Set MTU size to ~4k until the TX path is ready to deal with larger packets

diff --git a/sys/dev/pv/if_xnf.c b/sys/dev/pv/if_xnf.c
index a128899..ccc5b57 100644 (file)
--- a/sys/dev/pv/if_xnf.c
+++ b/sys/dev/pv/if_xnf.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: if_xnf.c,v 1.33 2016/08/29 17:27:04 mikeb Exp $       */
+/*     $OpenBSD: if_xnf.c,v 1.34 2016/08/29 17:35:25 mikeb Exp $       */
 
 /*
  * Copyright (c) 2015, 2016 Mike Belopuhov
@@ -290,7 +290,7 @@ xnf_attach(struct device *parent, struct device *self, void *aux)
        ifp->if_softc = sc;
 
        if (sc->sc_caps & XNF_CAP_SG)
-               ifp->if_hardmtu = 9000;
+               ifp->if_hardmtu = XNF_MCLEN - ETHER_HDR_LEN;
 
        ifp->if_capabilities = IFCAP_VLAN_MTU;
        if (sc->sc_caps & XNF_CAP_CSUM4)