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dma: mxs-dma: use devm_* managed functions

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Use devm_* managed functions to simplify probe() error handling.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Shawn Guo 2013-02-25 14:57:26 +08:00
parent f30fb03d4d
commit aaa20517c0
1 changed files with 9 additions and 30 deletions
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39
drivers/dma/mxs-dma.c
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@ -674,7 +674,7 @@ static int __init mxs_dma_probe(struct platform_device *pdev)
struct resource *iores;
int ret, i;
mxs_dma = kzalloc(sizeof(*mxs_dma), GFP_KERNEL);
mxs_dma = devm_kzalloc(&pdev->dev, sizeof(*mxs_dma), GFP_KERNEL);
if (!mxs_dma)
return -ENOMEM;
@ -689,24 +689,13 @@ static int __init mxs_dma_probe(struct platform_device *pdev)
mxs_dma->dev_id = dma_type->id;
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mxs_dma->base = devm_ioremap_resource(&pdev->dev, iores);
if (IS_ERR(mxs_dma->base))
return PTR_ERR(mxs_dma->base);
if (!request_mem_region(iores->start, resource_size(iores),
pdev->name)) {
ret = -EBUSY;
goto err_request_region;
}
mxs_dma->base = ioremap(iores->start, resource_size(iores));
if (!mxs_dma->base) {
ret = -ENOMEM;
goto err_ioremap;
}
mxs_dma->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(mxs_dma->clk)) {
ret = PTR_ERR(mxs_dma->clk);
goto err_clk;
}
mxs_dma->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(mxs_dma->clk))
return PTR_ERR(mxs_dma->clk);
dma_cap_set(DMA_SLAVE, mxs_dma->dma_device.cap_mask);
dma_cap_set(DMA_CYCLIC, mxs_dma->dma_device.cap_mask);
@ -732,7 +721,7 @@ static int __init mxs_dma_probe(struct platform_device *pdev)
ret = mxs_dma_init(mxs_dma);
if (ret)
goto err_init;
return ret;
mxs_dma->dma_device.dev = &pdev->dev;
@ -751,22 +740,12 @@ static int __init mxs_dma_probe(struct platform_device *pdev)
ret = dma_async_device_register(&mxs_dma->dma_device);
if (ret) {
dev_err(mxs_dma->dma_device.dev, "unable to register\n");
goto err_init;
return ret;
}
dev_info(mxs_dma->dma_device.dev, "initialized\n");
return 0;
err_init:
clk_put(mxs_dma->clk);
err_clk:
iounmap(mxs_dma->base);
err_ioremap:
release_mem_region(iores->start, resource_size(iores));
err_request_region:
kfree(mxs_dma);
return ret;
}
static struct platform_driver mxs_dma_driver = {