From: Mayank Rana quic_mrana@quicinc.com
[ Upstream commit 6168efbebace0db443185d4c6701ca8170a8788d ]
A PCI controller device, e.g., StarFive, is parent to PCI host bridge device. We must enable runtime PM of the controller before enabling runtime PM of the host bridge, which will happen in pci_host_probe(), to avoid this warning:
pcie-starfive 940000000.pcie: Enabling runtime PM for inactive device with active children
Fix this issue by enabling StarFive controller device's runtime PM before calling pci_host_probe() in plda_pcie_host_init().
Link: https://lore.kernel.org/r/20241111-runtime_pm-v7-1-9c164eefcd87@quicinc.com Tested-by: Marek Szyprowski m.szyprowski@samsung.com Signed-off-by: Mayank Rana quic_mrana@quicinc.com [bhelgaas: commit log] Signed-off-by: Bjorn Helgaas bhelgaas@google.com Reviewed-by: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/controller/plda/pcie-starfive.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/controller/plda/pcie-starfive.c b/drivers/pci/controller/plda/pcie-starfive.c index c9933ecf68338..0564fdce47c2a 100644 --- a/drivers/pci/controller/plda/pcie-starfive.c +++ b/drivers/pci/controller/plda/pcie-starfive.c @@ -404,6 +404,9 @@ static int starfive_pcie_probe(struct platform_device *pdev) if (ret) return ret;
+ pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); + plda->host_ops = &sf_host_ops; plda->num_events = PLDA_MAX_EVENT_NUM; /* mask doorbell event */ @@ -413,11 +416,12 @@ static int starfive_pcie_probe(struct platform_device *pdev) plda->events_bitmap <<= PLDA_NUM_DMA_EVENTS; ret = plda_pcie_host_init(&pcie->plda, &starfive_pcie_ops, &stf_pcie_event); - if (ret) + if (ret) { + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); return ret; + }
- pm_runtime_enable(&pdev->dev); - pm_runtime_get_sync(&pdev->dev); platform_set_drvdata(pdev, pcie);
return 0;