serial: sb1250-duart: Use uart_xmit_advance()

Take advantage of the new uart_xmit_advance() helper.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20221019091151.6692-30-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/sb1250-duart.c b/drivers/tty/serial/sb1250-duart.c
index c5d2b6cdcb4a1f44cfa0d0c64dae17a0d3551b10..de56f383964e68c749dbab7c41b586bd89ba2e3c 100644 (file)
--- a/drivers/tty/serial/sb1250-duart.c
+++ b/drivers/tty/serial/sb1250-duart.c
@@ -399,8 +399,7 @@ static void sbd_transmit_chars(struct sbd_port *sport)
        /* Send char.  */
        if (!stop_tx) {
                write_sbdchn(sport, R_DUART_TX_HOLD, xmit->buf[xmit->tail]);
-               xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-               sport->port.icount.tx++;
+               uart_xmit_advance(&sport->port, 1);
 
                if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
                        uart_write_wakeup(&sport->port);