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7#include <linux/acpi.h>
8#include <linux/device.h>
9#include <linux/kernel.h>
10#include <linux/pci.h>
11
12static void pci_note_irq_problem(struct pci_dev *pdev, const char *reason)
13{
14 struct pci_dev *parent = to_pci_dev(pdev->dev.parent);
15
16 dev_printk(KERN_ERR, &pdev->dev,
17 "Potentially misrouted IRQ (Bridge %s %04x:%04x)\n",
18 dev_name(&parent->dev), parent->vendor, parent->device);
19 dev_printk(KERN_ERR, &pdev->dev, "%s\n", reason);
20 dev_printk(KERN_ERR, &pdev->dev, "Please report to linux-kernel@vger.kernel.org\n");
21 WARN_ON(1);
22}
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35
36enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *pdev)
37{
38 if (pdev->msi_enabled || pdev->msix_enabled) {
39 enum pci_lost_interrupt_reason ret;
40
41 if (pdev->msix_enabled) {
42 pci_note_irq_problem(pdev, "MSIX routing failure");
43 ret = PCI_LOST_IRQ_DISABLE_MSIX;
44 } else {
45 pci_note_irq_problem(pdev, "MSI routing failure");
46 ret = PCI_LOST_IRQ_DISABLE_MSI;
47 }
48 return ret;
49 }
50#ifdef CONFIG_ACPI
51 if (!(acpi_disabled || acpi_noirq)) {
52 pci_note_irq_problem(pdev, "Potential ACPI misrouting please reboot with acpi=noirq");
53
54 return PCI_LOST_IRQ_DISABLE_ACPI;
55 }
56#endif
57 pci_note_irq_problem(pdev, "unknown cause (not MSI or ACPI)");
58 return PCI_LOST_IRQ_NO_INFORMATION;
59}
60EXPORT_SYMBOL(pci_lost_interrupt);
61