From: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
PCIe host controller drivers are supposed to properly remove the
endpoint drivers and release the resources during host shutdown/reboot
to avoid issues like smmu errors, NOC errors, etc.
So, stop and remove the root bus and its associated devices and release
its resources during system shutdown to ensure a clean shutdown/reboot.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@xxxxxxxxxxxxxxxx>
---
drivers/pci/controller/dwc/pcie-qcom.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index e4d3366ead1f9198693e6f9da4ae1dc40a3a0519..926811a0e63eb3663c1f41dc598659993546d832 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1754,6 +1754,16 @@ static int qcom_pcie_probe(struct platform_device *pdev)
return ret;
}
+static void qcom_pcie_shutdown(struct platform_device *pdev)
+{
+ struct qcom_pcie *pcie = platform_get_drvdata(pdev);
+
+ dw_pcie_host_deinit(&pcie->pci->pp);
+ phy_exit(pcie->phy);
+ pm_runtime_put(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+}
+
static int qcom_pcie_suspend_noirq(struct device *dev)
{
struct qcom_pcie *pcie = dev_get_drvdata(dev);
@@ -1890,5 +1900,6 @@ static struct platform_driver qcom_pcie_driver = {
.pm = &qcom_pcie_pm_ops,
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
+ .shutdown = qcom_pcie_shutdown,
};
builtin_platform_driver(qcom_pcie_driver);
---
base-commit: b3ee1e4609512dfff642a96b34d7e5dfcdc92d05
change-id: 20250321-shutdown-9237fad7374c
Best regards,
--
Krishna Chaitanya Chundru <krishna.chundru@xxxxxxxxxxxxxxxx>
