod_export_link(struct devi
if (tdev != NULL) {
status = sysfs_create_link(&dev->kobj, &tdev->kobj,
name);
+ put_device(tdev);
} else {
status = -ENODEV;
}