PCI: reserve bus range for SR-IOV device

Reserve the bus number range used by the Virtual Function when
pcibios_assign_all_busses() returns true.

Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 0471f6ea146..0ecdaea3915 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1085,6 +1085,9 @@ unsigned int __devinit pci_scan_child_bus(struct pci_bus *bus)
         for (devfn = 0; devfn < 0x100; devfn += 8)
                 pci_scan_slot(bus, devfn);
 
+        /* Reserve buses for SR-IOV capability. */
+        max += pci_iov_bus_range(bus);
+
         /*
          * After performing arch-dependent fixup of the bus, look behind
          * all PCI-to-PCI bridges on this bus.