Driver core: make device_is_registered() work for class devices

device_is_registered() can use the kobject value for this, so it will
now work with devices that are associated with only a class, not a bus
and a driver.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 3 insertions, 9 deletions

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 2d207ad30336..450942acca1a 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -505,14 +505,11 @@ void bus_attach_device(struct device *dev)
         int ret = 0;
 
         if (bus) {
-                dev->is_registered = 1;
                 if (bus->p->drivers_autoprobe)
                         ret = device_attach(dev);
                 WARN_ON(ret < 0);
                 if (ret >= 0)
                         klist_add_tail(&dev->knode_bus, &bus->p->klist_devices);
-                else
-                        dev->is_registered = 0;
         }
 }
 
@@ -533,10 +530,8 @@ void bus_remove_device(struct device *dev)
                 sysfs_remove_link(&dev->bus->p->devices_kset->kobj,
                                   dev->bus_id);
                 device_remove_attrs(dev->bus, dev);
-                if (dev->is_registered) {
-                        dev->is_registered = 0;
-                        klist_del(&dev->knode_bus);
-                }
+                klist_del(&dev->knode_bus);
+
                 pr_debug("bus: '%s': remove device %s\n",
                          dev->bus->name, dev->bus_id);
                 device_release_driver(dev);
diff --git a/include/linux/device.h b/include/linux/device.h
index d7a1ae063b65..441461f5ee20 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -429,7 +429,6 @@ struct device {
         struct kobject kobj;
         char    bus_id[BUS_ID_SIZE];    /* position on parent bus */
         struct device_type      *type;
-        unsigned                is_registered:1;
         unsigned                uevent_suppress:1;
 
         struct semaphore        sem;    /* semaphore to synchronize calls to
@@ -509,7 +508,7 @@ static inline void dev_set_drvdata(struct device *dev, void *data)
 
 static inline int device_is_registered(struct device *dev)
 {
-        return dev->is_registered;
+        return dev->kobj.state_in_sysfs;
 }
 
 void driver_init(void);