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Date: Fri, 04 Nov 2011 10:38:29 +0100
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] Do you have a use for a tester of virtio-scsi with
 CD drives ?
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To: Thomas Schmitt <scdbackup@gmx.net>
Cc: kwolf@redhat.com, stefanha@gmail.com, qemu-devel@nongnu.org

On 11/04/2011 10:18 AM, Thomas Schmitt wrote:
>
> Paolo:
> May i ask for the favor that you try to add O_RDWR to the qemu_open()
> call of passthrough devices ?

I think the problem is that you're passing media=cdrom:

     if (media == MEDIA_CDROM) {
         /* CDROM is fine for any interface, don't check.  */
         ro = 1;
     }

Just do not do that when using scsi-generic.

Paolo