Re: [PATCH v6 4/6] scsi: add BLIST_NO_LUN_1F blacklist flag

[Hannes Reinecke]

On 6/8/26 23:34, Phil Pemberton wrote:
> Some multi-LUN devices respond to INQUIRY on unpopulated LUNs with
> PQ=0 / PDT=0x1f instead of the standard PQ=3.  The SCSI scan layer
> normally adds such devices (PQ=0 means "connected"), producing
> spurious "No Device" entries.
>
> The scsi_target field pdt_1f_for_no_lun already exists to suppress
> this, but was previously only set by the USB UFI driver.
>
> Add BLIST_NO_LUN_1F so the flag can be set per-device from
> scsi_devinfo, and wire it up in scsi_add_lun() to set
> starget->pdt_1f_for_no_lun from the blacklist flags.  This runs
> during LUN 0 processing, before the sequential LUN scan probes
> higher LUNs.
>
> Signed-off-by: Phil Pemberton <philpem@xxxxxxxxxxxxx>
> ---
>   drivers/scsi/scsi_scan.c    | 2 ++
>   include/scsi/scsi_devinfo.h | 6 +++---
>   2 files changed, 5 insertions(+), 3 deletions(-)
Reviewed-by: Hannes Reinecke <hare@xxxxxxxxxx>

Cheers,

Hannes
--
Dr. Hannes Reinecke                  Kernel Storage Architect
hare@xxxxxxx                                +49 911 74053 688
SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich