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    drivers/pci/hotplug: Support surprise hotplug in powernv driver · 360aebd8
    Gavin Shan 提交于
    This supports PCI surprise hotplug. The design is highlighted as
    below:
    
       * The PCI slot's surprise hotplug capability is exposed through
         device node property "ibm,slot-surprise-pluggable", meaning
         PCI surprise hotplug will be disabled if skiboot doesn't support
         it yet.
       * The interrupt because of presence or link state change is raised
         on surprise hotplug event. One event is allocated and queued to
         the PCI slot for workqueue to pick it up and process in serialized
         fashion. The code flow for surprise hotplug is same to that for
         managed hotplug except: the affected PEs are put into frozen state
         to avoid unexpected EEH error reporting in surprise hot remove path.
    Signed-off-by: NGavin Shan <gwshan@linux.vnet.ibm.com>
    Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
    360aebd8
pnv-pci.h 2.6 KB