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SubjectRe: [PATCH] remove dead ATAPI multi-lun support (used for ide-scsi)
Willem Riede wrote:
> On 2004.02.20 16:47, Bartlomiej Zolnierkiewicz wrote:
>
>>[IDE] remove dead ATAPI multi-lun support (used for ide-scsi)
>>
>>ChangeSet@1.889.69.2 03-01-23 14:51:03-05:00 adam@yggdrasil.com
>>| The following changes to ide-scsi.c are a recovery of the
>>| changes that I had in ide-scsi.c in the stock kernel's before
>>| Martin Dalecki's IDE tree was reverted and a few other changes.
>>...
>>
>>broke it.
>>
>>Before this change drive->id->last_id & 0x7 was used as shost->max_lun
>>and "hdXlun=" kernel parameter could be used to override it.
>>
>>It was needed probably only for some rare ATAPI PD-CD drives
>>(http://www.geocrawler.com/archives/3/58/1999/11/50/2877161/).
>>
>>However it was far from optimal:
>>- people played with "hdXlun=" and then complained about multiple instances
>> of the same device (most ATAPI drives respond to each LUN)
>>- probably some devices return 7 not 0 in id->last_id (=> 7 x same device)
>>
>>This patch cleans things up, multi-lun will be fixed if needed in ide-scsi.
>>I think that this may work but can't verify it:
>>
>> if (id->last_lun && id->last_lun != 7)
>> shost->max_lun = id->last_lun + 1;
>> else
>> shost->max_lun = 1;
>
>
> I have verified that this works with my PD/CD drive, the patch to ide-scsi.c
> that I suggest (against linux-2.6.4-rc1-mm2) is below.


I have a multi-LUN ATAPI CD changer here...

Jeff



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