Messages in this thread Patch in this message | | | From | "Z.q. Hou" <> | Subject | [PATCHv4 18/28] PCI: mobiveil: add link up condition check | Date | Mon, 11 Mar 2019 09:32:22 +0000 |
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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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