From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:59893)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <paolo.bonzini@gmail.com>) id 1YXYhq-0005Il-Sm
	for qemu-devel@nongnu.org; Mon, 16 Mar 2015 13:21:35 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <paolo.bonzini@gmail.com>) id 1YXYhk-0001EB-Ho
	for qemu-devel@nongnu.org; Mon, 16 Mar 2015 13:21:34 -0400
Received: from mail-we0-x229.google.com ([2a00:1450:400c:c03::229]:36138)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <paolo.bonzini@gmail.com>) id 1YXYhk-0001Dt-C3
	for qemu-devel@nongnu.org; Mon, 16 Mar 2015 13:21:28 -0400
Received: by wetk59 with SMTP id k59so43406306wet.3
	for <qemu-devel@nongnu.org>; Mon, 16 Mar 2015 10:21:27 -0700 (PDT)
Sender: Paolo Bonzini <paolo.bonzini@gmail.com>
Message-ID: <55071113.9010406@redhat.com>
Date: Mon, 16 Mar 2015 18:21:23 +0100
From: Paolo Bonzini <pbonzini@redhat.com>
MIME-Version: 1.0
References: <D12D2D07.2BF80%ctakemura@axcient.com>
In-Reply-To: <D12D2D07.2BF80%ctakemura@axcient.com>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
Subject: Re: [Qemu-devel] lsi53c895a lsi_do_dma assertion failure
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Chris Takemura <ctakemura@axcient.com>, qemu-devel <qemu-devel@nongnu.org>



On 16/03/2015 16:59, Chris Takemura wrote:
> Hi everyone,
> 
> We're using qemu as a device model for xen 4.4.  Lately we've been
> having qemu crashes with this output:
> 
> lsi_scsi: error: Unhandled writeb 0xff = 0x0
> 
> lsi_scsi: error: Unhandled writeb 0x100 = 0x0
> 
> lsi_scsi: error: Unhandled writeb 0x101 = 0x0
> 
> lsi_scsi: error: Unhandled writeb 0x102 = 0x0
> 
> qemu-system-i386: /home/chris/qemu/hw/scsi/lsi53c895a.c:541: lsi_do_dma:
> Assertion `s->current' failed.
> 
> 
> This is with a clean qemu-2.1.0 tree, built for Xen.
> 
> I confirmed that commit d1d74664ea99cdc571afee12e31c8625595765b0 is
> present in our code.  (As described in the thread that begins
> with http://qemu-devel.nongnu.narkive.com/LtGj28sZ/win2k8-32-bit-mix-of-ide-and-scsi-assertion ).

What guest is this?  The answer is basically "do not use this device
model", it is old and buggy and newer guests do not even ship the driver
anymore.

Paolo