diff options
Diffstat (limited to 'drivers/base/driver.c')
| -rw-r--r-- | drivers/base/driver.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/drivers/base/driver.c b/drivers/base/driver.c index 3b269f7e5213..1b645886e9eb 100644 --- a/drivers/base/driver.c +++ b/drivers/base/driver.c @@ -18,6 +18,43 @@ #define to_dev(node) container_of(node, struct device, driver_list) #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. + * + * 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 klist_iter i; + struct device * dev; + int error = 0; + + 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); + klist_iter_exit(&i); + return error; +} + +EXPORT_SYMBOL_GPL(driver_for_each_device); + + /** * driver_create_file - create sysfs file for driver. * @drv: driver. @@ -85,7 +122,7 @@ void put_driver(struct device_driver * drv) */ 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); } |