net/virtio: fix queue notify

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@dpdk.org
Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>

diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
index ce9a9d3..b767c03 100644 (file)
--- a/drivers/net/virtio/virtio_pci.c
+++ b/drivers/net/virtio/virtio_pci.c
@@ -504,7 +504,7 @@ modern_del_queue(struct virtio_hw *hw, struct virtqueue *vq)
 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);
 }
 
 const struct virtio_pci_ops modern_ops = {