pps: clients: gpio: Bail out on error when requesting GPIO echo line

When requesting optional GPIO echo line, bail out on error,
so user will know that something wrong with the existing property.

Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210318130321.24227-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/pps/clients/pps-gpio.c b/drivers/pps/clients/pps-gpio.c
index e0de1df..f89c31a 100644 (file)
--- a/drivers/pps/clients/pps-gpio.c
+++ b/drivers/pps/clients/pps-gpio.c
@@ -119,12 +119,12 @@ static int pps_gpio_setup(struct platform_device *pdev)
        data->echo_pin = devm_gpiod_get_optional(&pdev->dev,
                        "echo",
                        GPIOD_OUT_LOW);
-       if (data->echo_pin) {
-               if (IS_ERR(data->echo_pin)) {
-                       dev_err(&pdev->dev, "failed to request ECHO GPIO\n");
-                       return PTR_ERR(data->echo_pin);
-               }
+       if (IS_ERR(data->echo_pin)) {
+               dev_err(&pdev->dev, "failed to request ECHO GPIO\n");
+               return PTR_ERR(data->echo_pin);
+       }
 
+       if (data->echo_pin) {
                ret = of_property_read_u32(np,
                        "echo-active-ms",
                        &value);