Hi Ryder, I love your patch! Perhaps something to improve: [auto build test WARNING on wireless-drivers-next/master] [also build test WARNING on v5.14-rc1 next-20210714] [cannot apply to wireless-drivers/master] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Ryder-Lee/mt76-mt7915-take-RCU-read-lock-when-calling-ieee80211_bss_get_elem/20210714-133745 base: https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next.git master config: xtensa-allyesconfig (attached as .config) compiler: xtensa-linux-gcc (GCC) 9.3.0 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 # https://github.com/0day-ci/linux/commit/787e54058191f647390d63f0f608de62a3d3a3e8 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Ryder-Lee/mt76-mt7915-take-RCU-read-lock-when-calling-ieee80211_bss_get_elem/20210714-133745 git checkout 787e54058191f647390d63f0f608de62a3d3a3e8 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=xtensa If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): drivers/net/wireless/mediatek/mt76/mt7915/mac.c: In function 'mt7915_mac_tx_free': >> drivers/net/wireless/mediatek/mt76/mt7915/mac.c:1221:23: warning: variable 'phy' set but not used [-Wunused-but-set-variable] 1221 | struct mt7915_phy *phy; | ^~~ drivers/net/wireless/mediatek/mt76/mt7915/mac.c:1213:6: warning: variable 'stat' set but not used [-Wunused-but-set-variable] 1213 | u8 stat; | ^~~~ drivers/net/wireless/mediatek/mt76/mt7915/mac.c: In function 'mt7915_mac_add_txs_skb': >> drivers/net/wireless/mediatek/mt76/mt7915/mac.c:1271:21: warning: variable 'msta' set but not used [-Wunused-but-set-variable] 1271 | struct mt7915_sta *msta; | ^~~~ drivers/net/wireless/mediatek/mt76/mt7915/mac.c: In function 'mt7915_tx_complete_skb': drivers/net/wireless/mediatek/mt76/mt7915/mac.c:1463:21: warning: variable 'dev' set but not used [-Wunused-but-set-variable] 1463 | struct mt7915_dev *dev; | ^~~ vim +/phy +1221 drivers/net/wireless/mediatek/mt76/mt7915/mac.c e57b7901469fc0 Ryder Lee 2020-04-25 1183 338330bd26b1fe Felix Fietkau 2021-05-07 1184 static void 338330bd26b1fe Felix Fietkau 2021-05-07 1185 mt7915_mac_tx_free(struct mt7915_dev *dev, struct sk_buff *skb) e57b7901469fc0 Ryder Lee 2020-04-25 1186 { e57b7901469fc0 Ryder Lee 2020-04-25 1187 struct mt7915_tx_free *free = (struct mt7915_tx_free *)skb->data; e57b7901469fc0 Ryder Lee 2020-04-25 1188 struct mt76_dev *mdev = &dev->mt76; 4c430774e01b06 Lorenzo Bianconi 2020-11-13 1189 struct mt76_phy *mphy_ext = mdev->phy2; e57b7901469fc0 Ryder Lee 2020-04-25 1190 struct mt76_txwi_cache *txwi; e57b7901469fc0 Ryder Lee 2020-04-25 1191 struct ieee80211_sta *sta = NULL; 660915d052c606 Felix Fietkau 2020-09-01 1192 LIST_HEAD(free_list); 660915d052c606 Felix Fietkau 2020-09-01 1193 struct sk_buff *tmp; e57b7901469fc0 Ryder Lee 2020-04-25 1194 u8 i, count; 5342758d5522db Felix Fietkau 2020-11-21 1195 bool wake = false; e57b7901469fc0 Ryder Lee 2020-04-25 1196 f8a667a9af9198 Felix Fietkau 2020-08-22 1197 /* clean DMA