On Mon, 2017-08-14 at 22:15 -0700, David Miller wrote: > From: Ding Tianhong <dingtianhong@xxxxxxxxxx> > Date: Tue, 15 Aug 2017 11:23:22 +0800 > > > Some devices have problems with Transaction Layer Packets with the Relaxed > > Ordering Attribute set. This patch set adds a new PCIe Device Flag, > > PCI_DEV_FLAGS_NO_RELAXED_ORDERING, a set of PCI Quirks to catch some known > > devices with Relaxed Ordering issues, and a use of this new flag by the > > cxgb4 driver to avoid using Relaxed Ordering with problematic Root Complex > > Ports. > ... > > Series applied, thanks. I got a NULL deref in pci_find_pcie_root_port() Was it expected ? This local hack seems to fix the issue. diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index af0cc3456dc1b48b1325c06c5edd2ca8cc22a640..cfd8eb5a3d0ba8347d44952ffab28d9c761044d3 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -522,7 +522,7 @@ struct pci_dev *pci_find_pcie_root_port(struct pci_dev *dev) bridge = pci_upstream_bridge(bridge); } - if (pci_pcie_type(highest_pcie_bridge) != PCI_EXP_TYPE_ROOT_PORT) + if (highest_pcie_bridge && pci_pcie_type(highest_pcie_bridge) != PCI_EXP_TYPE_ROOT_PORT) return NULL; return highest_pcie_bridge;