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    Subject[PATCH net] PCI: fix the return value for the pci_find_pcie_root_port()
    Date
    The pci_find_pcie_root_port() would return NULL if the given
    dev is already a Root Port, it looks like unfriendly to the
    PCIe Root Port device, Thierry and Bjorn suggest to let this
    function return the given dev under this circumstances.

    Fixes: 0e405232871d6 ("PCI: fix oops when try to find Root Port for a PCI device")
    Suggested-by: Thierry Reding <thierry.reding@gmail.com>
    Suggested-by: Bjorn Helgaas <helgaas@kernel.org>
    Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
    Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
    ---
    drivers/pci/pci.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
    index 7e2022f..352bb53 100644
    --- a/drivers/pci/pci.c
    +++ b/drivers/pci/pci.c
    @@ -514,7 +514,7 @@ struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res)
    */
    struct pci_dev *pci_find_pcie_root_port(struct pci_dev *dev)
    {
    - struct pci_dev *bridge, *highest_pcie_bridge = NULL;
    + struct pci_dev *bridge, *highest_pcie_bridge = dev;

    bridge = pci_upstream_bridge(dev);
    while (bridge && pci_is_pcie(bridge)) {
    --
    1.8.3.1

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