diff --git a/drivers/tty/serial/m32r_sio.c b/drivers/tty/serial/m32r_sio.c
index b13949a..2e9a390 100644
--- a/drivers/tty/serial/m32r_sio.c
+++ b/drivers/tty/serial/m32r_sio.c
@@ -300,7 +300,8 @@
 
 static void receive_chars(struct uart_sio_port *up, int *status)
 {
-	struct tty_struct *tty = up->port.state->port.tty;
+	struct tty_port *port = &up->port.state->port;
+	struct tty_struct *tty = tport->tty;
 	unsigned char ch;
 	unsigned char flag;
 	int max_count = 256;
@@ -355,7 +356,7 @@
 		if (uart_handle_sysrq_char(&up->port, ch))
 			goto ignore_char;
 		if ((*status & up->port.ignore_status_mask) == 0)
-			tty_insert_flip_char(tty, ch, flag);
+			tty_insert_flip_char(port, ch, flag);
 
 		if (*status & UART_LSR_OE) {
 			/*
@@ -363,7 +364,7 @@
 			 * immediately, and doesn't affect the current
 			 * character.
 			 */
-			tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+			tty_insert_flip_char(port, 0, TTY_OVERRUN);
 		}
 	ignore_char:
 		*status = serial_in(up, UART_LSR);