1 files changed, 10 insertions, 4 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 6bee6af8d8e1..f1290cbd1350 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -56,7 +56,14 @@ static inline int device_is_not_partition(struct device *dev)
  */
 const char *dev_driver_string(const struct device *dev)
 {
-        return dev->driver ? dev->driver->name :
+        struct device_driver *drv;
+
+        /* dev->driver can change to NULL underneath us because of unbinding,
+         * so be careful about accessing it.  dev->bus and dev->class should
+         * never change once they are set, so they don't need special care.
+         */
+        drv = ACCESS_ONCE(dev->driver);
+        return drv ? drv->name :
                         (dev->bus ? dev->bus->name :
                         (dev->class ? dev->class->name : ""));
 }
@@ -987,6 +994,8 @@ done:
         device_remove_class_symlinks(dev);
  SymlinkError:
         if (MAJOR(dev->devt))
+                devtmpfs_delete_node(dev);
+        if (MAJOR(dev->devt))
                 device_remove_sys_dev_entry(dev);
  devtattrError:
         if (MAJOR(dev->devt))
@@ -1728,8 +1737,5 @@ void device_shutdown(void)
                         dev->driver->shutdown(dev);
                 }
         }
-        kobject_put(sysfs_dev_char_kobj);
-        kobject_put(sysfs_dev_block_kobj);
-        kobject_put(dev_kobj);
         async_synchronize_full();
 }