From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Daney Subject: [PATCH v3 5/6] PCI: generic: Pass proper starting bus number to pci_scan_root_bus(). Date: Tue, 22 Sep 2015 16:49:16 -0700 Message-ID: <1442965757-12925-6-git-send-email-ddaney.cavm@gmail.com> References: <1442965757-12925-1-git-send-email-ddaney.cavm@gmail.com> Return-path: In-Reply-To: <1442965757-12925-1-git-send-email-ddaney.cavm@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, Bjorn Helgaas , linux-pci@vger.kernel.org, Will Deacon , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, Marc Zyngier Cc: David Daney List-Id: devicetree@vger.kernel.org From: David Daney 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 Signed-off-by: David Daney --- No change from v1 or v2. drivers/pci/host/pci-host-generic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/host/pci-host-generic.c b/drivers/pci/host/pci-host-generic.c index 0a9c453..e364232 100644 --- a/drivers/pci/host/pci-host-generic.c +++ b/drivers/pci/host/pci-host-generic.c @@ -259,7 +259,7 @@ 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