USB_CDC_NCM_NDP32_NOCRC_SIGN
skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP32_NOCRC_SIGN));
if (ndp.ndp32->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP32_NOCRC_SIGN)) {
.ndp_sign = USB_CDC_NCM_NDP32_NOCRC_SIGN,