USB: core: fix device node leak

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")
Cc: stable <stable@vger.kernel.org>	# v4.6
Acked-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 28b053cacc90556acf7df562fdc502c51b25a02e..62e1906bb2f31d2e76afc0661c942711fcf44765 100644 (file)
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -416,6 +416,8 @@ static void usb_release_dev(struct device *dev)
 
        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);