From: NeilBrown <neilb@suse.de>
Date: Thu, 22 Dec 2011 22:56:55 +0000 (+1100)
Subject: md/linear: fix hot-add of devices to linear arrays.
X-Git-Tag: v3.2-rc7~8^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=09cd9270ea52e0f9851528e8ed028073f96b3c34;p=pandora-kernel.git

md/linear: fix hot-add of devices to linear arrays.

commit d70ed2e4fafdbef0800e73942482bb075c21578b
broke hot-add to a linear array.
After that commit, metadata if not written to devices until they
have been fully integrated into the array as determined by
saved_raid_disk.  That patch arranged to clear that field after
a recovery completed.

However for linear arrays, there is no recovery - the integration is
instantaneous.  So we need to explicitly clear the saved_raid_disk
field.

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