MUSB_EP0_STAGE_ACKWAIT
case MUSB_EP0_STAGE_ACKWAIT: /* STALL for zero-length data */
case MUSB_EP0_STAGE_ACKWAIT: return "wait";
musb->ep0_state = MUSB_EP0_STAGE_ACKWAIT;
case MUSB_EP0_STAGE_ACKWAIT:
case MUSB_EP0_STAGE_ACKWAIT:
case MUSB_EP0_STAGE_ACKWAIT: /* zero-length data */
else if (musb->ep0_state == MUSB_EP0_STAGE_ACKWAIT) {