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Commit 15c1567a authored by Jingoo Han's avatar Jingoo Han Committed by Linus Torvalds
Browse files

rtc: rtc-ds1216: use devm_*() functions 



Use devm_*() functions to make cleanup paths simpler.

Signed-off-by: default avatarJingoo Han <jg1.han@samsung.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 26c5f7d9

drivers/rtc/rtc-ds1216.c

+9 −35
Original line number Diff line number Diff line
@@ -30,8 +30,6 @@ struct ds1216_regs { 
struct ds1216_priv {

	struct rtc_device *rtc;

	void __iomem *ioaddr;

	size_t size;

	unsigned long baseaddr;

};



static const u8 magic[] = {
@@ -144,57 +142,33 @@ static int __init ds1216_rtc_probe(struct platform_device *pdev) 
{

	struct resource *res;

	struct ds1216_priv *priv;

	int ret = 0;

	u8 dummy[8];



	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!res)

		return -ENODEV;

	priv = kzalloc(sizeof *priv, GFP_KERNEL);

	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);

	if (!priv)

		return -ENOMEM;



	platform_set_drvdata(pdev, priv);



	priv->size = resource_size(res);

	if (!request_mem_region(res->start, priv->size, pdev->name)) {

		ret = -EBUSY;

		goto out;

	}

	priv->baseaddr = res->start;

	priv->ioaddr = ioremap(priv->baseaddr, priv->size);

	if (!priv->ioaddr) {

		ret = -ENOMEM;

		goto out;

	}

	priv->rtc = rtc_device_register("ds1216", &pdev->dev,

	priv->ioaddr = devm_ioremap_resource(&pdev->dev, res);

	if (IS_ERR(priv->ioaddr))

		return PTR_ERR(priv->ioaddr);



	priv->rtc = devm_rtc_device_register(&pdev->dev, "ds1216",

					&ds1216_rtc_ops, THIS_MODULE);

	if (IS_ERR(priv->rtc)) {

		ret = PTR_ERR(priv->rtc);

		goto out;

	}

	if (IS_ERR(priv->rtc))

		return PTR_ERR(priv->rtc);



	/* dummy read to get clock into a known state */

	ds1216_read(priv->ioaddr, dummy);

	return 0;



out:

	if (priv->ioaddr)

		iounmap(priv->ioaddr);

	if (priv->baseaddr)

		release_mem_region(priv->baseaddr, priv->size);

	kfree(priv);

	return ret;

}



static int __exit ds1216_rtc_remove(struct platform_device *pdev)

{

	struct ds1216_priv *priv = platform_get_drvdata(pdev);



	rtc_device_unregister(priv->rtc);

	iounmap(priv->ioaddr);

	release_mem_region(priv->baseaddr, priv->size);

	kfree(priv);

	return 0;

}