CC: [email protected] CC: [email protected] BCC: [email protected] CC: [email protected] TO: Lorenzo Bianconi <[email protected]> CC: Felix Fietkau <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: ce522ba9ef7e2d9fb22a39eb3371c0c64e2a433e commit: 2663ce498459bae8e47140cc34147e16bf68af8c mt76: mt7915: rely on mt76_connac_mcu_sta_basic_tlv date: 10 weeks ago :::::: branch date: 34 hours ago :::::: commit date: 10 weeks ago config: riscv-randconfig-c006-20220410 (https://download.01.org/0day-ci/archive/20220412/[email protected]/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 256c6b0ba14e8a7ab6373b61b7193ea8c0a3651c) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2663ce498459bae8e47140cc34147e16bf68af8c git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 2663ce498459bae8e47140cc34147e16bf68af8c # save the config file to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv clang-analyzer If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> clang-analyzer warnings: (new ones prefixed by >>) ^ sound/core/memalloc.c:102:3: note: Taking false branch if (err != -ENOMEM) ^ sound/core/memalloc.c:104:7: note: Assuming the condition is false if (size <= PAGE_SIZE) ^~~~~~~~~~~~~~~~~ sound/core/memalloc.c:104:3: note: Taking false branch if (size <= PAGE_SIZE) ^ sound/core/memalloc.c:107:23: note: Calling 'get_order' size = PAGE_SIZE << get_order(size); ^~~~~~~~~~~~~~~ include/asm-generic/getorder.h:31:2: note: Taking false branch if (__builtin_constant_p(size)) { ^ include/asm-generic/getorder.h:44:9: note: Calling 'fls' return fls(size); ^~~~~~~~~ include/asm-generic/bitops/fls.h:15:2: note: 'r' initialized to 32 int r = 32; ^~~~~ include/asm-generic/bitops/fls.h:17:6: note: Assuming 'x' is not equal to 0, which participates in a condition later if (!x) ^~ include/asm-generic/bitops/fls.h:17:2: note: Taking false branch if (!x) ^ include/asm-generic/bitops/fls.h:19:6: note: Assuming the condition is false if (!(x & 0xffff0000u)) { ^~~~~~~~~~~~~~~~~~ include/asm-generic/bitops/fls.h:19:2: note: Taking false branch if (!(x & 0xffff0000u)) { ^ include/asm-generic/bitops/fls.h:23:6: note: Assuming the condition is false if (!(x & 0xff000000u)) { ^~~~~~~~~~~~~~~~~~ include/asm-generic/bitops/fls.h:23:2: note: Taking false branch if (!(x & 0xff000000u)) { ^ include/asm-generic/bitops/fls.h:27:6: note: Assuming the condition is false if (!(x & 0xf0000000u)) { ^~~~~~~~~~~~~~~~~~ include/asm-generic/bitops/fls.h:27:2: note: Taking false branch if (!(x & 0xf0000000u)) { ^ include/asm-generic/bitops/fls.h:31:6: note: Assuming the condition is false if (!(x & 0xc0000000u)) { ^~~~~~~~~~~~~~~~~~ include/asm-generic/bitops/fls.h:31:2: note: Taking false branch if (!(x & 0xc0000000u)) { ^ include/asm-generic/bitops/fls.h:35:6: note: Assuming the condition is false if (!(x & 0x80000000u)) { ^~~~~~~~~~~~~~~~~~ include/asm-generic/bitops/fls.h:35:2: note: Taking false branch if (!(x & 0x80000000u)) { ^ include/asm-generic/bitops/fls.h:39:2: note: Returning the value 32 (loaded from 'r') return r; ^~~~~~~~ include/asm-generic/getorder.h:44:9: note: Returning from 'fls' return fls(size); ^~~~~~~~~ include/asm-generic/getorder.h:44:2: note: Returning the value 32 return fls(size); ^~~~~~~~~~~~~~~~ sound/core/memalloc.c:107:23: note: Returning from 'get_order' size = PAGE_SIZE << get_order(size); ^~~~~~~~~~~~~~~ sound/core/memalloc.c:107:20: note: The result of the left shift is undefined due to shifting by '32', which is greater or equal to the width of type 'unsigned long' size = PAGE_SIZE << get_order(size); ^ ~~~~~~~~~~~~~~~ Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 2 warnings generated. Suppressed 2 warnings (2 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c:178:3: warning: Value stored to 'nss' is never read [clang-analyzer-deadcode.DeadStores] nss = nss_band; ^ ~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c:178:3: note: Value stored to 'nss' is never read nss = nss_band; ^ ~~~~~~~~ Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. >> drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1415:15: warning: Assigned >> value is garbage or undefined [clang-analyzer-core.uninitialized.Assign] bf->mem_20m = matrix[bf->nrow][bf->ncol]; ^ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1811:9: note: Assuming 'sta' is non-null msta = sta ? (struct mt7915_sta *)sta->drv_priv : &mvif->sta; ^~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1811:9: note: '?' condition is true drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1815:2: note: Taking false branch if (IS_ERR(skb)) ^ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1820:6: note: Assuming 'enable' is true if (!enable) ^~~~~~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1820:2: note: Taking false branch if (!enable) ^ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1824:6: note: 'sta' is non-null if (sta && sta->ht_cap.ht_supported) { ^~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1824:6: note: Left side of '&&' is true drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1824:13: note: Assuming field 'ht_supported' is true if (sta && sta->ht_cap.ht_supported) { ^~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1824:2: note: Taking true branch if (sta && sta->ht_cap.ht_supported) { ^ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1826:3: note: Calling 'mt7915_mcu_sta_bfer_tlv' mt7915_mcu_sta_bfer_tlv(dev, skb, vif, sta); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1370:3: note: Assuming field 'band_idx' is 0 mvif->mt76.band_idx ? mt7915_ext_phy(dev) : &dev->phy; ^~~~~~~~~~~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1370:3: note: '?' condition is false drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1371:15: note: '?' condition is false int tx_ant = hweight8(phy->mt76->chainmask) - 1; ^ include/asm-generic/bitops/const_hweight.h:26:23: note: expanded from macro 'hweight8' #define hweight8(w) (__builtin_constant_p(w) ? __const_hweight8(w) : __arch_hweight8(w)) ^ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1382:8: note: Calling 'mt7915_is_ebf_supported' ebf = mt7915_is_ebf_supported(phy, vif, sta, false); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1199:15: note: '?' condition is false int tx_ant = hweight8(phy->mt76->chainmask) - 1; ^ include/asm-generic/bitops/const_hweight.h:26:23: note: expanded from macro 'hweight8' #define hweight8(w) (__builtin_constant_p(w) ? __const_hweight8(w) : __arch_hweight8(w)) ^ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1201:6: note: Assuming field 'type' is equal to NL80211_IFTYPE_STATION if (vif->type != NL80211_IFTYPE_STATION && ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1201:42: note: Left side of '&&' is false if (vif->type != NL80211_IFTYPE_STATION && ^ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1205:7: note: 'bfee' is false if (!bfee && tx_ant < 