firewire: Use device->groups for adding device attributes.
We dynamically create an attribute group for the key present on the
device in hand and point device->group to it. This way the device
core adds the sysfs attributes for us as the device is added.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/firewire/fw-device.c b/drivers/firewire/fw-device.c
index 2bf86aa..5db666f 100644
--- a/drivers/firewire/fw-device.c
+++ b/drivers/firewire/fw-device.c
@@ -289,32 +289,29 @@
};
static void
-remove_config_rom_attributes(struct device *dev)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(config_rom_attributes); i++)
- device_remove_file(dev, &config_rom_attributes[i].attr);
-}
-
-static int
-add_config_rom_attributes(struct device *dev)
+init_fw_attribute_group(struct device *dev,
+ struct device_attribute *attrs,
+ struct fw_attribute_group *group)
{
struct device_attribute *attr;
- int i, err = 0;
+ int i, j;
+
+ for (j = 0; attrs[j].attr.name != NULL; j++)
+ group->attrs[j] = &attrs[j].attr;
for (i = 0; i < ARRAY_SIZE(config_rom_attributes); i++) {
attr = &config_rom_attributes[i].attr;
if (attr->show(dev, attr, NULL) < 0)
continue;
- err = device_create_file(dev, attr);
- if (err < 0) {
- remove_config_rom_attributes(dev);
- break;
- }
+ group->attrs[j++] = &attr->attr;
}
- return err;
+ BUG_ON(j >= ARRAY_SIZE(group->attrs));
+ group->attrs[j++] = NULL;
+ group->groups[0] = &group->group;
+ group->groups[1] = NULL;
+ group->group.attrs = group->attrs;
+ dev->groups = group->groups;
}
static ssize_t
@@ -497,7 +494,6 @@
}
static struct device_type fw_unit_type = {
- .attrs = fw_unit_attributes,
.uevent = fw_unit_uevent,
.release = fw_unit_release,
};
@@ -534,16 +530,14 @@
snprintf(unit->device.bus_id, sizeof unit->device.bus_id,
"%s.%d", device->device.bus_id, i++);
+ init_fw_attribute_group(&unit->device,
+ fw_unit_attributes,
+ &unit->attribute_group);
if (device_register(&unit->device) < 0)
goto skip_unit;
- if (add_config_rom_attributes(&unit->device) < 0)
- goto skip_unregister;
-
continue;
- skip_unregister:
- device_unregister(&unit->device);
skip_unit:
kfree(unit);
}
@@ -551,9 +545,6 @@
static int shutdown_unit(struct device *device, void *data)
{
- struct fw_unit *unit = fw_unit(device);
-
- remove_config_rom_attributes(&unit->device);
device_unregister(device);
return 0;
@@ -583,15 +574,12 @@
idr_remove(&fw_device_idr, minor);
up_write(&fw_bus_type.subsys.rwsem);
- remove_config_rom_attributes(&device->device);
-
fw_device_cdev_remove(device);
device_for_each_child(&device->device, NULL, shutdown_unit);
device_unregister(&device->device);
}
static struct device_type fw_device_type = {
- .attrs = fw_device_attributes,
.release = fw_device_release,
};
@@ -647,15 +635,14 @@
snprintf(device->device.bus_id, sizeof device->device.bus_id,
"fw%d", minor);
+ init_fw_attribute_group(&device->device,
+ fw_device_attributes,
+ &device->attribute_group);
if (device_add(&device->device)) {
fw_error("Failed to add device.\n");
goto error_with_cdev;
}
- err = add_config_rom_attributes(&device->device);
- if (err < 0)
- goto error_with_register;
-
create_units(device);
/* Transition the device to running state. If it got pulled
@@ -682,8 +669,6 @@
return;
- error_with_register:
- device_unregister(&device->device);
error_with_cdev:
down_write(&fw_bus_type.subsys.rwsem);
idr_remove(&fw_device_idr, minor);