diff options
| author | Johan Hovold <johan@kernel.org> | 2015-01-12 17:12:24 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2015-01-14 14:23:47 +0100 |
| commit | 5539b3c938d64a60cb1fc442ac3ce9263d52de0c (patch) | |
| tree | c588c1c932ff8a98bd6fbb8dc27430b3d094fe90 /drivers/gpio | |
| parent | e733a2fb8cbcff0747108cb529ffb4e4a00465ac (diff) | |
| download | linux-5539b3c938d64a60cb1fc442ac3ce9263d52de0c.tar.gz linux-5539b3c938d64a60cb1fc442ac3ce9263d52de0c.tar.xz | |
gpio: fix memory and reference leaks in gpiochip_add error path
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")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 487afe6f22fc..89c59f5f1924 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -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, |