On Thu, Aug 30, 2012 at 10:42 PM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote:
>
> That's true. I think we should blindly probe for devices only when
> (1) the system does not have ACPI or (2) the DMI BIOS date is older
> than some date, e.g., 1 Jan 2013. For new systems with ACPI, we
> should only look at the host bridges described in ACPI.
if those buses do not get scanned, then it should be enough.
how about just removing pcibios_last_bus probing code?
diff --git a/arch/x86/pci/mmconfig-shared.c b/arch/x86/pci/mmconfig-shared.c
index 937bcec..3f3c460 100644
--- a/arch/x86/pci/mmconfig-shared.c
+++ b/arch/x86/pci/mmconfig-shared.c
@@ -616,16 +616,6 @@ static void __init __pci_mmcfg_init(int early)
if (list_empty(&pci_mmcfg_list))
return;
- if (pcibios_last_bus < 0) {
- const struct pci_mmcfg_region *cfg;
-
- list_for_each_entry(cfg, &pci_mmcfg_list, list) {
- if (cfg->segment)
- break;
- pcibios_last_bus = cfg->end_bus;
- }
- }
-
if (pci_mmcfg_arch_init())
pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;
else {
also Nehalem *EX* and Westmere *EX* does not support EDAC.
so if the user with Nehalem/Westmere Desktop version, want to use to
EDAC, they could just append
pci=last_bus=255 to get those buses scanned.
Yinghai
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