linux-kernel - Re: [PATCH v4 38/42] virtio

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Date:	Wed, 26 Nov 2014 16:56:42 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Cornelia Huck <cornelia.huck@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, David Miller <davem@...emloft.net>,
	rusty@....ibm.com, nab@...ux-iscsi.org, pbonzini@...hat.com,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	linux-scsi@...r.kernel.org,
	virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH v4 38/42] virtio_scsi: v1.0 support

On Wed, Nov 26, 2014 at 03:51:03PM +0100, Cornelia Huck wrote:
> On Tue, 25 Nov 2014 18:44:08 +0200
> "Michael S. Tsirkin" <mst@...hat.com> wrote:
> 
> > Note: for consistency, and to avoid sparse errors,
> >   convert all fields, even those no longer in use
> >   for virtio v1.0.
> > 
> > Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> > ---
> >  include/linux/virtio_scsi.h | 32 +++++++++++++++-------------
> >  drivers/scsi/virtio_scsi.c  | 51 ++++++++++++++++++++++++++++-----------------
> >  2 files changed, 49 insertions(+), 34 deletions(-)
> > 
> 
> > @@ -158,7 +158,7 @@ static void virtscsi_complete_cmd(struct virtio_scsi *vscsi, void *buf)
> >  		sc, resp->response, resp->status, resp->sense_len);
> > 
> >  	sc->result = resp->status;
> > -	virtscsi_compute_resid(sc, resp->resid);
> > +	virtscsi_compute_resid(sc, __virtio32_to_cpu(vscsi->vdev, resp->resid));
> 
> Confused. Don't you need the non-underscore versions if you pass in a
> vdev as first parameter?

Ouch, this built because vscsi->vdev is true.
thanks!

> >  	switch (resp->response) {
> >  	case VIRTIO_SCSI_S_OK:
> >  		set_host_byte(sc, DID_OK);
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