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hwmon: (lm87) Fix checkpatch issues

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Fixed:
ERROR: do not use assignment in if condition
ERROR: space required after that close brace '}'
ERROR: space required after that ',' (ctx:VxV)
ERROR: spaces required around that '<' (ctx:VxV)
ERROR: trailing statements should be on next line
WARNING: line over 80 characters
WARNING: simple_strtol is obsolete, use kstrtol instead
WARNING: simple_strtoul is obsolete, use kstrtoul instead

Modify multi-line comments to follow Documentation/CodingStyle.

Not fixed everywhere (code complexity):
ERROR: do not use assignment in if condition

As a side effect of the changes made, attribute set functions now return an
error if an attempt is made to write non-numeric values. Previously, such
writes were interpreted as writing 0.

Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Guenter Roeck 2012-01-14 20:58:08 -08:00 committed by Guenter Roeck
parent 525ad37319
commit c6370dbe45
1 changed files with 174 additions and 83 deletions
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213
drivers/hwmon/lm87.c
View file

@ -127,7 +127,8 @@ static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
#define TEMP_FROM_REG(reg) ((reg) * 1000)
#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
(val) >= 126500 ? 127 : \
(((val) < 0 ? (val)-500 : (val)+500) / 1000))
(((val) < 0 ? (val) - 500 : \
(val) + 500) / 1000))
#define FAN_FROM_REG(reg, div) ((reg) == 255 || (reg) == 0 ? 0 : \
(1350000 + (reg)*(div) / 2) / ((reg) * (div)))
@ -232,19 +233,23 @@ static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value)
}
#define show_in(offset) \
static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
static ssize_t show_in##offset##_input(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \
data->in_scale[offset])); \
} \
static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
static ssize_t show_in##offset##_min(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \
data->in_scale[offset])); \
} \
static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \
static ssize_t show_in##offset##_max(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \
@ -261,44 +266,58 @@ show_in(5);
show_in(6);
show_in(7);
static void set_in_min(struct device *dev, const char *buf, int nr)
static ssize_t set_in_min(struct device *dev, const char *buf, int nr,
size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm87_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
long val;
int err;
err = kstrtol(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]);
lm87_write_value(client, nr < 6 ? LM87_REG_IN_MIN(nr) :
LM87_REG_AIN_MIN(nr - 6), data->in_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static void set_in_max(struct device *dev, const char *buf, int nr)
static ssize_t set_in_max(struct device *dev, const char *buf, int nr,
size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm87_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
long val;
int err;
err = kstrtol(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]);
lm87_write_value(client, nr < 6 ? LM87_REG_IN_MAX(nr) :
LM87_REG_AIN_MAX(nr - 6), data->in_max[nr]);
mutex_unlock(&data->update_lock);
return count;
}
#define set_in(offset) \
static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \
static ssize_t set_in##offset##_min(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
set_in_min(dev, buf, offset); \
return count; \
return set_in_min(dev, buf, offset, count); \
} \
static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \
static ssize_t set_in##offset##_max(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
set_in_max(dev, buf, offset); \
return count; \
return set_in_max(dev, buf, offset, count); \
} \
static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
show_in##offset##_min, set_in##offset##_min); \
@ -314,20 +333,28 @@ set_in(6);
set_in(7);
#define show_temp(offset) \
static ssize_t show_temp##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
static ssize_t show_temp##offset##_input(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset - 1])); \
} \
static ssize_t show_temp##offset##_low(struct device *dev, struct device_attribute *attr, char *buf) \
static ssize_t show_temp##offset##_low(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \
return sprintf(buf, "%d\n", \
TEMP_FROM_REG(data->temp_low[offset - 1])); \
} \
static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \
static ssize_t show_temp##offset##_high(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \
return sprintf(buf, "%d\n", \
TEMP_FROM_REG(data->temp_high[offset - 1])); \
} \
static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
show_temp##offset##_input, NULL);
@ -335,42 +362,56 @@ show_temp(1);
show_temp(2);
show_temp(3);
static void set_temp_low(struct device *dev, const char *buf, int nr)
static ssize_t set_temp_low(struct device *dev, const char *buf, int nr,
size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm87_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
long val;
int err;
err = kstrtol(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->temp_low[nr] = TEMP_TO_REG(val);
lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static void set_temp_high(struct device *dev, const char *buf, int nr)
static ssize_t set_temp_high(struct device *dev, const char *buf, int nr,
size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm87_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
long val;
int err;
err = kstrtol(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->temp_high[nr] = TEMP_TO_REG(val);
lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]);
mutex_unlock(&data->update_lock);
return count;
}
#define set_temp(offset) \
static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \
static ssize_t set_temp##offset##_low(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
set_temp_low(dev, buf, offset-1); \
return count; \
return set_temp_low(dev, buf, offset - 1, count); \
