PCI: Mark invalid BARs as unassigned
If a BAR is not inside any upstream bridge window, or if it conflicts with another resource, mark it as IORESOURCE_UNSET so we don't try to use it. We may be able to assign a different address for it. Signed-off-by: NBjorn Helgaas <bhelgaas@google.com> Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
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