Hi Kirill, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on staging/staging-testing] [also build test WARNING on v4.17-rc1] [cannot apply to anholt/for-next] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Kirill-Marinushkin/staging-bcm2835-audio-Disconnect-and-free-vchi_instance-on-module_exit/20180417-193147 config: arm-allmodconfig compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross make.cross ARCH=arm allmodconfig make.cross ARCH=arm Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): vim +/err +307 drivers/staging/vc04_services/bcm2835-audio/bcm2835.c 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 274 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 275 static int snd_add_child_device(struct device *device, 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 276 struct bcm2835_audio_driver *audio_driver, 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 277 u32 numchans) 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 278 { 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 279 struct snd_card *card; 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 280 struct device *child; 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 281 struct bcm2835_chip *chip; 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 282 int err, i; 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 283 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 284 child = snd_create_device(device, &audio_driver->driver, 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 285 audio_driver->driver.name); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 286 if (IS_ERR(child)) { 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 287 dev_err(device, 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 288 "Unable to create child device %p, error %ld", 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 289 audio_driver->driver.name, 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 290 PTR_ERR(child)); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 291 return PTR_ERR(child); 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 292 } 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 293 626118b4 drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Kirill Marinushkin 2018-03-23 294 card = snd_bcm2835_card_new(child); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 295 if (IS_ERR(card)) { 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 296 dev_err(child, "Failed to create card"); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 297 return PTR_ERR(card); 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 298 } 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 299 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 300 snd_card_set_dev(card, child); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 301 strcpy(card->driver, audio_driver->driver.name); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 302 strcpy(card->shortname, audio_driver->shortname); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 303 strcpy(card->longname, audio_driver->longname); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 304 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 305 err = snd_bcm2835_create(card, &chip); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 306 if (err) { 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 @307 dev_err(child, "Failed to create chip, error %d\n", err); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 308 return err; 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 309 } 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 310 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 311 chip->dev = child; 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 312 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 313 err = audio_driver->newpcm(chip, audio_driver->shortname, 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 314 audio_driver->route, 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 315 numchans); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 316 if (err) { 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 317 dev_err(child, "Failed to create pcm, error %d\n", err); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 318 return err; 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 319 } 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 320 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 321 err = audio_driver->newctl(chip); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 322 if (err) { 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 323 dev_err(child, "Failed to create controls, error %d\n", err); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 324 return err; 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 325 } 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 326 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 327 for (i = 0; i < numchans; i++) 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 328 chip->avail_substreams |= (1 << i); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 329 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 330 err = snd_card_register(card); 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 331 if (err) { 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 332 dev_err(child, "Failed to register card, error %d\n", err); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 333 return err; 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 334 } 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 335 626118b4 drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Kirill Marinushkin 2018-03-23 336 dev_set_drvdata(child, chip); 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 337 dev_info(child, "card created with %d channels\n", numchans); 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 338 23b028c8 drivers/staging/bcm2835-audio/bcm2835.c Michael Zoran 2017-01-25 339 return 0; 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 340 } 325b5b6c drivers/staging/vc04_services/bcm2835-audio/bcm2835.c Michael Zoran 2017-03-14 341 :::::: The code at line 307 was first introduced by commit :::::: 325b5b6c96a863989078df402d1670d061f52d88 staging: bcm2835-audio: Add support for simultanous HDMI and Headphone audio :::::: TO: Michael Zoran <mzoran@xxxxxxxxxxxx> :::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
