forked from luck/tmp_suning_uos_patched
87bec66b96
Add reference count and disable ACPI PCI Interrupt Link when no device still uses it. Warn when drivers have not released Link at suspend time. http://bugzilla.kernel.org/show_bug.cgi?id=3469 Signed-off-by: David Shaohua Li <shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
#include <linux/pci.h>
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#include <linux/acpi.h>
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#include <linux/init.h>
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#include <linux/irq.h>
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#include <asm/hw_irq.h>
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#include "pci.h"
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struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum)
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{
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if (domain != 0) {
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printk(KERN_WARNING "PCI: Multiple domains not supported\n");
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return NULL;
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}
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return pcibios_scan_root(busnum);
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}
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extern int pci_routeirq;
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static int __init pci_acpi_init(void)
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{
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struct pci_dev *dev = NULL;
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if (pcibios_scanned)
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return 0;
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if (acpi_noirq)
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return 0;
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printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
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acpi_irq_penalty_init();
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pcibios_scanned++;
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pcibios_enable_irq = acpi_pci_irq_enable;
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pcibios_disable_irq = acpi_pci_irq_disable;
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if (pci_routeirq) {
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/*
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* PCI IRQ routing is set up by pci_enable_device(), but we
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* also do it here in case there are still broken drivers that
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* don't use pci_enable_device().
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*/
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printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
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while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL)
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acpi_pci_irq_enable(dev);
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} else
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printk(KERN_INFO "PCI: If a device doesn't work, try \"pci=routeirq\". If it helps, post a report\n");
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#ifdef CONFIG_X86_IO_APIC
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if (acpi_ioapic)
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print_IO_APIC();
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#endif
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return 0;
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}
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subsys_initcall(pci_acpi_init);
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