diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index 3f8ccb87c..4af4fbda2 100755
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -731,12 +731,13 @@ static int meson_uart_probe(struct platform_device *pdev)
 	struct resource *res_mem, *res_irq;
 	struct uart_port *port;
 	int ret = 0;
-	int id = -1;
 
 	if (pdev->dev.of_node)
 		pdev->id = of_alias_get_id(pdev->dev.of_node, "serial");
 
 	if (pdev->id < 0) {
+		int id;
+
 		for (id = AML_UART_PORT_OFFSET; id < AML_UART_PORT_NUM; id++) {
 			if (!meson_ports[id]) {
 				pdev->id = id;