diff options
| author | Kay Sievers <kay.sievers@suse.de> | 2006-06-15 15:31:56 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-06-21 12:40:49 -0700 |
| commit | b9d9c82b4d081feb464f62dfc786c8621d09ecd2 (patch) | |
| tree | 511d15b4d7aaba80a2c0fe49622a3224ca386122 /drivers/base/core.c | |
| parent | 23681e479129854305da1da32f7f1eaf635ef22c (diff) | |
| download | lwn-b9d9c82b4d081feb464f62dfc786c8621d09ecd2.tar.gz lwn-b9d9c82b4d081feb464f62dfc786c8621d09ecd2.zip | |
[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 <kay.sievers@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base/core.c')
| -rw-r--r-- | drivers/base/core.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index 252cf403f891..cc8bb97427d0 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -319,9 +319,12 @@ int device_add(struct device *dev) dev->devt_attr = attr; } - if (dev->class) + if (dev->class) { + sysfs_create_link(&dev->kobj, &dev->class->subsys.kset.kobj, + "subsystem"); sysfs_create_link(&dev->class->subsys.kset.kobj, &dev->kobj, dev->bus_id); + } if ((error = device_pm_add(dev))) goto PMError; @@ -422,8 +425,10 @@ void device_del(struct device * dev) klist_del(&dev->knode_parent); if (dev->devt_attr) device_remove_file(dev, dev->devt_attr); - if (dev->class) + if (dev->class) { + sysfs_remove_link(&dev->kobj, "subsystem"); sysfs_remove_link(&dev->class->subsys.kset.kobj, dev->bus_id); + } device_remove_file(dev, &dev->uevent_attr); /* Notify the platform of the removal, in case they |