From: David Daney <david.daney@xxxxxxxxxx>
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@xxxxxxx>
Signed-off-by: David Daney <david.daney@xxxxxxxxxx>
---
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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