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| author | Jean Delvare <khali@linux-fr.org> | 2010-11-15 21:38:56 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@endymion.delvare> | 2010-11-15 21:38:56 +0100 |
| commit | 61ec2da506ec6544873f0aba026164e4bdd21751 (patch) | |
| tree | 4548b13c7d5457014b820cb2b52bf8e09713ffcb | |
| parent | hwmon: Change mail address of Hans J. Koch (diff) | |
| download | linux-61ec2da506ec6544873f0aba026164e4bdd21751.tar.xz linux-61ec2da506ec6544873f0aba026164e4bdd21751.zip | |
hwmon: (lm95241) Check validity of input values
This clears the following build-time warnings I was seeing:
drivers/hwmon/lm95241.c: In function "set_interval":
drivers/hwmon/lm95241.c:132:15: warning: ignoring return value of "strict_strtol", declared with attribute warn_unused_result
drivers/hwmon/lm95241.c: In function "set_max2":
drivers/hwmon/lm95241.c:278:1: warning: ignoring return value of "strict_strtol", declared with attribute warn_unused_result
drivers/hwmon/lm95241.c: In function "set_max1":
drivers/hwmon/lm95241.c:277:1: warning: ignoring return value of "strict_strtol", declared with attribute warn_unused_result
drivers/hwmon/lm95241.c: In function "set_min2":
drivers/hwmon/lm95241.c:249:1: warning: ignoring return value of "strict_strtol", declared with attribute warn_unused_result
drivers/hwmon/lm95241.c: In function "set_min1":
drivers/hwmon/lm95241.c:248:1: warning: ignoring return value of "strict_strtol", declared with attribute warn_unused_result
drivers/hwmon/lm95241.c: In function "set_type2":
drivers/hwmon/lm95241.c:220:1: warning: ignoring return value of "strict_strtol", declared with attribute warn_unused_result
drivers/hwmon/lm95241.c: In function "set_type1":
drivers/hwmon/lm95241.c:219:1: warning: ignoring return value of "strict_strtol", declared with attribute warn_unused_result
This also fixes a small race in set_interval() as a side effect: by
working with a temporary local variable we prevent data->interval from
being accessed at a time it contains the interval value in the wrong
unit.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Davide Rizzo <elpa.rizzo@gmail.com>
| -rw-r--r-- | drivers/hwmon/lm95241.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/hwmon/lm95241.c b/drivers/hwmon/lm95241.c index 464340f25496..4546d82f024a 100644 --- a/drivers/hwmon/lm95241.c +++ b/drivers/hwmon/lm95241.c @@ -128,9 +128,12 @@ static ssize_t set_interval(struct device *dev, struct device_attribute *attr, { struct i2c_client *client = to_i2c_client(dev); struct lm95241_data *data = i2c_get_clientdata(client); + unsigned long val; - strict_strtol(buf, 10, &data->interval); - data->interval = data->interval * HZ / 1000; + if (strict_strtoul(buf, 10, &val) < 0) + return -EINVAL; + + data->interval = val * HZ / 1000; return count; } @@ -188,7 +191,9 @@ static ssize_t set_type##flag(struct device *dev, \ struct lm95241_data *data = i2c_get_clientdata(client); \ \ long val; \ - strict_strtol(buf, 10, &val); \ +\ + if (strict_strtol(buf, 10, &val) < 0) \ + return -EINVAL; \ \ if ((val == 1) || (val == 2)) { \ \ @@ -227,7 +232,9 @@ static ssize_t set_min##flag(struct device *dev, \ struct lm95241_data *data = i2c_get_clientdata(client); \ \ long val; \ - strict_strtol(buf, 10, &val); \ +\ + if (strict_strtol(buf, 10, &val) < 0) \ + return -EINVAL;\ \ mutex_lock(&data->update_lock); \ \ @@ -256,7 +263,9 @@ static ssize_t set_max##flag(struct device *dev, \ struct lm95241_data *data = i2c_get_clientdata(client); \ \ long val; \ - strict_strtol(buf, 10, &val); \ +\ + if (strict_strtol(buf, 10, &val) < 0) \ + return -EINVAL; \ \ mutex_lock(&data->update_lock); \ \ |