setup_cr
setup_cr();
struct usb_ctrlrequest setup_cr; /* will be used in data stage */
struct usb_ctrlrequest *cr = &uac1->setup_cr;
memcpy(&uac1->setup_cr, cr, sizeof(*cr));
struct usb_ctrlrequest *cr = &uac2->setup_cr;
memcpy(&uac2->setup_cr, cr, sizeof(*cr));
struct usb_ctrlrequest setup_cr; /* will be used in data stage */