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For now, the hotplug handler is not called for devices that are being cold plugged. The hotplug handler is setup when the machine initialization is fully done. Only bridges that were cold plugged are considered. Set the hotplug handler for the root piix bus directly when realizing. Overwrite the hotplug handler of bridges when coldplugging them. This will now make sure that the ACPI PCI hotplug handler is also called for cold plugged devices (also on bridges) but not for bridges that were hotplugged (keeping the current behavior). Reviewed-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>