[dpdk-dev] [PATCH] net/vhost: Initialise vid to -1
Loftus, Ciara
ciara.loftus at intel.com
Mon Apr 30 15:57:36 CEST 2018
>
> On 04/27/2018 04:19 PM, Ciara Loftus wrote:
> > rte_eth_vhost_get_vid_from_port_id returns a value of 0 if called before
> > the first call to the new_device callback. A vid value >=0 suggests the
> > device is active which is not the case in this instance. Initialise vid
> > to a negative value to prevent this.
> >
> > Signed-off-by: Ciara Loftus <ciara.loftus at intel.com>
> > ---
> > drivers/net/vhost/rte_eth_vhost.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/net/vhost/rte_eth_vhost.c
> b/drivers/net/vhost/rte_eth_vhost.c
> > index 99a7727..f47950c 100644
> > --- a/drivers/net/vhost/rte_eth_vhost.c
> > +++ b/drivers/net/vhost/rte_eth_vhost.c
> > @@ -1051,6 +1051,7 @@ eth_rx_queue_setup(struct rte_eth_dev *dev,
> uint16_t rx_queue_id,
> > return -ENOMEM;
> > }
> >
> > + vq->vid = -1;
> > vq->mb_pool = mb_pool;
> > vq->virtqueue_id = rx_queue_id * VIRTIO_QNUM + VIRTIO_TXQ;
> > dev->data->rx_queues[rx_queue_id] = vq;
> >
>
> Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>
>
> Thanks,
> Maxime
On second thoughts, self-NACK.
We need to provision for the case where we want to call eth_rx_queue_setup AFTER new_device. For instance when we want to change the mb_pool. In this case we need to maintain the same vid and not reset it to -1.
Without this patch the original problem still exists and need to find an alternative workaround.
Thanks,
Ciara
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