ACPI: simplify dock driver with new helper functions

Use helper functions introduced previously to simplify the ACPI dock
driver.

[rjw: Changelog]
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 12 insertions, 110 deletions

diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 1bdb1facc17b..810d1d720b1f 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -226,48 +226,6 @@ find_dock_dependent_device(struct dock_station *ds, acpi_handle handle)
 /*****************************************************************************
  *                         Dock functions                                    *
  *****************************************************************************/
-/**
- * is_dock - see if a device is a dock station
- * @handle: acpi handle of the device
- *
- * If an acpi object has a _DCK method, then it is by definition a dock
- * station, so return true.
- */
-static int is_dock(acpi_handle handle)
-{
-        acpi_status status;
-        acpi_handle tmp;
-
-        status = acpi_get_handle(handle, "_DCK", &tmp);
-        if (ACPI_FAILURE(status))
-                return 0;
-        return 1;
-}
-
-static int __init is_ejectable(acpi_handle handle)
-{
-        acpi_status status;
-        acpi_handle tmp;
-
-        status = acpi_get_handle(handle, "_EJ0", &tmp);
-        if (ACPI_FAILURE(status))
-                return 0;
-        return 1;
-}
-
-static int __init is_ata(acpi_handle handle)
-{
-        acpi_handle tmp;
-
-        if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) ||
-           (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) ||
-           (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) ||
-           (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp))))
-                return 1;
-
-        return 0;
-}
-
 static int __init is_battery(acpi_handle handle)
 {
         struct acpi_device_info *info;
@@ -284,17 +242,13 @@ static int __init is_battery(acpi_handle handle)
         return ret;
 }
 
-static int __init is_ejectable_bay(acpi_handle handle)
+/* Check whether ACPI object is an ejectable battery or disk bay */
+static bool __init is_ejectable_bay(acpi_handle handle)
 {
-        acpi_handle phandle;
+        if (acpi_has_method(handle, "_EJ0") && is_battery(handle))
+                return true;
 
-        if (!is_ejectable(handle))
-                return 0;
-        if (is_battery(handle) || is_ata(handle))
-                return 1;
-        if (!acpi_get_parent(handle, &phandle) && is_ata(phandle))
-                return 1;
-        return 0;
+        return acpi_bay_match(handle);
 }
 
 /**
@@ -312,7 +266,7 @@ int is_dock_device(acpi_handle handle)
         if (!dock_station_count)
                 return 0;
 
-        if (is_dock(handle))
+        if (acpi_dock_match(handle))
                 return 1;
 
         list_for_each_entry(dock_station, &dock_stations, sibling)
@@ -447,37 +401,6 @@ static void dock_event(struct dock_station *ds, u32 event, int num)
 }
 
 /**
- * eject_dock - respond to a dock eject request
- * @ds: the dock station
- *
- * This is called after _DCK is called, to execute the dock station's
- * _EJ0 method.
- */
-static void eject_dock(struct dock_station *ds)
-{
-        struct acpi_object_list arg_list;
-        union acpi_object arg;
-        acpi_status status;
-        acpi_handle tmp;
-
-        /* all dock devices should have _EJ0, but check anyway */
-        status = acpi_get_handle(ds->handle, "_EJ0", &tmp);
-        if (ACPI_FAILURE(status)) {
-                pr_debug("No _EJ0 support for dock device\n");
-                return;
-        }
-
-        arg_list.count = 1;
-        arg_list.pointer = &arg;
-        arg.type = ACPI_TYPE_INTEGER;
-        arg.integer.value = 1;
-
-        status = acpi_evaluate_object(ds->handle, "_EJ0", &arg_list, NULL);
-        if (ACPI_FAILURE(status))
-                pr_debug("Failed to evaluate _EJ0!\n");
-}
-
-/**
  * handle_dock - handle a dock event
  * @ds: the dock station
  * @dock: to dock, or undock - that is the question
@@ -537,27 +460,6 @@ static inline void complete_undock(struct dock_station *ds)
         ds->flags &= ~(DOCK_UNDOCKING);
 }
 
-static void dock_lock(struct dock_station *ds, int lock)
-{
-        struct acpi_object_list arg_list;
-        union acpi_object arg;
-        acpi_status status;
-
-        arg_list.count = 1;
-        arg_list.pointer = &arg;
-        arg.type = ACPI_TYPE_INTEGER;
-        arg.integer.value = !!lock;
-        status = acpi_evaluate_object(ds->handle, "_LCK", &arg_list, NULL);
-        if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
-                if (lock)
-                        acpi_handle_warn(ds->handle,
-                                "Locking device failed (0x%x)\n", status);
-                else
-                        acpi_handle_warn(ds->handle,
-                                "Unlocking device failed (0x%x)\n", status);
-        }
-}
-
 /**
  * dock_in_progress - see if we are in the middle of handling a dock event
  * @ds: the dock station
@@ -692,8 +594,8 @@ static int handle_eject_request(struct dock_station *ds, u32 event)
 
         hotplug_dock_devices(ds, ACPI_NOTIFY_EJECT_REQUEST);
         undock(ds);
-        dock_lock(ds, 0);
-        eject_dock(ds);
+        acpi_evaluate_lck(ds->handle, 0);
+        acpi_evaluate_ej0(ds->handle);
         if (dock_present(ds)) {
                 acpi_handle_err(ds->handle, "Unable to undock!\n");
                 return -EBUSY;
@@ -752,7 +654,7 @@ static void dock_notify(acpi_handle handle, u32 event, void *data)
                         hotplug_dock_devices(ds, event);
                         complete_dock(ds);
                         dock_event(ds, event, DOCK_EVENT);
-                        dock_lock(ds, 1);
+                        acpi_evaluate_lck(ds->handle, 1);
                         acpi_update_all_gpes();
                         break;
                 }
@@ -998,9 +900,9 @@ static int __init dock_add(acpi_handle handle)
         /* we want the dock device to send uevents */
         dev_set_uevent_suppress(&dd->dev, 0);
 
-        if (is_dock(handle))
+        if (acpi_dock_match(handle))
                 dock_station->flags |= DOCK_IS_DOCK;
-        if (is_ata(handle))
+        if (acpi_ata_match(handle))
                 dock_station->flags |= DOCK_IS_ATA;
         if (is_battery(handle))
                 dock_station->flags |= DOCK_IS_BAT;
@@ -1043,7 +945,7 @@ err_unregister:
 static __init acpi_status
 find_dock_and_bay(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
-        if (is_dock(handle) || is_ejectable_bay(handle))
+        if (acpi_dock_match(handle) || is_ejectable_bay(handle))
                 dock_add(handle);
 
         return AE_OK;