diff options
Diffstat (limited to 'drivers/hwmon/lm73.c')
| -rw-r--r-- | drivers/hwmon/lm73.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/hwmon/lm73.c b/drivers/hwmon/lm73.c index 8fa2632cbbaf..7272176a9ec7 100644 --- a/drivers/hwmon/lm73.c +++ b/drivers/hwmon/lm73.c @@ -49,6 +49,7 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *da, struct i2c_client *client = to_i2c_client(dev); long temp; short value; + s32 err; int status = kstrtol(buf, 10, &temp); if (status < 0) @@ -57,8 +58,8 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *da, /* Write value */ value = (short) SENSORS_LIMIT(temp/250, (LM73_TEMP_MIN*4), (LM73_TEMP_MAX*4)) << 5; - i2c_smbus_write_word_swapped(client, attr->index, value); - return count; + err = i2c_smbus_write_word_swapped(client, attr->index, value); + return (err < 0) ? err : count; } static ssize_t show_temp(struct device *dev, struct device_attribute *da, @@ -66,11 +67,16 @@ static ssize_t show_temp(struct device *dev, struct device_attribute *da, { struct sensor_device_attribute *attr = to_sensor_dev_attr(da); struct i2c_client *client = to_i2c_client(dev); + int temp; + + s32 err = i2c_smbus_read_word_swapped(client, attr->index); + if (err < 0) + return err; + /* use integer division instead of equivalent right shift to guarantee arithmetic shift and preserve the sign */ - int temp = ((s16) (i2c_smbus_read_word_swapped(client, - attr->index))*250) / 32; - return sprintf(buf, "%d\n", temp); + temp = (((s16) err) * 250) / 32; + return scnprintf(buf, PAGE_SIZE, "%d\n", temp); } |