Commit 406f692d authored by Shaohua Li's avatar Shaohua Li Committed by Len Brown
Browse files

dock: add _LCK support 



support _LCK method, which is a optional method for hotplug

lenb: we have not seen _LCK used in the field yet

Signed-off-by: default avatarShaohua Li <shaohua.li@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 82545394

drivers/acpi/dock.c

+21 −0
Original line number Diff line number Diff line
@@ -452,6 +452,25 @@ 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)

			printk(KERN_WARNING PREFIX "Locking device failed\n");

		else

			printk(KERN_WARNING PREFIX "Unlocking device failed\n");

	}

}



/**

 * dock_in_progress - see if we are in the middle of handling a dock event

 * @ds: the dock station
@@ -577,6 +596,7 @@ 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);

	if (dock_present(ds)) {

		printk(KERN_ERR PREFIX "Unable to undock!\n");
@@ -617,6 +637,7 @@ 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);

		}

		break;

	case ACPI_NOTIFY_DEVICE_CHECK: