From: Miao Xie <miaox@cn.fujitsu.com>
Date: Fri, 12 Sep 2014 10:44:02 +0000 (+0800)
Subject: Btrfs: Set real mirror number for read operation on RAID0/5/6
X-Git-Tag: fixes-against-v3.18-rc2~120^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=28e1cc7d1baf8038ae4ad4681c8f3dc94fcd7c00;p=pandora-kernel.git

Btrfs: Set real mirror number for read operation on RAID0/5/6

We need real mirror number for RAID0/5/6 when reading data, or if read error
happens, we would pass 0 as the number of the mirror on which the io error
happens. It is wrong and would cause the filesystem read the data from the
corrupted mirror again.

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