2) ^~~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1205:6: note: Left side of '&&' is true if (!bfee && tx_ant < 2) ^ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1205:15: note: Assuming 'tx_ant' is >= 2 if (!bfee && tx_ant < 2) ^~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1205:2: note: Taking false branch if (!bfee && tx_ant < 2) ^ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1208:6: note: Assuming field 'has_he' is true, which participates in a condition later if (sta->he_cap.has_he) { ^~~~~~~~~~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1208:2: note: Taking true branch if (sta->he_cap.has_he) { ^ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1211:7: note: 'bfee' is false if (bfee) ^~~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1211:3: note: Taking false branch if (bfee) ^ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1215:11: note: Assuming field 'he_su_ebfer' is true return mvif->cap.he_su_ebfer && ^~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1215:11: note: Left side of '&&' is true drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1215:4: note: Returning without writing to 'sta->he_cap.has_he', which participates in a condition later return mvif->cap.he_su_ebfer && ^ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1215:4: note: Returning value, which participates in a condition later return mvif->cap.he_su_ebfer && ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1382:8: note: Returning from 'mt7915_is_ebf_supported' ebf = mt7915_is_ebf_supported(phy, vif, sta, false); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1383:6: note: Assuming 'ebf' is true if (!ebf && !dev->ibf) ^~~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1383:11: note: Left side of '&&' is false if (!ebf && !dev->ibf) ^ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1393:18: note: Field 'has_he' is true if (sta->he_cap.has_he && ebf) ^ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:1393:6: note: Left side of '&&' is true vim +1415 drivers/net/wireless/mediatek/mt76/mt7915/mcu.c 89029a85482cbc Ryder Lee 2020-05-12 1363 89029a85482cbc Ryder Lee 2020-05-12 1364 static void f89f297aef2815 Ryder Lee 2021-10-18 1365 mt7915_mcu_sta_bfer_tlv(struct mt7915_dev *dev, struct sk_buff *skb, f89f297aef2815 Ryder Lee 2021-10-18 1366 struct ieee80211_vif *vif, struct ieee80211_sta *sta) 89029a85482cbc Ryder Lee 2020-05-12 1367 { f89f297aef2815 Ryder Lee 2021-10-18 1368 struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv; f89f297aef2815 Ryder Lee 2021-10-18 1369 struct mt7915_phy *phy = 6cf4392f248903 Lorenzo Bianconi 2021-12-14 1370 mvif->mt76.band_idx ? mt7915_ext_phy(dev) : &dev->phy; b9027e0816ebbc Lorenzo Bianconi 2021-01-05 1371 int tx_ant = hweight8(phy->mt76->chainmask) - 1; 89029a85482cbc Ryder Lee 2020-05-12 1372 struct sta_rec_bf *bf; 89029a85482cbc Ryder Lee 2020-05-12 1373 struct tlv *tlv; 89029a85482cbc Ryder Lee 2020-05-12 1374 const u8 matrix[4][4] = { 89029a85482cbc Ryder Lee 2020-05-12 1375 {0, 0, 0, 0}, 89029a85482cbc Ryder Lee 2020-05-12 1376 {1, 1, 0, 0}, /* 2x1, 2x2, 2x3, 2x4 */ 89029a85482cbc Ryder Lee 2020-05-12 1377 {2, 4, 4, 0}, /* 3x1, 3x2, 3x3, 3x4 */ 89029a85482cbc Ryder Lee 2020-05-12 1378 {3, 5, 6, 0} /* 4x1, 4x2, 4x3, 4x4 */ 89029a85482cbc Ryder Lee 2020-05-12 1379 }; f89f297aef2815 Ryder Lee 2021-10-18 1380 bool ebf; 89029a85482cbc Ryder Lee 2020-05-12 1381 f89f297aef2815 Ryder Lee 2021-10-18 1382 ebf = mt7915_is_ebf_supported(phy, vif, sta, false); f89f297aef2815 Ryder Lee 2021-10-18 1383 if (!ebf && !dev->ibf) f89f297aef2815 Ryder Lee 2021-10-18 1384 return; 89029a85482cbc Ryder Lee 2020-05-12 1385 069c8e341ad537 Lorenzo Bianconi 2021-12-19 1386 tlv = mt76_connac_mcu_add_tlv(skb, STA_REC_BF, sizeof(*bf)); 89029a85482cbc Ryder Lee 2020-05-12 1387 bf = (struct sta_rec_bf *)tlv; 89029a85482cbc Ryder Lee 2020-05-12 1388 6d6dc980e07d1f Ryder Lee 2021-01-14 1389 /* he: eBF only, in accordance with spec 6d6dc980e07d1f Ryder Lee 2021-01-14 1390 * vht: support eBF and iBF 6d6dc980e07d1f Ryder Lee 2021-01-14 1391 * ht: iBF only, since mac80211 lacks of eBF support 6d6dc980e07d1f Ryder Lee 2021-01-14 1392 */ f89f297aef2815 Ryder Lee 2021-10-18 1393 if (sta->he_cap.has_he && ebf) 6d6dc980e07d1f Ryder Lee 2021-01-14 1394 mt7915_mcu_sta_bfer_he(sta, vif, phy, bf); 6d6dc980e07d1f Ryder Lee 2021-01-14 1395 else if (sta->vht_cap.vht_supported) f89f297aef2815 Ryder Lee 2021-10-18 1396 mt7915_mcu_sta_bfer_vht(sta, phy, bf, ebf); 6d6dc980e07d1f Ryder Lee 2021-01-14 1397 else if (sta->ht_cap.ht_supported) 6d6dc980e07d1f Ryder Lee 2021-01-14 1398 mt7915_mcu_sta_bfer_ht(sta, phy, bf); 6d6dc980e07d1f Ryder Lee 2021-01-14 1399 else 6d6dc980e07d1f Ryder Lee 2021-01-14 1400 return; 6d6dc980e07d1f Ryder Lee 2021-01-14 1401 a56c431ededa4e Ryder Lee 2021-10-18 1402 bf->bf_cap = ebf ? ebf : dev->ibf << 1; 89029a85482cbc Ryder Lee 2020-05-12 1403 bf->bw = sta->bandwidth; 89029a85482cbc Ryder Lee 2020-05-12 1404 bf->ibf_dbw = sta->bandwidth; 89029a85482cbc Ryder Lee 2020-05-12 1405 bf->ibf_nrow = tx_ant; 89029a85482cbc Ryder Lee 2020-05-12 1406 a56c431ededa4e Ryder Lee 2021-10-18 1407 if (!ebf && sta->bandwidth <= IEEE80211_STA_RX_BW_40 && !bf->ncol) 6d6dc980e07d1f Ryder Lee 2021-01-14 1408 bf->ibf_timeout = 0x48; 6d6dc980e07d1f Ryder Lee 2021-01-14 1409 else 6d6dc980e07d1f Ryder Lee 2021-01-14 1410 bf->ibf_timeout = 0x18; 89029a85482cbc Ryder Lee 2020-05-12 1411 a56c431ededa4e Ryder Lee 2021-10-18 1412 if (ebf && bf->nrow != tx_ant) a56c431ededa4e Ryder Lee 2021-10-18 1413 bf->mem_20m = matrix[tx_ant][bf->ncol]; 89029a85482cbc Ryder Lee 2020-05-12 1414 else a56c431ededa4e Ryder Lee 2021-10-18 @1415 bf->mem_20m = matrix[bf->nrow][bf->ncol]; 89029a85482cbc Ryder Lee 2020-05-12 1416 89029a85482cbc Ryder Lee 2020-05-12 1417 switch (sta->bandwidth) { 89029a85482cbc Ryder Lee 2020-05-12 1418 case IEEE80211_STA_RX_BW_160: 89029a85482cbc Ryder Lee 2020-05-12 1419 case IEEE80211_STA_RX_BW_80: 89029a85482cbc Ryder Lee 2020-05-12 1420 bf->mem_total = bf->mem_20m * 2; 89029a85482cbc Ryder Lee 2020-05-12 1421 break; 89029a85482cbc Ryder Lee 2020-05-12 1422 case IEEE80211_STA_RX_BW_40: 89029a85482cbc Ryder Lee 2020-05-12 1423 bf->mem_total = bf->mem_20m; 89029a85482cbc Ryder Lee 2020-05-12 1424 break; 89029a85482cbc Ryder Lee 2020-05-12 1425 case IEEE80211_STA_RX_BW_20: 89029a85482cbc Ryder Lee 2020-05-12 1426 default: 89029a85482cbc Ryder Lee 2020-05-12 1427 break; 89029a85482cbc Ryder Lee 2020-05-12 1428 } 89029a85482cbc Ryder Lee 2020-05-12 1429 } 89029a85482cbc Ryder Lee 2020-05-12 1430 :::::: The code at line 1415 was first introduced by commit :::::: a56c431ededa4e0f02cf4740cc5cd76063d3df1e mt76: mt7915: improve starec readability of txbf :::::: TO: Ryder Lee <[email protected]> :::::: CC: Felix Fietkau <[email protected]> -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ kbuild mailing list -- [email protected] To unsubscribe send an email to [email protected]
