[PATCH] SUNRPC: Clear rq_xid when receiving a new RPC Call

[Chuck Lever <cel@xxxxxxxxxx>]

From: Chuck Lever <chuck.lever@xxxxxxxxxx>

This is an eye-catcher for tracepoints that record the XID: it means
the svc_rqst has not received a full RPC Call with an XID yet.

Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
 net/sunrpc/svc_xprt.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index e3952b690f54..3b9708b39e35 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -701,6 +701,8 @@ static int svc_alloc_arg(struct svc_rqst *rqstp)
 	arg->page_len = (pages-2)*PAGE_SIZE;
 	arg->len = (pages-1)*PAGE_SIZE;
 	arg->tail[0].iov_len = 0;
+
+	rqstp->rq_xid = xdr_zero;
 	return 0;
 }