linux-kernel - [PATCH 4.9 021/104] hwmon: (max31790) Set correct PWM value

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Message-Id: <20171222084611.261279984@linuxfoundation.org>
Date:   Fri, 22 Dec 2017 09:45:47 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Alex Hemme <ahemme@...co.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.9 021/104] hwmon: (max31790) Set correct PWM value

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Hemme <ahemme@...co.com>


[ Upstream commit dd7406dd334a98ada3ff5371847a3eeb4ba16313 ]

Traced fans not spinning to incorrect PWM value being written.
The passed in value was written instead of the calulated value.

Fixes: 54187ff9d766 ("hwmon: (max31790) Convert to use new hwmon registration API")
Signed-off-by: Alex Hemme <ahemme@...co.com>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/hwmon/max31790.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/hwmon/max31790.c
+++ b/drivers/hwmon/max31790.c
@@ -311,7 +311,7 @@ static int max31790_write_pwm(struct dev
 		data->pwm[channel] = val << 8;
 		err = i2c_smbus_write_word_swapped(client,
 						   MAX31790_REG_PWMOUT(channel),
-						   val);
+						   data->pwm[channel]);
 		break;
 	case hwmon_pwm_enable:
 		fan_config = data->fan_config[channel];