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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>
hifive-unleashed-5.1
Linus Walleij 2012-11-20 14:56:25 +01:00
parent dfa9751548
commit 8f23ca1a73
1 changed files with 2 additions and 1 deletions
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3
drivers/gpio/gpiolib.c
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@ -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,