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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Amy Shih <amy.shih@advantech.com.tw>,
	Guenter Roeck <linux@roeck-us.net>,
	Sasha Levin <sashal@kernel.org>,
	linux-hwmon@vger.kernel.org
Subject: [PATCH AUTOSEL 5.6 283/606] hwmon: (nct7904) Fix incorrect range of temperature limit registers
Date: Mon,  8 Jun 2020 19:06:48 -0400	[thread overview]
Message-ID: <20200608231211.3363633-283-sashal@kernel.org> (raw)
In-Reply-To: <20200608231211.3363633-1-sashal@kernel.org>

From: Amy Shih <amy.shih@advantech.com.tw>

[ Upstream commit 7b2fd270af27edaf02acb41a7babe805a9441914 ]

The format of temperature limitation registers are 8-bit 2's complement
and the range is -128~127.
Converts the reading value to signed char to fix the incorrect range
of temperature limitation registers.

Signed-off-by: Amy Shih <amy.shih@advantech.com.tw>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/hwmon/nct7904.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/hwmon/nct7904.c b/drivers/hwmon/nct7904.c
index 281c81edabc6..dfb122b5e1b7 100644
--- a/drivers/hwmon/nct7904.c
+++ b/drivers/hwmon/nct7904.c
@@ -356,6 +356,7 @@ static int nct7904_read_temp(struct device *dev, u32 attr, int channel,
 	struct nct7904_data *data = dev_get_drvdata(dev);
 	int ret, temp;
 	unsigned int reg1, reg2, reg3;
+	s8 temps;
 
 	switch (attr) {
 	case hwmon_temp_input:
@@ -461,7 +462,8 @@ static int nct7904_read_temp(struct device *dev, u32 attr, int channel,
 
 	if (ret < 0)
 		return ret;
-	*val = ret * 1000;
+	temps = ret;
+	*val = temps * 1000;
 	return 0;
 }
 
-- 
2.25.1


      reply	other threads:[~2020-06-09  0:20 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-08 23:02 [PATCH AUTOSEL 5.6 001/606] hwmon: (da9052) Synchronize access with mfd Sasha Levin
2020-06-08 23:06 ` Sasha Levin [this message]

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