From: NeilBrown <neilb@suse.de>
Date: Thu, 17 May 2012 00:08:45 +0000 (+1000)
Subject: md/raid10: set dev_sectors properly when resizing devices in array.
X-Git-Tag: v3.4~19^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6508fdbf40a92fd7c19d32780ea33ce8e8362b93;p=pandora-kernel.git

md/raid10: set dev_sectors properly when resizing devices in array.

raid10 stores dev_sectors in 'conf' separately from the one in
'mddev' because it can have a very significant effect on block
addressing and so need to be updated carefully.

However raid10_resize isn't updating it at all!

To update it correctly, we need to make sure it is a proper
multiple of the chunksize taking various details of the layout
in to account.
This calculation is currently done in setup_conf.   So split it
out from there and call it from raid10_resize as well.
Then set conf->dev_sectors properly.

Signed-off-by: NeilBrown <neilb@suse.de>
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