diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index a428e88938eb..e136cec0c0be 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -764,7 +764,7 @@ int serial8250_register_8250_port(const struct uart_8250_port *up)
 	 * Only call mctrl_gpio_init(), if the device has no ACPI
 	 * companion device
 	 */
-	if (!has_acpi_companion(uart->port.dev)) {
+	if (uart->port.dev && !has_acpi_companion(uart->port.dev)) {
 		struct mctrl_gpios *gpios = mctrl_gpio_init(&uart->port, 0);
 		if (IS_ERR(gpios)) {
 			ret = PTR_ERR(gpios);