diff options
| author | Thor Thayer <tthayer@opensource.altera.com> | 2016-10-25 18:31:23 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-10-25 20:23:19 +0200 |
| commit | 5a195c6d4ecf43be26ee1c8be6140025832adfd2 (patch) | |
| tree | 361a8a073c8d3143c3c291053c045b4b80b4fea4 /drivers/gpio | |
| parent | gpio: altera-a10sr: Drop unnecessary gpiochip_remove (diff) | |
| download | linux-5a195c6d4ecf43be26ee1c8be6140025832adfd2.tar.xz linux-5a195c6d4ecf43be26ee1c8be6140025832adfd2.zip | |
gpio: gpiolib-devprop: Check chip->parent pointer before dereferencing
Confirm the chip->parent is valid before dereferencing because
the parent parameter is optional.
Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib-devprop.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib-devprop.c b/drivers/gpio/gpiolib-devprop.c index 17bfc41692ef..27f383bda7d9 100644 --- a/drivers/gpio/gpiolib-devprop.c +++ b/drivers/gpio/gpiolib-devprop.c @@ -31,6 +31,11 @@ void devprop_gpiochip_set_names(struct gpio_chip *chip) const char **names; int ret, i; + if (!chip->parent) { + dev_warn(&gdev->dev, "GPIO chip parent is NULL\n"); + return; + } + ret = device_property_read_string_array(chip->parent, "gpio-line-names", NULL, 0); if (ret < 0) |