Alan Stern wrote: > New USB devices can appear at any time. None are present when the > system is started; they are all detected dynamically by the khubd > thread. > > While I'm not familiar with the details of any other hotpluggable > buses (like Firewire), I imagine much the same is true for them. It's very similar with FireWire. FireWire devices announce SBP-2 target capability (if they have it) after they became ready. The ieee1394 or firewire core then scans or re-scans them in a process context. Then upper layer drivers like the SBP-2 driver are matched, bound, probed. If SBP-2 targets went through a power state change, they typically first power everything up (spin up media etc.) before they announce their protocol capabilities, and this may of course take a while. Before that they just are inaccessible, and it is unknown whether they could become candidates for access by upper layer drivers. -- Stefan Richter -=====-==--- -==- =-=-- http://arcgraph.de/sr/ -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
