linux-kernel - [PATCH 18/26] IB/ocrdma: Use kcalloc() in three functions

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Date:   Wed, 8 Mar 2017 14:19:23 +0100
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-rdma@...r.kernel.org,
        Devesh Sharma <devesh.sharma@...gotech.com>,
        Doug Ledford <dledford@...hat.com>,
        Hal Rosenstock <hal.rosenstock@...il.com>,
        Sean Hefty <sean.hefty@...el.com>,
        Selvin Xavier <selvin.xavier@...gotech.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 18/26] IB/ocrdma: Use kcalloc() in three functions

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Wed, 8 Mar 2017 09:19:47 +0100

* Multiplications for the size determination of memory allocations
  indicated that array data structures should be processed.
  Thus reuse the corresponding function "kcalloc".

  This issue was detected by using the Coccinelle software.

* Replace the specification of data types by pointer dereferences
  to make the corresponding size determinations a bit safer according to
  the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/infiniband/hw/ocrdma/ocrdma_verbs.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
index ef670ac1cbe9..330617e1ef75 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
@@ -879,9 +879,8 @@ static int ocrdma_build_pbl_tbl(struct ocrdma_dev *dev, struct ocrdma_hw_mr *mr)
 	void *va;
 	dma_addr_t pa;
 
-	mr->pbl_table = kzalloc(sizeof(struct ocrdma_pbl) *
-				mr->num_pbls, GFP_KERNEL);
-
+	mr->pbl_table = kcalloc(mr->num_pbls, sizeof(*mr->pbl_table),
+				GFP_KERNEL);
 	if (!mr->pbl_table)
 		return -ENOMEM;
 
@@ -1362,13 +1361,12 @@ static void ocrdma_set_qp_db(struct ocrdma_dev *dev, struct ocrdma_qp *qp,
 
 static int ocrdma_alloc_wr_id_tbl(struct ocrdma_qp *qp)
 {
-	qp->wqe_wr_id_tbl =
-	    kzalloc(sizeof(*(qp->wqe_wr_id_tbl)) * qp->sq.max_cnt,
-		    GFP_KERNEL);
+	qp->wqe_wr_id_tbl = kcalloc(qp->sq.max_cnt, sizeof(*qp->wqe_wr_id_tbl),
+				    GFP_KERNEL);
 	if (qp->wqe_wr_id_tbl == NULL)
 		return -ENOMEM;
-	qp->rqe_wr_id_tbl =
-	    kzalloc(sizeof(u64) * qp->rq.max_cnt, GFP_KERNEL);
+	qp->rqe_wr_id_tbl = kcalloc(qp->rq.max_cnt, sizeof(*qp->rqe_wr_id_tbl),
+				    GFP_KERNEL);
 	if (qp->rqe_wr_id_tbl == NULL)
 		return -ENOMEM;
 
@@ -1903,8 +1901,9 @@ struct ib_srq *ocrdma_create_srq(struct ib_pd *ibpd,
 		goto err;
 
 	if (udata == NULL) {
-		srq->rqe_wr_id_tbl = kzalloc(sizeof(u64) * srq->rq.max_cnt,
-			    GFP_KERNEL);
+		srq->rqe_wr_id_tbl = kcalloc(srq->rq.max_cnt,
+					     sizeof(*srq->rqe_wr_id_tbl),
+					     GFP_KERNEL);
 		if (srq->rqe_wr_id_tbl == NULL)
 			goto arm_err;
 
-- 
2.12.0