From: NeilBrown <neilb@suse.de>
Date: Fri, 10 Apr 2015 03:19:04 +0000 (+1000)
Subject: md/raid0: fix bug with chunksize not a power of 2.
X-Git-Tag: omap-for-v4.1/fixes-rc1~201^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=47d68979cc968535cb87f3e5f2e6a3533ea48fbd;p=pandora-kernel.git

md/raid0: fix bug with chunksize not a power of 2.

Since commit 20d0189b1012a37d2533a87fb451f7852f2418d1
in v3.14-rc1 RAID0 has performed incorrect calculations
when the chunksize is not a power of 2.

This happens because "sector_div()" modifies its first argument, but
this wasn't taken into account in the patch.

So restore that first arg before re-using the variable.

Reported-by: Joe Landman <joe.landman@gmail.com>
Reported-by: Dave Chinner <david@fromorbit.com>
Fixes: 20d0189b1012a37d2533a87fb451f7852f2418d1
Cc: stable@vger.kernel.org (3.14 and later).
Signed-off-by: NeilBrown <neilb@suse.de>
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