powerpc/pci: Update bridge windows on PCI plug

On the PCI plugging event, PCI slot's subordinate devices are
scanned and their (IO and MMIO) resources are assigned. Platform
dependent resources (PE#, IO/MMIO/DMA windows) are allocated or
created on updating windows of the slot's upstream bridge.

This updates the windows of the hot plugged slot's upstream bridge
in pcibios_finish_adding_to_bus() so that the platform resources
(PE#, IO/MMIO/DMA segments) are allocated or created accordingly.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 40df3a551b1404ece4a85f0c3e533e30484b8561..be9e51516ac0467eaa9c09d35b91a6abc086b84f 100644 (file)
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -1444,8 +1444,12 @@ void pcibios_finish_adding_to_bus(struct pci_bus *bus)
        /* Allocate bus and devices resources */
        pcibios_allocate_bus_resources(bus);
        pcibios_claim_one_bus(bus);
-       if (!pci_has_flag(PCI_PROBE_ONLY))
-               pci_assign_unassigned_bus_resources(bus);
+       if (!pci_has_flag(PCI_PROBE_ONLY)) {
+               if (bus->self)
+                       pci_assign_unassigned_bridge_resources(bus->self);
+               else
+                       pci_assign_unassigned_bus_resources(bus);
+       }
 
        /* Fixup EEH */
        eeh_add_device_tree_late(bus);