From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: Sat, 14 Dec 2019 23:02:47 +0100
Subject: rtc: pcf8523: return meaningful value for RTC_VL_READ
Git-commit: 244cf8f0ed2778e1897b64b9043367b7263f5590
Patch-mainline: v5.6-rc1
References: jsc#SLE-12251
REG_CONTROL3_BLF indicates the battery is low and needs to be replaced
soon.
Link: https://lore.kernel.org/r/20191214220259.621996-6-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-pcf8523.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/rtc/rtc-pcf8523.c b/drivers/rtc/rtc-pcf8523.c
index b24c908f5f06..47e0f411dd5c 100644
--- a/drivers/rtc/rtc-pcf8523.c
+++ b/drivers/rtc/rtc-pcf8523.c
@@ -282,11 +282,11 @@ static int pcf8523_rtc_ioctl(struct device *dev, unsigned int cmd,
ret = pcf8523_voltage_low(client);
if (ret < 0)
return ret;
+ if (ret)
+ ret = RTC_VL_BACKUP_LOW;
- if (copy_to_user((void __user *)arg, &ret, sizeof(int)))
- return -EFAULT;
+ return put_user(ret, (unsigned int __user *)arg);
- return 0;
default:
return -ENOIOCTLCMD;
}
--
2.26.2