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Driver core: create devices/virtual/ tree

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This change creates a devices/virtual/CLASS_NAME tree for struct devices
that belong to a class, yet do not have a "real" struct device for a
parent.  It automatically creates the directories on the fly as needed.


Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman
2006-08-07 22:19:37 -07:00
parent a2de48cace
commit c205ef4880
3 changed files with 28 additions and 1 deletions
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17
drivers/base/class.c
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@@ -19,6 +19,8 @@
#include <linux/slab.h>
#include "base.h"
extern struct subsystem devices_subsys;
#define to_class_attr(_attr) container_of(_attr, struct class_attribute, attr)
#define to_class(obj) container_of(obj, struct class, subsys.kset.kobj)
@@ -878,7 +880,22 @@ void class_interface_unregister(struct class_interface *class_intf)
class_put(parent);
}
int virtual_device_parent(struct device *dev)
{
if (!dev->class)
return -ENODEV;
if (!dev->class->virtual_dir) {
static struct kobject *virtual_dir = NULL;
if (!virtual_dir)
virtual_dir = kobject_add_dir(&devices_subsys.kset.kobj, "virtual");
dev->class->virtual_dir = kobject_add_dir(virtual_dir, dev->class->name);
}
dev->kobj.parent = dev->class->virtual_dir;
return 0;
}
int __init classes_init(void)
{