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Message-Id: <1407530482-4483-84-git-send-email-kamal@canonical.com>
Date: Fri, 8 Aug 2014 13:38:26 -0700
From: Kamal Mostafa <kamal@...onical.com>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org,
kernel-team@...ts.ubuntu.com
Cc: Guenter Roeck <linux@...ck-us.net>,
Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13 083/259] hwmon: (emc2103) Clamp limits instead of bailing out
3.13.11.6 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Guenter Roeck <linux@...ck-us.net>
commit f6c2dd20108c35e30e2c1f3c6142d189451a626b upstream.
It is customary to clamp limits instead of bailing out with an error
if a configured limit is out of the range supported by the driver.
This simplifies limit configuration, since the user will not typically
know chip and/or driver specific limits.
Reviewed-by: Jean Delvare <jdelvare@...e.de>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
drivers/hwmon/emc2103.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)
diff --git a/drivers/hwmon/emc2103.c b/drivers/hwmon/emc2103.c
index 2c137b2..5790246 100644
--- a/drivers/hwmon/emc2103.c
+++ b/drivers/hwmon/emc2103.c
@@ -250,9 +250,7 @@ static ssize_t set_temp_min(struct device *dev, struct device_attribute *da,
if (result < 0)
return result;
- val = DIV_ROUND_CLOSEST(val, 1000);
- if ((val < -63) || (val > 127))
- return -EINVAL;
+ val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), -63, 127);
mutex_lock(&data->update_lock);
data->temp_min[nr] = val;
@@ -274,9 +272,7 @@ static ssize_t set_temp_max(struct device *dev, struct device_attribute *da,
if (result < 0)
return result;
- val = DIV_ROUND_CLOSEST(val, 1000);
- if ((val < -63) || (val > 127))
- return -EINVAL;
+ val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), -63, 127);
mutex_lock(&data->update_lock);
data->temp_max[nr] = val;
@@ -390,15 +386,14 @@ static ssize_t set_fan_target(struct device *dev, struct device_attribute *da,
{
struct emc2103_data *data = emc2103_update_device(dev);
struct i2c_client *client = to_i2c_client(dev);
- long rpm_target;
+ unsigned long rpm_target;
- int result = kstrtol(buf, 10, &rpm_target);
+ int result = kstrtoul(buf, 10, &rpm_target);
if (result < 0)
return result;
/* Datasheet states 16384 as maximum RPM target (table 3.2) */
- if ((rpm_target < 0) || (rpm_target > 16384))
- return -EINVAL;
+ rpm_target = clamp_val(rpm_target, 0, 16384);
mutex_lock(&data->update_lock);
--
1.9.1
--
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