Re: [PATCH v2 08/13] PCI/portdrv: Simplify PCIe feature permission checking

[David Woodhouse <dwmw2@infradead.org>]

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On Fri, 2018-03-09 at 13:00 -0600, Bjorn Helgaas wrote:
> --- a/drivers/pci/probe.c
> +++ b/drivers/pci/probe.c
> @@ -540,6 +540,16 @@ struct pci_host_bridge *pci_alloc_host_bridge(size_t priv)
>         INIT_LIST_HEAD(&bridge->windows);
>         bridge->dev.release = pci_release_host_bridge_dev;
>  
> +       /*
> +        * We assume we can manage these PCIe features.  Some systems may
> +        * reserve these for use by the platform itself, e.g., an ACPI BIOS
> +        * may implement its own AER handling and use _OSC to prevent the
> +        * OS from interfering.
> +        */
> +       bridge->use_aer = 1;
> +       bridge->use_hotplug = 1;
> +       bridge->use_pme = 1;
> +
>         return bridge;
>  }
>  EXPORT_SYMBOL(pci_alloc_host_bridge);

Is there a good reason why you've done this only for
pci_alloc_host_bridge() and not also for devm_pci_alloc_host_bridge()? 

In fact, perhaps the devm version should actually call
pci_alloc_host_bridge() and then just override the release method?


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