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

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[ Upstream commit 47d68979cc ]

Since commit 20d0189b10
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: 20d0189b10
Cc: stable@vger.kernel.org (3.14 and later).
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

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NeilBrown 2015-04-10 13:19:04 +10:00 • committed by Sasha Levin

parent f364a04fb4

commit d2c861b700

1 changed files with 2 additions and 1 deletions

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drivers/md/raid0.c

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