Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Pull rdma updates from Jason Gunthorpe:
 "This is significantly bug fixes and general cleanups. The noteworthy
  new features are fairly small:

   - XRC support for HNS and improves RQ operations

   - Bug fixes and updates for hns, mlx5, bnxt_re, hfi1, i40iw, rxe, siw
     and qib

   - Quite a few general cleanups on spelling, error handling, static
     checker detections, etc

   - Increase the number of device ports supported beyond 255. High port
     count software switches now exist

   - Several bug fixes for rtrs

   - mlx5 Device Memory support for host controlled atomics

   - Report SRQ tables through to rdma-tool"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (145 commits)
  IB/qib: Remove redundant assignment to ret
  RDMA/nldev: Add copy-on-fork attribute to get sys command
  RDMA/bnxt_re: Fix a double free in bnxt_qplib_alloc_res
  RDMA/siw: Fix a use after free in siw_alloc_mr
  IB/hfi1: Remove redundant variable rcd
  RDMA/nldev: Add QP numbers to SRQ information
  RDMA/nldev: Return SRQ information
  RDMA/restrack: Add support to get resource tracking for SRQ
  RDMA/nldev: Return context information
  RDMA/core: Add CM to restrack after successful attachment to a device
  RDMA/cma: Skip device which doesn't support CM
  RDMA/rxe: Fix a bug in rxe_fill_ip_info()
  RDMA/mlx5: Expose private query port
  RDMA/mlx4: Remove an unused variable
  RDMA/mlx5: Fix type assignment for ICM DM
  IB/mlx5: Set right RoCE l3 type and roce version while deleting GID
  RDMA/i40iw: Fix error unwinding when i40iw_hmc_sd_one fails
  RDMA/cxgb4: add missing qpid increment
  IB/ipoib: Remove unnecessary struct declaration
  RDMA/bnxt_re: Get rid of custom module reference counting
  ...

2 files changed, 2 insertions, 34 deletions

diff --git a/net/rds/ib_cm.c b/net/rds/ib_cm.c
index f5cbe963cd8f..26b069e1999d 100644
--- a/net/rds/ib_cm.c
+++ b/net/rds/ib_cm.c
@@ -68,31 +68,6 @@ static void rds_ib_set_flow_control(struct rds_connection *conn, u32 credits)
 }
 
 /*
- * Tune RNR behavior. Without flow control, we use a rather
- * low timeout, but not the absolute minimum - this should
- * be tunable.
- *
- * We already set the RNR retry count to 7 (which is the
- * smallest infinite number :-) above.
- * If flow control is off, we want to change this back to 0
- * so that we learn quickly when our credit accounting is
- * buggy.
- *
- * Caller passes in a qp_attr pointer - don't waste stack spacv
- * by allocation this twice.
- */
-static void
-rds_ib_tune_rnr(struct rds_ib_connection *ic, struct ib_qp_attr *attr)
-{
-	int ret;
-
-	attr->min_rnr_timer = IB_RNR_TIMER_000_32;
-	ret = ib_modify_qp(ic->i_cm_id->qp, attr, IB_QP_MIN_RNR_TIMER);
-	if (ret)
-		printk(KERN_NOTICE "ib_modify_qp(IB_QP_MIN_RNR_TIMER): err=%d\n", -ret);
-}
-
-/*
  * Connection established.
  * We get here for both outgoing and incoming connection.
  */
@@ -100,7 +75,6 @@ void rds_ib_cm_connect_complete(struct rds_connection *conn, struct rdma_cm_even
 {
 	struct rds_ib_connection *ic = conn->c_transport_data;
 	const union rds_ib_conn_priv *dp = NULL;
-	struct ib_qp_attr qp_attr;
 	__be64 ack_seq = 0;
 	__be32 credit = 0;
 	u8 major = 0;
@@ -168,14 +142,6 @@ void rds_ib_cm_connect_complete(struct rds_connection *conn, struct rdma_cm_even
 	 * the posted credit count. */
 	rds_ib_recv_refill(conn, 1, GFP_KERNEL);
 
-	/* Tune RNR behavior */
-	rds_ib_tune_rnr(ic, &qp_attr);
-
-	qp_attr.qp_state = IB_QPS_RTS;
-	err = ib_modify_qp(ic->i_cm_id->qp, &qp_attr, IB_QP_STATE);
-	if (err)
-		printk(KERN_NOTICE "ib_modify_qp(IB_QP_STATE, RTS): err=%d\n", err);
-
 	/* update ib_device with this local ipaddr */
 	err = rds_ib_update_ipaddr(ic->rds_ibdev, &conn->c_laddr);
 	if (err)
@@ -947,6 +913,7 @@ int rds_ib_cm_handle_connect(struct rdma_cm_id *cm_id,
 				  event->param.conn.responder_resources,
 				  event->param.conn.initiator_depth, isv6);
 
+	rdma_set_min_rnr_timer(cm_id, IB_RNR_TIMER_000_32);
 	/* rdma_accept() calls rdma_reject() internally if it fails */
 	if (rdma_accept(cm_id, &conn_param))
 		rds_ib_conn_error(conn, "rdma_accept failed\n");
diff --git a/net/rds/rdma_transport.c b/net/rds/rdma_transport.c
index 5f741e51b4ba..a9e4ff948a7d 100644
--- a/net/rds/rdma_transport.c
+++ b/net/rds/rdma_transport.c
@@ -87,6 +87,7 @@ static int rds_rdma_cm_event_handler_cmn(struct rdma_cm_id *cm_id,
 
 	case RDMA_CM_EVENT_ADDR_RESOLVED:
 		rdma_set_service_type(cm_id, conn->c_tos);
+		rdma_set_min_rnr_timer(cm_id, IB_RNR_TIMER_000_32);
 		/* XXX do we need to clean up if this fails? */
 		ret = rdma_resolve_route(cm_id,
 					 RDS_RDMA_RESOLVE_TIMEOUT_MS);