linux-kernel - [PATCH 02/10] pinctrl: imx: Use devm

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Date:   Fri, 14 Apr 2017 11:07:53 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-gpio@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Gary Bisson <gary.bisson@...ndarydevices.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        Peng Fan <van.freenix@...il.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Vladimir Zapolskiy <vladimir_zapolskiy@...tor.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 02/10] pinctrl: imx: Use devm_kcalloc() in two functions

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Thu, 13 Apr 2017 14:13:00 +0200

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

  This issue was detected by using the Coccinelle software.

* Replace the specification of data types by pointer dereferences
  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/freescale/pinctrl-imx.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/pinctrl/freescale/pinctrl-imx.c b/drivers/pinctrl/freescale/pinctrl-imx.c
index 563d24e7989d..975ed40cb774 100644
--- a/drivers/pinctrl/freescale/pinctrl-imx.c
+++ b/drivers/pinctrl/freescale/pinctrl-imx.c
@@ -509,10 +509,10 @@ static int imx_pinctrl_parse_groups(struct device_node *np,
 	}
 
 	grp->num_pins = size / pin_size;
-	grp->data = devm_kzalloc(info->dev, grp->num_pins *
+	grp->data = devm_kcalloc(info->dev, grp->num_pins,
 				 sizeof(struct imx_pin), GFP_KERNEL);
-	grp->pins = devm_kzalloc(info->dev, grp->num_pins *
-				 sizeof(unsigned int), GFP_KERNEL);
+	grp->pins = devm_kcalloc(info->dev, grp->num_pins,
+				 sizeof(*grp->pins), GFP_KERNEL);
 	if (!grp->pins || !grp->data)
 		return -ENOMEM;
 
@@ -581,9 +581,10 @@ static int imx_pinctrl_parse_functions(struct device_node *np,
 		dev_err(info->dev, "no groups defined in %s\n", np->full_name);
 		return -EINVAL;
 	}
-	func->group_names = devm_kzalloc(info->dev,
-					 func->num_group_names *
-					 sizeof(char *), GFP_KERNEL);
+	func->group_names = devm_kcalloc(info->dev,
+					 func->num_group_names,
+					 sizeof(*func->group_names),
+					 GFP_KERNEL);
 
 	for_each_child_of_node(np, child) {
 		func->group_names[i] = child->name;
-- 
2.12.2