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| author | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2019-12-14 23:02:55 +0100 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2019-12-18 10:37:39 +0100 |
| commit | 86e655f9f3e6aa2fd8066133e58a976bd861af6b (patch) | |
| tree | 742c992a3b395c6fca87364c571b596fe8a33d2b /drivers/rtc | |
| parent | rtc: rv3028: remove RTC_VL_CLR handling (diff) | |
| download | linux-86e655f9f3e6aa2fd8066133e58a976bd861af6b.tar.xz linux-86e655f9f3e6aa2fd8066133e58a976bd861af6b.zip | |
rtc: rv3028: return meaningful value for RTC_VL_READ
RV3028_STATUS_PORF means the voltage dropped too low and data has been
lost.
Link: https://lore.kernel.org/r/20191214220259.621996-14-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-rv3028.c | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/drivers/rtc/rtc-rv3028.c b/drivers/rtc/rtc-rv3028.c index d1a2c22861f2..a0ddc86c975a 100644 --- a/drivers/rtc/rtc-rv3028.c +++ b/drivers/rtc/rtc-rv3028.c @@ -428,15 +428,8 @@ static int rv3028_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) if (ret < 0) return ret; - if (status & RV3028_STATUS_PORF) - dev_warn(&rv3028->rtc->dev, "Voltage low, data loss detected.\n"); - - status &= RV3028_STATUS_PORF; - - if (copy_to_user((void __user *)arg, &status, sizeof(int))) - return -EFAULT; - - return 0; + status = status & RV3028_STATUS_PORF ? RTC_VL_DATA_INVALID : 0; + return put_user(status, (unsigned int __user *)arg); default: return -ENOIOCTLCMD; |