"svc_xprt_get()" should be invoked before adding "xprt" onto "pool" by
"svc_xprt_enqueue()".
Otherwise "xprt->xpt_ref" can drop to 0 due to race conditions.

Signed-off-by: Zoltan Menyhart <Zoltan.Menyhart@bull.net>

--- old/net/sunrpc/svc_xprt.c	2010-10-05 09:47:51.000000000 +0200
+++ new/net/sunrpc/svc_xprt.c	2010-10-05 09:47:20.000000000 +0200
@@ -369,6 +369,7 @@
 	}
 
  process:
+	svc_xprt_get(xprt);
 	if (!list_empty(&pool->sp_threads)) {
 		rqstp = list_entry(pool->sp_threads.next,
 				   struct svc_rqst,
@@ -381,7 +382,6 @@
 				"svc_xprt_enqueue: server %p, rq_xprt=%p!\n",
 				rqstp, rqstp->rq_xprt);
 		rqstp->rq_xprt = xprt;
-		svc_xprt_get(xprt);
 		rqstp->rq_reserved = serv->sv_max_mesg;
 		atomic_add(rqstp->rq_reserved, &xprt->xpt_reserved);
 		pool->sp_stats.threads_woken++;
@@ -655,7 +655,6 @@
 	xprt = svc_xprt_dequeue(pool);
 	if (xprt) {
 		rqstp->rq_xprt = xprt;
-		svc_xprt_get(xprt);
 		rqstp->rq_reserved = serv->sv_max_mesg;
 		atomic_add(rqstp->rq_reserved, &xprt->xpt_reserved);
 	} else {