[PATCHv5 16/20] PCI: mobiveil: Add link up condition check

[Z.q. Hou]

From: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx>

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

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx>
---
V5:
 - Corrected the subject.

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

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index 621852078caf..1ee3ea2570c0 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -283,6 +283,10 @@ 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->root_bus_nr && !mobiveil_pcie_link_up(pcie))
+		return false;
+
 	/* Only one device down on each root port */
 	if ((bus->number == pcie->root_bus_nr) && (devfn > 0))
 		return false;
-- 
2.17.1