[PATCH] f2fs: correct cp_ver for compatibility to old image

[Chao Yu]

There is no CP_CRC_RECOVERY_FLAG tagged in checkpoint pack, calculate
cp_version as old format.

Signed-off-by: Chao Yu <yuch...@huawei.com>
---
 fs/f2fs/node.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 6c027b6833f4..0d46404ca769 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -2507,7 +2507,9 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
                f2fs_put_page(page, 1);
        }
 
-       cp_ver |= (cur_cp_crc(ckpt) << 32);
+       if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG))
+               cp_ver |= (cur_cp_crc(ckpt) << 32);
+
        if (cpu_to_le64(cp_ver) != *(__le64 *)nm_i->nat_bits) {
                disable_nat_bits(sbi, true);
                return 0;
-- 
2.8.2.295.g3f1c1d0