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PCI: generic: Pass starting bus number to pci_scan_root_bus()

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If the bus is being configured with a bus-range that does not start at
zero, pass that starting bus number to pci_scan_root_bus().  Passing the
incorrect value of zero causes attempted config accesses outside of the
supported range, which cascades to an OOPs spew and eventual kernel panic.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
David Daney 2015-10-08 10:24:41 -05:00 committed by Bjorn Helgaas
parent 9a28033753
commit 47ddb94902
1 changed files with 2 additions and 1 deletions
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3
drivers/pci/host/pci-host-generic.c
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@ -251,7 +251,8 @@ static int gen_pci_probe(struct platform_device *pdev)
if (!pci_has_flag(PCI_PROBE_ONLY))
pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS);
bus = pci_scan_root_bus(dev, 0,
bus = pci_scan_root_bus(dev, pci->cfg.bus_range->start,
&pci->cfg.ops->ops, pci, &pci->resources);
if (!bus) {
dev_err(dev, "Scanning rootbus failed");