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| author | Johan Hovold <johan@kernel.org> | 2015-01-12 17:12:24 +0100 |
|---|---|---|
| committer | Luis Henriques <luis.henriques@canonical.com> | 2015-02-04 10:57:19 +0000 |
| commit | 185419ab8d107c9ccfc6071ffbce346d8a3e640b (patch) | |
| tree | a1f75d99404dbea3dae6b24eff5b780a7d3dda44 | |
| parent | 9086ea6d8dacad483f9bcd902e50ff8a9ffad940 (diff) | |
| download | linux-stable-185419ab8d107c9ccfc6071ffbce346d8a3e640b.tar.gz linux-stable-185419ab8d107c9ccfc6071ffbce346d8a3e640b.tar.bz2 linux-stable-185419ab8d107c9ccfc6071ffbce346d8a3e640b.zip | |
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: Luis Henriques <luis.henriques@canonical.com>
| -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 810c84fd00c4..aea93a2f69b4 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1223,6 +1223,9 @@ 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 @@ -1230,12 +1233,12 @@ 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, |