if (sscanf(name, "%d:%d:%d:%d", &host, &bus, &target, &lun) != 4)
- /* rebase host offset to get the local relative number */
+ * Rebase host offset to get the local relative number
+ * Note: This is by definition racy, unreliable and too simple.
+ * Please do not copy this model anywhere. It's just a left-over
+ * from the time we had no idea how things should look like in
+ * Making assumptions about a global in-kernel counter and use
+ * that to calculate a local offset is a very broken concept. It
+ * can only work as long as things are in strict order.
+ * The kernel needs to export the instance/port number of a
+ * controller directly, without the need for rebase magic like
+ * this. Manual driver unbind/bind, parallel hotplug/unplug will
+ * get into the way of this "I hope it works" logic.
base = strdup(udev_device_get_syspath(hostdev));