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Re: [Qemu-devel] lsi53c895a lsi_do_dma assertion failure


From: Paolo Bonzini
Subject: Re: [Qemu-devel] lsi53c895a lsi_do_dma assertion failure
Date: Mon, 16 Mar 2015 18:21:23 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0


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



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