queues and unmap buffers first */ 91990519298e23 Lorenzo Bianconi 2020-11-11 1198 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_PSD], false); 91990519298e23 Lorenzo Bianconi 2020-11-11 1199 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_BE], false); 4c430774e01b06 Lorenzo Bianconi 2020-11-13 1200 if (mphy_ext) { 4c430774e01b06 Lorenzo Bianconi 2020-11-13 1201 mt76_queue_tx_cleanup(dev, mphy_ext->q_tx[MT_TXQ_PSD], false); 4c430774e01b06 Lorenzo Bianconi 2020-11-13 1202 mt76_queue_tx_cleanup(dev, mphy_ext->q_tx[MT_TXQ_BE], false); 4c430774e01b06 Lorenzo Bianconi 2020-11-13 1203 } f8a667a9af9198 Felix Fietkau 2020-08-22 1204 e57b7901469fc0 Ryder Lee 2020-04-25 1205 /* e57b7901469fc0 Ryder Lee 2020-04-25 1206 * TODO: MT_TX_FREE_LATENCY is msdu time from the TXD is queued into PLE, e57b7901469fc0 Ryder Lee 2020-04-25 1207 * to the time ack is received or dropped by hw (air + hw queue time). e57b7901469fc0 Ryder Lee 2020-04-25 1208 * Should avoid accessing WTBL to get Tx airtime, and use it instead. e57b7901469fc0 Ryder Lee 2020-04-25 1209 */ e57b7901469fc0 Ryder Lee 2020-04-25 1210 count = FIELD_GET(MT_TX_FREE_MSDU_CNT, le16_to_cpu(free->ctrl)); e57b7901469fc0 Ryder Lee 2020-04-25 1211 for (i = 0; i < count; i++) { e57b7901469fc0 Ryder Lee 2020-04-25 1212 u32 msdu, info = le32_to_cpu(free->info[i]); e57b7901469fc0 Ryder Lee 2020-04-25 1213 u8 stat; e57b7901469fc0 Ryder Lee 2020-04-25 1214 e57b7901469fc0 Ryder Lee 2020-04-25 1215 /* e57b7901469fc0 Ryder Lee 2020-04-25 1216 * 1'b1: new wcid pair. e57b7901469fc0 Ryder Lee 2020-04-25 1217 * 1'b0: msdu_id with the same 'wcid pair' as above. e57b7901469fc0 Ryder Lee 2020-04-25 1218 */ e57b7901469fc0 Ryder Lee 2020-04-25 1219 if (info & MT_TX_FREE_PAIR) { e57b7901469fc0 Ryder Lee 2020-04-25 1220 struct mt7915_sta *msta; 1daf2522fa1604 Felix Fietkau 2020-07-26 @1221 struct mt7915_phy *phy; e57b7901469fc0 Ryder Lee 2020-04-25 1222 struct mt76_wcid *wcid; e57b7901469fc0 Ryder Lee 2020-04-25 1223 u16 idx; e57b7901469fc0 Ryder Lee 2020-04-25 1224 e57b7901469fc0 Ryder Lee 2020-04-25 1225 count++; e57b7901469fc0 Ryder Lee 2020-04-25 1226 idx = FIELD_GET(MT_TX_FREE_WLAN_ID, info); e57b7901469fc0 Ryder Lee 2020-04-25 1227 wcid = rcu_dereference(dev->mt76.wcid[idx]); e57b7901469fc0 Ryder Lee 2020-04-25 1228 sta = wcid_to_sta(wcid); e57b7901469fc0 Ryder Lee 2020-04-25 1229 if (!sta) e57b7901469fc0 Ryder Lee 2020-04-25 1230 continue; e57b7901469fc0 Ryder Lee 2020-04-25 1231 e57b7901469fc0 Ryder Lee 2020-04-25 1232 msta = container_of(wcid, struct mt7915_sta, wcid); 1daf2522fa1604 Felix Fietkau 2020-07-26 1233 phy = msta->vif->phy; 1daf2522fa1604 Felix Fietkau 2020-07-26 1234 spin_lock_bh(&dev->sta_poll_lock); 1daf2522fa1604 Felix Fietkau 2020-07-26 1235 if (list_empty(&msta->poll_list)) 1daf2522fa1604 Felix Fietkau 2020-07-26 1236 list_add_tail(&msta->poll_list, &dev->sta_poll_list); 1daf2522fa1604 Felix Fietkau 2020-07-26 1237 spin_unlock_bh(&dev->sta_poll_lock); 