serial: zs: 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/20221019091151.6692-45-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/zs.c b/drivers/tty/serial/zs.c
index 688db7d8b7488bdb91886ebfb3e5ca6c95065c00..730c648e32ff353af577961ab8213daf1369ce2e 100644 (file)
--- a/drivers/tty/serial/zs.c
+++ b/drivers/tty/serial/zs.c
@@ -623,8 +623,7 @@ static void zs_raw_transmit_chars(struct zs_port *zport)
 
        /* Send char.  */
        write_zsdata(zport, xmit->buf[xmit->tail]);
-       xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-       zport->port.icount.tx++;
+       uart_xmit_advance(&zport->port, 1);
 
        if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
                uart_write_wakeup(&zport->port);