linux-kernel - [PATCH 2/3] scsi: qedf: Simplify 'qedf_alloc_global

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Date:   Sun, 23 May 2021 13:02:36 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     skashyap@...vell.com, jhasan@...vell.com,
        GR-QLogic-Storage-Upstream@...vell.com, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, chad.dupuis@...ium.com,
        arun.easi@...ium.com, nilesh.javali@...ium.com
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH 2/3] scsi: qedf: Simplify 'qedf_alloc_global_queues()'

In 'qedf_alloc_global_queues()', 'qedf->global_queues[i]', is used many
times. Use an intermediate variable with a much shorter name, 'q', to
simplify and make the code more readable.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/scsi/qedf/qedf_main.c | 53 +++++++++++++++--------------------
 1 file changed, 22 insertions(+), 31 deletions(-)

diff --git a/drivers/scsi/qedf/qedf_main.c b/drivers/scsi/qedf/qedf_main.c
index ff3a1b183a7c..3b80d4298f15 100644
--- a/drivers/scsi/qedf/qedf_main.c
+++ b/drivers/scsi/qedf/qedf_main.c
@@ -3045,55 +3045,46 @@ static int qedf_alloc_global_queues(struct qedf_ctx *qedf)
 
 	/* Allocate a CQ and an associated PBL for each MSI-X vector */
 	for (i = 0; i < qedf->num_queues; i++) {
-		qedf->global_queues[i] = kzalloc(sizeof(struct global_queue),
-		    GFP_KERNEL);
-		if (!qedf->global_queues[i]) {
+		struct global_queue *q;
+
+		q = kzalloc(sizeof(*q), GFP_KERNEL);
+		if (!q) {
 			QEDF_WARN(&(qedf->dbg_ctx), "Unable to allocate "
 				   "global queue %d.\n", i);
 			status = -ENOMEM;
 			goto mem_alloc_failure;
 		}
+		qedf->global_queues[i] = q;
 
-		qedf->global_queues[i]->cq_mem_size =
+		q->cq_mem_size =
 		    FCOE_PARAMS_CQ_NUM_ENTRIES * sizeof(struct fcoe_cqe);
-		qedf->global_queues[i]->cq_mem_size =
-		    ALIGN(qedf->global_queues[i]->cq_mem_size, QEDF_PAGE_SIZE);
-
-		qedf->global_queues[i]->cq_pbl_size =
-		    (qedf->global_queues[i]->cq_mem_size /
-		    PAGE_SIZE) * sizeof(void *);
-		qedf->global_queues[i]->cq_pbl_size =
-		    ALIGN(qedf->global_queues[i]->cq_pbl_size, QEDF_PAGE_SIZE);
-
-		qedf->global_queues[i]->cq =
-		    dma_alloc_coherent(&qedf->pdev->dev,
-				       qedf->global_queues[i]->cq_mem_size,
-				       &qedf->global_queues[i]->cq_dma,
-				       GFP_KERNEL);
-
-		if (!qedf->global_queues[i]->cq) {
+		q->cq_mem_size = ALIGN(q->cq_mem_size, QEDF_PAGE_SIZE);
+
+		q->cq_pbl_size = (q->cq_mem_size / PAGE_SIZE) * sizeof(void *);
+		q->cq_pbl_size = ALIGN(q->cq_pbl_size, QEDF_PAGE_SIZE);
+
+		q->cq = dma_alloc_coherent(&qedf->pdev->dev, q->cq_mem_size,
+					   &q->cq_dma, GFP_KERNEL);
+
+		if (!q->cq) {
 			QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate cq.\n");
 			status = -ENOMEM;
 			goto mem_alloc_failure;
 		}
 
-		qedf->global_queues[i]->cq_pbl =
-		    dma_alloc_coherent(&qedf->pdev->dev,
-				       qedf->global_queues[i]->cq_pbl_size,
-				       &qedf->global_queues[i]->cq_pbl_dma,
-				       GFP_KERNEL);
+		q->cq_pbl = dma_alloc_coherent(&qedf->pdev->dev, q->cq_pbl_size,
+					       &q->cq_pbl_dma, GFP_KERNEL);
 
-		if (!qedf->global_queues[i]->cq_pbl) {
+		if (!q->cq_pbl) {
 			QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate cq PBL.\n");
 			status = -ENOMEM;
 			goto mem_alloc_failure;
 		}
 
 		/* Create PBL */
-		num_pages = qedf->global_queues[i]->cq_mem_size /
-		    QEDF_PAGE_SIZE;
-		page = qedf->global_queues[i]->cq_dma;
-		pbl = (u32 *)qedf->global_queues[i]->cq_pbl;
+		num_pages = q->cq_mem_size / QEDF_PAGE_SIZE;
+		page = q->cq_dma;
+		pbl = (u32 *)q->cq_pbl;
 
 		while (num_pages--) {
 			*pbl = U64_LO(page);
@@ -3103,7 +3094,7 @@ static int qedf_alloc_global_queues(struct qedf_ctx *qedf)
 			page += QEDF_PAGE_SIZE;
 		}
 		/* Set the initial consumer index for cq */
-		qedf->global_queues[i]->cq_cons_idx = 0;
+		q->cq_cons_idx = 0;
 	}
 
 	list = (u32 *)qedf->p_cpuq;
-- 
2.30.2