serial: MIPS: lantiq: use devm_iounmap instead of iounmap

port->membase was allocated using devm_ioremap_nocache, so ideally
we should unmap it using devm_iounmap. but it was using iounmap.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c
index 4675fe198d31a625498dc43dfd0dfea72ed7faad..18c3844510ff7c6b7b754f8fe3d2d4d0af737e00 100644 (file)
--- a/drivers/tty/serial/lantiq.c
+++ b/drivers/tty/serial/lantiq.c
@@ -497,8 +497,10 @@ lqasc_type(struct uart_port *port)
 static void
 lqasc_release_port(struct uart_port *port)
 {
+       struct platform_device *pdev = to_platform_device(port->dev);
+
        if (port->flags & UPF_IOREMAP) {
-               iounmap(port->membase);
+               devm_iounmap(&pdev->dev, port->membase);
                port->membase = NULL;
        }
 }