linux-kernel - [PATCH 13/17] rtc: rv3028: return meaningful value for RTC_VL

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Message-Id: <20191214220259.621996-14-alexandre.belloni@bootlin.com>
Date:   Sat, 14 Dec 2019 23:02:55 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     linux-rtc@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Subject: [PATCH 13/17] rtc: rv3028: return meaningful value for RTC_VL_READ

RV3028_STATUS_PORF means the voltage dropped too low and data has been
lost.

Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
---
 drivers/rtc/rtc-rv3028.c | 11 ++---------
 1 file 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;
-- 
2.23.0