Messages in this thread | | | Date | Sun, 07 Mar 2004 11:13:17 -0500 | From | Jeff Garzik <> | Subject | Re: [PATCH] remove dead ATAPI multi-lun support (used for ide-scsi) |
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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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