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gpio: fix memory and reference leaks in gpiochip_add error path

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Memory allocated and references taken by of_gpiochip_add and
acpi_gpiochip_add were never released on errors in gpiochip_add (e.g.
failure to find free gpio range).

Fixes: 391c970c0d ("of/gpio: add default of_xlate function if device
has a node pointer")
Fixes: 664e3e5ac6 ("gpio / ACPI: register to ACPI events
automatically")
Cc: stable <stable@vger.kernel.org>

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Johan Hovold 2015-01-12 17:12:24 +01:00 committed by Linus Walleij
parent e733a2fb8c
commit 5539b3c938
1 changed files with 7 additions and 4 deletions
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11
drivers/gpio/gpiolib.c
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@ -277,6 +277,9 @@ int gpiochip_add(struct gpio_chip *chip)
spin_unlock_irqrestore(&gpio_lock, flags);
if (status)
goto fail;
#ifdef CONFIG_PINCTRL
INIT_LIST_HEAD(&chip->pin_ranges);
#endif
@ -284,12 +287,12 @@ int gpiochip_add(struct gpio_chip *chip)
of_gpiochip_add(chip);
acpi_gpiochip_add(chip);
if (status)
goto fail;
status = gpiochip_export(chip);
if (status)
if (status) {
acpi_gpiochip_remove(chip);
of_gpiochip_remove(chip);
goto fail;
}
pr_debug("%s: registered GPIOs %d to %d on device: %s\n", __func__,
chip->base, chip->base + chip->ngpio - 1,