685 	unsigned tail, head, n;  in gigaset_tty_receive()  local
697 	tail = inbuf->tail;  in gigaset_tty_receive()
700 		head, tail, count);  in gigaset_tty_receive()
702 	if (head <= tail) {  in gigaset_tty_receive()
704 		n = min_t(unsigned, count, RBUFSIZE - tail);  in gigaset_tty_receive()
705 		memcpy(inbuf->data + tail, buf, n);  in gigaset_tty_receive()
706 		tail = (tail + n) % RBUFSIZE;  in gigaset_tty_receive()
713 		n = head - tail - 1;  in gigaset_tty_receive()
720 		memcpy(inbuf->data + tail, buf, count);  in gigaset_tty_receive()
721 		tail += count;  in gigaset_tty_receive()
724 	gig_dbg(DEBUG_INTR, "setting tail to %u", tail);  in gigaset_tty_receive()
725 	inbuf->tail = tail;  in gigaset_tty_receive()