linux-kernel - [PATCH 1/10] sound/soc/au1x/ac97c.c: use devm

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Message-Id: <1325177489-13815-11-git-send-email-Julia.Lawall@lip6.fr>
Date:	Thu, 29 Dec 2011 17:51:29 +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 1/10] sound/soc/au1x/ac97c.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/ac97c.c |   40 +++++++++++++---------------------------
 1 file changed, 13 insertions(+), 27 deletions(-)

diff --git a/sound/soc/au1x/ac97c.c b/sound/soc/au1x/ac97c.c
index 7771934..c5ac244 100644
--- a/sound/soc/au1x/ac97c.c
+++ b/sound/soc/au1x/ac97c.c
@@ -229,35 +229,34 @@ static int __devinit au1xac97c_drvprobe(struct platform_device *pdev)
 	struct resource *iores, *dmares;
 	struct au1xpsc_audio_data *ctx;
 
-	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
 	if (!ctx)
 		return -ENOMEM;
 
 	mutex_init(&ctx->lock);
 
 	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!iores) {
-		ret = -ENODEV;
-		goto out0;
-	}
+	if (!iores)
+		return -ENODEV;
 
-	ret = -EBUSY;
-	if (!request_mem_region(iores->start, resource_size(iores),
-				pdev->name))
-		goto out0;
+	if (!devm_request_mem_region(&pdev->dev, iores->start,
+				     resource_size(iores),
+				     pdev->name))
+		return -EBUSY;
 
-	ctx->mmio = ioremap_nocache(iores->start, resource_size(iores));
+	ctx->mmio = devm_ioremap_nocache(&pdev->dev, iores->start,
+					 resource_size(iores));
 	if (!ctx->mmio)
-		goto out1;
+		return -EBUSY;
 
 	dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0);
 	if (!dmares)
-		goto out2;
+		return -EBUSY;
 	ctx->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = dmares->start;
 
 	dmares = platform_get_resource(pdev, IORESOURCE_DMA, 1);
 	if (!dmares)
-		goto out2;
+		return -EBUSY;
 	ctx->dmaids[SNDRV_PCM_STREAM_CAPTURE] = dmares->start;
 
 	/* switch it on */
@@ -271,33 +270,20 @@ static int __devinit au1xac97c_drvprobe(struct platform_device *pdev)
 
 	ret = snd_soc_register_dai(&pdev->dev, &au1xac97c_dai_driver);
 	if (ret)
-		goto out2;
+		return ret;
 
 	ac97c_workdata = ctx;
 	return 0;
-
-out2:
-	iounmap(ctx->mmio);
-out1:
-	release_mem_region(iores->start, resource_size(iores));
-out0:
-	kfree(ctx);
-	return ret;
 }
 
 static int __devexit au1xac97c_drvremove(struct platform_device *pdev)
 {
 	struct au1xpsc_audio_data *ctx = platform_get_drvdata(pdev);
-	struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
 	snd_soc_unregister_dai(&pdev->dev);
 
 	WR(ctx, AC97_ENABLE, EN_D);	/* clock off, disable */
 
-	iounmap(ctx->mmio);
-	release_mem_region(r->start, resource_size(r));
-	kfree(ctx);
-
 	ac97c_workdata = NULL;	/* MDEV */
 
 	return 0;

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