From: NeilBrown <neilb@suse.de>
Date: Fri, 7 May 2010 22:20:17 +0000 (+1000)
Subject: md: Fix read balancing in RAID1 and RAID10 on drives > 2TB
X-Git-Tag: v2.6.27.48~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f2a41e6807357c237ec2bbd61e79cb1558e48b8a;p=pandora-kernel.git

md: Fix read balancing in RAID1 and RAID10 on drives > 2TB

commit af3a2cd6b8a479345786e7fe5e199ad2f6240e56 upstream.

read_balance uses a "unsigned long" for a sector number which
will get truncated beyond 2TB.
This will cause read-balancing to be non-optimal, and can cause
data to be read from the 'wrong' branch during a resync.  This has a
very small chance of returning wrong data.

Reported-by: Jordan Russell <jr-list-2010@quo.to>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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