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Fix arithmetic overflow in ntc_thermistor driver

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Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fix from Guenter Roeck:
 "Fix arithmetic overflow in ntc_thermistor driver"

* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (ntc_thermistor) Avoid math overflow
This commit is contained in:
Linus Torvalds 2014-02-14 10:33:13 -08:00
commit 8564358667
1 changed files with 3 additions and 3 deletions
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6
drivers/hwmon/ntc_thermistor.c
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@ -145,7 +145,7 @@ struct ntc_data {
static int ntc_adc_iio_read(struct ntc_thermistor_platform_data *pdata)
{
struct iio_channel *channel = pdata->chan;
unsigned int result;
s64 result;
int val, ret;
ret = iio_read_channel_raw(channel, &val);
@ -155,10 +155,10 @@ static int ntc_adc_iio_read(struct ntc_thermistor_platform_data *pdata)
}
/* unit: mV */
result = pdata->pullup_uv * val;
result = pdata->pullup_uv * (s64) val;
result >>= 12;
return result;
return (int)result;
}
static const struct of_device_id ntc_match[] = {