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    Subject[PATCHv4 18/28] PCI: mobiveil: add link up condition check
    Date
    From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

    Avoid to issue CFG transactions to link partner when the PCIe
    link is not up.

    Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
    ---
    V4:
    - Splited from the 17th patch

    drivers/pci/controller/mobiveil/pcie-mobiveil-host.c | 4 ++++
    1 file changed, 4 insertions(+)

    diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
    index 74a14f05115e..1ae82e790562 100644
    --- a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
    +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
    @@ -29,6 +29,10 @@ static bool mobiveil_pcie_valid_device(struct pci_bus *bus, unsigned int devfn)
    {
    struct mobiveil_pcie *pcie = bus->sysdata;

    + /* If there is no link, then there is no device */
    + if (bus->number > pcie->rp.root_bus_nr && !mobiveil_pcie_link_up(pcie))
    + return false;
    +
    /* Only one device down on each root port */
    if ((bus->number == pcie->rp.root_bus_nr) && (devfn > 0))
    return false;
    --
    2.17.1
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