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drivers/rtc/rtc-m48t35.c: use devm_* APIs

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devm_* functions are device managed and make cleanup code simpler.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Sachin Kamat 2013-04-29 16:20:32 -07:00 committed by Linus Torvalds
parent 6671461278
commit 4f58cd9b46
1 changed files with 10 additions and 32 deletions
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42
drivers/rtc/rtc-m48t35.c
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@ -145,12 +145,11 @@ static int m48t35_probe(struct platform_device *pdev)
{
struct resource *res;
struct m48t35_priv *priv;
int ret = 0;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENODEV;
priv = kzalloc(sizeof(struct m48t35_priv), GFP_KERNEL);
priv = devm_kzalloc(&pdev->dev, sizeof(struct m48t35_priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
@ -160,50 +159,29 @@ static int m48t35_probe(struct platform_device *pdev)
* conflicts are resolved
*/
#ifndef CONFIG_SGI_IP27
if (!request_mem_region(res->start, priv->size, pdev->name)) {
ret = -EBUSY;
goto out;
}
if (!devm_request_mem_region(&pdev->dev, res->start, priv->size,
pdev->name))
return -EBUSY;
#endif
priv->baseaddr = res->start;
priv->reg = ioremap(priv->baseaddr, priv->size);
if (!priv->reg) {
ret = -ENOMEM;
goto out;
}
priv->reg = devm_ioremap(&pdev->dev, priv->baseaddr, priv->size);
if (!priv->reg)
return -ENOMEM;
spin_lock_init(&priv->lock);
platform_set_drvdata(pdev, priv);
priv->rtc = rtc_device_register("m48t35", &pdev->dev,
priv->rtc = devm_rtc_device_register(&pdev->dev, "m48t35",
&m48t35_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);
return 0;
out:
if (priv->reg)
iounmap(priv->reg);
if (priv->baseaddr)
release_mem_region(priv->baseaddr, priv->size);
kfree(priv);
return ret;
}
static int m48t35_remove(struct platform_device *pdev)
{
struct m48t35_priv *priv = platform_get_drvdata(pdev);
rtc_device_unregister(priv->rtc);
iounmap(priv->reg);
#ifndef CONFIG_SGI_IP27
release_mem_region(priv->baseaddr, priv->size);
#endif
kfree(priv);
return 0;
}