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    PCI hotplug: introduce functions for ACPI slot detection · e8c331e9
    Kenji Kaneshige 提交于
    Some ACPI related PCI hotplug code can be shared among PCI hotplug
    drivers. This patch introduces the following functions in
    drivers/pci/hotplug/acpi_pcihp.c to share the code, and changes
    acpiphp and pciehp to use them.
    
    - int acpi_pci_detect_ejectable(struct pci_bus *pbus)
      This checks if the specified PCI bus has ejectable slots.
    
    - int acpi_pci_check_ejectable(struct pci_bus *pbus, acpi_handle handle)
      This checks if the specified handle is ejectable ACPI PCI slot. The
      'pbus' parameter is needed to check if 'handle' is PCI related ACPI
      object.
    
    This patch also introduces the following inline function in
    include/linux/pci-acpi.h, which is useful to get ACPI handle of the
    PCI bridge from struct pci_bus of the bridge's secondary bus.
    
    - static inline acpi_handle acpi_pci_get_bridge_handle(struct pci_bus *pbus)
      This returns ACPI handle of the PCI bridge which generates PCI bus
      specified by 'pbus'.
    Signed-off-by: NKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
    Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
    e8c331e9
acpi_pcihp.c 15.8 KB