Snap for 6056566 from d2f27cd1 to rvc-release

static int adev_close(hw_device_t *device)

{

    size_t i;

    struct audio_device *adev_temp = (struct audio_device *)device;

    if (!adev_temp)

        return 0;

    pthread_mutex_lock(&adev_init_lock);

    if (!device || ((struct audio_device *)device != adev))

        goto done;

    if ((--audio_device_ref_count) == 0) {

        audio_extn_snd_mon_unregister_listener(adev);

            adev->adm_deinit(adev->adm_data);

        pthread_mutex_destroy(&adev->lock);

        free(device);

        adev = NULL;

    }

done:

    pthread_mutex_unlock(&adev_init_lock);

    return 0;

}