Hi Pierre-Louis, First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: a27fc14219f2e3c4a46ba9177b04d9b52c875532 commit: 4772c16ede522d46219a59646503d2020841a6f4 ASoC: Intel: Kconfig: Simplify-clarify ACPI/PCI dependencies date: 3 months ago config: i386-randconfig-b0-04181911 (attached as .config) compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4 reproduce: git checkout 4772c16ede522d46219a59646503d2020841a6f4 # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): sound/soc/intel/atom/sst/sst_loader.c: In function 'sst_request_fw': >> sound/soc/intel/atom/sst/sst_loader.c:357:9: warning: 'fw' is used >> uninitialized in this function [-Wuninitialized] if (fw == NULL) { ^ vim +/fw +357 sound/soc/intel/atom/sst/sst_loader.c 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 344 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 345 /* 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 346 * sst_request_fw - requests audio fw from kernel and saves a copy 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 347 * 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 348 * This function requests the SST FW from the kernel, parses it and 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 349 * saves a copy in the driver context 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 350 */ 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 351 static int sst_request_fw(struct intel_sst_drv *sst) 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 352 { 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 353 int retval = 0; 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 354 const struct firmware *fw; 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 355 5794b7ec sound/soc/intel/sst/sst_loader.c Fang, Yang A 2014-10-30 356 retval = request_firmware(&fw, sst->firmware_name, sst->dev); 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 @357 if (fw == NULL) { 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 358 dev_err(sst->dev, "fw is returning as null\n"); 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 359 return -EINVAL; 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 360 } 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 361 if (retval) { 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 362 dev_err(sst->dev, "request fw failed %d\n", retval); 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 363 return retval; 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 364 } 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 365 mutex_lock(&sst->sst_lock); 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 366 retval = sst_cache_and_parse_fw(sst, fw); 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 367 mutex_unlock(&sst->sst_lock); 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 368 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 369 return retval; 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 370 } 9012c954 sound/soc/intel/sst/sst_loader.c Vinod Koul 2014-10-16 371 :::::: The code at line 357 was first introduced by commit :::::: 9012c9544eeac485b2193fea721233907f0847fa ASoC: Intel: mrfld - Add DSP load and management :::::: TO: Vinod Koul <[email protected]> :::::: CC: Mark Brown <[email protected]> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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