net/virtio-user: strip MAC feature when none specified

Currently VIRTIO_NET_F_MAC is set unconditionally when server
mode is used. It should be stripped when MAC isn't specified.

Fixes: bd8f50a45d0f ("net/virtio-user: support server mode")

Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c
index 566c325..aff01f5 100644 (file)
--- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
+++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
@@ -421,6 +421,8 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
 
        if (dev->mac_specified)
                dev->device_features |= (1ull << VIRTIO_NET_F_MAC);
+       else
+               dev->device_features &= ~(1ull << VIRTIO_NET_F_MAC);
 
        if (cq) {
                /* device does not really need to know anything about CQ,