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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>
This commit is contained in:
Gavin Shan 2016-05-20 16:41:36 +10:00 committed by Michael Ellerman
parent c5f7700bbd
commit 7415c14c56
1 changed files with 6 additions and 2 deletions
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8
arch/powerpc/kernel/pci-common.c
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@ -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);