[PATCH 5.9 244/252] blk-cgroup: fix a hd_struct leak in blkcg_fill_root_iostats

[Greg Kroah-Hartman]

From: Christoph Hellwig <h...@lst.de>

commit b7131ee0bac5e5df73e4098e77bbddb3a31d06ff upstream.

disk_get_part needs to be paired with a disk_put_part.

Cc: sta...@vger.kernel.org
Fixes: ef45fe470e1 ("blk-cgroup: show global disk stats in root cgroup io.stat")
Signed-off-by: Christoph Hellwig <h...@lst.de>
Signed-off-by: Jens Axboe <ax...@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 block/blk-cgroup.c |    1 +
 1 file changed, 1 insertion(+)

--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -840,6 +840,7 @@ static void blkcg_fill_root_iostats(void
                        blkg_iostat_set(&blkg->iostat.cur, &tmp);
                        u64_stats_update_end(&blkg->iostat.sync);
                }
+               disk_put_part(part);
        }
 }