From: Zhao Lei <zhaolei@cn.fujitsu.com>
Date: Tue, 20 Jan 2015 07:11:40 +0000 (+0800)
Subject: Btrfs: Separate finding-right-mirror and writing-to-target's process in scrub_handle_... 
X-Git-Tag: fixes-v4.0-rc1~50^2~31
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8d6738c1bd74a27ff6a5043c5211c7bff7745420;p=pandora-kernel.git

Btrfs: Separate finding-right-mirror and writing-to-target's process in scrub_handle_errored_block()

In corrent code, code of finding-right-mirror and writing-to-target
are mixed in logic, if we find a right mirror but failed in writing
to target, it will treat as "hadn't found right block", and fill the
target with sblock_bad.

Actually, "failed in writing to target" does not mean "source
block is wrong", this patch separate above two condition in logic,
and do some cleanup to make code clean.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
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