diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index d29b512a7d9fac1b182d1f63a0a34d3c181fc46d..00d4b114f1bf3c945432a6a9faac7100229f49e3 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -525,8 +525,7 @@ static void __init serial8250_isa_init_ports(void)
 			base_ops = port->ops;
 		port->ops = &univ8250_port_ops;
 
-		init_timer(&up->timer);
-		up->timer.function = serial8250_timeout;
+		setup_timer(&up->timer, serial8250_timeout, 0UL);
 
 		up->ops = &univ8250_driver_ops;