linux-kernel - [PATCH 16/18] mtd-cfi_cmdset_0020: Use kmalloc_array() in cfi_staa

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Message-ID: <927b2449-3de4-83aa-8d23-ef0a6461ecfe@users.sourceforge.net>
Date:   Wed, 11 Jan 2017 21:51:25 +0100
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-mtd@...ts.infradead.org,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Brian Norris <computersforpeace@...il.com>,
        Cyrille Pitchen <cyrille.pitchen@...el.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 16/18] mtd-cfi_cmdset_0020: Use kmalloc_array() in
 cfi_staa_setup()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Wed, 11 Jan 2017 19:33:48 +0100

* A multiplication for the size determination of a memory allocation
  indicated that an array data structure should be processed.
  Thus use the corresponding function "kmalloc_array".

  This issue was detected by using the Coccinelle software.

* Replace the specification of a data structure by a pointer dereference
  to make the corresponding size determination a bit safer according to
  the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/mtd/chips/cfi_cmdset_0020.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/chips/cfi_cmdset_0020.c b/drivers/mtd/chips/cfi_cmdset_0020.c
index 94d3eb42c4d5..9cd7b1c6faba 100644
--- a/drivers/mtd/chips/cfi_cmdset_0020.c
+++ b/drivers/mtd/chips/cfi_cmdset_0020.c
@@ -184,8 +184,9 @@ static struct mtd_info *cfi_staa_setup(struct map_info *map)
 	mtd->size = devsize * cfi->numchips;
 
 	mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips;
-	mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info)
-			* mtd->numeraseregions, GFP_KERNEL);
+	mtd->eraseregions = kmalloc_array(mtd->numeraseregions,
+					  sizeof(*mtd->eraseregions),
+					  GFP_KERNEL);
 	if (!mtd->eraseregions) {
 		kfree(cfi->cmdset_priv);
 		kfree(mtd);
-- 
2.11.0