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rtc: rtc-spear: use devm_*() routines

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Free the rtc-spear driver from tension of freeing resources :) devm_*
derivatives of multiple routines are used while allocating resources,
which would be freed automatically by kernel.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Deepak Sikri <deepak.sikri@st.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Viresh Kumar 2012-12-17 16:02:29 -08:00 committed by Linus Torvalds
parent 942bfb3ed0
commit bdaa2c63b0
1 changed files with 31 additions and 62 deletions
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93
drivers/rtc/rtc-spear.c
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@ -363,34 +363,41 @@ static int __devinit spear_rtc_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "no resource defined\n");
return -EBUSY;
}
if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
dev_err(&pdev->dev, "rtc region already claimed\n");
return -EBUSY;
}
config = kzalloc(sizeof(*config), GFP_KERNEL);
config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
if (!config) {
dev_err(&pdev->dev, "out of memory\n");
status = -ENOMEM;
goto err_release_region;
return -ENOMEM;
}
config->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(config->clk)) {
status = PTR_ERR(config->clk);
goto err_kfree;
/* alarm irqs */
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "no update irq?\n");
return irq;
}
status = devm_request_irq(&pdev->dev, irq, spear_rtc_irq, 0, pdev->name,
config);
if (status) {
dev_err(&pdev->dev, "Alarm interrupt IRQ%d already claimed\n",
irq);
return status;
}
config->ioaddr = devm_request_and_ioremap(&pdev->dev, res);
if (!config->ioaddr) {
dev_err(&pdev->dev, "request-ioremap fail\n");
return -ENOMEM;
}
config->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(config->clk))
return PTR_ERR(config->clk);
status = clk_enable(config->clk);
if (status < 0)
goto err_clk_put;
config->ioaddr = ioremap(res->start, resource_size(res));
if (!config->ioaddr) {
dev_err(&pdev->dev, "ioremap fail\n");
status = -ENOMEM;
goto err_disable_clock;
}
return status;
spin_lock_init(&config->lock);
platform_set_drvdata(pdev, config);
@ -401,22 +408,7 @@ static int __devinit spear_rtc_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "can't register RTC device, err %ld\n",
PTR_ERR(config->rtc));
status = PTR_ERR(config->rtc);
goto err_iounmap;
}
/* alarm irqs */
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "no update irq?\n");
status = irq;
goto err_clear_platdata;
}
status = request_irq(irq, spear_rtc_irq, 0, pdev->name, config);
if (status) {
dev_err(&pdev->dev, "Alarm interrupt IRQ%d already \
claimed\n", irq);
goto err_clear_platdata;
goto err_disable_clock;
}
if (!device_can_wakeup(&pdev->dev))
@ -424,19 +416,9 @@ static int __devinit spear_rtc_probe(struct platform_device *pdev)
return 0;
err_clear_platdata:
platform_set_drvdata(pdev, NULL);
rtc_device_unregister(config->rtc);
err_iounmap:
iounmap(config->ioaddr);
err_disable_clock:
platform_set_drvdata(pdev, NULL);
clk_disable(config->clk);
err_clk_put:
clk_put(config->clk);
err_kfree:
kfree(config);
err_release_region:
release_mem_region(res->start, resource_size(res));
return status;
}
@ -444,24 +426,11 @@ err_release_region:
static int __devexit spear_rtc_remove(struct platform_device *pdev)
{
struct spear_rtc_config *config = platform_get_drvdata(pdev);
int irq;
struct resource *res;
/* leave rtc running, but disable irqs */
spear_rtc_disable_interrupt(config);
device_init_wakeup(&pdev->dev, 0);
irq = platform_get_irq(pdev, 0);
if (irq)
free_irq(irq, pdev);
clk_disable(config->clk);
clk_put(config->clk);
iounmap(config->ioaddr);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res)
release_mem_region(res->start, resource_size(res));
platform_set_drvdata(pdev, NULL);
rtc_device_unregister(config->rtc);
kfree(config);
spear_rtc_disable_interrupt(config);
clk_disable(config->clk);
device_init_wakeup(&pdev->dev, 0);
return 0;
}