2 files changed, 6 insertions, 0 deletions

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 742cbe6b042b..efd00de183b1 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -320,6 +320,10 @@ static void __device_release_driver(struct device *dev)
                 devres_release_all(dev);
                 dev->driver = NULL;
                 klist_remove(&dev->p->knode_driver);
+                if (dev->bus)
+                        blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
+                                                     BUS_NOTIFY_UNBOUND_DRIVER,
+                                                     dev);
         }
 }
 
diff --git a/include/linux/device.h b/include/linux/device.h
index a4a7b10aaa48..4410464b134a 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -114,6 +114,8 @@ extern int bus_unregister_notifier(struct bus_type *bus,
 #define BUS_NOTIFY_BOUND_DRIVER         0x00000003 /* driver bound to device */
 #define BUS_NOTIFY_UNBIND_DRIVER        0x00000004 /* driver about to be
                                                       unbound */
+#define BUS_NOTIFY_UNBOUND_DRIVER       0x00000005 /* driver is unbound
+                                                      from the device */
 
 extern struct kset *bus_get_kset(struct bus_type *bus);
 extern struct klist *bus_get_device_klist(struct bus_type *bus);