[PATCH 4.9 13/41] USB: core: fix device node leak

From: Greg Kroah-Hartman
Date: Mon Jul 10 2017 - 13:16:27 EST

4.9-stable review patch. If anyone has any objections, please let me know.


From: Johan Hovold <johan@xxxxxxxxxx>

commit e271b2c909a22a2c13b2d5f77f2ce0091b74540c upstream.

Make sure to release any OF device-node reference taken when creating
the USB device.

Note that we currently do not hold a reference to the root hub
device-tree node (i.e. the parent controller node).

Fixes: 69bec7259853 ("USB: core: let USB device know device node")
Acked-by: Peter Chen <peter.chen@xxxxxxx>
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

drivers/usb/core/usb.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -279,6 +279,8 @@ static void usb_release_dev(struct devic

+ if (udev->parent)
+ of_node_put(dev->of_node);