tap: Remove qemu_using_vnet_hdr()

Since qemu_set_vnet_hdr_len() is always called when
qemu_using_vnet_hdr() is called, we can merge them and save some code.

For consistency, express that the virtio-net header is not in use by
returning 0 with qemu_get_vnet_hdr_len() instead of having a dedicated
function, qemu_get_using_vnet_hdr().

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

1 files changed, 0 insertions, 3 deletions

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 24e5e7d347..ff600b3002 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -3778,9 +3778,6 @@ static void virtio_net_device_realize(DeviceState *dev, Error **errp)
 
     peer_test_vnet_hdr(n);
     if (peer_has_vnet_hdr(n)) {
-        for (i = 0; i < n->max_queue_pairs; i++) {
-            qemu_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true);
-        }
         n->host_hdr_len = sizeof(struct virtio_net_hdr);
     } else {
         n->host_hdr_len = 0;