On Fri, 2005-11-04 at 12:30 -0800, Matthew Dharm wrote: > > What happens if you prevent USB mangling the scsi_level? I think, for > > the most part, we would handle 0 in about the same way as we handle 2. > > However, we could gate the if around the CDB[1] mangling as > > > > if (scsi_level != SCSI_UNKNOWN && scsi_level <= SCSI_2) > > > > which should fix your problem, I think. > > A long time ago, usb-storage didn't mangle the scsi_level. And almost > nothing worked. Without a SCSI level, 6-byte commands get sent; only > 10-byte commands will do. That area of the scsi subsystem has been changed significantly ... mainly for usb storage. I don't believe your assertion about SCSI_UNKOWN only producing 6 byte CDBs to be correct, the behaviour is now governed by two scsi_device flags: use_10_for_rw and use_10_for_ms which you can control in slave configure. Can you just try it with a modern kernel and see if anything still breaks? Thanks, James - : 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
