diff options
Diffstat (limited to 'drivers/base/bus.c')
| -rw-r--r-- | drivers/base/bus.c | 46 |
1 files changed, 29 insertions, 17 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c index 2bcef657a60c..76aed01a8b2c 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -296,11 +296,13 @@ int bus_for_each_dev(struct bus_type *bus, struct device *start, if (!bus) return -EINVAL; - klist_iter_init_node(&bus->p->klist_devices, &i, - (start ? &start->p->knode_bus : NULL)); - while ((dev = next_device(&i)) && !error) - error = fn(dev, data); - klist_iter_exit(&i); + error = klist_iter_init_node(&bus->p->klist_devices, &i, + (start ? &start->p->knode_bus : NULL)); + if (!error) { + while ((dev = next_device(&i)) && !error) + error = fn(dev, data); + klist_iter_exit(&i); + } return error; } EXPORT_SYMBOL_GPL(bus_for_each_dev); @@ -330,8 +332,10 @@ struct device *bus_find_device(struct bus_type *bus, if (!bus) return NULL; - klist_iter_init_node(&bus->p->klist_devices, &i, - (start ? &start->p->knode_bus : NULL)); + if (klist_iter_init_node(&bus->p->klist_devices, &i, + (start ? &start->p->knode_bus : NULL)) < 0) + return NULL; + while ((dev = next_device(&i))) if (match(dev, data) && get_device(dev)) break; @@ -384,7 +388,9 @@ struct device *subsys_find_device_by_id(struct bus_type *subsys, unsigned int id return NULL; if (hint) { - klist_iter_init_node(&subsys->p->klist_devices, &i, &hint->p->knode_bus); + if (klist_iter_init_node(&subsys->p->klist_devices, &i, + &hint->p->knode_bus) < 0) + return NULL; dev = next_device(&i); if (dev && dev->id == id && get_device(dev)) { klist_iter_exit(&i); @@ -446,11 +452,13 @@ int bus_for_each_drv(struct bus_type *bus, struct device_driver *start, if (!bus) return -EINVAL; - klist_iter_init_node(&bus->p->klist_drivers, &i, - start ? &start->p->knode_bus : NULL); - while ((drv = next_driver(&i)) && !error) - error = fn(drv, data); - klist_iter_exit(&i); + error = klist_iter_init_node(&bus->p->klist_drivers, &i, + start ? &start->p->knode_bus : NULL); + if (!error) { + while ((drv = next_driver(&i)) && !error) + error = fn(drv, data); + klist_iter_exit(&i); + } return error; } EXPORT_SYMBOL_GPL(bus_for_each_drv); @@ -1111,15 +1119,19 @@ EXPORT_SYMBOL_GPL(bus_sort_breadthfirst); * otherwise if it is NULL, the iteration starts at the beginning of * the list. */ -void subsys_dev_iter_init(struct subsys_dev_iter *iter, struct bus_type *subsys, - struct device *start, const struct device_type *type) +int subsys_dev_iter_init(struct subsys_dev_iter *iter, struct bus_type *subsys, + struct device *start, const struct device_type *type) { struct klist_node *start_knode = NULL; + int error; if (start) start_knode = &start->p->knode_bus; - klist_iter_init_node(&subsys->p->klist_devices, &iter->ki, start_knode); - iter->type = type; + error = klist_iter_init_node(&subsys->p->klist_devices, &iter->ki, + start_knode); + if (!error) + iter->type = type; + return error; } EXPORT_SYMBOL_GPL(subsys_dev_iter_init); |