diff options
| -rw-r--r-- | drivers/gpio/gpiolib-sysfs.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/gpio/gpiolib-sysfs.c b/drivers/gpio/gpiolib-sysfs.c index ad7173df72eb..3dbaf489a8a5 100644 --- a/drivers/gpio/gpiolib-sysfs.c +++ b/drivers/gpio/gpiolib-sysfs.c @@ -8,6 +8,7 @@ #include <linux/interrupt.h> #include <linux/kdev_t.h> #include <linux/slab.h> +#include <linux/ctype.h> #include "gpiolib.h" @@ -124,7 +125,7 @@ static ssize_t value_store(struct device *dev, { struct gpiod_data *data = dev_get_drvdata(dev); struct gpio_desc *desc = data->desc; - ssize_t status; + ssize_t status = 0; mutex_lock(&data->mutex); @@ -133,7 +134,11 @@ static ssize_t value_store(struct device *dev, } else { long value; - status = kstrtol(buf, 0, &value); + if (size <= 2 && isdigit(buf[0]) && + (size == 1 || buf[1] == '\n')) + value = buf[0] - '0'; + else + status = kstrtol(buf, 0, &value); if (status == 0) { gpiod_set_value_cansleep(desc, value); status = size; |