509 	if (s->chan_tx && !uart_circ_empty(&s->port.state->xmit) &&  in sci_start_tx()
709 	struct circ_buf *xmit = &port->state->xmit;  in sci_transmit_chars()  local
718 		if (uart_circ_empty(xmit))  in sci_transmit_chars()
734 		} else if (!uart_circ_empty(xmit) && !stopped) {  in sci_transmit_chars()
735 			c = xmit->buf[xmit->tail];  in sci_transmit_chars()
736 			xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);  in sci_transmit_chars()
748 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in sci_transmit_chars()
750 	if (uart_circ_empty(xmit)) {  in sci_transmit_chars()
1020 	struct circ_buf *xmit = &port->state->xmit;  in sci_dma_tx_complete()  local
1027 	xmit->tail += s->tx_dma_len;  in sci_dma_tx_complete()
1028 	xmit->tail &= UART_XMIT_SIZE - 1;  in sci_dma_tx_complete()
1032 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in sci_dma_tx_complete()
1035 	if (!uart_circ_empty(xmit)) {  in sci_dma_tx_complete()
1213 	struct circ_buf *xmit = &port->state->xmit;  in work_fn_tx()  local
1224 	buf = s->tx_dma_addr + (xmit->tail & (UART_XMIT_SIZE - 1));  in work_fn_tx()
1226 		CIRC_CNT(xmit->head, xmit->tail, UART_XMIT_SIZE),  in work_fn_tx()
1227 		CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE));  in work_fn_tx()
1256 		__func__, xmit->buf, xmit->tail, xmit->head, s->cookie_tx);  in work_fn_tx()
1395 						port->state->xmit.buf,  in sci_request_dma()
1405 				port->state->xmit.buf, &s->tx_dma_addr);  in sci_request_dma()