gpiolib: return any error code from range creation

If we try to create a range for a certain GPIO chip and the
target pin controller is not yet available it may return
a probe deferral error code, so handle this all the way
our by checking the error code.

Reviewed-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index a59d13d746c5..317ff0440e29 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1218,10 +1218,11 @@ int gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
         pin_range->range.npins = npins;
         pin_range->pctldev = pinctrl_find_and_add_gpio_range(pinctl_name,
                         &pin_range->range);
-        if (!pin_range->pctldev) {
+        if (IS_ERR(pin_range->pctldev)) {
                 pr_err("%s: GPIO chip: could not create pin range\n",
                        chip->label);
                 kfree(pin_range);
+                return PTR_ERR(pin_range->pctldev);
         }
         pr_debug("%s: GPIO chip: created GPIO range %d->%d ==> PIN %d->%d\n",
                  chip->label, offset, offset + npins - 1,