[PATCH 8/8] rtc: rtc-sh: use devm_*() functions

Jingoo Han
2013-05-21T06:18:57Z

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

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
---
drivers/rtc/rtc-sh.c | 72 +++++++++++++++-----------------------------------
1 file changed, 21 insertions(+), 51 deletions(-)

diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c
index cb2f839..6d87e26 100644
--- a/drivers/rtc/rtc-sh.c
+++ b/drivers/rtc/rtc-sh.c
@@ -593,7 +593,7 @@ static int __init sh_rtc_probe(struct platform_device *pdev)
char clk_name[6];
int clk_id, ret;

- rtc = kzalloc(sizeof(struct sh_rtc), GFP_KERNEL);
+ rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
if (unlikely(!rtc))
return -ENOMEM;

@@ -602,9 +602,8 @@ static int __init sh_rtc_probe(struct platform_device *pdev)
/* get periodic/carry/alarm irqs */
ret = platform_get_irq(pdev, 0);
if (unlikely(ret <= 0)) {
- ret = -ENOENT;
dev_err(&pdev->dev, "No IRQ resource\n");
- goto err_badres;
+ return -ENOENT;
}

rtc->periodic_irq = ret;
@@ -613,24 +612,21 @@ static int __init sh_rtc_probe(struct platform_device *pdev)

res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (unlikely(res == NULL)) {
- ret = -ENOENT;
dev_err(&pdev->dev, "No IO resource\n");
- goto err_badres;
+ return -ENOENT;
}

rtc->regsize = resource_size(res);

- rtc->res = request_mem_region(res->start, rtc->regsize, pdev->name);
- if (unlikely(!rtc->res)) {
- ret = -EBUSY;
- goto err_badres;
- }
+ rtc->res = devm_request_mem_region(&pdev->dev, res->start,
+ rtc->regsize, pdev->name);
+ if (unlikely(!rtc->res))
+ return -EBUSY;

- rtc->regbase = ioremap_nocache(rtc->res->start, rtc->regsize);
- if (unlikely(!rtc->regbase)) {
- ret = -EINVAL;
- goto err_badmap;
- }
+ rtc->regbase = devm_ioremap_nocache(&pdev->dev, rtc->res->start,
+ rtc->regsize);
+ if (unlikely(!rtc->regbase))
+ return -EINVAL;

clk_id = pdev->id;
/* With a single device, the clock id is still "rtc0" */
@@ -639,7 +635,7 @@ static int __init sh_rtc_probe(struct platform_device *pdev)

snprintf(clk_name, sizeof(clk_name), "rtc%d", clk_id);

- rtc->clk = clk_get(&pdev->dev, clk_name);
+ rtc->clk = devm_clk_get(&pdev->dev, clk_name);
if (IS_ERR(rtc->clk)) {
/*
* No error handling for rtc->clk intentionally, not all
@@ -665,8 +661,8 @@ static int __init sh_rtc_probe(struct platform_device *pdev)

if (rtc->carry_irq <= 0) {
/* register shared periodic/carry/alarm irq */
- ret = request_irq(rtc->periodic_irq, sh_rtc_shared,
- 0, "sh-rtc", rtc);
+ ret = devm_request_irq(&pdev->dev, rtc->periodic_irq,
+ sh_rtc_shared, 0, "sh-rtc", rtc);
if (unlikely(ret)) {
dev_err(&pdev->dev,
"request IRQ failed with %d, IRQ %d\n", ret,
@@ -675,8 +671,8 @@ static int __init sh_rtc_probe(struct platform_device *pdev)
}
} else {
/* register periodic/carry/alarm irqs */
- ret = request_irq(rtc->periodic_irq, sh_rtc_periodic,
- 0, "sh-rtc period", rtc);
+ ret = devm_request_irq(&pdev->dev, rtc->periodic_irq,
+ sh_rtc_periodic, 0, "sh-rtc period", rtc);
if (unlikely(ret)) {
dev_err(&pdev->dev,
"request period IRQ failed with %d, IRQ %d\n",
@@ -684,24 +680,21 @@ static int __init sh_rtc_probe(struct platform_device *pdev)
goto err_unmap;
}

- ret = request_irq(rtc->carry_irq, sh_rtc_interrupt,
- 0, "sh-rtc carry", rtc);
+ ret = devm_request_irq(&pdev->dev, rtc->carry_irq,
+ sh_rtc_interrupt, 0, "sh-rtc carry", rtc);
if (unlikely(ret)) {
dev_err(&pdev->dev,
"request carry IRQ failed with %d, IRQ %d\n",
ret, rtc->carry_irq);
- free_irq(rtc->periodic_irq, rtc);
goto err_unmap;
}

- ret = request_irq(rtc->alarm_irq, sh_rtc_alarm,
- 0, "sh-rtc alarm", rtc);
+ ret = devm_request_irq(&pdev->dev, rtc->alarm_irq,
+ sh_rtc_alarm, 0, "sh-rtc alarm", rtc);
if (unlikely(ret)) {
dev_err(&pdev->dev,
"request alarm IRQ failed with %d, IRQ %d\n",
ret, rtc->alarm_irq);
- free_irq(rtc->carry_irq, rtc);
- free_irq(rtc->periodic_irq, rtc);
goto err_unmap;
}
}
@@ -714,13 +707,10 @@ static int __init sh_rtc_probe(struct platform_device *pdev)
sh_rtc_setaie(&pdev->dev, 0);
sh_rtc_setcie(&pdev->dev, 0);

- rtc->rtc_dev = rtc_device_register("sh", &pdev->dev,
+ rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, "sh",
&sh_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc->rtc_dev)) {
ret = PTR_ERR(rtc->rtc_dev);
- free_irq(rtc->periodic_irq, rtc);
- free_irq(rtc->carry_irq, rtc);
- free_irq(rtc->alarm_irq, rtc);
goto err_unmap;
}

@@ -737,12 +727,6 @@ static int __init sh_rtc_probe(struct platform_device *pdev)

err_unmap:
clk_disable(rtc->clk);
- clk_put(rtc->clk);
- iounmap(rtc->regbase);
-err_badmap:
- release_mem_region(rtc->res->start, rtc->regsize);
-err_badres:
- kfree(rtc);

return ret;
}
@@ -751,26 +735,12 @@ static int __exit sh_rtc_remove(struct platform_device *pdev)
{
struct sh_rtc *rtc = platform_get_drvdata(pdev);

- rtc_device_unregister(rtc->rtc_dev);
sh_rtc_irq_set_state(&pdev->dev, 0);

sh_rtc_setaie(&pdev->dev, 0);
sh_rtc_setcie(&pdev->dev, 0);

- free_irq(rtc->periodic_irq, rtc);
-
- if (rtc->carry_irq > 0) {
- free_irq(rtc->carry_irq, rtc);
- free_irq(rtc->alarm_irq, rtc);
- }
-
- iounmap(rtc->regbase);
- release_mem_region(rtc->res->start, rtc->regsize);
-
clk_disable(rtc->clk);
- clk_put(rtc->clk);
-
- kfree(rtc);

return 0;
}
--
1.7.10.4