vhost-vdpa: don't cleanup twice in vhost_vdpa_add()

The previous vhost_net_cleanup is sufficient for freeing, calling
vhost_vdpa_del() in this case will lead an extra round of free. Note
that this kind of "double free" is safe since vhost_dev_cleanup() zero
the whole structure.

Reviewed-by: Stefano Garzarella <[email protected]>
Signed-off-by: Jason Wang <[email protected]>
Message-Id: <[email protected]>
Reviewed-by: Michael S. Tsirkin <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>

Author: jasowang

net/vhost-vdpa.c

@@ -81,16 +81,6 @@ static int vhost_vdpa_net_check_device_id(struct vhost_net *net)
     return ret;
 }
 
-static void vhost_vdpa_del(NetClientState *ncs)
-{
-    VhostVDPAState *s;
-    assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
-    s = DO_UPCAST(VhostVDPAState, nc, ncs);
-    if (s->vhost_net) {
-        vhost_net_cleanup(s->vhost_net);
-    }
-}
-
 static int vhost_vdpa_add(NetClientState *ncs, void *be)
 {
     VhostNetOptions options;
@@ -121,7 +111,6 @@ static int vhost_vdpa_add(NetClientState *ncs, void *be)
     if (net) {
         vhost_net_cleanup(net);
     }
-    vhost_vdpa_del(ncs);
     return -1;
 }