diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index 4587ed4d4d5d0..8eb586ac3b0da 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -162,7 +162,6 @@ static void meson_uart_start_tx(struct uart_port *port)
 			break;
 
 		writel(ch, port->membase + AML_UART_WFIFO);
-		uart_xmit_advance(port, 1);
 	}
 
 	if (!kfifo_is_empty(&tport->xmit_fifo)) {
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 7814982f19215..2bd25afe0d925 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -855,7 +855,6 @@ static void qcom_geni_serial_send_chunk_fifo(struct uart_port *uport,
 					     unsigned int chunk)
 {
 	struct qcom_geni_serial_port *port = to_dev_port(uport);
-	struct tty_port *tport = &uport->state->port;
 	unsigned int tx_bytes, remaining = chunk;
 	u8 buf[BYTES_PER_FIFO_WORD];
 
@@ -863,8 +862,7 @@ static void qcom_geni_serial_send_chunk_fifo(struct uart_port *uport,
 		memset(buf, 0, sizeof(buf));
 		tx_bytes = min(remaining, BYTES_PER_FIFO_WORD);
 
-		tx_bytes = kfifo_out(&tport->xmit_fifo, buf, tx_bytes);
-		uart_xmit_advance(uport, tx_bytes);
+		tx_bytes = uart_fifo_out(uport, buf, tx_bytes);
 
 		iowrite32_rep(uport->membase + SE_GENI_TX_FIFOn, buf, 1);