virtio_net: Modify virtio_net_get_config to early return

Next patches introduce more code on vhost-vdpa branch, with already have
too much indentation.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221221115015.1400889-2-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 9cbdfa5547f9d481bb51656160d1c10ec0a42fff..b30038d1301f52889717ec326db32b4de665b831 100644 (file)
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -168,20 +168,22 @@ static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config)
     if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_VDPA) {
         ret = vhost_net_get_config(get_vhost_net(nc->peer), (uint8_t *)&netcfg,
                                    n->config_size);
-        if (ret != -1) {
-            /*
-             * Some NIC/kernel combinations present 0 as the mac address.  As
-             * that is not a legal address, try to proceed with the
-             * address from the QEMU command line in the hope that the
-             * address has been configured correctly elsewhere - just not
-             * reported by the device.
-             */
-            if (memcmp(&netcfg.mac, &zero, sizeof(zero)) == 0) {
-                info_report("Zero hardware mac address detected. Ignoring.");
-                memcpy(netcfg.mac, n->mac, ETH_ALEN);
-            }
-            memcpy(config, &netcfg, n->config_size);
+        if (ret == -1) {
+            return;
         }
+
+        /*
+         * Some NIC/kernel combinations present 0 as the mac address.  As that
+         * is not a legal address, try to proceed with the address from the
+         * QEMU command line in the hope that the address has been configured
+         * correctly elsewhere - just not reported by the device.
+         */
+        if (memcmp(&netcfg.mac, &zero, sizeof(zero)) == 0) {
+            info_report("Zero hardware mac address detected. Ignoring.");
+            memcpy(netcfg.mac, n->mac, ETH_ALEN);
+        }
+
+        memcpy(config, &netcfg, n->config_size);
     }
 }