https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 13d428afc007fcfcd6deeb215618f54cf9c0cae6 authored by Linus Torvalds on 20 November 2008, 23:19:22 UTC
Linux 2.6.28-rc6
Linux 2.6.28-rc6
Tip revision: 13d428a
irq.c
/*
* PCI IRQ failure handing code
*
* Copyright (c) 2008 James Bottomley <James.Bottomley@HansenPartnership.com>
*/
#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/pci.h>
static void pci_note_irq_problem(struct pci_dev *pdev, const char *reason)
{
struct pci_dev *parent = to_pci_dev(pdev->dev.parent);
dev_printk(KERN_ERR, &pdev->dev,
"Potentially misrouted IRQ (Bridge %s %04x:%04x)\n",
parent->dev.bus_id, parent->vendor, parent->device);
dev_printk(KERN_ERR, &pdev->dev, "%s\n", reason);
dev_printk(KERN_ERR, &pdev->dev, "Please report to linux-kernel@vger.kernel.org\n");
WARN_ON(1);
}
/**
* pci_lost_interrupt - reports a lost PCI interrupt
* @pdev: device whose interrupt is lost
*
* The primary function of this routine is to report a lost interrupt
* in a standard way which users can recognise (instead of blaming the
* driver).
*
* Returns:
* a suggestion for fixing it (although the driver is not required to
* act on this).
*/
enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *pdev)
{
if (pdev->msi_enabled || pdev->msix_enabled) {
enum pci_lost_interrupt_reason ret;
if (pdev->msix_enabled) {
pci_note_irq_problem(pdev, "MSIX routing failure");
ret = PCI_LOST_IRQ_DISABLE_MSIX;
} else {
pci_note_irq_problem(pdev, "MSI routing failure");
ret = PCI_LOST_IRQ_DISABLE_MSI;
}
return ret;
}
#ifdef CONFIG_ACPI
if (!(acpi_disabled || acpi_noirq)) {
pci_note_irq_problem(pdev, "Potential ACPI misrouting please reboot with acpi=noirq");
/* currently no way to fix acpi on the fly */
return PCI_LOST_IRQ_DISABLE_ACPI;
}
#endif
pci_note_irq_problem(pdev, "unknown cause (not MSI or ACPI)");
return PCI_LOST_IRQ_NO_INFORMATION;
}
EXPORT_SYMBOL(pci_lost_interrupt);