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Message-Id: <20140726190215.154201670@linuxfoundation.org>
Date: Sat, 26 Jul 2014 12:01:53 -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, Guenter Roeck <linux@...ck-us.net>,
Axel Lin <axel.lin@...ics.com>
Subject: [PATCH 3.14 19/87] hwmon: (adt7470) Fix writes to temperature limit registers
3.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Guenter Roeck <linux@...ck-us.net>
commit de12d6f4b10b21854441f5242dcb29ea96181e58 upstream.
Temperature limit registers are signed. Limits therefore need
to be clamped to (-128, 127) degrees C and not to (0, 255)
degrees C.
Without this fix, writing a limit of 128 degrees C sets the
actual limit to -128 degrees C.
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Reviewed-by: Axel Lin <axel.lin@...ics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/hwmon/adt7470.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/hwmon/adt7470.c
+++ b/drivers/hwmon/adt7470.c
@@ -515,7 +515,7 @@ static ssize_t set_temp_min(struct devic
return -EINVAL;
temp = DIV_ROUND_CLOSEST(temp, 1000);
- temp = clamp_val(temp, 0, 255);
+ temp = clamp_val(temp, -128, 127);
mutex_lock(&data->lock);
data->temp_min[attr->index] = temp;
@@ -549,7 +549,7 @@ static ssize_t set_temp_max(struct devic
return -EINVAL;
temp = DIV_ROUND_CLOSEST(temp, 1000);
- temp = clamp_val(temp, 0, 255);
+ temp = clamp_val(temp, -128, 127);
mutex_lock(&data->lock);
data->temp_max[attr->index] = temp;
@@ -826,7 +826,7 @@ static ssize_t set_pwm_tmin(struct devic
return -EINVAL;
temp = DIV_ROUND_CLOSEST(temp, 1000);
- temp = clamp_val(temp, 0, 255);
+ temp = clamp_val(temp, -128, 127);
mutex_lock(&data->lock);
data->pwm_tmin[attr->index] = temp;
--
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