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    Subject[PATCH v4 2/9] pci: Add hotplug_slot_ops.reset_slot()
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    This optional callback allows htoplug controllers to perform slot
    specific resets. These may be necessary in cases where a normal
    secondary bus reset can interact with controller logic and expose
    spurious hotplugs.

    Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
    ---
    include/linux/pci_hotplug.h | 4 ++++
    1 file changed, 4 insertions(+)

    diff --git a/include/linux/pci_hotplug.h b/include/linux/pci_hotplug.h
    index 8db71dc..bd32109 100644
    --- a/include/linux/pci_hotplug.h
    +++ b/include/linux/pci_hotplug.h
    @@ -63,6 +63,9 @@ enum pcie_link_width {
    * @get_adapter_status: Called to get see if an adapter is present in the slot or not.
    * If this field is NULL, the value passed in the struct hotplug_slot_info
    * will be used when this value is requested by a user.
    + * @reset_slot: Optional interface to allow override of a bus reset for the
    + * slot for cases where a secondary bus reset can result in spurious
    + * hotplug events or where a slot can be reset independent of the bus.
    *
    * The table of function pointers that is passed to the hotplug pci core by a
    * hotplug pci driver. These functions are called by the hotplug pci core when
    @@ -80,6 +83,7 @@ struct hotplug_slot_ops {
    int (*get_attention_status) (struct hotplug_slot *slot, u8 *value);
    int (*get_latch_status) (struct hotplug_slot *slot, u8 *value);
    int (*get_adapter_status) (struct hotplug_slot *slot, u8 *value);
    + int (*reset_slot) (struct hotplug_slot *slot, int probe);
    };

    /**


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