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rtc: rv3028: return meaningful value for RTC_VL_READ
RV3028_STATUS_PORF means the voltage dropped too low and data has been lost. Link: https://lore.kernel.org/r/20191214220259.621996-14-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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1 changed files with 2 additions and 9 deletions
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@ -428,15 +428,8 @@ static int rv3028_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
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if (ret < 0)
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return ret;
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if (status & RV3028_STATUS_PORF)
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dev_warn(&rv3028->rtc->dev, "Voltage low, data loss detected.\n");
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status &= RV3028_STATUS_PORF;
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if (copy_to_user((void __user *)arg, &status, sizeof(int)))
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return -EFAULT;
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return 0;
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status = status & RV3028_STATUS_PORF ? RTC_VL_DATA_INVALID : 0;
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return put_user(status, (unsigned int __user *)arg);
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default:
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return -ENOIOCTLCMD;
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