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Subject[PATCHv5 16/20] 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>
---
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
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