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

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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
decrease the reference count in the error path. So fix this by calling
put_device, then the name can be freed in kobject_cleanp().

Fixes: ee959b00c335 ("SCSI: convert struct class_device to struct device")
Signed-off-by: Zhu Wang <wangzhu9@xxxxxxxxxx>
---
 drivers/scsi/raid_class.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/raid_class.c b/drivers/scsi/raid_class.c
index 898a0bdf8df6..2ba4da8d822d 100644
--- a/drivers/scsi/raid_class.c
+++ b/drivers/scsi/raid_class.c
@@ -242,8 +242,10 @@ int raid_component_add(struct raid_template *r,struct device *raid_dev,
 	list_add_tail(&rc->node, &rd->component_list);
 	rc->dev.class = &raid_class.class;
 	err = device_add(&rc->dev);
-	if (err)
+	if (err) {
+		put_device(&rc->dev);
 		goto err_out;
+	}
 
 	return 0;
 
-- 
2.17.1




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