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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>
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82545394e0
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406f692d08
@ -452,6 +452,25 @@ static inline void complete_undock(struct dock_station *ds)
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ds->flags &= ~(DOCK_UNDOCKING);
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}
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static void dock_lock(struct dock_station *ds, int lock)
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{
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struct acpi_object_list arg_list;
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union acpi_object arg;
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acpi_status status;
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arg_list.count = 1;
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arg_list.pointer = &arg;
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arg.type = ACPI_TYPE_INTEGER;
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arg.integer.value = !!lock;
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status = acpi_evaluate_object(ds->handle, "_LCK", &arg_list, NULL);
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
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if (lock)
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printk(KERN_WARNING PREFIX "Locking device failed\n");
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else
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printk(KERN_WARNING PREFIX "Unlocking device failed\n");
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}
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}
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/**
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* dock_in_progress - see if we are in the middle of handling a dock event
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* @ds: the dock station
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@ -577,6 +596,7 @@ static int handle_eject_request(struct dock_station *ds, u32 event)
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hotplug_dock_devices(ds, ACPI_NOTIFY_EJECT_REQUEST);
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undock(ds);
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dock_lock(ds, 0);
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eject_dock(ds);
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if (dock_present(ds)) {
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printk(KERN_ERR PREFIX "Unable to undock!\n");
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@ -617,6 +637,7 @@ static void dock_notify(acpi_handle handle, u32 event, void *data)
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hotplug_dock_devices(ds, event);
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complete_dock(ds);
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dock_event(ds, event, DOCK_EVENT);
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dock_lock(ds, 1);
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}
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break;
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case ACPI_NOTIFY_DEVICE_CHECK:
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