mm/memory_hotplug.c: drop memory device reference after find_memory_block()
authorDavid Hildenbrand <david@redhat.com>
Fri, 26 Apr 2019 05:23:37 +0000 (22:23 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 26 Apr 2019 16:18:04 +0000 (09:18 -0700)
commit89c02e69fc5245f8a2f34b58b42d43a737af1a5e
tree106f7511c88d943bfd8abc0a42468982a46b8c11
parent8113a85f872003a9f5c58f9f143054b0d8ec73a5
mm/memory_hotplug.c: drop memory device reference after find_memory_block()

Right now we are using find_memory_block() to get the node id for the
pfn range to online.  We are missing to drop a reference to the memory
block device.  While the device still gets unregistered via
device_unregister(), resulting in no user visible problem, the device is
never released via device_release(), resulting in a memory leak.  Fix
that by properly using a put_device().

Link: http://lkml.kernel.org/r/20190411110955.1430-1-david@redhat.com
Fixes: d0dc12e86b31 ("mm/memory_hotplug: optimize memory hotplug")
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Pankaj Gupta <pagupta@redhat.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Qian Cai <cai@lca.pw>
Cc: Arun KS <arunks@codeaurora.org>
Cc: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/memory_hotplug.c