[PATCH] Driver core: add proper symlinks for devices

We need to create the "compatible" symlinks that class_devices used to
create when they were in the class directories so that userspace does
not know anything changed at all.

Yeah, we have a lot of symlinks now, but we should be able to get rid of
them in a year or two... (wishful thinking...)

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/base/core.c b/drivers/base/core.c
index cc8bb97..a979bc3 100644 (file)
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -273,6 +273,7 @@ void device_initialize(struct device *dev)
 int device_add(struct device *dev)
 {
        struct device *parent = NULL;
+       char *class_name = NULL;
        int error = -EINVAL;
 
        dev = get_device(dev);
@@ -324,6 +325,10 @@ int device_add(struct device *dev)
                                  "subsystem");
                sysfs_create_link(&dev->class->subsys.kset.kobj, &dev->kobj,
                                  dev->bus_id);
+
+               sysfs_create_link(&dev->kobj, &dev->parent->kobj, "device");
+               class_name = make_class_name(dev->class->name, &dev->kobj);
+               sysfs_create_link(&dev->parent->kobj, &dev->kobj, class_name);
        }
 
        if ((error = device_pm_add(dev)))
@@ -339,6 +344,7 @@ int device_add(struct device *dev)
        if (platform_notify)
                platform_notify(dev);
  Done:
+       kfree(class_name);
        put_device(dev);
        return error;
  BusError:
@@ -420,6 +426,7 @@ void put_device(struct device * dev)
 void device_del(struct device * dev)
 {
        struct device * parent = dev->parent;
+       char *class_name = NULL;
 
        if (parent)
                klist_del(&dev->knode_parent);
@@ -428,6 +435,10 @@ void device_del(struct device * dev)
        if (dev->class) {
                sysfs_remove_link(&dev->kobj, "subsystem");
                sysfs_remove_link(&dev->class->subsys.kset.kobj, dev->bus_id);
+               class_name = make_class_name(dev->class->name, &dev->kobj);
+               sysfs_remove_link(&dev->kobj, "device");
+               sysfs_remove_link(&dev->parent->kobj, class_name);
+               kfree(class_name);
        }
        device_remove_file(dev, &dev->uevent_attr);