commit 3d44a6fd upstream.

If setup() fails a reference for runtime PM has already
been taken. Proper use of the error handling in btusb_open()is needed.
You cannot just return.

Fixes: ace31982 ("Bluetooth: btusb: Add setup callback for chip init on USB")
Signed-off-by: NOliver Neukum <oneukum@suse.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>