From f0658708e8636f64458fe69e0037700ab57124e1 Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada Date: Mon, 28 Aug 2023 17:23:42 -0700 Subject: thermal: int340x: processor_thermal: Use non MSI interrupts by default There are issues in using MSI interrupts for processor thermal device. The support is not consistent across generations. But the legacy PCI interrupts work on all current generations. Hence always use legacy PCI interrupts by default, instead of MSI. Add a module param to use of MSI, so that MSI can be still used. Signed-off-by: Srinivas Pandruvada Signed-off-by: Rafael J. Wysocki --- .../int340x_thermal/processor_thermal_device_pci.c | 30 +++++++++++++++------- 1 file changed, 21 insertions(+), 9 deletions(-) (limited to 'drivers/thermal/intel') diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c index 314a726f35c7..f736688abe9b 100644 --- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c +++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c @@ -15,6 +15,11 @@ #define DRV_NAME "proc_thermal_pci" +static bool use_msi; +module_param(use_msi, bool, 0644); +MODULE_PARM_DESC(use_msi, + "Use PCI MSI based interrupts for processor thermal device."); + struct proc_thermal_pci { struct pci_dev *pdev; struct proc_thermal_device *proc_priv; @@ -203,6 +208,7 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_ struct proc_thermal_device *proc_priv; struct proc_thermal_pci *pci_info; int irq_flag = 0, irq, ret; + bool msi_irq = false; proc_priv = devm_kzalloc(&pdev->dev, sizeof(*proc_priv), GFP_KERNEL); if (!proc_priv) @@ -248,16 +254,21 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_ goto err_ret_mmio; } - /* request and enable interrupt */ - ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES); - if (ret < 0) { - dev_err(&pdev->dev, "Failed to allocate vectors!\n"); - goto err_ret_tzone; - } - if (!pdev->msi_enabled && !pdev->msix_enabled) + if (use_msi && (pdev->msi_enabled || pdev->msix_enabled)) { + /* request and enable interrupt */ + ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to allocate vectors!\n"); + goto err_ret_tzone; + } + + irq = pci_irq_vector(pdev, 0); + msi_irq = true; + } else { irq_flag = IRQF_SHARED; + irq = pdev->irq; + } - irq = pci_irq_vector(pdev, 0); ret = devm_request_threaded_irq(&pdev->dev, irq, proc_thermal_irq_handler, NULL, irq_flag, KBUILD_MODNAME, pci_info); @@ -273,7 +284,8 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_ return 0; err_free_vectors: - pci_free_irq_vectors(pdev); + if (msi_irq) + pci_free_irq_vectors(pdev); err_ret_tzone: thermal_zone_device_unregister(pci_info->tzone); err_ret_mmio: -- cgit v1.2.3