linux-kernel - [PATCH 04/17] rtc: pcf2127: return meaningful value for RTC_VL

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Message-Id: <20191214220259.621996-5-alexandre.belloni@bootlin.com>
Date:   Sat, 14 Dec 2019 23:02:46 +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 04/17] rtc: pcf2127: return meaningful value for RTC_VL_READ

PCF2127_BIT_CTRL3_BLF indicates the battery is low and needs to be replaced
soon.

Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
---
 drivers/rtc/rtc-pcf2127.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c
index 5d8ea9ffd05b..5ac996578523 100644
--- a/drivers/rtc/rtc-pcf2127.c
+++ b/drivers/rtc/rtc-pcf2127.c
@@ -197,11 +197,9 @@ static int pcf2127_rtc_ioctl(struct device *dev,
 		if (ret)
 			return ret;
 
-		touser = touser & PCF2127_BIT_CTRL3_BLF ? 1 : 0;
+		touser = touser & PCF2127_BIT_CTRL3_BLF ? RTC_VL_BACKUP_LOW : 0;
 
-		if (copy_to_user((void __user *)arg, &touser, sizeof(int)))
-			return -EFAULT;
-		return 0;
+		return put_user(touser, (unsigned int __user *)arg);
 	default:
 		return -ENOIOCTLCMD;
 	}
-- 
2.23.0