src/patches/suse-2.6.27.31/patches.arch/acpi-dock-_LCK-support-for-dock.patch

   1 From: Shaohua Li <shaohua.li@intel.com>
   2 Subject: add _LCK support for dock
   3 Patch-mainline: submitted 2008-08-28
   4 References: fate#304731,bnc#401740
   5
   6 support _LCK method, which is a optional method for hotplug
   7
   8 Signed-off-by: Shaohua Li <shaohua.li@intel.com>
   9 Signed-off-by: Holger Macht <hmacht@suse.de>
  10 ---
  11
  12 diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
  13 index 78d27ce..7bdf93b 100644
  14 --- a/drivers/acpi/dock.c
  15 +++ b/drivers/acpi/dock.c
  16 @@ -452,6 +452,25 @@ static inline void complete_undock(struct dock_station *ds)
  17         ds->flags &= ~(DOCK_UNDOCKING);
  18  }
  19
  20 +static void dock_lock(struct dock_station *ds, int lock)
  21 +{
  22 +       struct acpi_object_list arg_list;
  23 +       union acpi_object arg;
  24 +       acpi_status status;
  25 +
  26 +       arg_list.count = 1;
  27 +       arg_list.pointer = &arg;
  28 +       arg.type = ACPI_TYPE_INTEGER;
  29 +       arg.integer.value = !!lock;
  30 +       status = acpi_evaluate_object(ds->handle, "_LCK", &arg_list, NULL);
  31 +       if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
  32 +               if (lock)
  33 +                       printk(KERN_WARNING PREFIX "Locking device failed\n");
  34 +               else
  35 +                       printk(KERN_WARNING PREFIX "Unlocking device failed\n");
  36 +       }
  37 +}
  38 +
  39  /**
  40   * dock_in_progress - see if we are in the middle of handling a dock event
  41   * @ds: the dock station
  42 @@ -577,6 +596,7 @@ static int handle_eject_request(struct dock_station *ds, u32 event)
  43
  44         hotplug_dock_devices(ds, ACPI_NOTIFY_EJECT_REQUEST);
  45         undock(ds);
  46 +       dock_lock(ds, 0);
  47         eject_dock(ds);
  48         if (dock_present(ds)) {
  49                 printk(KERN_ERR PREFIX "Unable to undock!\n");
  50 @@ -617,6 +637,7 @@ static void dock_notify(acpi_handle handle, u32 event, void *data)
  51                         hotplug_dock_devices(ds, event);
  52                         complete_dock(ds);
  53                         dock_event(ds, event, DOCK_EVENT);
  54 +                       dock_lock(ds, 1);
  55                 }
  56                 break;
  57         case ACPI_NOTIFY_DEVICE_CHECK: