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Date: Mon, 22 Mar 2010 11:23:08 +0100
From: Jean Delvare <khali@...ux-fr.org>
To: Giel van Schijndel <me@...tis.eu>
Cc: Hans de Goede <hdegoede@...hat.com>,
Jonathan Cameron <jic23@....ac.uk>, lm-sensors@...sensors.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] Hwmon: f71882fg: use strict_stro(l|ul) instead of
simple_strto$1
On Sun, 21 Mar 2010 16:37:14 +0100, Giel van Schijndel wrote:
> Use the strict_strol and strict_stroul functions instead of simple_strol
> and simple_stroul respectively in sysfs functions.
>
> Signed-off-by: Giel van Schijndel <me@...tis.eu>
> ---
> drivers/hwmon/f71882fg.c | 89 ++++++++++++++++++++++++++++++++++++++--------
> 1 files changed, 74 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/hwmon/f71882fg.c b/drivers/hwmon/f71882fg.c
> index 21bc661..5c725a3 100644
> --- a/drivers/hwmon/f71882fg.c
> +++ b/drivers/hwmon/f71882fg.c
> @@ -1128,7 +1128,10 @@ static ssize_t store_fan_full_speed(struct device *dev,
> {
> struct f71882fg_data *data = dev_get_drvdata(dev);
> int nr = to_sensor_dev_attr_2(devattr)->index;
> - long val = simple_strtol(buf, NULL, 10);
> + long val;
> +
> + if (strict_strtol(buf, 10, &val) == -EINVAL)
> + return -EINVAL;
That's not correct. You want to return an error if strict_strtol()
returns _any_ error, not just -EINVAL. Maybe the current implementation
can't return any other error code, but you should not assume this will
always be the case in the future.
>
> val = SENSORS_LIMIT(val, 23, 1500000);
> val = fan_to_reg(val);
> @@ -1158,7 +1161,10 @@ static ssize_t store_fan_beep(struct device *dev, struct device_attribute
> {
> struct f71882fg_data *data = dev_get_drvdata(dev);
> int nr = to_sensor_dev_attr_2(devattr)->index;
> - unsigned long val = simple_strtoul(buf, NULL, 10);
> + unsigned long val;
> +
> + if (strict_strtoul(buf, 10, &val) == -EINVAL)
> + return -EINVAL;
>
> mutex_lock(&data->update_lock);
> data->fan_beep = f71882fg_read8(data, F71882FG_REG_FAN_BEEP);
> @@ -1206,7 +1212,12 @@ static ssize_t store_in_max(struct device *dev, struct device_attribute
> *devattr, const char *buf, size_t count)
> {
> struct f71882fg_data *data = dev_get_drvdata(dev);
> - long val = simple_strtol(buf, NULL, 10) / 8;
> + long val;
> +
> + if (strict_strtol(buf, 10, &val) == -EINVAL)
> + return -EINVAL;
> +
> + val /= 8;
> val = SENSORS_LIMIT(val, 0, 255);
>
> mutex_lock(&data->update_lock);
> @@ -1234,7 +1245,10 @@ static ssize_t store_in_beep(struct device *dev, struct device_attribute
> {
> struct f71882fg_data *data = dev_get_drvdata(dev);
> int nr = to_sensor_dev_attr_2(devattr)->index;
> - unsigned long val = simple_strtoul(buf, NULL, 10);
> + unsigned long val;
> +
> + if (strict_strtoul(buf, 10, &val) == -EINVAL)
> + return -EINVAL;
>
> mutex_lock(&data->update_lock);
> data->in_beep = f71882fg_read8(data, F71882FG_REG_IN_BEEP);
> @@ -1300,7 +1314,12 @@ static ssize_t store_temp_max(struct device *dev, struct device_attribute
> {
> struct f71882fg_data *data = dev_get_drvdata(dev);
> int nr = to_sensor_dev_attr_2(devattr)->index;
> - long val = simple_strtol(buf, NULL, 10) / 1000;
> + long val;
> +
> + if (strict_strtol(buf, 10, &val) == -EINVAL)
> + return -EINVAL;
> +
> + val /= 1000;
> val = SENSORS_LIMIT(val, 0, 255);
>
> mutex_lock(&data->update_lock);
> @@ -1334,9 +1353,14 @@ static ssize_t store_temp_max_hyst(struct device *dev, struct device_attribute
> {
> struct f71882fg_data *data = dev_get_drvdata(dev);
> int nr = to_sensor_dev_attr_2(devattr)->index;
> - long val = simple_strtol(buf, NULL, 10) / 1000;
> ssize_t ret = count;
> u8 reg;
> + long val;
> +
> + if (strict_strtol(buf, 10, &val) == -EINVAL)
> + return -EINVAL;
> +
> + val /= 1000;
>
> mutex_lock(&data->update_lock);
>
> @@ -1373,7 +1397,12 @@ static ssize_t store_temp_crit(struct device *dev, struct device_attribute
> {
