linux-kernel - [PATCH 1/5] pinctrl: mvebu: Use kmalloc_array() in mvebu_pinctrl_dt_node_to

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Date:   Thu, 12 Jan 2017 17:31:44 +0100
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-gpio@...r.kernel.org, Laxman Dewangan <ldewangan@...dia.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 1/5] pinctrl: mvebu: Use kmalloc_array() in
 mvebu_pinctrl_dt_node_to_map()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Thu, 12 Jan 2017 16:00:15 +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/pinctrl/mvebu/pinctrl-mvebu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/mvebu/pinctrl-mvebu.c b/drivers/pinctrl/mvebu/pinctrl-mvebu.c
index b6ec6db78351..c2f74572ac01 100644
--- a/drivers/pinctrl/mvebu/pinctrl-mvebu.c
+++ b/drivers/pinctrl/mvebu/pinctrl-mvebu.c
@@ -398,7 +398,7 @@ static int mvebu_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
 		return 0;
 	}
 
-	*map = kmalloc(nmaps * sizeof(struct pinctrl_map), GFP_KERNEL);
+	*map = kmalloc_array(nmaps, sizeof(**map), GFP_KERNEL);
 	if (*map == NULL) {
 		dev_err(pctl->dev,
 			"cannot allocate pinctrl_map memory for %s\n",
-- 
2.11.0