[PATCH -next] Input: serio - fix possible memory leak while device_add() fails

[Zhu Wang <wangzhu9@huawei.com>]

If device_add() returns error, the name allocated by dev_set_name() need
be freed. As comment of device_add() says, it should use put_device() to
release the reference in the error path. So fix this by calling
put_device, then the name can be freed in kobject_cleanp().

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Zhu Wang <wangzhu9@huawei.com>
---
 drivers/input/serio/serio.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/input/serio/serio.c b/drivers/input/serio/serio.c
index 767fc9efb4a8..d3bb6ec91326 100644
--- a/drivers/input/serio/serio.c
+++ b/drivers/input/serio/serio.c
@@ -537,10 +537,12 @@ static void serio_add_port(struct serio *serio)
 		serio->start(serio);
 
 	error = device_add(&serio->dev);
-	if (error)
+	if (error) {
+		put_device(&serio->dev);
 		dev_err(&serio->dev,
 			"device_add() failed for %s (%s), error: %d\n",
 			serio->phys, serio->name, error);
+	}
 }
 
 /*
-- 
2.17.1