#define to_drv(obj) container_of(obj, struct device_driver, kobj)
+static struct device * next_device(struct klist_iter * i)
+{
+ struct klist_node * n = klist_next(i);
+ return n ? container_of(n, struct device, knode_driver) : NULL;
+}
+
/**
* driver_for_each_device - Iterator for devices bound to a driver.
* @drv: Driver we're iterating.
* @data: Data to pass to the callback.
* @fn: Function to call for each device.
*
- * Take the bus's rwsem and iterate over the @drv's list of devices,
- * calling @fn for each one.
+ * Iterate over the @drv's list of devices calling @fn for each one.
*/
int driver_for_each_device(struct device_driver * drv, struct device * start,
void * data, int (*fn)(struct device *, void *))
{
- struct list_head * head;
+ struct klist_iter i;
struct device * dev;
int error = 0;
- down_read(&drv->bus->subsys.rwsem);
- head = &drv->devices;
- dev = list_prepare_entry(start, head, driver_list);
- list_for_each_entry_continue(dev, head, driver_list) {
- get_device(dev);
+ if (!drv)
+ return -EINVAL;
+
+ klist_iter_init_node(&drv->klist_devices, &i,
+ start ? &start->knode_driver : NULL);
+ while ((dev = next_device(&i)) && !error)
error = fn(dev, data);
- put_device(dev);
- if (error)
- break;
- }
- up_read(&drv->bus->subsys.rwsem);
+ klist_iter_exit(&i);
return error;
}
-EXPORT_SYMBOL(driver_for_each_device);
+EXPORT_SYMBOL_GPL(driver_for_each_device);
/**
*/
int driver_register(struct device_driver * drv)
{
- INIT_LIST_HEAD(&drv->devices);
+ klist_init(&drv->klist_devices);
init_completion(&drv->unloaded);
return bus_add_driver(drv);
}