From c6370dbe45278db0ebebc377c0a6143b7c488379 Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Sat, 14 Jan 2012 20:58:08 -0800 Subject: [PATCH] hwmon: (lm87) Fix checkpatch issues 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' (ctx:VxV) ERROR: trailing statements should be on next line WARNING: line over 80 characters WARNING: simple_strtol is obsolete, use kstrtol instead WARNING: simple_strtoul is obsolete, use kstrtoul instead Modify multi-line comments to follow Documentation/CodingStyle.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 Signed-off-by: Guenter Roeck Acked-by: Jean Delvare --- drivers/hwmon/lm87.c | 257 +++++++++++++++++++++++++++++-------------- 1 file changed, 174 insertions(+), 83 deletions(-) diff --git a/drivers/hwmon/lm87.c b/drivers/hwmon/lm87.c index 126d0cc42090..0216592a794b 100644 --- a/drivers/hwmon/lm87.c +++ b/drivers/hwmon/lm87.c @@ -119,20 +119,21 @@ static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C }; * The LM87 uses signed 8-bit values for temperatures. */ -#define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) -#define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ +#define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192) +#define IN_TO_REG(val, scale) ((val) <= 0 ? 0 : \ (val) * 192 >= (scale) * 255 ? 255 : \ - ((val) * 192 + (scale)/2) / (scale)) + ((val) * 192 + (scale) / 2) / (scale)) #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))) -#define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \ - (1350000 + (val)*(div) / 2) / ((val)*(div))) +#define FAN_FROM_REG(reg, div) ((reg) == 255 || (reg) == 0 ? 0 : \ + (1350000 + (reg)*(div) / 2) / ((reg) * (div))) +#define FAN_TO_REG(val, div) ((val) * (div) * 255 <= 1350000 ? 255 : \ + (1350000 + (val)*(div) / 2) / ((val) * (div))) #define FAN_DIV_FROM_REG(reg) (1 << (reg)) @@ -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]); + 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]); + 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, \ - const char *buf, size_t count) \ +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, \ - const char *buf, size_t count) \ +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); \ @@ -314,63 +333,85 @@ 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])); \ + 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); 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, \ - const char *buf, size_t count) \ +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, \ - const char *buf, size_t count) \ +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]))); \ + 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]))); \ + 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; @@ -479,16 +551,17 @@ 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); \ + return set_fan_div(dev, buf, count, offset - 1); \ } \ static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ show_fan##offset##_min, set_fan##offset##_min); \ @@ -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)) { -- 2.20.1