From: David Daney Date: Thu, 8 Oct 2015 15:24:41 +0000 (-0500) Subject: PCI: generic: Pass starting bus number to pci_scan_root_bus() X-Git-Tag: firefly_0821_release~176^2~768^2~2^4~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=47ddb949029f9517a773e67b0e5eaf80ef596dad;p=firefly-linux-kernel-4.4.55.git PCI: generic: Pass starting bus number to pci_scan_root_bus() 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 Signed-off-by: Bjorn Helgaas Acked-by: Will Deacon --- diff --git a/drivers/pci/host/pci-host-generic.c b/drivers/pci/host/pci-host-generic.c index 2533e8da136d..895c0e39ca3b 100644 --- a/drivers/pci/host/pci-host-generic.c +++ b/drivers/pci/host/pci-host-generic.c @@ -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");