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Subject[PATCH 11/17] rtc: pcf85063: return meaningful value for RTC_VL_READ
Date
PCF85063_REG_SC_OS means the voltage dropped too low and data has been
lost.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
drivers/rtc/rtc-pcf85063.c | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/rtc/rtc-pcf85063.c b/drivers/rtc/rtc-pcf85063.c
index 2ddd95420a8c..1db17ba1fc64 100644
--- a/drivers/rtc/rtc-pcf85063.c
+++ b/drivers/rtc/rtc-pcf85063.c
@@ -289,15 +289,9 @@ static int pcf85063_ioctl(struct device *dev, unsigned int cmd,
if (ret < 0)
return ret;

- if (status & PCF85063_REG_SC_OS)
- dev_warn(&pcf85063->rtc->dev, "Voltage low, data loss detected.\n");
+ status = status & PCF85063_REG_SC_OS ? RTC_VL_DATA_INVALID : 0;

- status &= PCF85063_REG_SC_OS;
-
- if (copy_to_user((void __user *)arg, &status, sizeof(int)))
- return -EFAULT;
-
- return 0;
+ return put_user(status, (unsigned int __user *)arg);

default:
return -ENOIOCTLCMD;
--
2.23.0
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