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kset: convert struct bus_device->devices to use kset_create

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Dynamically create the kset instead of declaring it statically.

Having 3 static kobjects in one structure is not only foolish, but ripe
for nasty race conditions if handled improperly.  We also rename the
field to catch any potential users of it (not that there should be
outside of the driver core...)

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2007-11-01 13:31:26 -07:00
parent 039a5dcd2f
commit 3d8995963d
2 changed files with 11 additions and 10 deletions
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19
drivers/base/bus.c
View file

@ -449,7 +449,7 @@ int bus_add_device(struct device * dev)
error = device_add_attrs(bus, dev);
if (error)
goto out_put;
error = sysfs_create_link(&bus->devices.kobj,
error = sysfs_create_link(&bus->devices_kset->kobj,
&dev->kobj, dev->bus_id);
if (error)
goto out_id;
@ -466,7 +466,7 @@ int bus_add_device(struct device * dev)
out_deprecated:
sysfs_remove_link(&dev->kobj, "subsystem");
out_subsys:
sysfs_remove_link(&bus->devices.kobj, dev->bus_id);
sysfs_remove_link(&bus->devices_kset->kobj, dev->bus_id);
out_id:
device_remove_attrs(bus, dev);
out_put:
@ -512,7 +512,7 @@ void bus_remove_device(struct device * dev)
if (dev->bus) {
sysfs_remove_link(&dev->kobj, "subsystem");
remove_deprecated_bus_links(dev);
sysfs_remove_link(&dev->bus->devices.kobj, dev->bus_id);
sysfs_remove_link(&dev->bus->devices_kset->kobj, dev->bus_id);
device_remove_attrs(dev->bus, dev);
if (dev->is_registered) {
dev->is_registered = 0;
@ -862,11 +862,12 @@ int bus_register(struct bus_type * bus)
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);
if (retval)
bus->devices_kset = kset_create_and_add("devices", NULL,
&bus->subsys.kobj);
if (!bus->devices_kset) {
retval = -ENOMEM;
goto bus_devices_fail;
}
kobject_set_name(&bus->drivers.kobj, "drivers");
bus->drivers.kobj.parent = &bus->subsys.kobj;
@ -894,7 +895,7 @@ int bus_register(struct bus_type * bus)
bus_probe_files_fail:
kset_unregister(&bus->drivers);
bus_drivers_fail:
kset_unregister(&bus->devices);
kset_unregister(bus->devices_kset);
bus_devices_fail:
bus_remove_file(bus, &bus_attr_uevent);
bus_uevent_fail:
@ -916,7 +917,7 @@ void bus_unregister(struct bus_type * bus)
bus_remove_attrs(bus);
remove_probe_files(bus);
kset_unregister(&bus->drivers);
kset_unregister(&bus->devices);
kset_unregister(bus->devices_kset);
bus_remove_file(bus, &bus_attr_uevent);
subsystem_unregister(&bus->subsys);
}

2
include/linux/device.h
View file

@ -55,7 +55,7 @@ struct bus_type {
struct kset subsys;
struct kset drivers;
struct kset devices;
struct kset *devices_kset;
struct klist klist_devices;
struct klist klist_drivers;