From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: Sat, 14 Dec 2019 23:02:59 +0100
Subject: rtc: rx8010: return meaningful value for RTC_VL_READ
Git-commit: 8049c11399a3109099d35fd29e9b55070577ade0
Patch-mainline: v5.6-rc1
References: jsc#SLE-12251
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>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
drivers/rtc/rtc-rx8010.c | 7 ++-----
1 file 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;
--
2.26.2