6425791d350301 Felix Fietkau 2020-09-27 1238 continue; e57b7901469fc0 Ryder Lee 2020-04-25 1239 } e57b7901469fc0 Ryder Lee 2020-04-25 1240 e57b7901469fc0 Ryder Lee 2020-04-25 1241 msdu = FIELD_GET(MT_TX_FREE_MSDU_ID, info); e57b7901469fc0 Ryder Lee 2020-04-25 1242 stat = FIELD_GET(MT_TX_FREE_STATUS, info); e57b7901469fc0 Ryder Lee 2020-04-25 1243 d089692bc7938a Lorenzo Bianconi 2021-04-20 1244 txwi = mt76_token_release(mdev, msdu, &wake); e57b7901469fc0 Ryder Lee 2020-04-25 1245 if (!txwi) e57b7901469fc0 Ryder Lee 2020-04-25 1246 continue; e57b7901469fc0 Ryder Lee 2020-04-25 1247 223fd4f8430810 Felix Fietkau 2021-05-07 1248 mt7915_txwi_free(dev, txwi, sta, &free_list); e57b7901469fc0 Ryder Lee 2020-04-25 1249 } 0f1c443ca9cfa0 Felix Fietkau 2020-08-20 1250 0f1c443ca9cfa0 Felix Fietkau 2020-08-20 1251 mt7915_mac_sta_poll(dev); 5342758d5522db Felix Fietkau 2020-11-21 1252 d089692bc7938a Lorenzo Bianconi 2021-04-20 1253 if (wake) d089692bc7938a Lorenzo Bianconi 2021-04-20 1254 mt76_set_tx_blocked(&dev->mt76, false); 5342758d5522db Felix Fietkau 2020-11-21 1255 781eef5b34c57d Felix Fietkau 2020-07-24 1256 mt76_worker_schedule(&dev->mt76.tx_worker); 660915d052c606 Felix Fietkau 2020-09-01 1257 660915d052c606 Felix Fietkau 2020-09-01 1258 napi_consume_skb(skb, 1); 660915d052c606 Felix Fietkau 2020-09-01 1259 660915d052c606 Felix Fietkau 2020-09-01 1260 list_for_each_entry_safe(skb, tmp, &free_list, list) { 660915d052c606 Felix Fietkau 2020-09-01 1261 skb_list_del_init(skb); 660915d052c606 Felix Fietkau 2020-09-01 1262 napi_consume_skb(skb, 1); 660915d052c606 Felix Fietkau 2020-09-01 1263 } e57b7901469fc0 Ryder Lee 2020-04-25 1264 } e57b7901469fc0 Ryder Lee 2020-04-25 1265 3de4cb1756565a Felix Fietkau 2021-05-07 1266 static bool 3de4cb1756565a Felix Fietkau 2021-05-07 1267 mt7915_mac_add_txs_skb(struct mt7915_dev *dev, struct mt76_wcid *wcid, int pid, 3de4cb1756565a Felix Fietkau 2021-05-07 1268 __le32 *txs_data) 3de4cb1756565a Felix Fietkau 2021-05-07 1269 { 787e54058191f6 Ryder Lee 2021-07-14 1270 struct ieee80211_supported_band *sband; 787e54058191f6 Ryder Lee 2021-07-14 @1271 struct mt7915_sta *msta; 3de4cb1756565a Felix Fietkau 2021-05-07 1272 struct mt76_dev *mdev = &dev->mt76; 787e54058191f6 Ryder Lee 2021-07-14 1273 struct mt76_phy *mphy; 3de4cb1756565a Felix Fietkau 2021-05-07 1274 struct ieee80211_tx_info *info; 3de4cb1756565a Felix Fietkau 2021-05-07 1275 struct sk_buff_head list; 787e54058191f6 Ryder Lee 2021-07-14 1276 struct rate_info rate = {}; 3de4cb1756565a Felix Fietkau 2021-05-07 1277 struct sk_buff *skb; 787e54058191f6 Ryder Lee 2021-07-14 1278 bool cck = false; 787e54058191f6 Ryder Lee 2021-07-14 1279 u32 txrate, txs; 3de4cb1756565a Felix Fietkau 2021-05-07 1280 3de4cb1756565a Felix Fietkau 2021-05-07 1281 mt76_tx_status_lock(mdev, &list); 3de4cb1756565a Felix Fietkau 2021-05-07 1282 skb = mt76_tx_status_skb_get(mdev, wcid, pid, &list); 3de4cb1756565a Felix Fietkau 2021-05-07 1283 if (!skb) 3de4cb1756565a Felix Fietkau 2021-05-07 1284 goto out; 3de4cb1756565a Felix Fietkau 2021-05-07 1285 787e54058191f6 Ryder Lee 2021-07-14 1286 txs = le32_to_cpu(txs_data[0]); 787e54058191f6 Ryder Lee 2021-07-14 1287 3de4cb1756565a Felix Fietkau 2021-05-07 1288 info = IEEE80211_SKB_CB(skb); 787e54058191f6 Ryder Lee 2021-07-14 1289 if (!