diff options
Diffstat (limited to 'drivers/base/bus.c')
| -rw-r--r-- | drivers/base/bus.c | 71 |
1 files changed, 39 insertions, 32 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c index 04d3850ff4b7..aa0c986c323a 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -3,6 +3,8 @@ * * Copyright (c) 2002-3 Patrick Mochel * Copyright (c) 2002-3 Open Source Development Labs + * Copyright (c) 2007 Greg Kroah-Hartman <gregkh@suse.de> + * Copyright (c) 2007 Novell Inc. * * This file is released under the GPLv2 * @@ -24,7 +26,6 @@ */ #define to_drv_attr(_attr) container_of(_attr, struct driver_attribute, attr) -#define to_driver(obj) container_of(obj, struct device_driver, kobj) static int __must_check bus_rescan_devices_helper(struct device *dev, @@ -49,11 +50,11 @@ static ssize_t drv_attr_show(struct kobject * kobj, struct attribute * attr, char * buf) { struct driver_attribute * drv_attr = to_drv_attr(attr); - struct device_driver * drv = to_driver(kobj); + struct driver_private *drv_priv = to_driver(kobj); ssize_t ret = -EIO; if (drv_attr->show) - ret = drv_attr->show(drv, buf); + ret = drv_attr->show(drv_priv->driver, buf); return ret; } @@ -62,11 +63,11 @@ drv_attr_store(struct kobject * kobj, struct attribute * attr, const char * buf, size_t count) { struct driver_attribute * drv_attr = to_drv_attr(attr); - struct device_driver * drv = to_driver(kobj); + struct driver_private *drv_priv = to_driver(kobj); ssize_t ret = -EIO; if (drv_attr->store) - ret = drv_attr->store(drv, buf, count); + ret = drv_attr->store(drv_priv->driver, buf, count); return ret; } @@ -75,22 +76,12 @@ static struct sysfs_ops driver_sysfs_ops = { .store = drv_attr_store, }; - -static void driver_release(struct kobject * kobj) +static void driver_release(struct kobject *kobj) { - /* - * Yes this is an empty release function, it is this way because struct - * device is always a static object, not a dynamic one. Yes, this is - * not nice and bad, but remember, drivers are code, reference counted - * by the module count, not a device, which is really data. And yes, - * in the future I do want to have all drivers be created dynamically, - * and am working toward that goal, but it will take a bit longer... - * - * But do not let this example give _anyone_ the idea that they can - * create a release function without any code in it at all, to do that - * is almost always wrong. If you have any questions about this, - * please send an email to <greg@kroah.com> - */ + struct driver_private *drv_priv = to_driver(kobj); + + pr_debug("%s: freeing %s\n", __FUNCTION__, kobject_name(kobj)); + kfree(drv_priv); } static struct kobj_type driver_ktype = { @@ -350,7 +341,13 @@ struct device * bus_find_device(struct bus_type *bus, static struct device_driver * next_driver(struct klist_iter * i) { struct klist_node * n = klist_next(i); - return n ? container_of(n, struct device_driver, knode_bus) : NULL; + struct driver_private *drv_priv; + + if (n) { + drv_priv = container_of(n, struct driver_private, knode_bus); + return drv_priv->driver; + } + return NULL; } /** @@ -384,7 +381,7 @@ int bus_for_each_drv(struct bus_type * bus, struct device_driver * start, return -EINVAL; klist_iter_init_node(&bus->p->klist_drivers, &i, - start ? &start->knode_bus : NULL); + start ? &start->p->knode_bus : NULL); while ((drv = next_driver(&i)) && !error) error = fn(drv, data); klist_iter_exit(&i); @@ -620,7 +617,7 @@ static ssize_t driver_uevent_store(struct device_driver *drv, enum kobject_action action; if (kobject_action_type(buf, count, &action) == 0) - kobject_uevent(&drv->kobj, action); + kobject_uevent(&drv->p->kobj, action); return count; } static DRIVER_ATTR(uevent, S_IWUSR, NULL, driver_uevent_store); @@ -632,19 +629,29 @@ static DRIVER_ATTR(uevent, S_IWUSR, NULL, driver_uevent_store); */ int bus_add_driver(struct device_driver *drv) { - struct bus_type * bus = bus_get(drv->bus); + struct bus_type *bus; + struct driver_private *priv; int error = 0; + bus = bus_get(drv->bus); if (!bus) return -EINVAL; pr_debug("bus %s: add driver %s\n", bus->name, drv->name); - error = kobject_set_name(&drv->kobj, "%s", drv->name); + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + error = kobject_set_name(&priv->kobj, "%s", drv->name); if (error) goto out_put_bus; - drv->kobj.kset = bus->p->drivers_kset; - drv->kobj.ktype = &driver_ktype; - error = kobject_register(&drv->kobj); + priv->kobj.kset = bus->p->drivers_kset; + priv->kobj.ktype = &driver_ktype; + klist_init(&priv->klist_devices, NULL, NULL); + priv->driver = drv; + drv->p = priv; + error = kobject_register(&priv->kobj); if (error) goto out_put_bus; @@ -653,7 +660,7 @@ int bus_add_driver(struct device_driver *drv) if (error) goto out_unregister; } - klist_add_tail(&drv->knode_bus, &bus->p->klist_drivers); + klist_add_tail(&priv->knode_bus, &bus->p->klist_drivers); module_add_driver(drv->owner, drv); error = driver_create_file(drv, &driver_attr_uevent); @@ -676,7 +683,7 @@ int bus_add_driver(struct device_driver *drv) return error; out_unregister: - kobject_unregister(&drv->kobj); + kobject_unregister(&priv->kobj); out_put_bus: bus_put(bus); return error; @@ -699,11 +706,11 @@ void bus_remove_driver(struct device_driver * drv) remove_bind_files(drv); driver_remove_attrs(drv->bus, drv); driver_remove_file(drv, &driver_attr_uevent); - klist_remove(&drv->knode_bus); + klist_remove(&drv->p->knode_bus); pr_debug("bus %s: remove driver %s\n", drv->bus->name, drv->name); driver_detach(drv); module_remove_driver(drv); - kobject_unregister(&drv->kobj); + kobject_unregister(&drv->p->kobj); bus_put(drv->bus); } |