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authorJohan Hovold <johan@kernel.org>2015-01-12 17:12:24 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-01-27 08:18:56 -0800
commit6bea41fbaba9e102a620c1794ae540addad35447 (patch)
treeaf48909230da4ea79108f5a863b3f94204346f1f /drivers/gpio
parentff80cc960fd67e2fa871eaead6252ad41935703a (diff)
gpio: fix memory and reference leaks in gpiochip_add error path
commit 5539b3c938d64a60cb1fc442ac3ce9263d52de0c upstream. 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: 391c970c0dd1 ("of/gpio: add default of_xlate function if device has a node pointer") Fixes: 664e3e5ac64c ("gpio / ACPI: register to ACPI events automatically") Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpiolib.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 50c4922fe53a..5b88c83888d1 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1222,6 +1222,9 @@ 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
@@ -1229,12 +1232,12 @@ 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,