(txs & MT_TXS0_ACK_ERROR_MASK)) 3de4cb1756565a Felix Fietkau 2021-05-07 1290 info->flags |= IEEE80211_TX_STAT_ACK; 3de4cb1756565a Felix Fietkau 2021-05-07 1291 3de4cb1756565a Felix Fietkau 2021-05-07 1292 info->status.ampdu_len = 1; 3de4cb1756565a Felix Fietkau 2021-05-07 1293 info->status.ampdu_ack_len = !!(info->flags & 3de4cb1756565a Felix Fietkau 2021-05-07 1294 IEEE80211_TX_STAT_ACK); 3de4cb1756565a Felix Fietkau 2021-05-07 1295 3de4cb1756565a Felix Fietkau 2021-05-07 1296 info->status.rates[0].idx = -1; 787e54058191f6 Ryder Lee 2021-07-14 1297 787e54058191f6 Ryder Lee 2021-07-14 1298 if (!wcid->sta) 787e54058191f6 Ryder Lee 2021-07-14 1299 goto out; 787e54058191f6 Ryder Lee 2021-07-14 1300 787e54058191f6 Ryder Lee 2021-07-14 1301 msta = container_of(wcid, struct mt7915_sta, wcid); 787e54058191f6 Ryder Lee 2021-07-14 1302 txrate = FIELD_GET(MT_TXS0_TX_RATE, txs); 787e54058191f6 Ryder Lee 2021-07-14 1303 787e54058191f6 Ryder Lee 2021-07-14 1304 rate.mcs = FIELD_GET(MT_TX_RATE_IDX, txrate); 787e54058191f6 Ryder Lee 2021-07-14 1305 rate.nss = FIELD_GET(MT_TX_RATE_NSS, txrate) + 1; 787e54058191f6 Ryder Lee 2021-07-14 1306 787e54058191f6 Ryder Lee 2021-07-14 1307 switch (FIELD_GET(MT_TX_RATE_MODE, txrate)) { 787e54058191f6 Ryder Lee 2021-07-14 1308 case MT_PHY_TYPE_CCK: 787e54058191f6 Ryder Lee 2021-07-14 1309 cck = true; 787e54058191f6 Ryder Lee 2021-07-14 1310 fallthrough; 787e54058191f6 Ryder Lee 2021-07-14 1311 case MT_PHY_TYPE_OFDM: 787e54058191f6 Ryder Lee 2021-07-14 1312 mphy = &dev->mphy; 787e54058191f6 Ryder Lee 2021-07-14 1313 if (wcid->ext_phy && dev->mt76.phy2) 787e54058191f6 Ryder Lee 2021-07-14 1314 mphy = dev->mt76.phy2; 787e54058191f6 Ryder Lee 2021-07-14 1315 787e54058191f6 Ryder Lee 2021-07-14 1316 if (mphy->chandef.chan->band == NL80211_BAND_5GHZ) 787e54058191f6 Ryder Lee 2021-07-14 1317 sband = &mphy->sband_5g.sband; 787e54058191f6 Ryder Lee 2021-07-14 1318 else 787e54058191f6 Ryder Lee 2021-07-14 1319 sband = &mphy->sband_2g.sband; 787e54058191f6 Ryder Lee 2021-07-14 1320 787e54058191f6 Ryder Lee 2021-07-14 1321 rate.mcs = mt76_get_rate(mphy->dev, sband, rate.mcs, cck); 787e54058191f6 Ryder Lee 2021-07-14 1322 rate.legacy = sband->bitrates[rate.mcs].bitrate; 787e54058191f6 Ryder Lee 2021-07-14 1323 break; 787e54058191f6 Ryder Lee 2021-07-14 1324 case MT_PHY_TYPE_HT: 787e54058191f6 Ryder Lee 2021-07-14 1325 case MT_PHY_TYPE_HT_GF: 787e54058191f6 Ryder Lee 2021-07-14 1326 rate.mcs += (rate.nss - 1) * 8; 787e54058191f6 Ryder Lee 2021-07-14 1327 if (rate.mcs > 31) 787e54058191f6 Ryder Lee 2021-07-14 1328 goto out; 787e54058191f6 Ryder Lee 2021-07-14 1329 787e54058191f6 Ryder Lee 