From e39cb8a3aa988a74433a3f26443b454cca033651 Mon Sep 17 00:00:00 2001
From: Joerg Roedel <jroedel@suse.de>
Date: Thu, 28 May 2015 18:41:31 +0200
Subject: [PATCH] iommu: Make sure a device is always attached to a domain

Make use of the default domain and re-attach a device to it
when it is detached from another domain. Also enforce that a
device has to be in the default domain before it can be
attached to a different domain.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
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