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rtc: rx8010: return meaningful value for RTC_VL_READ 

RX8010_FLAG_VLF means the voltage dropped too low and data has been lost.

Link: https://lore.kernel.org/r/20191214220259.621996-18-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni 2019-12-14 23:02:59 +01:00
parent 894b043200
commit 8049c11399
1 changed files with 2 additions and 5 deletions
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7
drivers/rtc/rtc-rx8010.c
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@ -399,11 +399,8 @@ static int rx8010_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
if (flagreg < 0)
return flagreg;
tmp = !!(flagreg & RX8010_FLAG_VLF);
if (copy_to_user((void __user *)arg, &tmp, sizeof(int)))
return -EFAULT;
return 0;
tmp = flagreg & RX8010_FLAG_VLF ? RTC_VL_DATA_INVALID : 0;
return put_user(tmp, (unsigned int __user *)arg);
default:
return -ENOIOCTLCMD;