driver core: fix device_create() error path

We call put_device() in the error path, which is fine for dev==NULL.
However, in case kobject_set_name_vargs() fails, we have dev!=NULL but
device_initialized() wasn't called, yet.

Fix this by splitting device_register() into explicit calls to
device_add() and an early call to device_initialize().

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 67b180d855b2..aab43fbb8336 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -1603,6 +1603,7 @@ device_create_groups_vargs(struct class *class, struct device *parent,
                 goto error;
         }
 
+        device_initialize(dev);
         dev->devt = devt;
         dev->class = class;
         dev->parent = parent;
@@ -1614,7 +1615,7 @@ device_create_groups_vargs(struct class *class, struct device *parent,
         if (retval)
                 goto error;
 
-        retval = device_register(dev);
+        retval = device_add(dev);
         if (retval)
                 goto error;