linux-kernel - [PATCH 1/3] backlight: atmel-pwm-bl: use devm

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Date:	Mon, 21 May 2012 18:18:36 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	'Andrew Morton' <akpm@...ux-foundation.org>,
	'LKML' <linux-kernel@...r.kernel.org>
Cc:	'Richard Purdie' <rpurdie@...ys.net>,
	'Hans-Christian Egtvedt' <egtvedt@...fundet.no>,
	'Jingoo Han' <jg1.han@...sung.com>
Subject: [PATCH 1/3] backlight: atmel-pwm-bl: use devm_ functions

The devm_ functions allocate memory that is released when a driver
detaches. This patch uses devm_kzalloc of these functions.

Cc: Hans-Christian Egtvedt <egtvedt@...fundet.no>
Cc: Richard Purdie <rpurdie@...ys.net>
Signed-off-by: Jingoo Han <jg1.han@...sung.com>
---
 drivers/video/backlight/atmel-pwm-bl.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/video/backlight/atmel-pwm-bl.c b/drivers/video/backlight/atmel-pwm-bl.c
index 0443a4f..cd64073 100644
--- a/drivers/video/backlight/atmel-pwm-bl.c
+++ b/drivers/video/backlight/atmel-pwm-bl.c
@@ -127,7 +127,8 @@ static int atmel_pwm_bl_probe(struct platform_device *pdev)
 	struct atmel_pwm_bl *pwmbl;
 	int retval;
 
-	pwmbl = kzalloc(sizeof(struct atmel_pwm_bl), GFP_KERNEL);
+	pwmbl = devm_kzalloc(&pdev->dev, sizeof(struct atmel_pwm_bl),
+				GFP_KERNEL);
 	if (!pwmbl)
 		return -ENOMEM;
 
@@ -202,7 +203,6 @@ err_free_gpio:
 err_free_pwm:
 	pwm_channel_free(&pwmbl->pwmc);
 err_free_mem:
-	kfree(pwmbl);
 	return retval;
 }
 
@@ -218,7 +218,6 @@ static int __exit atmel_pwm_bl_remove(struct platform_device *pdev)
 	pwm_channel_free(&pwmbl->pwmc);
 	backlight_device_unregister(pwmbl->bldev);
 	platform_set_drvdata(pdev, NULL);
-	kfree(pwmbl);
 
 	return 0;
 }
-- 
1.7.1


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