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authorAlexandre Belloni <alexandre.belloni@bootlin.com>2019-12-14 23:02:59 +0100
committerAlexandre Belloni <alexandre.belloni@bootlin.com>2019-12-18 10:37:45 +0100
commit8049c11399a3109099d35fd29e9b55070577ade0 (patch)
tree969e59d8dbdb430925d044098ae78dc6ca6740f0 /drivers/rtc/rtc-rx8010.c
parent894b04320020ee9752c9fffad0fe72ed2ed81e71 (diff)
downloadlinux-8049c11399a3109099d35fd29e9b55070577ade0.tar.bz2
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>
Diffstat (limited to 'drivers/rtc/rtc-rx8010.c')
-rw-r--r--drivers/rtc/rtc-rx8010.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/rtc/rtc-rx8010.c b/drivers/rtc/rtc-rx8010.c
index 9b106a26c64b..4021844bf2fa 100644
--- a/drivers/rtc/rtc-rx8010.c
+++ b/drivers/rtc/rtc-rx8010.c
@@ -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;