Hello Mauro Carvalho Chehab,
The patch d73dcf0cdb95: "media: dvb_frontend: cleanup ioctl handling
logic" from Sep 18, 2017, leads to the following static checker
warning:
drivers/media/dvb-core/dvb_frontend.c:2469 dvb_frontend_handle_ioctl()
error: uninitialized symbol 'err'.
drivers/media/dvb-core/dvb_frontend.c
2427 case FE_READ_UNCORRECTED_BLOCKS:
2428 if (fe->ops.read_ucblocks) {
2429 if (fepriv->thread)
2430 err = fe->ops.read_ucblocks(fe, parg);
2431 else
2432 err = -EAGAIN;
2433 }
"err" isn't initialized if ->ops.read_ucblocks is NULL.
2434 break;
2435
2436 /* DEPRECATED DVBv3 ioctls */
2437
2438 case FE_SET_FRONTEND:
2439 err = dvbv3_set_delivery_system(fe);
2440 if (err)
2441 break;
2442
2443 err = dtv_property_cache_sync(fe, c, parg);
2444 if (err)
2445 break;
2446 err = dtv_set_frontend(fe);
2447 break;
2448 case FE_GET_EVENT:
2449 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2450 break;
2451
2452 case FE_GET_FRONTEND: {
2453 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2454
2455 /*
2456 * Let's use our own copy of property cache, in order to
2457 * avoid mangling with DTV zigzag logic, as drivers might
2458 * return crap, if they don't check if the data is available
2459 * before updating the properties cache.
2460 */
2461 err = dtv_get_frontend(fe, &getp, parg);
2462 break;
2463 }
2464
2465 default:
2466 return -ENOTSUPP;
2467 } /* switch */
2468
2469 return err;
^^^^^^^^^^
2470 }
regards,
dan carpenter
