linux-kernel - [PATCH] clk: s2mps11: Use kcalloc instead of kzalloc for array allocation

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Message-Id: <1437557693-29433-1-git-send-email-vaibhav.hiremath@linaro.org>
Date:	Wed, 22 Jul 2015 15:04:53 +0530
From:	Vaibhav Hiremath <vaibhav.hiremath@...aro.org>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Vaibhav Hiremath <vaibhav.hiremath@...aro.org>,
	Sangbeom Kim <sbkim73@...sung.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	linux-kernel@...r.kernel.org (open list:SAMSUNG MULTIFUNCTION PMIC
	DEVICE DRIVERS),
	linux-samsung-soc@...r.kernel.org (open list:SAMSUNG MULTIFUNCTION PMIC
	DEVICE DRIVERS),
	linux-clk@...r.kernel.org (open list:COMMON CLK FRAMEWORK)
Subject: [PATCH] clk: s2mps11: Use kcalloc instead of kzalloc for array allocation

This patch cleans up the driver for,

  - Use devm_kcalloc varient instead of devm_kzalloc for array
    allocation.
  - clk_prepare/unprepare, remove "ret" variable as it is not required
  - use __exit for cleanup function

As I am referring this driver as a reference for my 88pm800 clk driver,
applying same changes here as well.

Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@...aro.org>
---
Since I do not have platform to test, it would be helpful if someone
tests it for me.
I have build tested it.

 drivers/clk/clk-s2mps11.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

diff --git a/drivers/clk/clk-s2mps11.c b/drivers/clk/clk-s2mps11.c
index 9b13a30..e17c66a 100644
--- a/drivers/clk/clk-s2mps11.c
+++ b/drivers/clk/clk-s2mps11.c
@@ -58,21 +58,17 @@ static struct s2mps11_clk *to_s2mps11_clk(struct clk_hw *hw)
 static int s2mps11_clk_prepare(struct clk_hw *hw)
 {
 	struct s2mps11_clk *s2mps11 = to_s2mps11_clk(hw);
-	int ret;
 
-	ret = regmap_update_bits(s2mps11->iodev->regmap_pmic,
+	return regmap_update_bits(s2mps11->iodev->regmap_pmic,
 				 s2mps11->reg,
 				 s2mps11->mask, s2mps11->mask);
-
-	return ret;
 }
 
 static void s2mps11_clk_unprepare(struct clk_hw *hw)
 {
 	struct s2mps11_clk *s2mps11 = to_s2mps11_clk(hw);
-	int ret;
 
-	ret = regmap_update_bits(s2mps11->iodev->regmap_pmic, s2mps11->reg,
+	regmap_update_bits(s2mps11->iodev->regmap_pmic, s2mps11->reg,
 			   s2mps11->mask, ~s2mps11->mask);
 }
 
@@ -186,15 +182,15 @@ static int s2mps11_clk_probe(struct platform_device *pdev)
 	struct clk_init_data *clks_init;
 	int i, ret = 0;
 
-	s2mps11_clks = devm_kzalloc(&pdev->dev, sizeof(*s2mps11_clk) *
-					S2MPS11_CLKS_NUM, GFP_KERNEL);
+	s2mps11_clks = devm_kcalloc(&pdev->dev, S2MPS11_CLKS_NUM,
+				sizeof(*s2mps11_clk), GFP_KERNEL);
 	if (!s2mps11_clks)
 		return -ENOMEM;
 
 	s2mps11_clk = s2mps11_clks;
 
-	clk_table = devm_kzalloc(&pdev->dev, sizeof(struct clk *) *
-				 S2MPS11_CLKS_NUM, GFP_KERNEL);
+	clk_table = devm_kcalloc(&pdev->dev, S2MPS11_CLKS_NUM,
+				sizeof(struct clk *), GFP_KERNEL);
 	if (!clk_table)
 		return -ENOMEM;
 
@@ -322,7 +318,7 @@ static int __init s2mps11_clk_init(void)
 }
 subsys_initcall(s2mps11_clk_init);
 
-static void __init s2mps11_clk_cleanup(void)
+static void __exit s2mps11_clk_cleanup(void)
 {
 	platform_driver_unregister(&s2mps11_clk_driver);
 }
-- 
1.9.1

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