.. | .. |
---|
6 | 6 | * Copyright (C) 2017 Christoph Hellwig. |
---|
7 | 7 | */ |
---|
8 | 8 | |
---|
9 | | -#include <linux/acpi.h> |
---|
10 | 9 | #include <linux/device.h> |
---|
11 | 10 | #include <linux/kernel.h> |
---|
12 | 11 | #include <linux/export.h> |
---|
13 | 12 | #include <linux/pci.h> |
---|
14 | | - |
---|
15 | | -static void pci_note_irq_problem(struct pci_dev *pdev, const char *reason) |
---|
16 | | -{ |
---|
17 | | - struct pci_dev *parent = to_pci_dev(pdev->dev.parent); |
---|
18 | | - |
---|
19 | | - pci_err(pdev, "Potentially misrouted IRQ (Bridge %s %04x:%04x)\n", |
---|
20 | | - dev_name(&parent->dev), parent->vendor, parent->device); |
---|
21 | | - pci_err(pdev, "%s\n", reason); |
---|
22 | | - pci_err(pdev, "Please report to linux-kernel@vger.kernel.org\n"); |
---|
23 | | - WARN_ON(1); |
---|
24 | | -} |
---|
25 | | - |
---|
26 | | -/** |
---|
27 | | - * pci_lost_interrupt - reports a lost PCI interrupt |
---|
28 | | - * @pdev: device whose interrupt is lost |
---|
29 | | - * |
---|
30 | | - * The primary function of this routine is to report a lost interrupt |
---|
31 | | - * in a standard way which users can recognise (instead of blaming the |
---|
32 | | - * driver). |
---|
33 | | - * |
---|
34 | | - * Returns: |
---|
35 | | - * a suggestion for fixing it (although the driver is not required to |
---|
36 | | - * act on this). |
---|
37 | | - */ |
---|
38 | | -enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *pdev) |
---|
39 | | -{ |
---|
40 | | - if (pdev->msi_enabled || pdev->msix_enabled) { |
---|
41 | | - enum pci_lost_interrupt_reason ret; |
---|
42 | | - |
---|
43 | | - if (pdev->msix_enabled) { |
---|
44 | | - pci_note_irq_problem(pdev, "MSIX routing failure"); |
---|
45 | | - ret = PCI_LOST_IRQ_DISABLE_MSIX; |
---|
46 | | - } else { |
---|
47 | | - pci_note_irq_problem(pdev, "MSI routing failure"); |
---|
48 | | - ret = PCI_LOST_IRQ_DISABLE_MSI; |
---|
49 | | - } |
---|
50 | | - return ret; |
---|
51 | | - } |
---|
52 | | -#ifdef CONFIG_ACPI |
---|
53 | | - if (!(acpi_disabled || acpi_noirq)) { |
---|
54 | | - pci_note_irq_problem(pdev, "Potential ACPI misrouting please reboot with acpi=noirq"); |
---|
55 | | - /* currently no way to fix acpi on the fly */ |
---|
56 | | - return PCI_LOST_IRQ_DISABLE_ACPI; |
---|
57 | | - } |
---|
58 | | -#endif |
---|
59 | | - pci_note_irq_problem(pdev, "unknown cause (not MSI or ACPI)"); |
---|
60 | | - return PCI_LOST_IRQ_NO_INFORMATION; |
---|
61 | | -} |
---|
62 | | -EXPORT_SYMBOL(pci_lost_interrupt); |
---|
63 | 13 | |
---|
64 | 14 | /** |
---|
65 | 15 | * pci_request_irq - allocate an interrupt line for a PCI device |
---|