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hwmon: (pmbus) Use long variables for register to data conversions

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Using integer variable types for register to data conversions can cause
overflows especially for power calculations, which are in microwatt.
Use long variables instead.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org # 2.6.39+
This commit is contained in:
Guenter Roeck 2011-07-10 19:31:29 -07:00
parent 620917de59
commit f450c1504d
1 changed files with 10 additions and 10 deletions
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20
drivers/hwmon/pmbus_core.c
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@ -362,8 +362,8 @@ static struct pmbus_data *pmbus_update_device(struct device *dev)
* Convert linear sensor values to milli- or micro-units
* depending on sensor type.
*/
static int pmbus_reg2data_linear(struct pmbus_data *data,
struct pmbus_sensor *sensor)
static long pmbus_reg2data_linear(struct pmbus_data *data,
struct pmbus_sensor *sensor)
{
s16 exponent;
s32 mantissa;
@ -397,15 +397,15 @@ static int pmbus_reg2data_linear(struct pmbus_data *data,
else
val >>= -exponent;
return (int)val;
return val;
}
/*
* Convert direct sensor values to milli- or micro-units
* depending on sensor type.
*/
static int pmbus_reg2data_direct(struct pmbus_data *data,
struct pmbus_sensor *sensor)
static long pmbus_reg2data_direct(struct pmbus_data *data,
struct pmbus_sensor *sensor)
{
long val = (s16) sensor->data;
long m, b, R;
@ -440,12 +440,12 @@ static int pmbus_reg2data_direct(struct pmbus_data *data,
R++;
}
return (int)((val - b) / m);
return (val - b) / m;
}
static int pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor)
static long pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor)
{
int val;
long val;
if (data->info->direct[sensor->class])
val = pmbus_reg2data_direct(data, sensor);
@ -619,7 +619,7 @@ static int pmbus_get_boolean(struct pmbus_data *data, int index, int *val)
if (!s1 && !s2)
*val = !!regval;
else {
int v1, v2;
long v1, v2;
struct pmbus_sensor *sensor1, *sensor2;
sensor1 = &data->sensors[s1];
@ -661,7 +661,7 @@ static ssize_t pmbus_show_sensor(struct device *dev,
if (sensor->data < 0)
return sensor->data;
return snprintf(buf, PAGE_SIZE, "%d\n", pmbus_reg2data(data, sensor));
return snprintf(buf, PAGE_SIZE, "%ld\n", pmbus_reg2data(data, sensor));
}
static ssize_t pmbus_set_sensor(struct device *dev,