Re: [Qemu-devel] [PATCH 12/17] megasas: Clear unit attention on initial reset

[Hannes Reinecke]

On 10/29/2014 10:14 AM, Paolo Bonzini wrote:
> On 10/29/2014 08:53 AM, Hannes Reinecke wrote:
> > +
> > +        /*
> > +         * The EFI firmware doesn't handle UA,
> > +         * so we need to clear the Power On/Reset UA
> > +         * after the initial reset.
> > +         */
> > +        QTAILQ_FOREACH(kid, &s->bus.qbus.children, sibling) {
> > +            SCSIDevice *sdev = DO_UPCAST(SCSIDevice, qdev, kid->child);
> > +            SCSISense *ua;
> > +
> > +            ua = &sdev->unit_attention;
> > +            *ua = SENSE_CODE(NO_SENSE);
>
> Just sdev->unit_attention = SENSE_CODE(NO_SENSE)?
Ok.

> > +            sdev->sense_is_ua = false;
>
> Setting sense_is_ua is unnecessary, it refers to dev->sense rather than
> dev->unit_attention.  Just assert(dev->sense_len == 0) if you care.
>
> You need this too:
>
>          scsi_device_unit_attention_reported(sdev);
>
> Otherwise the state machine that reports CD-ROM media changes gets
> messed up.
yeah, this is all a bit ad-hoc. So I'll be fixing it up with the next
round.

Cheers,

Hannes