[v4 1/2] device-dax: fix memory and resource leak if hotplug fails

[Pavel Tatashin]

When add_memory() function fails, the resource and the memory should be
freed.

Fixes: c221c0b0308f ("device-dax: "Hotplug" persistent memory for use like normal RAM")

Signed-off-by: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Reviewed-by: Dave Hansen <dave.hansen@xxxxxxxxx>
---
 drivers/dax/kmem.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/dax/kmem.c b/drivers/dax/kmem.c
index a02318c6d28a..4c0131857133 100644
--- a/drivers/dax/kmem.c
+++ b/drivers/dax/kmem.c
@@ -66,8 +66,11 @@ int dev_dax_kmem_probe(struct device *dev)
 	new_res->name = dev_name(dev);
 
 	rc = add_memory(numa_node, new_res->start, resource_size(new_res));
-	if (rc)
+	if (rc) {
+		release_resource(new_res);
+		kfree(new_res);
 		return rc;
+	}
 
 	return 0;
 }
-- 
2.21.0