From: NeilBrown <neilb@suse.de>
Date: Wed, 11 May 2011 04:26:20 +0000 (+1000)
Subject: md: reject a re-add request that cannot be honoured.
X-Git-Tag: v3.0-rc1~358^2~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bedd86b7773fd97f0d708cc0c371c8963ba7ba9a;p=pandora-kernel.git

md: reject a re-add request that cannot be honoured.

The 'add_new_disk' ioctl can be used to add a device either as a
spare, or as an active disk that just needs to be resynced based on
write-intent-bitmap information (re-add)

Currently if a re-add is requested but fails we add as a spare
instead.  This makes it impossible for user-space to check for
failure.

So change to require that a re-add attempt will either succeed or
completely fail.  User-space can then decide what to do next.

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