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由 Dmitry Torokhov 提交于
thermal_cooling_device_register() returns error encoded in a pointer when it fails in which case we need to explictly set device->cdev to NULL so we don't try to unregister it when unloading. Signed-off-by: NDmitry Torokhov <dtor@mail.ru> Acked-by: NZhang Rui <rui.zhang@intel.com> Signed-off-by: NLen Brown <len.brown@intel.com>
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