Messages in this thread Patch in this message | | | From | <> | Subject | [PATCH] gpio: gpiolib-devprop: Check chip->parent pointer before dereferencing | Date | Tue, 25 Oct 2016 11:31:23 -0500 |
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From: Thor Thayer <tthayer@opensource.altera.com>
Confirm the chip->parent is valid before dereferencing because the parent parameter is optional.
Signed-off-by: Thor Thayer <tthayer@opensource.altera.com> --- drivers/gpio/gpiolib-devprop.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/gpio/gpiolib-devprop.c b/drivers/gpio/gpiolib-devprop.c index 17bfc41..27f383b 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) -- 1.9.1
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