linux-kernel - [PATCH 4.18 211/228] hwmon: (ina2xx) fix sysfs shunt resistor read access

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Date:   Tue,  2 Oct 2018 06:25:08 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Lothar Felten <lothar.felten@...il.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.18 211/228] hwmon: (ina2xx) fix sysfs shunt resistor read access

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

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

From: Lothar Felten <lothar.felten@...il.com>

[ Upstream commit 3ad867001c91657c46dcf6656d52eb6080286fd5 ]

fix the sysfs shunt resistor read access: return the shunt resistor
value, not the calibration register contents.

update email address

Signed-off-by: Lothar Felten <lothar.felten@...il.com>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 Documentation/hwmon/ina2xx           |    2 +-
 drivers/hwmon/ina2xx.c               |   13 +++++++++++--
 include/linux/platform_data/ina2xx.h |    2 +-
 3 files changed, 13 insertions(+), 4 deletions(-)

--- a/Documentation/hwmon/ina2xx
+++ b/Documentation/hwmon/ina2xx
@@ -32,7 +32,7 @@ Supported chips:
     Datasheet: Publicly available at the Texas Instruments website
                http://www.ti.com/
 
-Author: Lothar Felten <l-felten@...com>
+Author: Lothar Felten <lothar.felten@...il.com>
 
 Description
 -----------
--- a/drivers/hwmon/ina2xx.c
+++ b/drivers/hwmon/ina2xx.c
@@ -17,7 +17,7 @@
  * Bi-directional Current/Power Monitor with I2C Interface
  * Datasheet: http://www.ti.com/product/ina230
  *
- * Copyright (C) 2012 Lothar Felten <l-felten@...com>
+ * Copyright (C) 2012 Lothar Felten <lothar.felten@...il.com>
  * Thanks to Jan Volkering
  *
  * This program is free software; you can redistribute it and/or modify
@@ -329,6 +329,15 @@ static int ina2xx_set_shunt(struct ina2x
 	return 0;
 }
 
+static ssize_t ina2xx_show_shunt(struct device *dev,
+			      struct device_attribute *da,
+			      char *buf)
+{
+	struct ina2xx_data *data = dev_get_drvdata(dev);
+
+	return snprintf(buf, PAGE_SIZE, "%li\n", data->rshunt);
+}
+
 static ssize_t ina2xx_store_shunt(struct device *dev,
 				  struct device_attribute *da,
 				  const char *buf, size_t count)
@@ -403,7 +412,7 @@ static SENSOR_DEVICE_ATTR(power1_input,
 
 /* shunt resistance */
 static SENSOR_DEVICE_ATTR(shunt_resistor, S_IRUGO | S_IWUSR,
-			  ina2xx_show_value, ina2xx_store_shunt,
+			  ina2xx_show_shunt, ina2xx_store_shunt,
 			  INA2XX_CALIBRATION);
 
 /* update interval (ina226 only) */
--- a/include/linux/platform_data/ina2xx.h
+++ b/include/linux/platform_data/ina2xx.h
@@ -1,7 +1,7 @@
 /*
  * Driver for Texas Instruments INA219, INA226 power monitor chips
  *
- * Copyright (C) 2012 Lothar Felten <l-felten@...com>
+ * Copyright (C) 2012 Lothar Felten <lothar.felten@...il.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as