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Subject[PATCH] sound/soc/mxs/mxs-saif.c: use devm_ functions
Date
From: Julia Lawall <Julia.Lawall@lip6.fr>

The various devm_ functions allocate memory that is released when a driver
detaches. This patch uses these functions 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@lip6.fr>

---
patch against
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git from the
branch for-3.4
sound/soc/mxs/mxs-saif.c | 51 ++++++++++-------------------------------------
1 file changed, 11 insertions(+), 40 deletions(-)
diff --git a/sound/soc/mxs/mxs-saif.c b/sound/soc/mxs/mxs-saif.c
index f204dba..12be05b 100644
--- a/sound/soc/mxs/mxs-saif.c
+++ b/sound/soc/mxs/mxs-saif.c
@@ -630,7 +630,7 @@ static int mxs_saif_probe(struct platform_device *pdev)
if (pdev->id >= ARRAY_SIZE(mxs_saif))
return -EINVAL;

- saif = kzalloc(sizeof(*saif), GFP_KERNEL);
+ saif = devm_kzalloc(&pdev->dev, sizeof(*saif), GFP_KERNEL);
if (!saif)
return -ENOMEM;

@@ -655,29 +655,16 @@ static int mxs_saif_probe(struct platform_device *pdev)
ret = PTR_ERR(saif->clk);
dev_err(&pdev->dev, "Cannot get the clock: %d\n",
ret);
- goto failed_clk;
+ return ret;
}

iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!iores) {
- ret = -ENODEV;
- dev_err(&pdev->dev, "failed to get io resource: %d\n",
- ret);
- goto failed_get_resource;
- }

- if (!request_mem_region(iores->start, resource_size(iores),
- "mxs-saif")) {
- dev_err(&pdev->dev, "request_mem_region failed\n");
- ret = -EBUSY;
- goto failed_get_resource;
- }
-
- saif->base = ioremap(iores->start, resource_size(iores));
+ saif->base = devm_request_and_ioremap(&pdev->dev, iores);
if (!saif->base) {
dev_err(&pdev->dev, "ioremap failed\n");
ret = -ENODEV;
- goto failed_ioremap;
+ goto failed_get_resource;
}

dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0);
@@ -685,7 +672,7 @@ static int mxs_saif_probe(struct platform_device *pdev)
ret = -ENODEV;
dev_err(&pdev->dev, "failed to get dma resource: %d\n",
ret);
- goto failed_ioremap;
+ goto failed_get_resource;
}
saif->dma_param.chan_num = dmares->start;

@@ -694,14 +681,15 @@ static int mxs_saif_probe(struct platform_device *pdev)
ret = saif->irq;
dev_err(&pdev->dev, "failed to get irq resource: %d\n",
ret);
- goto failed_get_irq1;
+ goto failed_get_resource;
}

saif->dev = &pdev->dev;
- ret = request_irq(saif->irq, mxs_saif_irq, 0, "mxs-saif", saif);
+ ret = devm_request_irq(&pdev->dev, saif->irq, mxs_saif_irq, 0,
+ "mxs-saif", saif);
if (ret) {
dev_err(&pdev->dev, "failed to request irq\n");
- goto failed_get_irq1;
+ goto failed_get_resource;
}

saif->dma_param.chan_irq = platform_get_irq(pdev, 1);
@@ -709,7 +697,7 @@ static int mxs_saif_probe(struct platform_device *pdev)
ret = saif->dma_param.chan_irq;
dev_err(&pdev->dev, "failed to get dma irq resource: %d\n",
ret);
- goto failed_get_irq2;
+ goto failed_get_resource;
}

platform_set_drvdata(pdev, saif);
@@ -717,7 +705,7 @@ static int mxs_saif_probe(struct platform_device *pdev)
ret = snd_soc_register_dai(&pdev->dev, &mxs_saif_dai);
if (ret) {
dev_err(&pdev->dev, "register DAI failed\n");
- goto failed_register;
+ goto failed_get_resource;
}

saif->soc_platform_pdev = platform_device_alloc(
@@ -740,36 +728,19 @@ failed_pdev_add:
platform_device_put(saif->soc_platform_pdev);
failed_pdev_alloc:
snd_soc_unregister_dai(&pdev->dev);
-failed_register:
-failed_get_irq2:
- free_irq(saif->irq, saif);
-failed_get_irq1:
- iounmap(saif->base);
-failed_ioremap:
- release_mem_region(iores->start, resource_size(iores));
failed_get_resource:
clk_put(saif->clk);
-failed_clk:
- kfree(saif);

return ret;
}

static int __devexit mxs_saif_remove(struct platform_device *pdev)
{
- struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
struct mxs_saif *saif = platform_get_drvdata(pdev);

platform_device_unregister(saif->soc_platform_pdev);
-
snd_soc_unregister_dai(&pdev->dev);
-
- iounmap(saif->base);
- release_mem_region(res->start, resource_size(res));
- free_irq(saif->irq, saif);
-
clk_put(saif->clk);
- kfree(saif);

return 0;
}


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