diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c
index b7170cb9a544..4304e3f9307d 100644
--- a/drivers/tty/serial/serial-tegra.c
+++ b/drivers/tty/serial/serial-tegra.c
@@ -496,8 +496,7 @@ static void tegra_uart_fill_tx_fifo(struct tegra_uart_port *tup, int max_bytes)
 				break;
 		}
 		tegra_uart_write(tup, xmit->buf[xmit->tail], UART_TX);
-		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-		tup->uport.icount.tx++;
+		uart_xmit_advance(&tup->uport, 1);
 	}
 }