usb_add_function — add a function to a configuration
int usb_add_function ( | struct usb_configuration * config, |
struct usb_function * function); |
After initialization, each configuration must have one or more
functions added to it. Adding a function involves calling its bind()
method to allocate resources such as interface and string identifiers
and endpoints.
This function returns the value of the function's bind, which is
zero for success else a negative errno value.