From: Bjorn Helgaas <bhelgaas@google.com>
Date: Fri, 28 Oct 2011 22:25:50 +0000 (-0600)
Subject: PCI: add pci_scan_root_bus() that accepts resource list
X-Git-Tag: v3.3-rc1~101^2~40
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a2ebb827958a4ab3577443f89037f229683c644a;p=pandora-kernel.git

PCI: add pci_scan_root_bus() that accepts resource list

"Early" and "header" quirks often use incorrect bus resources because they
see the default resources assigned by pci_create_bus(), before the
architecture fixes them up (typically in pcibios_fixup_bus()).  Regions
reserved by these quirks end up with the wrong parents.

Here's the standard path for scanning a PCI root bus:

  pci_scan_bus or pci_scan_bus_parented
    pci_create_bus                     <-- A create with default resources
    pci_scan_child_bus
      pci_scan_slot
        pci_scan_single_device
          pci_scan_device
            pci_setup_device
              pci_fixup_device(early)  <-- B
          pci_device_add
            pci_fixup_device(header)   <-- C
      pcibios_fixup_bus                <-- D fill in correct resources

Early and header quirks at B and C use the default (incorrect) root bus
resources rather than those filled in at D.

This patch adds a new pci_scan_root_bus() function that sets the bus
resources correctly from a supplied list of resources.

I intend to remove pci_scan_bus() and pci_scan_bus_parented() after
fixing all callers.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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