EP0_MAX_PKT_SIZE
usb_ep_set_maxpacket_limit(&ep->usb_ep, EP0_MAX_PKT_SIZE);
.wMaxPacketSize = cpu_to_le16(EP0_MAX_PKT_SIZE),
cpu_to_le16(EP0_MAX_PKT_SIZE);
bdc->gadget.ep0->maxpacket = EP0_MAX_PKT_SIZE;