serial: arc: 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/20221019091151.6692-11-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/arc_uart.c b/drivers/tty/serial/arc_uart.c
index 2a65ea2660e10c5d903a19a46511b15d45c4514c..748e8b1cf4f7f3e0cebc39e03dfba8b9a1fcd0f7 100644 (file)
--- a/drivers/tty/serial/arc_uart.c
+++ b/drivers/tty/serial/arc_uart.c
@@ -166,8 +166,7 @@ static void arc_serial_tx_chars(struct uart_port *port)
                sent = 1;
        } else if (!uart_circ_empty(xmit)) {
                ch = xmit->buf[xmit->tail];
-               xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-               port->icount.tx++;
+               uart_xmit_advance(port, 1);
                while (!(UART_GET_STATUS(port) & TXEMPTY))
                        cpu_relax();
                UART_SET_DATA(port, ch);