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
usb_destroy_configuration(udev);
usb_release_bos_descriptor(udev);
+ if (udev->parent)
+ of_node_put(dev->of_node);
usb_put_hcd(hcd);
kfree(udev->product);
kfree(udev->manufacturer);