linux-kernel - [PATCH 1/2] gpio: wm831x: Convert to use devm

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Message-ID: <1346558287.7253.0.camel@phoenix>
Date:	Sun, 02 Sep 2012 11:58:07 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	Grant Likely <grant.likely@...retlab.ca>,
	Linus Walleij <linus.walleij@...aro.org>
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] gpio: wm831x: Convert to use devm_kzalloc API

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/gpio/gpio-wm831x.c |   19 +++++--------------
 1 file changed, 5 insertions(+), 14 deletions(-)

diff --git a/drivers/gpio/gpio-wm831x.c b/drivers/gpio/gpio-wm831x.c
index e56a216..b6eda35 100644
--- a/drivers/gpio/gpio-wm831x.c
+++ b/drivers/gpio/gpio-wm831x.c
@@ -250,7 +250,8 @@ static int __devinit wm831x_gpio_probe(struct platform_device *pdev)
 	struct wm831x_gpio *wm831x_gpio;
 	int ret;
 
-	wm831x_gpio = kzalloc(sizeof(*wm831x_gpio), GFP_KERNEL);
+	wm831x_gpio = devm_kzalloc(&pdev->dev, sizeof(*wm831x_gpio),
+				   GFP_KERNEL);
 	if (wm831x_gpio == NULL)
 		return -ENOMEM;
 
@@ -265,30 +266,20 @@ static int __devinit wm831x_gpio_probe(struct platform_device *pdev)
 
 	ret = gpiochip_add(&wm831x_gpio->gpio_chip);
 	if (ret < 0) {
-		dev_err(&pdev->dev, "Could not register gpiochip, %d\n",
-			ret);
-		goto err;
+		dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
+		return ret;
 	}
 
 	platform_set_drvdata(pdev, wm831x_gpio);
 
 	return ret;
-
-err:
-	kfree(wm831x_gpio);
-	return ret;
 }
 
 static int __devexit wm831x_gpio_remove(struct platform_device *pdev)
 {
 	struct wm831x_gpio *wm831x_gpio = platform_get_drvdata(pdev);
-	int ret;
-
-	ret = gpiochip_remove(&wm831x_gpio->gpio_chip);
-	if (ret == 0)
-		kfree(wm831x_gpio);
 
-	return ret;
+	return  gpiochip_remove(&wm831x_gpio->gpio_chip);
 }
 
 static struct platform_driver wm831x_gpio_driver = {
-- 
1.7.9.5



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