Merge tag 'pci-v4.11-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...

[mirror_ubuntu-bionic-kernel.git] / drivers / pci / probe.c

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 3abc94212197f65c136e2fd240f03dd1dce8bba7..dfc9a27941418976c0fadee7e6628531fbb47613 100644 (file)
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1169,6 +1169,7 @@ void set_pcie_port_type(struct pci_dev *pdev)
        pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
        if (!pos)
                return;
+
        pdev->pcie_cap = pos;
        pci_read_config_word(pdev, pos + PCI_EXP_FLAGS, &reg16);
        pdev->pcie_flags_reg = reg16;
@@ -1176,13 +1177,14 @@ void set_pcie_port_type(struct pci_dev *pdev)
        pdev->pcie_mpss = reg16 & PCI_EXP_DEVCAP_PAYLOAD;
 
        /*
-        * A Root Port is always the upstream end of a Link.  No PCIe
-        * component has two Links.  Two Links are connected by a Switch
-        * that has a Port on each Link and internal logic to connect the
-        * two Ports.
+        * A Root Port or a PCI-to-PCIe bridge is always the upstream end
+        * of a Link.  No PCIe component has two Links.  Two Links are
+        * connected by a Switch that has a Port on each Link and internal
+        * logic to connect the two Ports.
         */
        type = pci_pcie_type(pdev);
-       if (type == PCI_EXP_TYPE_ROOT_PORT)
+       if (type == PCI_EXP_TYPE_ROOT_PORT ||
+           type == PCI_EXP_TYPE_PCIE_BRIDGE)
                pdev->has_secondary_link = 1;
        else if (type == PCI_EXP_TYPE_UPSTREAM ||
                 type == PCI_EXP_TYPE_DOWNSTREAM) {