[PATCH v1 1/9] xprtrdma: Eliminate ri_max_send_sges

[Chuck Lever <chuck.lever@xxxxxxxxxx>]

Clean-up. The max_send_sge value also happens to be stored in
ep->rep_attr. Let's keep just a single copy.

Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
 net/sunrpc/xprtrdma/frwr_ops.c  |   10 ++++++++++
 net/sunrpc/xprtrdma/rpc_rdma.c  |    2 +-
 net/sunrpc/xprtrdma/verbs.c     |   17 +++--------------
 net/sunrpc/xprtrdma/xprt_rdma.h |    1 -
 4 files changed, 14 insertions(+), 16 deletions(-)

diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c
index 50025408dc2a..24b8b75d0d49 100644
--- a/net/sunrpc/xprtrdma/frwr_ops.c
+++ b/net/sunrpc/xprtrdma/frwr_ops.c
@@ -183,6 +183,16 @@ int frwr_open(struct rpcrdma_ia *ia, struct rpcrdma_ep *ep)
 {
 	struct ib_device_attr *attrs = &ia->ri_id->device->attrs;
 	int max_qp_wr, depth, delta;
+	unsigned int max_sge;
+
+	max_sge = min_t(unsigned int, attrs->max_send_sge,
+			RPCRDMA_MAX_SEND_SGES);
+	if (max_sge < RPCRDMA_MIN_SEND_SGES) {
+		pr_err("rpcrdma: HCA provides only %u send SGEs\n", max_sge);
+		return -ENOMEM;
+	}
+	ep->rep_attr.cap.max_send_sge = max_sge;
+	ep->rep_attr.cap.max_recv_sge = 1;
 
 	ia->ri_mrtype = IB_MR_TYPE_MEM_REG;
 	if (attrs->device_cap_flags & IB_DEVICE_SG_GAPS_REG)
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index aec3beb93b25..af917228d245 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -145,7 +145,7 @@ static bool rpcrdma_args_inline(struct rpcrdma_xprt *r_xprt,
 			remaining -= min_t(unsigned int,
 					   PAGE_SIZE - offset, remaining);
 			offset = 0;
-			if (++count > r_xprt->rx_ia.ri_max_send_sges)
+			if (++count > r_xprt->rx_ep.rep_attr.cap.max_send_sge)
 				return false;
 		}
 	}
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 4d7d7555569c..0ad81d3c735e 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -469,21 +469,12 @@ int rpcrdma_ep_create(struct rpcrdma_xprt *r_xprt)
 	struct rpcrdma_ia *ia = &r_xprt->rx_ia;
 	struct rpcrdma_connect_private *pmsg = &ep->rep_cm_private;
 	struct ib_cq *sendcq, *recvcq;
-	unsigned int max_sge;
 	int rc;
 
 	ep->rep_max_requests = xprt_rdma_slot_table_entries;
 	ep->rep_inline_send = xprt_rdma_max_inline_write;
 	ep->rep_inline_recv = xprt_rdma_max_inline_read;
 
-	max_sge = min_t(unsigned int, ia->ri_id->device->attrs.max_send_sge,
-			RPCRDMA_MAX_SEND_SGES);
-	if (max_sge < RPCRDMA_MIN_SEND_SGES) {
-		pr_warn("rpcrdma: HCA provides only %d send SGEs\n", max_sge);
-		return -ENOMEM;
-	}
-	ia->ri_max_send_sges = max_sge;
-
 	rc = frwr_open(ia, ep);
 	if (rc)
 		return rc;
@@ -491,8 +482,6 @@ int rpcrdma_ep_create(struct rpcrdma_xprt *r_xprt)
 	ep->rep_attr.event_handler = rpcrdma_qp_event_handler;
 	ep->rep_attr.qp_context = ep;
 	ep->rep_attr.srq = NULL;
-	ep->rep_attr.cap.max_send_sge = max_sge;
-	ep->rep_attr.cap.max_recv_sge = 1;
 	ep->rep_attr.cap.max_inline_data = 0;
 	ep->rep_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
 	ep->rep_attr.qp_type = IB_QPT_RC;
@@ -795,11 +784,11 @@ static void rpcrdma_sendctxs_destroy(struct rpcrdma_buffer *buf)
 	kfree(buf->rb_sc_ctxs);
 }
 
-static struct rpcrdma_sendctx *rpcrdma_sendctx_create(struct rpcrdma_ia *ia)
+static struct rpcrdma_sendctx *rpcrdma_sendctx_create(struct rpcrdma_ep *ep)
 {
 	struct rpcrdma_sendctx *sc;
 
-	sc = kzalloc(struct_size(sc, sc_sges, ia->ri_max_send_sges),
+	sc = kzalloc(struct_size(sc, sc_sges, ep->rep_attr.cap.max_send_sge),
 		     GFP_KERNEL);
 	if (!sc)
 		return NULL;
@@ -827,7 +816,7 @@ static int rpcrdma_sendctxs_create(struct rpcrdma_xprt *r_xprt)
 
 	buf->rb_sc_last = i - 1;
 	for (i = 0; i <= buf->rb_sc_last; i++) {
-		sc = rpcrdma_sendctx_create(&r_xprt->rx_ia);
+		sc = rpcrdma_sendctx_create(&r_xprt->rx_ep);
 		if (!sc)
 			return -ENOMEM;
 
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index d796d68609ed..7655a99fd559 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -73,7 +73,6 @@ struct rpcrdma_ia {
 	int			ri_async_rc;
 	unsigned int		ri_max_segs;
 	unsigned int		ri_max_frwr_depth;
-	unsigned int		ri_max_send_sges;
 	bool			ri_implicit_roundup;
 	enum ib_mr_type		ri_mrtype;
 	unsigned long		ri_flags;