serial: sunsu: 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/20221019091151.6692-39-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c
index 9ea7e56..fed052a 100644 (file)
--- a/drivers/tty/serial/sunsu.c
+++ b/drivers/tty/serial/sunsu.c
@@ -417,8 +417,7 @@ static void transmit_chars(struct uart_sunsu_port *up)
        count = up->port.fifosize;
        do {
                serial_out(up, UART_TX, xmit->buf[xmit->tail]);
-               xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-               up->port.icount.tx++;
+               uart_xmit_advance(&up->port, 1);
                if (uart_circ_empty(xmit))
                        break;
        } while (--count > 0);