linux-kernel - [PATCH] scsi: Use vmalloc_array and vcalloc to simplify code

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Message-Id: <20250804063652.104424-1-rongqianfeng@vivo.com>
Date: Mon,  4 Aug 2025 14:36:52 +0800
From: Qianfeng Rong <rongqianfeng@...o.com>
To: Brian King <brking@...ibm.com>,
	"James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Qianfeng Rong <rongqianfeng@...o.com>
Subject: [PATCH] scsi: Use vmalloc_array and vcalloc to simplify code

Use vmalloc_array() instead of vmalloc() to simplify the functions
ipr_alloc_dump().

Use vcalloc() instead of vmalloc() followed by bitmap_zero() to simplify
the functions sdebug_add_store().

Compile-tested only.

Signed-off-by: Qianfeng Rong <rongqianfeng@...o.com>
---
 drivers/scsi/ipr.c        | 8 ++++----
 drivers/scsi/scsi_debug.c | 6 ++----
 2 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index d06b79f03538..4fb5654472d8 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -4281,11 +4281,11 @@ static int ipr_alloc_dump(struct ipr_ioa_cfg *ioa_cfg)
 	}
 
 	if (ioa_cfg->sis64)
-		ioa_data = vmalloc(array_size(IPR_FMT3_MAX_NUM_DUMP_PAGES,
-					      sizeof(__be32 *)));
+		ioa_data = vmalloc_array(IPR_FMT3_MAX_NUM_DUMP_PAGES,
+					 sizeof(__be32 *));
 	else
-		ioa_data = vmalloc(array_size(IPR_FMT2_MAX_NUM_DUMP_PAGES,
-					      sizeof(__be32 *)));
+		ioa_data = vmalloc_array(IPR_FMT2_MAX_NUM_DUMP_PAGES,
+					 sizeof(__be32 *));
 
 	if (!ioa_data) {
 		ipr_err("Dump memory allocation failed\n");
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 353cb60e1abe..14e2d6e94dd2 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -8805,8 +8805,8 @@ static int sdebug_add_store(void)
 	/* Logical Block Provisioning */
 	if (scsi_debug_lbp()) {
 		map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
-		sip->map_storep = vmalloc(array_size(sizeof(long),
-						     BITS_TO_LONGS(map_size)));
+		sip->map_storep = vcalloc(BITS_TO_LONGS(map_size),
+					  sizeof(long));
 
 		pr_info("%lu provisioning blocks\n", map_size);
 
@@ -8815,8 +8815,6 @@ static int sdebug_add_store(void)
 			goto err;
 		}
 
-		bitmap_zero(sip->map_storep, map_size);
-
 		/* Map first 1KB for partition table */
 		if (sdebug_num_parts)
 			map_region(sip, 0, 2);
-- 
2.34.1