} \
static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \
static ssize_t set_temp##offset##_high(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
set_temp_high(dev, buf, offset-1); \
return count; \
return set_temp_high(dev, buf, offset - 1, count); \
} \
static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
show_temp##offset##_high, set_temp##offset##_high); \
@ -380,13 +421,15 @@ set_temp(1);
set_temp(2);
set_temp(3);
static ssize_t show_temp_crit_int(struct device *dev, struct device_attribute *attr, char *buf)
static ssize_t show_temp_crit_int(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct lm87_data *data = lm87_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int));
}
static ssize_t show_temp_crit_ext(struct device *dev, struct device_attribute *attr, char *buf)
static ssize_t show_temp_crit_ext(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct lm87_data *data = lm87_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext));
@ -397,63 +440,92 @@ static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL);
static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL);
#define show_fan(offset) \
static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
static ssize_t show_fan##offset##_input(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset - 1], \
FAN_DIV_FROM_REG(data->fan_div[offset - 1]))); \
} \
static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
static ssize_t show_fan##offset##_min(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset - 1], \
FAN_DIV_FROM_REG(data->fan_div[offset - 1]))); \
} \
static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \
static ssize_t show_fan##offset##_div(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct lm87_data *data = lm87_update_device(dev); \
return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \
return sprintf(buf, "%d\n", \
FAN_DIV_FROM_REG(data->fan_div[offset - 1])); \
} \
static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
show_fan##offset##_input, NULL);
show_fan(1);
show_fan(2);
static void set_fan_min(struct device *dev, const char *buf, int nr)
static ssize_t set_fan_min(struct device *dev, const char *buf, int nr,
size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm87_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
long val;
int err;
err = kstrtol(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->fan_min[nr] = FAN_TO_REG(val,
FAN_DIV_FROM_REG(data->fan_div[nr]));
lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
/* Note: we save and restore the fan minimum here, because its value is
determined in part by the fan clock divider. This follows the principle
of least surprise; the user doesn't expect the fan minimum to change just
because the divider changed. */
/*
* Note: we save and restore the fan minimum here, because its value is
* determined in part by the fan clock divider. This follows the principle
* of least surprise; the user doesn't expect the fan minimum to change just
* because the divider changed.
*/
static ssize_t set_fan_div(struct device *dev, const char *buf,
size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm87_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
long val;
int err;
unsigned long min;
u8 reg;
err = kstrtol(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
min = FAN_FROM_REG(data->fan_min[nr],
FAN_DIV_FROM_REG(data->fan_div[nr]));
switch (val) {
case 1: data->fan_div[nr] = 0; break;
case 2: data->fan_div[nr] = 1; break;
case 4: data->fan_div[nr] = 2; break;
case 8: data->fan_div[nr] = 3; break;
case 1:
data->fan_div[nr] = 0;
break;
case 2:
data->fan_div[nr] = 1;
break;
case 4:
data->fan_div[nr] = 2;
break;
case 8:
data->fan_div[nr] = 3;
break;
default:
mutex_unlock(&data->update_lock);
return -EINVAL;
@ -479,14 +551,15 @@ static ssize_t set_fan_div(struct device *dev, const char *buf,
}
#define set_fan(offset) \
static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
size_t count) \
static ssize_t set_fan##offset##_min(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
set_fan_min(dev, buf, offset-1); \
return count; \
return set_fan_min(dev, buf, offset - 1, count); \
} \
static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
size_t count) \
static ssize_t set_fan##offset##_div(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
return set_fan_div(dev, buf, count, offset - 1); \
} \
@ -497,43 +570,60 @@ static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
set_fan(1);
set_fan(2);
static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct lm87_data *data = lm87_update_device(dev);
return sprintf(buf, "%d\n", data->alarms);
}
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct lm87_data *data = lm87_update_device(dev);
return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
}
static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct lm87_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", data->vrm);
}
static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct lm87_data *data = dev_get_drvdata(dev);
data->vrm = simple_strtoul(buf, NULL, 10);
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
data->vrm = val;
return count;
}
static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf)
static ssize_t show_aout(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct lm87_data *data = lm87_update_device(dev);
return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
}
static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
static ssize_t set_aout(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm87_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
long val;
int err;
err = kstrtol(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->aout = AOUT_TO_REG(val);
@ -721,7 +811,8 @@ static int lm87_probe(struct i2c_client *new_client,
data->in_scale[7] = 1875;
/* Register sysfs hooks */
if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group)))
err = sysfs_create_group(&new_client->dev.kobj, &lm87_group);
if (err)
goto exit_free;
if (data->channel & CHAN_NO_FAN(0)) {