[dpdk-dev] [PATCH] net/virtio: fix queue notify

[Yuanhan Liu]

On Wed, Apr 12, 2017 at 02:39:25PM -0700, Stephen Hemminger wrote:
> On Tue, 11 Apr 2017 03:44:28 -0700
> Xiao Wang <xiao.w.wang at intel.com> wrote:
> 
> > According to spec, we should write virtqueue index into the notify
> > address, rather than 1. Besides, some HW backend may rely on the data
> > written to identify which queue need to serve.
> > 
> > Fixes: 6ba1f63b5ab0 ("virtio: support specification 1.0")
> > Cc: stable at dpdk.org
> > 
> > Signed-off-by: Xiao Wang <xiao.w.wang at intel.com>
> > ---
> >  drivers/net/virtio/virtio_pci.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
> > index ce9a9d3..b767c03 100644
> > --- a/drivers/net/virtio/virtio_pci.c
> > +++ b/drivers/net/virtio/virtio_pci.c
> > @@ -504,7 +504,7 @@
> >  static void
> >  modern_notify_queue(struct virtio_hw *hw __rte_unused, struct virtqueue *vq)
> >  {
> > -	rte_write16(1, vq->notify_addr);
> > +	rte_write16(vq->vq_queue_index, vq->notify_addr);
> >  }
> 
> 
> Yes, this looks correct. It is what Linux and FreeBSD drivers do.
> 
> Reviewed-by: Stephen Hemminger <stephen at networkplumber.org>

Applied to dpdk-next-virtio.

Thanks.

	--yliu