serial: sunsab: 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/20221019091151.6692-38-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/sunsab.c b/drivers/tty/serial/sunsab.c
index 99608b2a2b74f2b0482d4b235f927f9a8affbf78..94db67f21abf2aa1efa9e7bee9b9aee61bd8066f 100644 (file)
--- a/drivers/tty/serial/sunsab.c
+++ b/drivers/tty/serial/sunsab.c
@@ -266,8 +266,7 @@ static void transmit_chars(struct uart_sunsab_port *up,
        for (i = 0; i < up->port.fifosize; i++) {
                writeb(xmit->buf[xmit->tail],
                       &up->regs->w.xfifo[i]);
-               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;
        }
@@ -453,8 +452,7 @@ static void sunsab_start_tx(struct uart_port *port)
        for (i = 0; i < up->port.fifosize; i++) {
                writeb(xmit->buf[xmit->tail],
                       &up->regs->w.xfifo[i]);
-               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;
        }