> struct f71882fg_data *data = dev_get_drvdata(dev);
> int nr = to_sensor_dev_attr_2(devattr)->index;
> - long val = simple_strtol(buf, NULL, 10) / 1000;
> + long val;
> +
> + if (strict_strtol(buf, 10, &val) == -EINVAL)
> + return -EINVAL;
> +
> + val /= 1000;
> val = SENSORS_LIMIT(val, 0, 255);
>
> mutex_lock(&data->update_lock);
> @@ -1428,7 +1457,10 @@ static ssize_t store_temp_beep(struct device *dev, struct device_attribute
> {
> struct f71882fg_data *data = dev_get_drvdata(dev);
> int nr = to_sensor_dev_attr_2(devattr)->index;
> - unsigned long val = simple_strtoul(buf, NULL, 10);
> + unsigned long val;
> +
> + if (strict_strtoul(buf, 10, &val) == -EINVAL)
> + return -EINVAL;
>
> mutex_lock(&data->update_lock);
> data->temp_beep = f71882fg_read8(data, F71882FG_REG_TEMP_BEEP);
> @@ -1491,7 +1523,11 @@ static ssize_t store_pwm(struct device *dev,
> {
> struct f71882fg_data *data = dev_get_drvdata(dev);
> int nr = to_sensor_dev_attr_2(devattr)->index;
> - long val = simple_strtol(buf, NULL, 10);
> + long val;
> +
> + if (strict_strtol(buf, 10, &val) == -EINVAL)
> + return -EINVAL;
> +
> val = SENSORS_LIMIT(val, 0, 255);
>
> mutex_lock(&data->update_lock);
> @@ -1552,7 +1588,10 @@ static ssize_t store_pwm_enable(struct device *dev, struct device_attribute
> {
> struct f71882fg_data *data = dev_get_drvdata(dev);
> int nr = to_sensor_dev_attr_2(devattr)->index;
> - long val = simple_strtol(buf, NULL, 10);
> + long val;
> +
> + if (strict_strtol(buf, 10, &val) == -EINVAL)
> + return -EINVAL;
>
> /* Special case for F8000 pwm channel 3 which only does auto mode */
> if (data->type == f8000 && nr == 2 && val != 2)
> @@ -1628,7 +1667,11 @@ static ssize_t store_pwm_auto_point_pwm(struct device *dev,
> struct f71882fg_data *data = dev_get_drvdata(dev);
> int pwm = to_sensor_dev_attr_2(devattr)->index;
> int point = to_sensor_dev_attr_2(devattr)->nr;
> - long val = simple_strtol(buf, NULL, 10);
> + long val;
> +
> + if (strict_strtol(buf, 10, &val) == -EINVAL)
> + return -EINVAL;
> +
> val = SENSORS_LIMIT(val, 0, 255);
>
> mutex_lock(&data->update_lock);
> @@ -1676,8 +1719,13 @@ static ssize_t store_pwm_auto_point_temp_hyst(struct device *dev,
> struct f71882fg_data *data = dev_get_drvdata(dev);
> int nr = to_sensor_dev_attr_2(devattr)->index;
> int point = to_sensor_dev_attr_2(devattr)->nr;
> - long val = simple_strtol(buf, NULL, 10) / 1000;
> u8 reg;
> + long val;
> +
> + if (strict_strtol(buf, 10, &val) == -EINVAL)
> + return -EINVAL;
> +
> + val /= 1000;
>
> mutex_lock(&data->update_lock);
> data->pwm_auto_point_temp[nr][point] =
> @@ -1717,7 +1765,10 @@ static ssize_t store_pwm_interpolate(struct device *dev,
> {
> struct f71882fg_data *data = dev_get_drvdata(dev);
> int nr = to_sensor_dev_attr_2(devattr)->index;
> - unsigned long val = simple_strtoul(buf, NULL, 10);
> + unsigned long val;
> +
> + if (strict_strtoul(buf, 10, &val) == -EINVAL)
> + return -EINVAL;
>
> mutex_lock(&data->update_lock);
> data->pwm_auto_point_mapping[nr] =
> @@ -1753,7 +1804,10 @@ static ssize_t store_pwm_auto_point_channel(struct device *dev,
> {
> struct f71882fg_data *data = dev_get_drvdata(dev);
> int nr = to_sensor_dev_attr_2(devattr)->index;
> - long val = simple_strtol(buf, NULL, 10);
> + long val;
> +
> + if (strict_strtol(buf, 10, &val) == -EINVAL)
> + return -EINVAL;
>
> switch (val) {
> case 1:
> @@ -1800,7 +1854,12 @@ static ssize_t store_pwm_auto_point_temp(struct device *dev,
> struct f71882fg_data *data = dev_get_drvdata(dev);
> int pwm = to_sensor_dev_attr_2(devattr)->index;
> int point = to_sensor_dev_attr_2(devattr)->nr;
> - long val = simple_strtol(buf, NULL, 10) / 1000;
> + long val;
> +
> + if (strict_strtol(buf, 10, &val) == -EINVAL)
> + return -EINVAL;
> +
> + val /= 1000;
>
> if (data->type == f71889fg)
> val = SENSORS_LIMIT(val, -128, 127);
--
Jean Delvare
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