#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;
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)
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);
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: