PCI: Remove unused pci_lost_interrupt() (2167c406) · Commits · 戴 / test

drivers/pci/irq.c

+0 −50

Original line number	Diff line number	Diff line
		@@ -6,61 +6,11 @@
		* Copyright (C) 2017 Christoph Hellwig.
		*/

		#include <linux/acpi.h>
		#include <linux/device.h>
		#include <linux/kernel.h>
		#include <linux/export.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);

		pci_err(pdev, "Potentially misrouted IRQ (Bridge %s %04x:%04x)\n",
		dev_name(&parent->dev), parent->vendor, parent->device);
		pci_err(pdev, "%s\n", reason);
		pci_err(pdev, "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);

		/**
		* pci_request_irq - allocate an interrupt line for a PCI device
		* @dev: PCI device to operate on

include/linux/pci.h

+0 −7

Original line number	Diff line number	Diff line
		@@ -1053,13 +1053,6 @@ void pci_sort_breadthfirst(void);

		/* Generic PCI functions exported to card drivers */

		enum pci_lost_interrupt_reason {
		PCI_LOST_IRQ_NO_INFORMATION = 0,
		PCI_LOST_IRQ_DISABLE_MSI,
		PCI_LOST_IRQ_DISABLE_MSIX,
		PCI_LOST_IRQ_DISABLE_ACPI,
		};
		enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
		int pci_find_capability(struct pci_dev *dev, int cap);
		int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
		int pci_find_ext_capability(struct pci_dev *dev, int cap);

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