attribute_container_add_class_device() first calls device_add() and then
creates the container attributes. If attribute_container_add_attrs() fails,
the helper returns the error with the class device still registered.

Callers use an error from this helper as a failed add and do not call
device_del() on that path. Undo the successful device_add() before
returning the attribute creation error.

Signed-off-by: Yuho Choi <dbgh9129@gmail.com>
---
 drivers/base/attribute_container.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/base/attribute_container.c b/drivers/base/attribute_container.c
index 4ad26b8dd6a5..3c456374247b 100644
--- a/drivers/base/attribute_container.c
+++ b/drivers/base/attribute_container.c
@@ -425,7 +425,12 @@ attribute_container_add_class_device(struct device *classdev)
 
 	if (error)
 		return error;
-	return attribute_container_add_attrs(classdev);
+
+	error = attribute_container_add_attrs(classdev);
+	if (error)
+		device_del(classdev);
+
+	return error;
 }
 
 /**
-- 
2.43.0