[Bug 88671] New: BUG at drivers/pci/ats.c:62! the second time booting a kvm guest with pci passthrough

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https://bugzilla.kernel.org/show_bug.cgi?id=88671

            Bug ID: 88671
           Summary: BUG at drivers/pci/ats.c:62! the second time booting a
                    kvm guest with pci passthrough
           Product: Virtualization
           Version: unspecified
    Kernel Version: 3.17.3
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: kvm
          Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx
          Reporter: tstellar@xxxxxxxxx
        Regression: No

Created attachment 158381
  --> https://bugzilla.kernel.org/attachment.cgi?id=158381&action=edit
lspci

I'm running into this bug while trying to use pci passthrough of an AMD BONAIRE
XT (Radeon HD 7790)

Steps to reproduce:

1. virsh start vm
2. virsh destroy vm
3. virsh start vm

This bug only appears after starting the vm for the second time.  The first
time the vm boots normally and passthrough works as expected.

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