Re: [PATCH v7 31/46] vhost: virtio 1.0 endian-ness support

Michael S. Tsirkin
2014-12-01T12:50:18Z

On Mon, Dec 01, 2014 at 01:42:47PM +0100, Cornelia Huck wrote:
> On Mon, 1 Dec 2014 14:37:01 +0200
> "Michael S. Tsirkin" <mst@redhat.com> wrote:
>
> > On Mon, Dec 01, 2014 at 01:33:53PM +0100, Cornelia Huck wrote:
> > > On Sun, 30 Nov 2014 17:11:49 +0200
> > > "Michael S. Tsirkin" <mst@redhat.com> wrote:
> > >
> > > > Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> > > > ---
> > > > drivers/vhost/vhost.c | 93 +++++++++++++++++++++++++++++++--------------------
> > > > 1 file changed, 56 insertions(+), 37 deletions(-)
> > > >
> > >
> > > > @@ -1113,18 +1120,19 @@ static int get_indirect(struct vhost_virtqueue *vq,
> > > > {
> > > > struct vring_desc desc;
> > > > unsigned int i = 0, count, found = 0;
> > > > + u32 len = vhost32_to_cpu(vq, indirect->len);
> > > > int ret;
> > > >
> > > > /* Sanity check */
> > > > - if (unlikely(indirect->len % sizeof desc)) {
> > > > + if (unlikely(len % sizeof desc)) {
> > > > vq_err(vq, "Invalid length in indirect descriptor: "
> > > > "len 0x%llx not multiple of 0x%zx\n",
> > > > - (unsigned long long)indirect->len,
> > > > + (unsigned long long)vhost32_to_cpu(vq, indirect->len),
> > >
> > > Can't you use len here?
> >
> > Not if I want error message to be readable.
>
> Huh? Both have the same value.

Ah, good point.