Hello Guenter Roeck,
The patch 1c8467e8e8b2: "hwmon: (lm83) Convert to use with_info API"
from Dec 22, 2021, leads to the following Smatch static checker
warning:
drivers/hwmon/lm83.c:337 lm83_is_visible()
warn: signedness bug returning '(-19)'
drivers/hwmon/lm83.c
300 static umode_t lm83_is_visible(const void *_data, enum hwmon_sensor_types type,
301 u32 attr, int channel)
302 {
303 const struct lm83_data *data = _data;
304
305 /*
306 * LM82 only supports a single external channel, modeled as channel 2.
307 */
308 if (data->type == lm82 && (channel == 1 || channel == 3))
309 return 0;
310
311 switch (type) {
312 case hwmon_chip:
313 if (attr == hwmon_chip_alarms)
314 return 0444;
315 break;
316 case hwmon_temp:
317 switch (attr) {
318 case hwmon_temp_input:
319 case hwmon_temp_max_alarm:
320 case hwmon_temp_crit_alarm:
321 return 0444;
322 case hwmon_temp_fault:
323 if (channel)
324 return 0444;
325 break;
326 case hwmon_temp_max:
327 return 0644;
328 case hwmon_temp_crit:
329 if (channel == 2)
330 return 0644;
331 return 0444;
332 default:
333 break;
334 }
335 break;
336 default:
--> 337 return -ENODEV;
return 0;?
338 }
339 return 0;
340 }
regards,
dan carpenter
