From 3199aa6bc8766e17b8f60820c4f78d59c25fce0e Mon Sep 17 00:00:00 2001
From: "Han, Weidong" <weidong.han@intel.com>
Date: Thu, 26 Feb 2009 17:31:12 +0800
Subject: [PATCH] intel-iommu: fix PCI device detach from virtual machine

When assign a device behind conventional PCI bridge or PCIe to
PCI/PCI-x bridge to a domain, it must assign its bridge and may
also need to assign secondary interface to the same domain.

Dependent assignment is already there, but dependent
deassignment is missed when detach device from virtual machine.
This results in conventional PCI device assignment failure after
it has been assigned once. This patch addes dependent
deassignment, and fixes the issue.

Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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