diff options
Diffstat (limited to 'drivers/gpio/gpiolib-sysfs.c')
| -rw-r--r-- | drivers/gpio/gpiolib-sysfs.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/gpio/gpiolib-sysfs.c b/drivers/gpio/gpiolib-sysfs.c index 06372c7c822c..9047b2d556a0 100644 --- a/drivers/gpio/gpiolib-sysfs.c +++ b/drivers/gpio/gpiolib-sysfs.c @@ -16,6 +16,8 @@ struct gpiod_data { struct mutex mutex; struct kernfs_node *value_kn; int irq; + + bool direction_can_change; }; /* @@ -354,7 +356,7 @@ static umode_t gpio_is_visible(struct kobject *kobj, struct attribute *attr, struct gpiod_data *data = dev_get_drvdata(dev); struct gpio_desc *desc = data->desc; umode_t mode = attr->mode; - bool show_direction = test_bit(FLAG_SYSFS_DIR, &desc->flags); + bool show_direction = data->direction_can_change; if (attr == &dev_attr_direction.attr) { if (!show_direction) @@ -583,12 +585,6 @@ int gpiod_export(struct gpio_desc *desc, bool direction_may_change) status = -EPERM; goto err_unlock; } - - if (chip->direction_input && chip->direction_output && - direction_may_change) { - set_bit(FLAG_SYSFS_DIR, &desc->flags); - } - spin_unlock_irqrestore(&gpio_lock, flags); data = kzalloc(sizeof(*data), GFP_KERNEL); @@ -599,6 +595,10 @@ int gpiod_export(struct gpio_desc *desc, bool direction_may_change) data->desc = desc; mutex_init(&data->mutex); + if (chip->direction_input && chip->direction_output) + data->direction_can_change = direction_may_change; + else + data->direction_can_change = false; offset = gpio_chip_hwgpio(desc); if (chip->names && chip->names[offset]) @@ -693,7 +693,6 @@ void gpiod_unexport(struct gpio_desc *desc) data = dev_get_drvdata(dev); - clear_bit(FLAG_SYSFS_DIR, &desc->flags); clear_bit(FLAG_EXPORT, &desc->flags); device_unregister(dev); |