serial: clps711x: fail if mctrl_gpio_init fails

Uwe Kleine-König · gregkh · commit f059a455fc97 · 2015-03-07T03:15:03.000+01:00
mctrl_gpio_init is fully aware of being optional. If it returns an error
code this indicates a real error that must not be ignored.

Signed-off-by: Uwe Kleine-König &lt;u.kleine-koenig@pengutronix.de&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c
@@ -501,6 +501,8 @@ static int uart_clps711x_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, s);
 
 	s->gpios = mctrl_gpio_init(&pdev->dev, 0);
+	if (IS_ERR(s->gpios))
+	    return PTR_ERR(s->gpios);
 
 	ret = uart_add_one_port(&clps711x_uart, &s->port);
 	if (ret)
