From: Leon Romanovsky <leonro@mellanox.com>
Date: Sun, 11 Mar 2018 13:51:35 +0200
Subject: RDMA/verbs: Simplify modify QP check
Patch-mainline: v4.17-rc1
Git-commit: 19b1f54099b6ee334acbfbcfbdffd1d1f057216d
References: bsc#1103992 FATE#326009

All callers to ib_modify_qp_is_ok() provides enum ib_qp_state
makes the checks of out-of-scope redundant. Let's remove them
together with updating function signature to return boolean result.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/core/verbs.c |   20 ++++++++------------
 include/rdma/ib_verbs.h         |    6 +++---
 2 files changed, 11 insertions(+), 15 deletions(-)

--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -1264,34 +1264,30 @@ static const struct {
 	}
 };
 
-int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
-		       enum ib_qp_type type, enum ib_qp_attr_mask mask,
-		       enum rdma_link_layer ll)
+bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
+			enum ib_qp_type type, enum ib_qp_attr_mask mask,
+			enum rdma_link_layer ll)
 {
 	enum ib_qp_attr_mask req_param, opt_param;
 
-	if (cur_state  < 0 || cur_state  > IB_QPS_ERR ||
-	    next_state < 0 || next_state > IB_QPS_ERR)
-		return 0;
-
 	if (mask & IB_QP_CUR_STATE  &&
 	    cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
 	    cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
-		return 0;
+		return false;
 
 	if (!qp_state_table[cur_state][next_state].valid)
-		return 0;
+		return false;
 
 	req_param = qp_state_table[cur_state][next_state].req_param[type];
 	opt_param = qp_state_table[cur_state][next_state].opt_param[type];
 
 	if ((mask & req_param) != req_param)
-		return 0;
+		return false;
 
 	if (mask & ~(req_param | opt_param | IB_QP_STATE))
-		return 0;
+		return false;
 
-	return 1;
+	return true;
 }
 EXPORT_SYMBOL(ib_modify_qp_is_ok);
 
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -2476,9 +2476,9 @@ static inline bool ib_is_udata_cleared(s
  * transition from cur_state to next_state is allowed by the IB spec,
  * and that the attribute mask supplied is allowed for the transition.
  */
-int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
-		       enum ib_qp_type type, enum ib_qp_attr_mask mask,
-		       enum rdma_link_layer ll);
+bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
+			enum ib_qp_type type, enum ib_qp_attr_mask mask,
+			enum rdma_link_layer ll);
 
 void ib_register_event_handler(struct ib_event_handler *event_handler);
 void ib_unregister_event_handler(struct ib_event_handler *event_handler);