1 files changed, 62 insertions, 30 deletions

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index c5d6bb4290ad..510e7884975f 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -26,33 +26,28 @@
 #define to_drv(node) container_of(node, struct device_driver, kobj.entry)
 
 
-/**
- *      device_bind_driver - bind a driver to one device.
- *      @dev:   device.
- *
- *      Allow manual attachment of a driver to a device.
- *      Caller must have already set @dev->driver.
- *
- *      Note that this does not modify the bus reference count
- *      nor take the bus's rwsem. Please verify those are accounted
- *      for before calling this. (It is ok to call with no other effort
- *      from a driver's probe() method.)
- *
- *      This function must be called with @dev->sem held.
- */
-int device_bind_driver(struct device *dev)
+static void driver_bound(struct device *dev)
 {
-        int ret;
-
         if (klist_node_attached(&dev->knode_driver)) {
                 printk(KERN_WARNING "%s: device %s already bound\n",
                         __FUNCTION__, kobject_name(&dev->kobj));
-                return 0;
+                return;
         }
 
         pr_debug("bound device '%s' to driver '%s'\n",
                  dev->bus_id, dev->driver->name);
+
+        if (dev->bus)
+                blocking_notifier_call_chain(&dev->bus->bus_notifier,
+                                             BUS_NOTIFY_BOUND_DRIVER, dev);
+
         klist_add_tail(&dev->knode_driver, &dev->driver->klist_devices);
+}
+
+static int driver_sysfs_add(struct device *dev)
+{
+        int ret;
+
         ret = sysfs_create_link(&dev->driver->kobj, &dev->kobj,
                           kobject_name(&dev->kobj));
         if (ret == 0) {
@@ -65,6 +60,36 @@ int device_bind_driver(struct device *dev)
         return ret;
 }
 
+static void driver_sysfs_remove(struct device *dev)
+{
+        struct device_driver *drv = dev->driver;
+
+        if (drv) {
+                sysfs_remove_link(&drv->kobj, kobject_name(&dev->kobj));
+                sysfs_remove_link(&dev->kobj, "driver");
+        }
+}
+
+/**
+ *      device_bind_driver - bind a driver to one device.
+ *      @dev:   device.
+ *
+ *      Allow manual attachment of a driver to a device.
+ *      Caller must have already set @dev->driver.
+ *
+ *      Note that this does not modify the bus reference count
+ *      nor take the bus's rwsem. Please verify those are accounted
+ *      for before calling this. (It is ok to call with no other effort
+ *      from a driver's probe() method.)
+ *
+ *      This function must be called with @dev->sem held.
+ */
+int device_bind_driver(struct device *dev)
+{
+        driver_bound(dev);
+        return driver_sysfs_add(dev);
+}
+
 struct stupid_thread_structure {
         struct device_driver *drv;
         struct device *dev;
@@ -85,30 +110,32 @@ static int really_probe(void *void_data)
                  drv->bus->name, drv->name, dev->bus_id);
 
         dev->driver = drv;
+        if (driver_sysfs_add(dev)) {
+                printk(KERN_ERR "%s: driver_sysfs_add(%s) failed\n",
+                        __FUNCTION__, dev->bus_id);
+                goto probe_failed;
+        }
+
         if (dev->bus->probe) {
                 ret = dev->bus->probe(dev);
-                if (ret) {
-                        dev->driver = NULL;
+                if (ret)
                         goto probe_failed;
-                }
         } else if (drv->probe) {
                 ret = drv->probe(dev);
-                if (ret) {
-                        dev->driver = NULL;
+                if (ret)
                         goto probe_failed;
-                }
-        }
-        if (device_bind_driver(dev)) {
-                printk(KERN_ERR "%s: device_bind_driver(%s) failed\n",
-                        __FUNCTION__, dev->bus_id);
-                /* How does undo a ->probe?  We're screwed. */
         }
+
+        driver_bound(dev);
         ret = 1;
         pr_debug("%s: Bound Device %s to Driver %s\n",
                  drv->bus->name, dev->bus_id, drv->name);
         goto done;
 
 probe_failed:
+        driver_sysfs_remove(dev);
+        dev->driver = NULL;
+
         if (ret == -ENODEV || ret == -ENXIO) {
                 /* Driver matched, but didn't support device
                  * or device not found.
@@ -284,10 +311,15 @@ static void __device_release_driver(struct device * dev)
         drv = dev->driver;
         if (drv) {
                 get_driver(drv);
-                sysfs_remove_link(&drv->kobj, kobject_name(&dev->kobj));
+                driver_sysfs_remove(dev);
                 sysfs_remove_link(&dev->kobj, "driver");
                 klist_remove(&dev->knode_driver);
 
+                if (dev->bus)
+                        blocking_notifier_call_chain(&dev->bus->bus_notifier,
+                                                     BUS_NOTIFY_UNBIND_DRIVER,
+                                                     dev);
+
                 if (dev->bus && dev->bus->remove)
                         dev->bus->remove(dev);
                 else if (drv->remove)