On Fri, 2005-03-25 at 14:38 +0900, Tejun Heo wrote: > We have users of scsi_do_req() other than scsi_wait_req() and they > use different done() functions to do different things. I've checked > other done functions and none uses contents inside the passed > scsi_cmnd, so using a dummy command should be okay with them. Am I > missing something here?
Well ... the other users are supposed to be going away. They're actually all coded wrongly in some way or other ... perhaps I should speed up the process. > Oh, and I would really appreciate if you can fill me in / give a > pointer about the scsi_request/scsi_cmnd distinction. The block layer speaks in terms of requests and the scsi layers in terms of commands. The scsi_request_fn() actually associates a request with a command. However, since SCSI uses the block layer for queueing, all the internal scsi command submit paths have to use requests. This is what a scsi_request is. The reason for the special casing is that we can't use the normal REQ_CMD or REQ_BLOCK_PC paths because they need ULD initialisation and back end processing. James - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
