On Sun, Sep 2, 2012 at 3:50 PM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote:
> So could use it with hot-added root bus.
>
> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
> ---
> arch/x86/pci/i386.c | 58 ++++++++++++++++++++++++++++++++++++---------------
> 1 files changed, 41 insertions(+), 17 deletions(-)
>
> diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
> index 84696ed..4fdf0b2 100644
> --- a/arch/x86/pci/i386.c
> +++ b/arch/x86/pci/i386.c
> @@ -298,27 +298,51 @@ static void __init pcibios_allocate_resources(struct pci_bus *bus, int pass)
> }
> }
>
> -static int __init pcibios_assign_resources(void)
> +static void __init pcibios_allocate_dev_rom_resource(struct pci_dev *dev)
> {
> - struct pci_dev *dev = NULL;
> struct resource *r;
>
> - if (!(pci_probe & PCI_ASSIGN_ROMS)) {
> - /*
> - * Try to use BIOS settings for ROMs, otherwise let
> - * pci_assign_unassigned_resources() allocate the new
> - * addresses.
> - */
> - for_each_pci_dev(dev) {
> - r = &dev->resource[PCI_ROM_RESOURCE];
> - if (!r->flags || !r->start)
> - continue;
> - if (pci_claim_resource(dev, PCI_ROM_RESOURCE) < 0) {
> - r->end -= r->start;
> - r->start = 0;
> - }
> - }
> + /*
> + * Try to use BIOS settings for ROMs, otherwise let
> + * pci_assign_unassigned_resources() allocate the new
> + * addresses.
> + */
> + r = &dev->resource[PCI_ROM_RESOURCE];
> + if (!r->flags || !r->start)
> + return;
> +
> + if (pci_claim_resource(dev, PCI_ROM_RESOURCE) < 0) {
> + r->end -= r->start;
> + r->start = 0;
> }
> +}
> +static void __init __pcibios_allocate_rom_resources(struct pci_bus *bus)
> +{
> + struct pci_dev *dev;
> + struct pci_bus *child;
> +
> + list_for_each_entry(dev, &bus->devices, bus_list) {
> + pcibios_allocate_dev_rom_resource(dev);
> +
> + child = dev->subordinate;
> + if (child)
> + __pcibios_allocate_rom_resources(child);
I really dislike the "__" prefix on the function names. It seems
pointless to add another function and the "__" when all you need is a
test of PCI_ASSIGN_ROMS. Also, it makes the structure of
__pcibios_allocate_rom_resources() different from
pcibios_allocate_resources() when they should be exactly the same.
What if you made pcibios_assign_resources() look like this:
if (!!(pci_probe & PCI_ASSIGN_ROMS)) {
list_for_each_entry(bus, &pci_root_buses, node)
pcibios_allocate_rom_resources(bus);
}
Then I don't think you'd need the extra function.
> + }
> +}
> +static void __init pcibios_allocate_rom_resources(struct pci_bus *bus)
> +{
> + if (pci_probe & PCI_ASSIGN_ROMS)
> + return;
> +
> + __pcibios_allocate_rom_resources(bus);
> +}
> +
> +static int __init pcibios_assign_resources(void)
> +{
> + struct pci_bus *bus;
> +
> + list_for_each_entry(bus, &pci_root_buses, node)
> + pcibios_allocate_rom_resources(bus);
>
> pci_assign_unassigned_resources();
> pcibios_fw_addr_list_del();
> --
> 1.7.7
>
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