linux-kernel - [PATCH 03/17] rtc: abx80x: return meaningful value for RTC_VL

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Message-Id: <20191214220259.621996-4-alexandre.belloni@bootlin.com>
Date:   Sat, 14 Dec 2019 23:02:45 +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 03/17] rtc: abx80x: return meaningful value for RTC_VL_READ

ABX8XX_STATUS_BLF indicates the battery is low and needs to be replaced
soon.

Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
---
 drivers/rtc/rtc-abx80x.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/rtc/rtc-abx80x.c b/drivers/rtc/rtc-abx80x.c
index 73830670a41f..3521d8e8dc38 100644
--- a/drivers/rtc/rtc-abx80x.c
+++ b/drivers/rtc/rtc-abx80x.c
@@ -523,12 +523,9 @@ static int abx80x_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
 		if (status < 0)
 			return status;
 
-		tmp = !!(status & ABX8XX_STATUS_BLF);
+		tmp = status & ABX8XX_STATUS_BLF ? RTC_VL_BACKUP_LOW : 0;
 
-		if (copy_to_user((void __user *)arg, &tmp, sizeof(int)))
-			return -EFAULT;
-
-		return 0;
+		return put_user(tmp, (unsigned int __user *)arg);
 
 	case RTC_VL_CLR:
 		status = i2c_smbus_read_byte_data(client, ABX8XX_REG_STATUS);
-- 
2.23.0