From aaae917990623a6ca6b638557056606a1ae4a8d6 Mon Sep 17 00:00:00 2001 From: Ali Tariq Date: Sat, 18 Jul 2026 20:33:51 +0500 Subject: [PATCH] PCI: starfive: Fix unchecked pm_runtime_get_sync() in probe pm_runtime_get_sync() is called in starfive_pcie_probe() without checking its return value. If runtime resume fails, the driver proceeds to configure PCIe hardware through regmap_update_bits(), enable clocks and resets, and power on the PHY, even though the device may not actually be powered. pm_runtime_get_sync() also increments the usage counter even when resume fails, which would leave the counter unbalanced if this error path were later handled without additional cleanup. Switch to pm_runtime_resume_and_get(), which balances the usage counter internally on failure, and bail out of probe before any hardware is touched if resume does not succeed. Tested on StarFive VisionFive 2 v1.2A board. Fixes: 6168efbebace ("PCI: starfive: Enable controller runtime PM before probing host bridge") Signed-off-by: Ali Tariq Signed-off-by: Manivannan Sadhasivam Link: https://patch.msgid.link/20260718153352.661930-1-alitariq45892@gmail.com --- drivers/pci/controller/plda/pcie-starfive.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/plda/pcie-starfive.c b/drivers/pci/controller/plda/pcie-starfive.c index 0ca39f3fa1d4..fab44054a5de 100644 --- a/drivers/pci/controller/plda/pcie-starfive.c +++ b/drivers/pci/controller/plda/pcie-starfive.c @@ -419,7 +419,11 @@ static int starfive_pcie_probe(struct platform_device *pdev) return ret; pm_runtime_enable(&pdev->dev); - pm_runtime_get_sync(&pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); + if (ret < 0) { + pm_runtime_disable(&pdev->dev); + return dev_err_probe(dev, ret, "failed to resume device\n"); + } plda->host_ops = &sf_host_ops; plda->num_events = PLDA_MAX_EVENT_NUM;