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d18690af62
Current acpi_find_root_bridge_handle() has a assumption that pci_bus->self is NULL on the root pci bus. But it might not be true on some platforms. Because of this wrong assumption, current acpi_find_root_bridge_handle() might cause endless loop. We must check pci_bus->parent instead. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
37 lines
846 B
C
37 lines
846 B
C
/*
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* File pci-acpi.h
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*
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* Copyright (C) 2004 Intel
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* Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
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*/
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#ifndef _PCI_ACPI_H_
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#define _PCI_ACPI_H_
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#include <linux/acpi.h>
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#ifdef CONFIG_ACPI
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static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
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{
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struct pci_bus *pbus = pdev->bus;
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/* Find a PCI root bus */
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while (pbus->parent)
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pbus = pbus->parent;
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return acpi_get_pci_rootbridge_handle(pci_domain_nr(pbus),
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pbus->number);
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}
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static inline acpi_handle acpi_pci_get_bridge_handle(struct pci_bus *pbus)
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{
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if (pbus->parent)
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return DEVICE_ACPI_HANDLE(&(pbus->self->dev));
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return acpi_get_pci_rootbridge_handle(pci_domain_nr(pbus),
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pbus->number);
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}
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#else
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static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
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{ return NULL; }
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#endif
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#endif /* _PCI_ACPI_H_ */
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