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[V1,4/5] PCI: tegra: Don't allow suspend when Tegra PCIe is in EP mode

Message ID 20210527074614.49149-7-omp@nvidia.com (mailing list archive)
State Superseded
Delegated to: Lorenzo Pieralisi
Headers show
Series Update pcie-tegra194 driver | expand

Commit Message

Om Prakash Singh May 27, 2021, 7:46 a.m. UTC 
When Tegra PCIe is in endpoint mode it should be available for root port.
PCIe link up by root port fails if it is in suspend state. So, don't allow
Tegra to suspend when endpoint mode is enabled.

Signed-off-by: Om Prakash Singh <omp@nvidia.com>
---
 drivers/pci/controller/dwc/pcie-tegra194.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index ae62fdc840e6..93c89f2084a7 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -2276,6 +2276,11 @@  static int tegra_pcie_dw_suspend_late(struct device *dev)
 	struct tegra_pcie_dw *pcie = dev_get_drvdata(dev);
 	u32 val;
 
+	if (pcie->mode == DW_PCIE_EP_TYPE) {
+		dev_err(dev, "Tegra PCIe is in EP mode, suspend not allowed");
+		return -EPERM;
+	}
+
 	if (!pcie->link_state)
 		return 0;