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From: Wan ZongShun on 24 Jun 2010 05:10
This patch does two modifications:

(1) Adjust enable/disable IRQs location,enable it after rtc registration
and disable it prior to unregistration.
(2) Put 'platform_set_drvdata(pdev, nuc900_rtc)' in front of rtc registration still
be safety, though there is no need to do this, when I move enable irq after
rtc registration, I think still put 'platform_set_drvdata' before rtc registration
that would be a good habit.

Signed-off-by: Wan ZongShun <mcuos.com(a)gmail.com>

---
drivers/rtc/rtc-nuc900.c | 23 ++++++++++++-----------
1 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/drivers/rtc/rtc-nuc900.c b/drivers/rtc/rtc-nuc900.c
index 84336d1..0267ea3 100644
--- a/drivers/rtc/rtc-nuc900.c
+++ b/drivers/rtc/rtc-nuc900.c
@@ -269,29 +269,30 @@ static int __devinit nuc900_rtc_probe(struct platform_device *pdev)
goto fail2;
}

- nuc900_rtc->irq_num = platform_get_irq(pdev, 0);
- if (request_irq(nuc900_rtc->irq_num, nuc900_rtc_interrupt,
- IRQF_DISABLED, "nuc900rtc", nuc900_rtc)) {
- dev_err(&pdev->dev, "NUC900 RTC request irq failed\n");
- err = -EBUSY;
- goto fail3;
- }
+ platform_set_drvdata(pdev, nuc900_rtc);

nuc900_rtc->rtcdev = rtc_device_register(pdev->name, &pdev->dev,
&nuc900_rtc_ops, THIS_MODULE);
if (IS_ERR(nuc900_rtc->rtcdev)) {
dev_err(&pdev->dev, "rtc device register faild\n");
err = PTR_ERR(nuc900_rtc->rtcdev);
- goto fail4;
+ goto fail3;
}

- platform_set_drvdata(pdev, nuc900_rtc);
__raw_writel(__raw_readl(nuc900_rtc->rtc_reg + REG_RTC_TSSR) | MODE24,
nuc900_rtc->rtc_reg + REG_RTC_TSSR);

+ nuc900_rtc->irq_num = platform_get_irq(pdev, 0);
+ if (request_irq(nuc900_rtc->irq_num, nuc900_rtc_interrupt,
+ IRQF_DISABLED, "nuc900rtc", nuc900_rtc)) {
+ dev_err(&pdev->dev, "NUC900 RTC request irq failed\n");
+ err = -EBUSY;
+ goto fail4;
+ }
+
return 0;

-fail4: free_irq(nuc900_rtc->irq_num, nuc900_rtc);
+fail4: rtc_device_unregister(nuc900_rtc->rtcdev);
fail3: iounmap(nuc900_rtc->rtc_reg);
fail2: release_mem_region(res->start, resource_size(res));
fail1: kfree(nuc900_rtc);
@@ -303,8 +304,8 @@ static int __devexit nuc900_rtc_remove(struct platform_device *pdev)
struct nuc900_rtc *nuc900_rtc = platform_get_drvdata(pdev);
struct resource *res;

- rtc_device_unregister(nuc900_rtc->rtcdev);
free_irq(nuc900_rtc->irq_num, nuc900_rtc);
+ rtc_device_unregister(nuc900_rtc->rtcdev);
iounmap(nuc900_rtc->rtc_reg);

res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
--
1.6.3.3
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Prev: fs: icache lock lru/writeback lists
Next: Staging: memrar: Fixed memrar_handler.c