svcrdma: Rename tracepoints that record header decoding errors

Clean up: Use a consistent naming convention so that these trace
points can be enabled quickly via a glob.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

include/trace/events/rpcrdma.h

@@ -1355,7 +1355,7 @@ TRACE_EVENT(svcrdma_decode_rqst,
 		show_rpcrdma_proc(__entry->proc), __entry->hdrlen)
 );
 
-TRACE_EVENT(svcrdma_decode_short,
+TRACE_EVENT(svcrdma_decode_short_err,
 	TP_PROTO(
 		unsigned int hdrlen
 	),
@@ -1399,7 +1399,8 @@ DECLARE_EVENT_CLASS(svcrdma_badreq_event,
 );
 
 #define DEFINE_BADREQ_EVENT(name)					\
-		DEFINE_EVENT(svcrdma_badreq_event, svcrdma_decode_##name,\
+		DEFINE_EVENT(svcrdma_badreq_event,			\
+			     svcrdma_decode_##name##_err,		\
 				TP_PROTO(				\
 					__be32 *p			\
 				),					\

net/sunrpc/xprtrdma/svc_rdma_recvfrom.c

@@ -665,23 +665,23 @@ static int svc_rdma_xdr_decode_req(struct xdr_buf *rq_arg,
 	return hdr_len;
 
 out_short:
-	trace_svcrdma_decode_short(rq_arg->len);
+	trace_svcrdma_decode_short_err(rq_arg->len);
 	return -EINVAL;
 
 out_version:
-	trace_svcrdma_decode_badvers(rdma_argp);
+	trace_svcrdma_decode_badvers_err(rdma_argp);
 	return -EPROTONOSUPPORT;
 
 out_drop:
-	trace_svcrdma_decode_drop(rdma_argp);
+	trace_svcrdma_decode_drop_err(rdma_argp);
 	return 0;
 
 out_proc:
-	trace_svcrdma_decode_badproc(rdma_argp);
+	trace_svcrdma_decode_badproc_err(rdma_argp);
 	return -EINVAL;
 
 out_inval:
-	trace_svcrdma_decode_parse(rdma_argp);
+	trace_svcrdma_decode_parse_err(rdma_argp);
 	return -EINVAL;
 }