tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y head: e864f43593ccf9180c61738abdf1c1dde091367d commit: 2c00f819a72150708b9f9e0a2b031a8fdafa7b15 [7521/9999] iwlwifi: Don't ignore the cap field upon mcc update config: i386-randconfig-s001-20200812 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-168-g9554805c-dirty git checkout 2c00f819a72150708b9f9e0a2b031a8fdafa7b15 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c: note: in included file (through drivers/net/wireless/intel/iwlwifi/mvm/..//fw/img.h, drivers/net/wireless/intel/iwlwifi/mvm/..//iwl-trans.h, ...): drivers/net/wireless/intel/iwlwifi/mvm/..//fw/file.h:286:19: sparse: sparse: mixed bitwiseness drivers/net/wireless/intel/iwlwifi/mvm/..//fw/file.h:405:19: sparse: sparse: mixed bitwiseness drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c: In function '__iwl_mvm_assign_vif_chanctx': drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c:3754:6: warning: this statement may fall through [-Wimplicit-fallthrough=] 3754 | if (switching_chanctx) { | ^ drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c:3758:2: note: here 3758 | case NL80211_IFTYPE_ADHOC: | ^~~~ In file included from drivers/net/wireless/intel/iwlwifi/mvm/../iwl-trans.h:76, from drivers/net/wireless/intel/iwlwifi/mvm/../iwl-devtrace.h:32, from drivers/net/wireless/intel/iwlwifi/mvm/../iwl-io.h:32, from drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c:82: At top level: drivers/net/wireless/intel/iwlwifi/mvm/../iwl-config.h:472:36: warning: 'iwl_csr_v2' defined but not used [-Wunused-const-variable=] 472 | static const struct iwl_csr_params iwl_csr_v2 = { | ^~~~~~~~~~ drivers/net/wireless/intel/iwlwifi/mvm/../iwl-config.h:457:36: warning: 'iwl_csr_v1' defined but not used [-Wunused-const-variable=] 457 | static const struct iwl_csr_params iwl_csr_v1 = { | ^~~~~~~~~~ vim +321 drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c 287 288 struct ieee80211_regdomain *iwl_mvm_get_regdomain(struct wiphy *wiphy, 289 const char *alpha2, 290 enum iwl_mcc_source src_id, 291 bool *changed) 292 { 293 struct ieee80211_regdomain *regd = NULL; 294 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); 295 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 296 struct iwl_mcc_update_resp *resp; 297 298 IWL_DEBUG_LAR(mvm, "Getting regdomain data for %s from FW\n", alpha2); 299 300 lockdep_assert_held(&mvm->mutex); 301 302 resp = iwl_mvm_update_mcc(mvm, alpha2, src_id); 303 if (IS_ERR_OR_NULL(resp)) { 304 IWL_DEBUG_LAR(mvm, "Could not get update from FW %d\n", 305 PTR_ERR_OR_ZERO(resp)); 306 goto out; 307 } 308 309 if (changed) { 310 u32 status = le32_to_cpu(resp->status); 311 312 *changed = (status == MCC_RESP_NEW_CHAN_PROFILE || 313 status == MCC_RESP_ILLEGAL); 314 } 315 316 regd = iwl_parse_nvm_mcc_info(mvm->trans->dev, mvm->cfg, 317 __le32_to_cpu(resp->n_channels), 318 resp->channels, 319 __le16_to_cpu(resp->mcc), 320 __le16_to_cpu(resp->geo_info), 322 /* Store the return source id */ 323 src_id = resp->source_id; 324 kfree(resp); 325 if (IS_ERR_OR_NULL(regd)) { 326 IWL_DEBUG_LAR(mvm, "Could not get parse update from FW %d\n", 327 PTR_ERR_OR_ZERO(regd)); 328 goto out; 329 } 330 331 IWL_DEBUG_LAR(mvm, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n", 332 regd->alpha2, regd->alpha2[0], regd->alpha2[1], src_id); 333 mvm->lar_regdom_set = true; 334 mvm->mcc_src = src_id; 335 336 out: 337 return regd; 338 } 339 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org