serial: ar933x: 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/20221019091151.6692-10-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c
index 925484a..4c3d04c 100644 (file)
--- a/drivers/tty/serial/ar933x_uart.c
+++ b/drivers/tty/serial/ar933x_uart.c
@@ -425,8 +425,7 @@ static void ar933x_uart_tx_chars(struct ar933x_uart_port *up)
 
                ar933x_uart_putc(up, xmit->buf[xmit->tail]);
 
-               xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-               up->port.icount.tx++;
+               uart_xmit_advance(&up->port, 1);
        } while (--count > 0);
 
        if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)