ssize_t ret;
ret = qemu_chr_write(vcon->chr, buf, len);
-
trace_virtio_console_flush_buf(port->id, len, ret);
+
+ if (ret < 0) {
+ /*
+ * Ideally we'd get a better error code than just -1, but
+ * that's what the chardev interface gives us right now. If
+ * we had a finer-grained message, like -EPIPE, we could close
+ * this connection. Absent such error messages, the most we
+ * can do is to return 0 here.
+ *
+ * This will prevent stray -1 values to go to
+ * virtio-serial-bus.c and cause abort()s in
+ * do_flush_queued_data().
+ */
+ ret = 0;
+ }
return ret;
}