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.

By removing the need for iounmap, this also eliminates a missing iounmap problem, in the the original error handling code following a successful call to ioremap.

Signed-off-by: Julia Lawall Julia.Lawall@lip6.fr

--- sound/soc/mxs/mxs-saif.c | 43 ++++++++++++++----------------------------- 1 file changed, 14 insertions(+), 29 deletions(-)

diff --git a/sound/soc/mxs/mxs-saif.c b/sound/soc/mxs/mxs-saif.c index f204dba..7d755e0 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;

@@ -655,7 +655,7 @@ 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); @@ -666,18 +666,19 @@ static int mxs_saif_probe(struct platform_device *pdev) goto failed_get_resource; }

- if (!request_mem_region(iores->start, resource_size(iores), - "mxs-saif")) { + if (!devm_request_mem_region(&pdev->dev, 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_ioremap(&pdev->dev, iores->start, + resource_size(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 +686,7 @@ 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 +695,15 @@ 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 +711,7 @@ 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 +719,7 @@ 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 +742,19 @@ 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; }