Messages in this thread Patch in this message | | | From | David Daney <> | Subject | [PATCH v4 5/5] PCI: generic: Pass proper starting bus number to pci_scan_root_bus(). | Date | Fri, 2 Oct 2015 11:44:03 -0700 |
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From: David Daney <david.daney@cavium.com>
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.
Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: David Daney <david.daney@cavium.com> --- No change from v3.
drivers/pci/host/pci-host-generic.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/host/pci-host-generic.c b/drivers/pci/host/pci-host-generic.c index 5cce837..eb4b7c7 100644 --- a/drivers/pci/host/pci-host-generic.c +++ b/drivers/pci/host/pci-host-generic.c @@ -264,7 +264,8 @@ 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"); -- 1.9.1
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