--- linux/net/sunrpc/svc.c.orig	2006-03-15 10:30:17.537678000 +0000
+++ linux/net/sunrpc/svc.c	2006-03-15 10:34:53.329243000 +0000
@@ -308,6 +308,10 @@ svc_process(struct svc_serv *serv, struc
 	rqstp->rq_vers = vers = ntohl(svc_getu32(argv));	/* version number */
 	rqstp->rq_proc = proc = ntohl(svc_getu32(argv));	/* procedure number */
 
+	/* Accept NULL procedure call, which is probably a ping */
+	if (vers == 0 && prog == 0)
+		goto sendit;
+
 	progp = serv->sv_program;
 
 	for (progp = serv->sv_program; progp; progp = progp->pg_next)
@@ -462,7 +466,7 @@ err_bad_prog:
 
 err_bad_vers:
 #ifdef RPC_PARANOIA
-	printk("svc: unknown version (%d)\n", vers);
+	printk("svc: unknown version (%d) proc=%d\n", vers, proc);
 #endif
 	serv->sv_stats->rpcbadfmt++;
 	svc_putu32(resv, rpc_prog_mismatch);