Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id <S281890AbRLOCy0>; Fri, 14 Dec 2001 21:54:26 -0500
Received: (majordomo@vger.kernel.org) by vger.kernel.org
	id <S281836AbRLOCyH>; Fri, 14 Dec 2001 21:54:07 -0500
Received: from astound-64-85-224-253.ca.astound.net ([64.85.224.253]:14610
	"EHLO master.linux-ide.org") by vger.kernel.org with ESMTP
	id <S281893AbRLOCxx>; Fri, 14 Dec 2001 21:53:53 -0500
Date: Fri, 14 Dec 2001 16:06:16 -0800 (PST)
From: Andre Hedrick <andre@linux-ide.org>
To: Jens Axboe <axboe@suse.de>
cc: Carl Ritson <critson@perlfu.co.uk>, linux-kernel@vger.kernel.org
Subject: Re: OOPS: 2.5.1-pre8 - cdrecord + ide_scsi
In-Reply-To: <20011209153820.GE28729@suse.de>
Message-ID: <Pine.LNX.4.10.10112141604430.10899-100000@master.linux-ide.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Sender: linux-kernel-owner@vger.kernel.org
X-Mailing-List: linux-kernel@vger.kernel.org


Sorry Jens, you are mis-informed.
SCSI is only the packbuilder, but it is excuted by the ATA PacketCommand.

Regards,

Andre Hedrick
CEO/President, LAD Storage Consulting Group
Linux ATA Development
Linux Disk Certification Project

On Sun, 9 Dec 2001, Jens Axboe wrote:

> On Sun, Dec 09 2001, Carl Ritson wrote:
> > On Sun, 9 Dec 2001, Jens Axboe wrote:
> > > > > > Agrh, because of a bug in ide-scsi conversion this (other) bug went
> > > > > > unnoticed for a while. Basically we cannot look up the request queue
> > > > > > reliably from a request, since it may not have originated from the block
> > > > > > layer. ide-scsi builds it's own, for example. For those, we don't want
> > > > > > to trust the sg count either.
> > > > > >
> > > > > > Does attached patch work?
> > > > >
> > > > > Irk, there's a ide-scsi bug in there too. In
> > > > > drivers/scsi/ide-scsi.c:idescsi_free_bio() change the kfree(bhp) to
> > > > > bio_put(bhp)
> > > > >
> > > >
> > > > With both these fixes applied cdrecord hangs for 30 seconds, then spits
> > > > out "cdrecord: No such device or address. Cannot send SCSI cmd via ioctl",
> > > > a couple of hundred times.
> > > >
> > > > In the from dmesg from the same time I get.
> > > > ------
> > > > hdc: timeout waiting for DMA
> > > > ide_dmaproc: chipset supported ide_dma_timeout func only: 14
> > > > hdc: status error: status=0x58 { DriveReady SeekComplete DataRequest }
> > > > hdc: drive not ready for command
> > > > scsi: device set offline - command error recover failed: host 0 channel 0
> > > > id 0 lun 0
> > > > ------
> > >
> > > Please try a run with DMA disabled.
> > >
> > 
> > Ok works with DMA off, so I expect that this new error is due to my resent
> > memory upgrade (36 Hours ago) and the switch to using HIGHMEM(4GB)..
> > So am I to believe that DMA is a problem with HIGHMEM(4GB) enabled ?
> 
> No it's probably still an ide-scsi bug, I'm not suspecting your
> hardware. The reason I ask is because until -pre8 (since bio merge in
> -pre2), ide-scsi never used DMA even though it was set for the drive.
> 
> -- 
> Jens Axboe

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/