support _LCK method, which is a optional method for hotplug
Signed-off-by: Shaohua Li <shaohua.li@xxxxxxxxx>
---
drivers/acpi/dock.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
Index: linux/drivers/acpi/dock.c
===================================================================
--- linux.orig/drivers/acpi/dock.c 2008-06-05 09:09:13.000000000 +0800
+++ linux/drivers/acpi/dock.c 2008-06-05 11:20:58.000000000 +0800
@@ -452,6 +452,22 @@ static inline void complete_undock(struc
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)
+ printk(KERN_WARNING PREFIX "%s device failed\n",
+ lock ? "Locking" : "Unlocking");
+}
+
/**
* dock_in_progress - see if we are in the middle of handling a dock event
* @ds: the dock station
@@ -577,6 +593,7 @@ static int handle_eject_request(struct d
dock_event(ds, event, UNDOCK_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");
@@ -616,6 +633,7 @@ static void dock_notify(acpi_handle hand
hotplug_dock_devices(ds, event);
complete_dock(ds);
dock_event(ds, event, DOCK_EVENT);
+ dock_lock(ds, 1);
}
break;
case ACPI_NOTIFY_DEVICE_CHECK:
--
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