c52873e5a1ef ("usb: cdc-acm: make sure a refcount is taken early enough")
cae2bc768d17 ("usb: cdc-acm: Decrement tty port's refcount if probe() fail")
74bccc9b71dc ("cdc-acm: store in and out pipes in acm structure")
add125054b87 ("cdc-acm: fix wrong pipe type on rx interrupt xfers")
6dd3587f515e ("cdc-acm: cleanup error handling")