post proc : volume listener : fix effect release crash

    struct listnode *node, *temp_node_next;

    vol_listener_context_t *context = NULL;

    vol_listener_context_t *recv_contex = (vol_listener_context_t *)handle;

    int status = -1;

    int status = -EINVAL;

    bool recompute_flag = false;

    int active_stream_count = 0;

    uint32_t session_id;

    uint32_t stream_type;

    effect_uuid_t uuid;

    ALOGV("%s context %p", __func__, handle);

    if (recv_contex == NULL) {

        return status;

    }

    pthread_mutex_lock(&vol_listner_init_lock);

    session_id = recv_contex->session_id;

    stream_type = recv_contex->stream_type;

    uuid = recv_contex->desc->uuid;

    // check if the handle/context provided is valid

    list_for_each_safe(node, temp_node_next, &vol_effect_list) {

        context = node_to_item(node, struct vol_listener_context_s, effect_list_node);

        if ((memcmp(&(context->desc->uuid), &(recv_contex->desc->uuid), sizeof(effect_uuid_t)) == 0)

            && (context->session_id == recv_contex->session_id)

            && (context->stream_type == recv_contex->stream_type)) {

        if ((memcmp(&(context->desc->uuid), &uuid, sizeof(effect_uuid_t)) == 0)

            && (context->session_id == session_id)

            && (context->stream_type == stream_type)) {

            ALOGV("--- Found something to remove ---");

            list_remove(&context->effect_list_node);

            list_remove(node);

            PRINT_STREAM_TYPE(context->stream_type);

            if (context->dev_id == AUDIO_DEVICE_OUT_SPEAKER) {

                recompute_flag = true;

    if (status != 0) {

        ALOGE("something wrong ... <<<--- Found NOTHING to remove ... ???? --->>>>>");

        pthread_mutex_unlock(&vol_listner_init_lock);

        return status;

    }

    // if there are no active streams, reset cal and volume level