[PATCH v3] efifb: avoid reconfiguration of BAR that covers the framebuffer

[Yinghai Lu]

On Mon, Apr 10, 2017 at 06:29:27PM +0100, Ard Biesheuvel wrote:
>  /*
> @@ -208,8 +208,8 @@ struct pci_bus *pci_acpi_scan_root(struct
> acpi_pci_root *root)
>         if (!bus)
>                 return NULL;
> 
> -       pci_bus_size_bridges(bus);
> -       pci_bus_assign_resources(bus);
> +       pci_assign_unassigned_root_bus_resources(bus);
> +       pci_bus_claim_resources(bus);
> 
>         list_for_each_entry(child, &bus->children, node)
>                 pcie_bus_configure_settings(child);
>

looks like those two lines are reversed. you should use:
                pcibios_resource_survey_bus(bus);
                pci_assign_unassigned_root_bus_resources(bus);

please check x86 pcibios_resource_survey_bus() definition in
	arch/x86/pci/i386.c

but pci_bus_claim_resources() should work too.

Yinghai