diff options
Diffstat (limited to 'drivers/gpio/gpiolib-sysfs.c')
| -rw-r--r-- | drivers/gpio/gpiolib-sysfs.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/gpio/gpiolib-sysfs.c b/drivers/gpio/gpiolib-sysfs.c index 16fe9742597b..3f454eaf2101 100644 --- a/drivers/gpio/gpiolib-sysfs.c +++ b/drivers/gpio/gpiolib-sysfs.c @@ -2,6 +2,7 @@ #include <linux/mutex.h> #include <linux/device.h> #include <linux/sysfs.h> +#include <linux/gpio.h> #include <linux/gpio/consumer.h> #include <linux/gpio/driver.h> #include <linux/interrupt.h> @@ -432,6 +433,11 @@ static struct attribute *gpiochip_attrs[] = { }; ATTRIBUTE_GROUPS(gpiochip); +static struct gpio_desc *gpio_to_valid_desc(int gpio) +{ + return gpio_is_valid(gpio) ? gpio_to_desc(gpio) : NULL; +} + /* * /sys/class/gpio/export ... write-only * integer N ... number of GPIO to export (full access) @@ -450,7 +456,7 @@ static ssize_t export_store(struct class *class, if (status < 0) goto done; - desc = gpio_to_desc(gpio); + desc = gpio_to_valid_desc(gpio); /* reject invalid GPIOs */ if (!desc) { pr_warn("%s: invalid GPIO %ld\n", __func__, gpio); @@ -493,7 +499,7 @@ static ssize_t unexport_store(struct class *class, if (status < 0) goto done; - desc = gpio_to_desc(gpio); + desc = gpio_to_valid_desc(gpio); /* reject bogus commands (gpio_unexport ignores them) */ if (!desc) { pr_warn("%s: invalid GPIO %ld\n", __func__, gpio); @@ -534,8 +540,8 @@ static struct class gpio_class = { /** * gpiod_export - export a GPIO through sysfs - * @gpio: gpio to make available, already requested - * @direction_may_change: true if userspace may change gpio direction + * @desc: GPIO to make available, already requested + * @direction_may_change: true if userspace may change GPIO direction * Context: arch_initcall or later * * When drivers want to make a GPIO accessible to userspace after they @@ -643,7 +649,7 @@ static int match_export(struct device *dev, const void *desc) * gpiod_export_link - create a sysfs link to an exported GPIO node * @dev: device under which to create symlink * @name: name of the symlink - * @gpio: gpio to create symlink to, already exported + * @desc: GPIO to create symlink to, already exported * * Set up a symlink from /sys/.../dev/name to /sys/class/gpio/gpioN * node. Caller is responsible for unlinking. @@ -674,7 +680,7 @@ EXPORT_SYMBOL_GPL(gpiod_export_link); /** * gpiod_unexport - reverse effect of gpiod_export() - * @gpio: gpio to make unavailable + * @desc: GPIO to make unavailable * * This is implicit on gpiod_free(). */ |