+ ret = lttng_ust_ctl_flush_buffer(stream->ustream, 0);
+ if (ret) {
+ ERR("Failed to flush buffer while flushing channel: channel key = %" PRIu64 ", channel name = '%s'",
+ chan_key, channel->name);
+ ret = LTTNG_ERR_BUFFER_FLUSH_FAILED;
+ pthread_mutex_unlock(&stream->lock);
+ goto error;
+ }