diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 9e24e11c88a8c7a9dc523ab57f6f17601c3cc1dc..7546d90c6ed3474aeb041ba9a2faa0ac168f7ac4 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -902,6 +902,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
 	 */
 	mem = find_memory_block(__pfn_to_section(pfn));
 	nid = mem->nid;
+	put_device(&mem->dev);
 
 	/* associate pfn range with the zone */
 	zone = move_pfn_range(online_type, nid, pfn, nr_pages);