linux-kernel - [PATCH 3/10] sound/soc/au1x/dma.c: use devm

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Date:	Thu, 29 Dec 2011 17:51:27 +0100
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Liam Girdwood <lrg@...com>
Cc:	kernel-janitors@...r.kernel.org,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 3/10] sound/soc/au1x/dma.c: use devm_ functions

From: Julia Lawall <julia.lawall@...6.fr>

The various devm_ functions allocate memory that is released when a driver
detaches.  This patch uses devm_kzalloc, devm_request_mem_region and
devm_ioremap for data that is allocated in the probe function of a platform
device and is only freed in the remove function.

Signed-off-by: Julia Lawall <julia.lawall@...6.fr>

---
 sound/soc/au1x/dma.c |   12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/sound/soc/au1x/dma.c b/sound/soc/au1x/dma.c
index c4017bd..0a91b18 100644
--- a/sound/soc/au1x/dma.c
+++ b/sound/soc/au1x/dma.c
@@ -325,27 +325,19 @@ static struct snd_soc_platform_driver alchemy_pcm_soc_platform = {
 static int __devinit alchemy_pcm_drvprobe(struct platform_device *pdev)
 {
 	struct alchemy_pcm_ctx *ctx;
-	int ret;
 
-	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
 	if (!ctx)
 		return -ENOMEM;
 
 	platform_set_drvdata(pdev, ctx);
 
-	ret = snd_soc_register_platform(&pdev->dev, &alchemy_pcm_soc_platform);
-	if (ret)
-		kfree(ctx);
-
-	return ret;
+	return snd_soc_register_platform(&pdev->dev, &alchemy_pcm_soc_platform);
 }
 
 static int __devexit alchemy_pcm_drvremove(struct platform_device *pdev)
 {
-	struct alchemy_pcm_ctx *ctx = platform_get_drvdata(pdev);
-
 	snd_soc_unregister_platform(&pdev->dev);
-	kfree(ctx);
 
 	return 0;
 }

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