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    [PATCH] pciehp: reduce dependence on ACPI · a8a2be94
    rajesh.shah@intel.com 提交于
    Reduce the PCI Express hotplug driver's dependence on ACPI.
    We don't walk the acpi namespace anymore to build a list of
    bridges and devices. We go to ACPI only to run the _OSC or
    _OSHP methods to transition control of hotplug hardware from
    system BIOS to the hotplug driver, and to run the _HPP
    method to get hotplug device parameters like cache line size,
    latency timer and SERR/PERR enable from BIOS.
    
    Note that one of the side effects of this patch is that pciehp
    does not automatically enable the hot-added device or its DMA
    bus mastering capability now. It expects the device driver to
    do that. This may break some drivers and we will have to fix
    them as they are reported.
    Signed-off-by: NRajesh Shah <rajesh.shah@intel.com>
    Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
    a8a2be94
pciehp_hpc.c 41.2 KB