diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 6274213d8d2d..bff4f594a90d 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -2747,7 +2747,7 @@ static int sci_request_port(struct uart_port *port)
 
 	ret = sci_remap_port(port);
 	if (unlikely(ret != 0)) {
-		release_resource(res);
+		release_mem_region(port->mapbase, sport->reg_size);
 		return ret;
 	}