If the storage gives a corrupted node block due to short power failure and
reset, f2fs stops the entire operations by setting the checkpoint failure flag.
Let's give more chances to live by re-issuing IOs for a while in such critical
path.
Cc: stable@xxxxxxxxxxxxxxx
Suggested-by: Randall Huang <huangrandall@xxxxxxxxxx>
Suggested-by: Chao Yu <chao@xxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>