serial: pmac_zilog: 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/20221019091151.6692-27-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index fe2e4ec423f7948e5fd005c97b0d94e62a580b3e..13668ffdb1e7d781557b5a2b6472c9f6aba9e784 100644 (file)
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -410,8 +410,7 @@ static void pmz_transmit_chars(struct uart_pmac_port *uap)
        write_zsdata(uap, xmit->buf[xmit->tail]);
        zssync(uap);
 
-       xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-       uap->port.icount.tx++;
+       uart_xmit_advance(&uap->port, 1);
 
        if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
                uart_write_wakeup(&uap->port);
@@ -627,8 +626,7 @@ static void pmz_start_tx(struct uart_port *port)
                        return;
                write_zsdata(uap, xmit->buf[xmit->tail]);
                zssync(uap);
-               xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-               port->icount.tx++;
+               uart_xmit_advance(port, 1);
 
                if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
                        uart_write_wakeup(&uap->port);