*
*/
+#include <linux/async.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/mutex.h>
+#include <linux/sysfs.h>
#include "base.h"
#include "power/power.h"
}
EXPORT_SYMBOL_GPL(bus_remove_file);
+static void bus_release(struct kobject *kobj)
+{
+ struct subsys_private *priv =
+ container_of(kobj, typeof(*priv), subsys.kobj);
+ struct bus_type *bus = priv->bus;
+
+ kfree(priv);
+ bus->p = NULL;
+}
+
static struct kobj_type bus_ktype = {
.sysfs_ops = &bus_sysfs_ops,
+ .release = bus_release,
};
static int bus_uevent_filter(struct kset *kset, struct kobject *kobj)
static struct kset *bus_kset;
/* Manually detach a device from its associated driver. */
-static ssize_t driver_unbind(struct device_driver *drv,
- const char *buf, size_t count)
+static ssize_t unbind_store(struct device_driver *drv, const char *buf,
+ size_t count)
{
struct bus_type *bus = bus_get(drv->bus);
struct device *dev;
bus_put(bus);
return err;
}
-static DRIVER_ATTR(unbind, S_IWUSR, NULL, driver_unbind);
+static DRIVER_ATTR_WO(unbind);
/*
* Manually attach a device to a driver.
* Note: the driver must want to bind to the device,
* it is not possible to override the driver's id table.
*/
-static ssize_t driver_bind(struct device_driver *drv,
- const char *buf, size_t count)
+static ssize_t bind_store(struct device_driver *drv, const char *buf,
+ size_t count)
{
struct bus_type *bus = bus_get(drv->bus);
struct device *dev;
bus_put(bus);
return err;
}
-static DRIVER_ATTR(bind, S_IWUSR, NULL, driver_bind);
+static DRIVER_ATTR_WO(bind);
static ssize_t show_drivers_autoprobe(struct bus_type *bus, char *buf)
{
const char *buf, size_t count)
{
struct device *dev;
+ int err = -EINVAL;
dev = bus_find_device_by_name(bus, NULL, buf);
if (!dev)
return -ENODEV;
- if (bus_rescan_devices_helper(dev, NULL) != 0)
- return -EINVAL;
- return count;
+ if (bus_rescan_devices_helper(dev, NULL) == 0)
+ err = count;
+ put_device(dev);
+ return err;
}
static struct device *next_device(struct klist_iter *i)
if (!bus->dev_attrs)
return 0;
- for (i = 0; attr_name(bus->dev_attrs[i]); i++) {
+ for (i = 0; bus->dev_attrs[i].attr.name; i++) {
error = device_create_file(dev, &bus->dev_attrs[i]);
if (error) {
while (--i >= 0)
int i;
if (bus->dev_attrs) {
- for (i = 0; attr_name(bus->dev_attrs[i]); i++)
+ for (i = 0; bus->dev_attrs[i].attr.name; i++)
device_remove_file(dev, &bus->dev_attrs[i]);
}
}
error = device_add_attrs(bus, dev);
if (error)
goto out_put;
+ error = device_add_groups(dev, bus->dev_groups);
+ if (error)
+ goto out_id;
error = sysfs_create_link(&bus->p->devices_kset->kobj,
&dev->kobj, dev_name(dev));
if (error)
- goto out_id;
+ goto out_groups;
error = sysfs_create_link(&dev->kobj,
&dev->bus->p->subsys.kobj, "subsystem");
if (error)
out_subsys:
sysfs_remove_link(&bus->p->devices_kset->kobj, dev_name(dev));
+out_groups:
+ device_remove_groups(dev, bus->dev_groups);
out_id:
device_remove_attrs(bus, dev);
out_put:
{
struct bus_type *bus = dev->bus;
struct subsys_interface *sif;
- int ret;
if (!bus)
return;
- if (bus->p->drivers_autoprobe) {
- ret = device_attach(dev);
- WARN_ON(ret < 0);
- }
+ if (bus->p->drivers_autoprobe)
+ device_initial_probe(dev);
mutex_lock(&bus->p->mutex);
list_for_each_entry(sif, &bus->p->interfaces, node)
sysfs_remove_link(&dev->bus->p->devices_kset->kobj,
dev_name(dev));
device_remove_attrs(dev->bus, dev);
+ device_remove_groups(dev, dev->bus->dev_groups);
if (klist_node_attached(&dev->p->knode_bus))
klist_del(&dev->p->knode_bus);
bus_put(dev->bus);
}
-static int driver_add_attrs(struct bus_type *bus, struct device_driver *drv)
-{
- int error = 0;
- int i;
-
- if (bus->drv_attrs) {
- for (i = 0; attr_name(bus->drv_attrs[i]); i++) {
- error = driver_create_file(drv, &bus->drv_attrs[i]);
- if (error)
- goto err;
- }
- }
-done:
- return error;
-err:
- while (--i >= 0)
- driver_remove_file(drv, &bus->drv_attrs[i]);
- goto done;
-}
-
-static void driver_remove_attrs(struct bus_type *bus,
- struct device_driver *drv)
-{
- int i;
-
- if (bus->drv_attrs) {
- for (i = 0; attr_name(bus->drv_attrs[i]); i++)
- driver_remove_file(drv, &bus->drv_attrs[i]);
- }
-}
-
static int __must_check add_bind_files(struct device_driver *drv)
{
int ret;
bus_remove_file(bus, &bus_attr_drivers_probe);
}
-static ssize_t driver_uevent_store(struct device_driver *drv,
- const char *buf, size_t count)
+static ssize_t uevent_store(struct device_driver *drv, const char *buf,
+ size_t count)
{
enum kobject_action action;
kobject_uevent(&drv->p->kobj, action);
return count;
}
-static DRIVER_ATTR(uevent, S_IWUSR, NULL, driver_uevent_store);
+static DRIVER_ATTR_WO(uevent);
+
+static void driver_attach_async(void *_drv, async_cookie_t cookie)
+{
+ struct device_driver *drv = _drv;
+ int ret;
+
+ ret = driver_attach(drv);
+
+ pr_debug("bus: '%s': driver %s async attach completed: %d\n",
+ drv->bus->name, drv->name, ret);
+}
/**
* bus_add_driver - Add a driver to the bus.
