If device_add() fails, cleanup the cdev. Otherwise, we leak a kobj_map()
with a stale device number.
Fixes: ba09c01d2fa8 ("dax: convert to the cdev api")
Cc: <stable@xxxxxxxxxxxxxxx>
Cc: Logan Gunthorpe <logang@xxxxxxxxxxxx>
Reported-by: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
drivers/dax/dax.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/dax/dax.c b/drivers/dax/dax.c
index ed758b74ddf0..0f8008dd0b0c 100644
--- a/drivers/dax/dax.c
+++ b/drivers/dax/dax.c
@@ -724,6 +724,7 @@ struct dax_dev *devm_create_dax_dev(struct dax_region *dax_region,
dev_set_name(dev, "dax%d.%d", dax_region->id, dax_dev->id);
rc = device_add(dev);
if (rc) {
+ cdev_del(&dax_dev->cdev);
put_device(dev);
return ERR_PTR(rc);
}