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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: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Shaohua Li 2008-08-28 10:03:26 +08:00 committed by Len Brown
parent 82545394e0
commit 406f692d08
1 changed files with 21 additions and 0 deletions
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21
drivers/acpi/dock.c
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@ -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: