USB_CTRL_XFER_MAX
usbd_transfer_unsetup(udev->ctrl_xfer, USB_CTRL_XFER_MAX);
usbd_transfer_unsetup(udev->ctrl_xfer, USB_CTRL_XFER_MAX);
struct usb_xfer *ctrl_xfer[USB_CTRL_XFER_MAX];
usbd_transfer_unsetup(udev->ctrl_xfer, USB_CTRL_XFER_MAX);
udev->ctrl_xfer, usb_control_ep_cfg, USB_CTRL_XFER_MAX, NULL,
static const struct usb_config usb_control_ep_cfg[USB_CTRL_XFER_MAX] = {