diff options
| -rw-r--r-- | drivers/hwmon/lm90.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c index b53f17511b05..567b7c521f38 100644 --- a/drivers/hwmon/lm90.c +++ b/drivers/hwmon/lm90.c @@ -1029,8 +1029,11 @@ static int lm90_set_temp11(struct lm90_data *data, int index, long val) int err; /* +16 degrees offset for temp2 for the LM99 */ - if (data->kind == lm99 && index <= 2) + if (data->kind == lm99 && index <= 2) { + /* prevent integer underflow */ + val = max(val, -128000l); val -= 16000; + } if (data->kind == adt7461 || data->kind == tmp451) data->temp11[index] = temp_to_u16_adt7461(data, val); @@ -1089,8 +1092,11 @@ static int lm90_set_temp8(struct lm90_data *data, int index, long val) int err; /* +16 degrees offset for temp2 for the LM99 */ - if (data->kind == lm99 && index == 3) + if (data->kind == lm99 && index == 3) { + /* prevent integer underflow */ + val = max(val, -128000l); val -= 16000; + } if (data->kind == adt7461 || data->kind == tmp451) data->temp8[index] = temp_to_u8_adt7461(data, val); @@ -1137,6 +1143,9 @@ static int lm90_set_temphyst(struct lm90_data *data, long val) else temp = temp_from_s8(data->temp8[LOCAL_CRIT]); + /* prevent integer underflow */ + val = max(val, -128000l); + data->temp_hyst = hyst_to_reg(temp - val); err = i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST, data->temp_hyst); |