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    Subject[PATCH 2/5][RFT] ACPI / hotplug: Introduce acpi_install_hotplug_notify_handler()
    Date
    From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

    Introduce a helper routine for installing acpi_hotplug_notify_cb()
    as an ACPI notify handler for the given ACPI namespace node and make
    acpi_scan_init_hotplug() use it.

    This is to make subsequent changes easier to follow.

    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
    ---
    drivers/acpi/scan.c | 15 +++++++++++++--
    include/acpi/acpi_bus.h | 2 ++
    2 files changed, 15 insertions(+), 2 deletions(-)

    Index: linux-pm/drivers/acpi/scan.c
    ===================================================================
    --- linux-pm.orig/drivers/acpi/scan.c
    +++ linux-pm/drivers/acpi/scan.c
    @@ -523,6 +523,18 @@ static void acpi_hotplug_notify_cb(acpi_
    acpi_evaluate_hotplug_ost(handle, type, ost_code, NULL);
    }

    +void acpi_install_hotplug_notify_handler(acpi_handle handle, void *data)
    +{
    + acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
    + acpi_hotplug_notify_cb, data);
    +}
    +
    +void acpi_remove_hotplug_notify_handler(acpi_handle handle)
    +{
    + acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
    + acpi_hotplug_notify_cb);
    +}
    +
    static ssize_t real_power_state_show(struct device *dev,
    struct device_attribute *attr, char *buf)
    {
    @@ -1961,8 +1973,7 @@ static void acpi_scan_init_hotplug(acpi_
    list_for_each_entry(hwid, &pnp.ids, list) {
    handler = acpi_scan_match_handler(hwid->id, NULL);
    if (handler) {
    - acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
    - acpi_hotplug_notify_cb, handler);
    + acpi_install_hotplug_notify_handler(handle, handler);
    break;
    }
    }
    Index: linux-pm/include/acpi/acpi_bus.h
    ===================================================================
    --- linux-pm.orig/include/acpi/acpi_bus.h
    +++ linux-pm/include/acpi/acpi_bus.h
    @@ -434,6 +434,8 @@ static inline bool acpi_device_enumerate
    typedef void (*acpi_hp_callback)(void *data, u32 src);

    acpi_status acpi_hotplug_execute(acpi_hp_callback func, void *data, u32 src);
    +void acpi_install_hotplug_notify_handler(acpi_handle handle, void *data);
    +void acpi_remove_hotplug_notify_handler(acpi_handle handle);

    /**
    * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver


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