USB_ENDPOINT_USAGE_MASK
(epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) !=
((epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) !=
(epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) !=
if ((sync_attr & USB_ENDPOINT_USAGE_MASK) == USB_ENDPOINT_USAGE_IMPLICIT_FB)