From b9d9c82b4d081feb464f62dfc786c8621d09ecd2 Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Thu, 15 Jun 2006 15:31:56 +0200 Subject: [PATCH] Driver core: add generic "subsystem" link to all devices 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 Signed-off-by: Greg Kroah-Hartman --- drivers/base/bus.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/base/bus.c') diff --git a/drivers/base/bus.c b/drivers/base/bus.c index 64ba9011d1a8..050d86d0b872 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -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); -- cgit v1.2.3