From 10f4a4140b618ea89740dd76ff47aedbd5161f84 Mon Sep 17 00:00:00 2001
From: Yunlei He <heyunlei@huawei.com>
Date: Thu, 11 Jan 2018 14:19:32 +0800
Subject: [PATCH] f2fs: check node page again in write end io

Check node page again in write end io in case of
data corruption during inflght IO.

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/data.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 8148dff3732e..bbb6eb79351f 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -113,6 +113,10 @@ static void f2fs_write_end_io(struct bio *bio)
 			if (type == F2FS_WB_CP_DATA)
 				f2fs_stop_checkpoint(sbi, true);
 		}
+
+		f2fs_bug_on(sbi, page->mapping == NODE_MAPPING(sbi) &&
+					page->index != nid_of_node(page));
+
 		dec_page_count(sbi, type);
 		clear_cold_data(page);
 		end_page_writeback(page);