svcrdma: Move the svc_rdma_cc_init() call

Now that the chunk_ctxt for Reads is no longer dynamically allocated
it can be initialized once for the life of the object that contains
it (struct svc_rdma_recv_ctxt).

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Author: chucklever

include/linux/sunrpc/svc_rdma.h

@@ -211,6 +211,8 @@ extern int svc_rdma_recvfrom(struct svc_rqst *);
 
 /* svc_rdma_rw.c */
 extern void svc_rdma_destroy_rw_ctxts(struct svcxprt_rdma *rdma);
+extern void svc_rdma_cc_init(struct svcxprt_rdma *rdma,
+			     struct svc_rdma_chunk_ctxt *cc);
 extern int svc_rdma_send_write_chunk(struct svcxprt_rdma *rdma,
 				     const struct svc_rdma_chunk *chunk,
 				     const struct xdr_buf *xdr);

net/sunrpc/xprtrdma/svc_rdma_recvfrom.c

@@ -156,6 +156,7 @@ svc_rdma_recv_ctxt_alloc(struct svcxprt_rdma *rdma)
 	ctxt->rc_recv_sge.length = rdma->sc_max_req_size;
 	ctxt->rc_recv_sge.lkey = rdma->sc_pd->local_dma_lkey;
 	ctxt->rc_recv_buf = buffer;
+	svc_rdma_cc_init(rdma, &ctxt->rc_cc);
 	return ctxt;
 
 fail2:

net/sunrpc/xprtrdma/svc_rdma_rw.c

@@ -153,8 +153,13 @@ static void svc_rdma_cc_cid_init(struct svcxprt_rdma *rdma,
 	cid->ci_completion_id = atomic_inc_return(&rdma->sc_completion_ids);
 }
 
-static void svc_rdma_cc_init(struct svcxprt_rdma *rdma,
-			     struct svc_rdma_chunk_ctxt *cc)
+/**
+ * svc_rdma_cc_init - Initialize an svc_rdma_chunk_ctxt
+ * @rdma: controlling transport instance
+ * @cc: svc_rdma_chunk_ctxt to be initialized
+ */
+void svc_rdma_cc_init(struct svcxprt_rdma *rdma,
+		      struct svc_rdma_chunk_ctxt *cc)
 {
 	svc_rdma_cc_cid_init(rdma, &cc->cc_cid);
 
@@ -1101,8 +1106,8 @@ int svc_rdma_process_read_list(struct svcxprt_rdma *rdma,
 	struct svc_rdma_chunk_ctxt *cc = &head->rc_cc;
 	int ret;
 
-	svc_rdma_cc_init(rdma, cc);
 	cc->cc_cqe.done = svc_rdma_wc_read_done;
+	cc->cc_sqecount = 0;
 	head->rc_pageoff = 0;
 	head->rc_curpage = 0;
 	head->rc_readbytes = 0;