klist_add_tail(&priv->knode_bus, &bus->p->klist_drivers);
if (drv->bus->p->drivers_autoprobe) {
- error = driver_attach(drv);
- if (error)
- goto out_unregister;
+ if (driver_allows_async_probing(drv)) {
+ pr_debug("bus: '%s': probing driver %s asynchronously\n",
+ drv->bus->name, drv->name);
+ async_schedule(driver_attach_async, drv);
+ } else {
+ error = driver_attach(drv);
+ if (error)
+ goto out_unregister;
+ }
}
module_add_driver(drv->owner, drv);
printk(KERN_ERR "%s: uevent attr (%s) failed\n",
__func__, drv->name);
}
- error = driver_add_attrs(bus, drv);
+ error = driver_add_groups(drv, bus->drv_groups);
if (error) {
/* How the hell do we get out of this pickle? Give up */
- printk(KERN_ERR "%s: driver_add_attrs(%s) failed\n",
+ printk(KERN_ERR "%s: driver_create_groups(%s) failed\n",
__func__, drv->name);
}
if (!drv->suppress_bind_attrs)
remove_bind_files(drv);
- driver_remove_attrs(drv->bus, drv);
+ driver_remove_groups(drv, drv->bus->drv_groups);
driver_remove_file(drv, &driver_attr_uevent);
klist_remove(&drv->p->knode_bus);
pr_debug("bus: '%s': remove driver %s\n", drv->bus->name, drv->name);
}
#endif /* 0 */
-
-/**
- * bus_add_attrs - Add default attributes for this bus.
- * @bus: Bus that has just been registered.
- */
-
-static int bus_add_attrs(struct bus_type *bus)
+static int bus_add_groups(struct bus_type *bus,
+ const struct attribute_group **groups)
{
- int error = 0;
- int i;
-
- if (bus->bus_attrs) {
- for (i = 0; attr_name(bus->bus_attrs[i]); i++) {
- error = bus_create_file(bus, &bus->bus_attrs[i]);
- if (error)
- goto err;
- }
- }
-done:
- return error;
-err:
- while (--i >= 0)
- bus_remove_file(bus, &bus->bus_attrs[i]);
- goto done;
+ return sysfs_create_groups(&bus->p->subsys.kobj, groups);
}
-static void bus_remove_attrs(struct bus_type *bus)
+static void bus_remove_groups(struct bus_type *bus,
+ const struct attribute_group **groups)
{
- int i;
-
- if (bus->bus_attrs) {
- for (i = 0; attr_name(bus->bus_attrs[i]); i++)
- bus_remove_file(bus, &bus->bus_attrs[i]);
- }
+ sysfs_remove_groups(&bus->p->subsys.kobj, groups);
}
static void klist_devices_get(struct klist_node *n)
if (retval)
goto bus_probe_files_fail;
- retval = bus_add_attrs(bus);
+ retval = bus_add_groups(bus, bus->bus_groups);
if (retval)
- goto bus_attrs_fail;
+ goto bus_groups_fail;
pr_debug("bus: '%s': registered\n", bus->name);
return 0;
-bus_attrs_fail:
+bus_groups_fail:
remove_probe_files(bus);
bus_probe_files_fail:
kset_unregister(bus->p->drivers_kset);
pr_debug("bus: '%s': unregistering\n", bus->name);
if (bus->dev_root)
device_unregister(bus->dev_root);
- bus_remove_attrs(bus);
+ bus_remove_groups(bus, bus->bus_groups);
remove_probe_files(bus);
kset_unregister(bus->p->drivers_kset);
kset_unregister(bus->p->devices_kset);
bus_remove_file(bus, &bus_attr_uevent);
kset_unregister(&bus->p->subsys);
- kfree(bus->p);
- bus->p = NULL;
}
EXPORT_SYMBOL_GPL(bus_unregister);
* with the name of the subsystem. The root device can carry subsystem-
* wide attributes. All registered devices are below this single root
* device and are named after the subsystem with a simple enumeration
- * number appended. The registered devices are not explicitely named;
+ * number appended. The registered devices are not explicitly named;
* only 'id' in the device needs to be set.
*
* Do not use this interface for anything new, it exists for compatibility
projects / firefly-linux-kernel-4.4.55.git / blobdiff