usb_init should call destroy_workqueue when usb_register fails.
Signed-off-by: NMaxime Austruy <maxime@tralhalla.org>
Signed-off-by: NUlrich Kunitz <kune@deine-taler.de>
Signed-off-by: NDaniel Drake <dsd@gentoo.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>