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x86/PCI: Drop pcibios_scan_root() check for bus already scanned 

The PCI core checks to see whether we've already scanned a bus, so we don't
need to do it in pcibios_scan_root().  Here's where it happens in the core:

  pcibios_scan_root
    pci_scan_bus_on_node
      pci_scan_root_bus
        pci_create_root_bus
	  b2 = pci_find_bus(pci_domain_nr(b), bus)
	  if (b2)
	    goto err_out;    # already scanned this bus

This removes the check from pcibios_scan_root().

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Bjorn Helgaas 2014-01-28 16:28:21 -07:00
parent 38dbfb59d1
commit f19e84824a
1 changed files with 0 additions and 9 deletions
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9
arch/x86/pci/common.c
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@ -458,15 +458,6 @@ void __init dmi_check_pciprobe(void)
struct pci_bus *pcibios_scan_root(int busnum) struct pci_bus *pcibios_scan_root(int busnum)
{ {
struct pci_bus *bus = NULL;
while ((bus = pci_find_next_bus(bus)) != NULL) {
if (bus->number == busnum) {
/* Already scanned */
return bus;
}
}
return pci_scan_bus_on_node(busnum, &pci_root_ops, return pci_scan_bus_on_node(busnum, &pci_root_ops,
get_mp_bus_to_node(busnum)); get_mp_bus_to_node(busnum));
} }