2021-07-14 1330 rate.flags = RATE_INFO_FLAGS_MCS; 787e54058191f6 Ryder Lee 2021-07-14 1331 if (wcid->rate.flags & RATE_INFO_FLAGS_SHORT_GI) 787e54058191f6 Ryder Lee 2021-07-14 1332 rate.flags |= RATE_INFO_FLAGS_SHORT_GI; 787e54058191f6 Ryder Lee 2021-07-14 1333 break; 787e54058191f6 Ryder Lee 2021-07-14 1334 case MT_PHY_TYPE_VHT: 787e54058191f6 Ryder Lee 2021-07-14 1335 if (rate.mcs > 9) 787e54058191f6 Ryder Lee 2021-07-14 1336 goto out; 787e54058191f6 Ryder Lee 2021-07-14 1337 787e54058191f6 Ryder Lee 2021-07-14 1338 rate.flags = RATE_INFO_FLAGS_VHT_MCS; 787e54058191f6 Ryder Lee 2021-07-14 1339 break; 787e54058191f6 Ryder Lee 2021-07-14 1340 case MT_PHY_TYPE_HE_SU: 787e54058191f6 Ryder Lee 2021-07-14 1341 case MT_PHY_TYPE_HE_EXT_SU: 787e54058191f6 Ryder Lee 2021-07-14 1342 case MT_PHY_TYPE_HE_TB: 787e54058191f6 Ryder Lee 2021-07-14 1343 case MT_PHY_TYPE_HE_MU: 787e54058191f6 Ryder Lee 2021-07-14 1344 if (rate.mcs > 11) 787e54058191f6 Ryder Lee 2021-07-14 1345 goto out; 787e54058191f6 Ryder Lee 2021-07-14 1346 787e54058191f6 Ryder Lee 2021-07-14 1347 rate.he_gi = wcid->rate.he_gi; 787e54058191f6 Ryder Lee 2021-07-14 1348 rate.he_dcm = FIELD_GET(MT_TX_RATE_DCM, txrate); 787e54058191f6 Ryder Lee 2021-07-14 1349 rate.flags = RATE_INFO_FLAGS_HE_MCS; 787e54058191f6 Ryder Lee 2021-07-14 1350 break; 787e54058191f6 Ryder Lee 2021-07-14 1351 default: 787e54058191f6 Ryder Lee 2021-07-14 1352 goto out; 787e54058191f6 Ryder Lee 2021-07-14 1353 } 787e54058191f6 Ryder Lee 2021-07-14 1354 787e54058191f6 Ryder Lee 2021-07-14 1355 switch (FIELD_GET(MT_TXS0_BW, txs)) { 787e54058191f6 Ryder Lee 2021-07-14 1356 case IEEE80211_STA_RX_BW_160: 787e54058191f6 Ryder Lee 2021-07-14 1357 rate.bw = RATE_INFO_BW_160; 787e54058191f6 Ryder Lee 2021-07-14 1358 break; 787e54058191f6 Ryder Lee 2021-07-14 1359 case IEEE80211_STA_RX_BW_80: 787e54058191f6 Ryder Lee 2021-07-14 1360 rate.bw = RATE_INFO_BW_80; 787e54058191f6 Ryder Lee 2021-07-14 1361 break; 787e54058191f6 Ryder Lee 2021-07-14 1362 case IEEE80211_STA_RX_BW_40: 787e54058191f6 Ryder Lee 2021-07-14 1363 rate.bw = RATE_INFO_BW_40; 787e54058191f6 Ryder Lee 2021-07-14 1364 break; 787e54058191f6 Ryder Lee 2021-07-14 1365 default: 787e54058191f6 Ryder Lee 2021-07-14 1366 rate.bw = RATE_INFO_BW_20; 787e54058191f6 Ryder Lee 2021-07-14 1367 break; 787e54058191f6 Ryder Lee 2021-07-14 1368 } 787e54058191f6 Ryder Lee 2021-07-14 1369 wcid->rate = rate; 3de4cb1756565a Felix Fietkau 2021-05-07 1370 3de4cb1756565a Felix Fietkau 2021-05-07 1371 out: 787e54058191f6 Ryder Lee 2021-07-14 1372 mt76_tx_status_skb_done(mdev, skb, &list); 3de4cb1756565a Felix Fietkau 2021-05-07 1373 mt76_tx_status_unlock(mdev, &list); 3de4cb1756565a Felix Fietkau 2021-05-07 1374 3de4cb1756565a Felix Fietkau 2021-05-07 1375 return !!skb; 3de4cb1756565a Felix Fietkau 2021-05-07 1376 } 3de4cb1756565a Felix Fietkau 2021-05-07 1377 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
Attachment:
.config.gz
Description: application/gzip
