On Sat, 8 Nov 2014 16:27:54 -0500 (EST) Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Sat, 8 Nov 2014, Mark Knibbs wrote: > > > It seems I didn't take into account the recent patch > > "SCSI: Don't store LUN bits in CDB[1] for USB mass-storage devices"[1], > > which causes my patch to not work properly. I should have actually tested it > > before posting. Sigh. > > > > [1] https://www.mail-archive.com/linux-usb@xxxxxxxxxxxxxxx/msg47868.html > > > > Patch [1] added this code to usb_stor_probe2(): > > /* > > * Like Windows, we won't store the LUN bits in CDB[1] for SCSI-2 > > * devices using the Bulk-Only transport (even though this violates > > * the SCSI spec). > > */ > > if (us->transport == usb_stor_Bulk_transport) > > us_to_host(us)->no_scsi2_lun_in_cdb = 1; > > > > That breaks multi-LUN support for an Entrega USB-SCSI converter with an MPL > > MCDISK dual-slot PCMCIA drive. Probably all SCM-based converters would be > > affected similarly. Whichever LUN is specified, LUN 0 is always accessed. > > Have you tested these devices with a host running Windows? I tested in a Windows VM which had the SCM driver installed. There the LUN bits in CDB[1] were not always zero, and I could access both slots of the MCDISK device. I plan to test in a Windows VM with no SCM driver installed tomorrow. Mark -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
