svcrdma: Change svc_rdma_send_error return type to void

The svc_rdma_send_error function is called when an RPCRDMA protocol
error is detected. This function attempts to post an error reply message.
Since an error posting to a transport in error is ignored, change
the return type to void.
Signed-off-by: Tom Tucker <tom@opengridcomputing.com>

include/linux/sunrpc/svc_rdma.h

@@ -166,8 +166,8 @@ extern int svc_rdma_sendto(struct svc_rqst *);
 
 /* svc_rdma_transport.c */
 extern int svc_rdma_send(struct svcxprt_rdma *, struct ib_send_wr *);
-extern int svc_rdma_send_error(struct svcxprt_rdma *, struct rpcrdma_msg *,
-			       enum rpcrdma_errcode);
+extern void svc_rdma_send_error(struct svcxprt_rdma *, struct rpcrdma_msg *,
+				enum rpcrdma_errcode);
 struct page *svc_rdma_get_page(void);
 extern int svc_rdma_post_recv(struct svcxprt_rdma *);
 extern int svc_rdma_create_listen(struct svc_serv *, int, struct sockaddr *);

net/sunrpc/xprtrdma/svc_rdma_recvfrom.c

@@ -497,7 +497,7 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp)
 	/* If the request is invalid, reply with an error */
 	if (len < 0) {
 		if (len == -ENOSYS)
-			(void)svc_rdma_send_error(rdma_xprt, rmsgp, ERR_VERS);
+			svc_rdma_send_error(rdma_xprt, rmsgp, ERR_VERS);
 		goto close_out;
 	}
 

net/sunrpc/xprtrdma/svc_rdma_transport.c

@@ -1114,8 +1114,8 @@ int svc_rdma_send(struct svcxprt_rdma *xprt, struct ib_send_wr *wr)
 	return ret;
 }
 
-int svc_rdma_send_error(struct svcxprt_rdma *xprt, struct rpcrdma_msg *rmsgp,
-			enum rpcrdma_errcode err)
+void svc_rdma_send_error(struct svcxprt_rdma *xprt, struct rpcrdma_msg *rmsgp,
+			 enum rpcrdma_errcode err)
 {
 	struct ib_send_wr err_wr;
 	struct ib_sge sge;
@@ -1153,9 +1153,8 @@ int svc_rdma_send_error(struct svcxprt_rdma *xprt, struct rpcrdma_msg *rmsgp,
 	/* Post It */
 	ret = svc_rdma_send(xprt, &err_wr);
 	if (ret) {
-		dprintk("svcrdma: Error posting send = %d\n", ret);
+		dprintk("svcrdma: Error %d posting send for protocol error\n",
+			ret);
 		svc_rdma_put_context(ctxt, 1);
 	}
-
-	return ret;
 }