Re: device_unregister() for PCI host bridge removal

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On Fri, Apr 26, 2013 at 2:25 PM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote:
> I'm trying to figure out where we call device_unregister() when
> removing a PCI host bridge.  I see the device_register() in the
> following path:
>
>     acpi_pci_root_add
>       pci_acpi_scan_root
>         pci_create_root_bus
>           bridge = pci_alloc_host_bridge
>           bridge->dev.release = pci_release_bus_bridge_dev
>           device_register(&bridge->dev)
>         pci_set_host_bridge_release(..., release_pci_root_info, ...)
>
> But I don't see any device_unregister() in the remove path:
>
>     acpi_pci_root_remove
>       pci_remove_root_bus
>         put_device(&host_bridge->dev)
>
>     pci_release_bus_bridge_dev
>       bridge->release_fn        # e.g., release_pci_root_info
>         release_pci_root_info
>           __release_pci_root_info
>             release_resource
>             free_pci_root_info_res
>             teardown_mcfg_map
>
> What am I missing?

pci_stop_root_bus
         /* stop the host bridge */
        device_del(&host_bridge->dev);
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