diff --git a/drivers/acpi/device_sysfs.c b/drivers/acpi/device_sysfs.c index 6e4858ea035f..4afc773383ad 100644 --- a/drivers/acpi/device_sysfs.c +++ b/drivers/acpi/device_sysfs.c @@ -517,6 +517,85 @@ static ssize_t status_show(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR_RO(status); +static struct attribute *acpi_attrs[] = { + &dev_attr_path.attr, + &dev_attr_hid.attr, + &dev_attr_modalias.attr, + &dev_attr_description.attr, + &dev_attr_adr.attr, + &dev_attr_uid.attr, + &dev_attr_sun.attr, + &dev_attr_hrv.attr, + &dev_attr_status.attr, + &dev_attr_eject.attr, + &dev_attr_power_state.attr, + &dev_attr_real_power_state.attr, + NULL +}; + +static bool acpi_show_attr(struct acpi_device *dev, const struct device_attribute *attr) +{ + /* + * Devices gotten from FADT don't have a "path" attribute + */ + if (attr == &dev_attr_path) + return dev->handle; + + if (attr == &dev_attr_hid || attr == &dev_attr_modalias) + return !list_empty(&dev->pnp.ids); + + if (attr == &dev_attr_description) + return acpi_has_method(dev->handle, "_STR"); + + if (attr == &dev_attr_adr) + return dev->pnp.type.bus_address; + + if (attr == &dev_attr_uid) + return acpi_device_uid(dev); + + if (attr == &dev_attr_sun) + return acpi_has_method(dev->handle, "_SUN"); + + if (attr == &dev_attr_hrv) + return acpi_has_method(dev->handle, "_HRV"); + + if (attr == &dev_attr_status) + return acpi_has_method(dev->handle, "_STA"); + + /* + * If device has _EJ0, 'eject' file is created that is used to trigger + * hot-removal function from userland. + */ + if (attr == &dev_attr_eject) + return acpi_has_method(dev->handle, "_EJ0"); + + if (attr == &dev_attr_power_state) + return dev->flags.power_manageable; + + if (attr == &dev_attr_real_power_state) + return dev->flags.power_manageable && dev->power.flags.power_resources; + + dev_warn_once(&dev->dev, "Unexpected attribute: %s\n", attr->attr.name); + return false; +} + +static umode_t acpi_attr_is_visible(struct kobject *kobj, + struct attribute *attr, + int attrno) +{ + struct acpi_device *dev = to_acpi_device(kobj_to_dev(kobj)); + + if (acpi_show_attr(dev, container_of(attr, struct device_attribute, attr))) + return attr->mode; + else + return 0; +} + +static const struct attribute_group acpi_group = { + .attrs = acpi_attrs, + .is_visible = acpi_attr_is_visible, +}; + /** * acpi_device_setup_files - Create sysfs attributes of an ACPI device. * @dev: ACPI device object. @@ -525,80 +604,10 @@ int acpi_device_setup_files(struct acpi_device *dev) { int result = 0; - /* - * Devices gotten from FADT don't have a "path" attribute - */ - if (dev->handle) { - result = device_create_file(&dev->dev, &dev_attr_path); - if (result) - goto end; - } - - if (!list_empty(&dev->pnp.ids)) { - result = device_create_file(&dev->dev, &dev_attr_hid); - if (result) - goto end; - - result = device_create_file(&dev->dev, &dev_attr_modalias); - if (result) - goto end; - } - - /* - * If device has _STR, 'description' file is created - */ - if (acpi_has_method(dev->handle, "_STR")) { - result = device_create_file(&dev->dev, &dev_attr_description); - if (result) - goto end; - } - - if (dev->pnp.type.bus_address) - result = device_create_file(&dev->dev, &dev_attr_adr); - if (acpi_device_uid(dev)) - result = device_create_file(&dev->dev, &dev_attr_uid); - - if (acpi_has_method(dev->handle, "_SUN")) { - result = device_create_file(&dev->dev, &dev_attr_sun); - if (result) - goto end; - } - - if (acpi_has_method(dev->handle, "_HRV")) { - result = device_create_file(&dev->dev, &dev_attr_hrv); - if (result) - goto end; - } - - if (acpi_has_method(dev->handle, "_STA")) { - result = device_create_file(&dev->dev, &dev_attr_status); - if (result) - goto end; - } - - /* - * If device has _EJ0, 'eject' file is created that is used to trigger - * hot-removal function from userland. - */ - if (acpi_has_method(dev->handle, "_EJ0")) { - result = device_create_file(&dev->dev, &dev_attr_eject); - if (result) - return result; - } - - if (dev->flags.power_manageable) { - result = device_create_file(&dev->dev, &dev_attr_power_state); - if (result) - return result; - - if (dev->power.flags.power_resources) - result = device_create_file(&dev->dev, - &dev_attr_real_power_state); - } + result = device_add_group(&dev->dev, &acpi_group); acpi_expose_nondev_subnodes(&dev->dev.kobj, &dev->data); -end: return result; } @@ -609,39 +618,5 @@ end: void acpi_device_remove_files(struct acpi_device *dev) { acpi_hide_nondev_subnodes(&dev->data); - - if (dev->flags.power_manageable) { - device_remove_file(&dev->dev, &dev_attr_power_state); - if (dev->power.flags.power_resources) - device_remove_file(&dev->dev, - &dev_attr_real_power_state); - } - - /* - * If device has _STR, remove 'description' file - */ - if (acpi_has_method(dev->handle, "_STR")) - device_remove_file(&dev->dev, &dev_attr_description); - /* - * If device has _EJ0, remove 'eject' file. - */ - if (acpi_has_method(dev->handle, "_EJ0")) - device_remove_file(&dev->dev, &dev_attr_eject); - - if (acpi_has_method(dev->handle, "_SUN")) - device_remove_file(&dev->dev, &dev_attr_sun); - - if (acpi_has_method(dev->handle, "_HRV")) - device_remove_file(&dev->dev, &dev_attr_hrv); - - if (acpi_device_uid(dev)) - device_remove_file(&dev->dev, &dev_attr_uid); - if (dev->pnp.type.bus_address) - device_remove_file(&dev->dev, &dev_attr_adr); - device_remove_file(&dev->dev, &dev_attr_modalias); - device_remove_file(&dev->dev, &dev_attr_hid); - if (acpi_has_method(dev->handle, "_STA")) - device_remove_file(&dev->dev, &dev_attr_status); - if (dev->handle) - device_remove_file(&dev->dev, &dev_attr_path); + device_remove_group(&dev->dev, &acpi_group); }