tree a10573f48736ba5b5e89fdc6f4f7844fae2ce133
parent 16f889499a5214ebe038f8bd00f4c0094ed0ed75
author Shaohua Li <shli@fb.com> 1477606933 -0700
committer Shaohua Li <shli@fb.com> 1477717443 -0700

raid5-cache: correct condition for empty metadata write

As long as we recover one metadata block, we should write the empty metadata
write. The original code could make recovery corrupted if only one meta is
valid.

Reported-by: Zhengyuan Liu <liuzhengyuan@kylinos.cn>
Signed-off-by: Shaohua Li <shli@fb.com>