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Commit 7ac1cf4a authored by Kay Sievers's avatar Kay Sievers Committed by Greg Kroah-Hartman
Browse files

Driver core: add uevent file for bus and driver 



This has been in the SuSE kernels for some time now.

Signed-off-by: default avatarKay Sievers <kay.sievers@vrfy.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 5c5daf65

drivers/base/bus.c

+35 −0
Original line number Diff line number Diff line
@@ -610,6 +610,17 @@ static inline int add_probe_files(struct bus_type *bus) { return 0; } 
static inline void remove_probe_files(struct bus_type *bus) {}

#endif



static ssize_t driver_uevent_store(struct device_driver *drv,

				   const char *buf, size_t count)

{

	enum kobject_action action;



	if (kobject_action_type(buf, count, &action) == 0)

		kobject_uevent(&drv->kobj, action);

	return count;

}

static DRIVER_ATTR(uevent, S_IWUSR, NULL, driver_uevent_store);



/**

 *	bus_add_driver - Add a driver to the bus.

 *	@drv:	driver.
@@ -640,6 +651,11 @@ int bus_add_driver(struct device_driver *drv) 
	klist_add_tail(&drv->knode_bus, &bus->klist_drivers);

	module_add_driver(drv->owner, drv);



	error = driver_create_file(drv, &driver_attr_uevent);

	if (error) {

		printk(KERN_ERR "%s: uevent attr (%s) failed\n",

			__FUNCTION__, drv->name);

	}

	error = driver_add_attrs(bus, drv);

	if (error) {

		/* How the hell do we get out of this pickle? Give up */
@@ -677,6 +693,7 @@ 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);

	pr_debug("bus %s: remove driver %s\n", drv->bus->name, drv->name);

	driver_detach(drv);
@@ -804,6 +821,17 @@ static void klist_devices_put(struct klist_node *n) 
	put_device(dev);

}



static ssize_t bus_uevent_store(struct bus_type *bus,

				const char *buf, size_t count)

{

	enum kobject_action action;



	if (kobject_action_type(buf, count, &action) == 0)

		kobject_uevent(&bus->subsys.kobj, action);

	return count;

}

static BUS_ATTR(uevent, S_IWUSR, NULL, bus_uevent_store);



/**

 *	bus_register - register a bus with the system.

 *	@bus:	bus.
@@ -828,6 +856,10 @@ int bus_register(struct bus_type * bus) 
	if (retval)

		goto out;



	retval = bus_create_file(bus, &bus_attr_uevent);

	if (retval)

		goto bus_uevent_fail;



	kobject_set_name(&bus->devices.kobj, "devices");

	bus->devices.kobj.parent = &bus->subsys.kobj;

	retval = kset_register(&bus->devices);
@@ -863,6 +895,8 @@ bus_probe_files_fail: 
bus_drivers_fail:

	kset_unregister(&bus->devices);

bus_devices_fail:

	bus_remove_file(bus, &bus_attr_uevent);

bus_uevent_fail:

	subsystem_unregister(&bus->subsys);

out:

	return retval;
@@ -882,6 +916,7 @@ void bus_unregister(struct bus_type * bus) 
	remove_probe_files(bus);

	kset_unregister(&bus->drivers);

	kset_unregister(&bus->devices);

	bus_remove_file(bus, &bus_attr_uevent);

	subsystem_unregister(&bus->subsys);

}