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[PATCH] Driver core: add generic "subsystem" link to all devices

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Like the SUBSYTEM= key we find in the environment of the uevent, this
creates a generic "subsystem" link in sysfs for every device. Userspace
usually doesn't care at all if its a "class" or a "bus" device. This
provides an unified way to determine the subsytem of a device, regardless
of the way the driver core has created it.

Signed-off-by: Kay Sievers <kay.sievers@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers
2006-06-15 15:31:56 +02:00
committed by Greg Kroah-Hartman
parent 23681e4791
commit b9d9c82b4d
5 changed files with 17 additions and 7 deletions
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2
drivers/base/bus.c
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@ -374,6 +374,7 @@ int bus_add_device(struct device * dev)
error = device_add_attrs(bus, dev);
if (!error) {
sysfs_create_link(&bus->devices.kobj, &dev->kobj, dev->bus_id);
sysfs_create_link(&dev->kobj, &dev->bus->subsys.kset.kobj, "subsystem");
sysfs_create_link(&dev->kobj, &dev->bus->subsys.kset.kobj, "bus");
}
}
@ -408,6 +409,7 @@ void bus_attach_device(struct device * dev)
void bus_remove_device(struct device * dev)
{
if (dev->bus) {
sysfs_remove_link(&dev->kobj, "subsystem");
sysfs_remove_link(&dev->kobj, "bus");
sysfs_remove_link(&dev->bus->devices.kobj, dev->bus_id);
device_remove_attrs(dev->bus, dev);