tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: d61c8b66c84080ecf8f9f4d9272ab4ec78029a59 commit: 3cce2b98e0241ff238e25eca1dbb480534a7695a [11193/12612] mt76: mt7921: introduce mac tx done handling config: powerpc-allyesconfig (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 3cce2b98e0241ff238e25eca1dbb480534a7695a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=powerpc 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 >>) vim +829 drivers/net/wireless/mediatek/mt76/mt7921/mac.c 751 752 void mt7921_mac_write_txwi(struct mt7921_dev *dev, __le32 *txwi, 753 struct sk_buff *skb, struct mt76_wcid *wcid, 754 struct ieee80211_key_conf *key, bool beacon) 755 { 756 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 757 struct ieee80211_vif *vif = info->control.vif; 758 struct mt76_phy *mphy = &dev->mphy; 759 u8 pid, p_fmt, q_idx, omac_idx = 0, wmm_idx = 0; 760 bool is_8023 = info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP; 761 u16 tx_count = 15; 762 u32 val; 763 764 if (vif) { 765 struct mt76_vif *mvif = (struct mt76_vif *)vif->drv_priv; 766 767 omac_idx = mvif->omac_idx; 768 wmm_idx = mvif->wmm_idx; 769 } 770 771 if (beacon) { 772 p_fmt = MT_TX_TYPE_FW; 773 q_idx = MT_LMAC_BCN0; 774 } else if (skb_get_queue_mapping(skb) >= MT_TXQ_PSD) { 775 p_fmt = MT_TX_TYPE_CT; 776 q_idx = MT_LMAC_ALTX0; 777 } else { 778 p_fmt = MT_TX_TYPE_CT; 779 q_idx = wmm_idx * MT7921_MAX_WMM_SETS + 780 mt7921_lmac_mapping(dev, skb_get_queue_mapping(skb)); 781 } 782 783 val = FIELD_PREP(MT_TXD0_TX_BYTES, skb->len + MT_TXD_SIZE) | 784 FIELD_PREP(MT_TXD0_PKT_FMT, p_fmt) | 785 FIELD_PREP(MT_TXD0_Q_IDX, q_idx); 786 txwi[0] = cpu_to_le32(val); 787 788 val = MT_TXD1_LONG_FORMAT | 789 FIELD_PREP(MT_TXD1_WLAN_IDX, wcid->idx) | 790 FIELD_PREP(MT_TXD1_OWN_MAC, omac_idx); 791 792 txwi[1] = cpu_to_le32(val); 793 txwi[2] = 0; 794 795 val = FIELD_PREP(MT_TXD3_REM_TX_COUNT, tx_count); 796 if (key) 797 val |= MT_TXD3_PROTECT_FRAME; 798 if (info->flags & IEEE80211_TX_CTL_NO_ACK) 799 val |= MT_TXD3_NO_ACK; 800 801 txwi[3] = cpu_to_le32(val); 802 txwi[4] = 0; 803 txwi[5] = 0; 804 txwi[6] = 0; 805 txwi[7] = wcid->amsdu ? cpu_to_le32(MT_TXD7_HW_AMSDU) : 0; 806 807 if (is_8023) 808 mt7921_mac_write_txwi_8023(dev, txwi, skb, wcid); 809 else 810 mt7921_mac_write_txwi_80211(dev, txwi, skb, key); 811 812 if (txwi[2] & cpu_to_le32(MT_TXD2_FIX_RATE)) { 813 u16 rate; 814 815 /* hardware won't add HTC for mgmt/ctrl frame */ 816 txwi[2] |= cpu_to_le32(MT_TXD2_HTC_VLD); 817 818 if (mphy->chandef.chan->band == NL80211_BAND_5GHZ) 819 rate = MT7921_5G_RATE_DEFAULT; 820 else 821 rate = MT7921_2G_RATE_DEFAULT; 822 823 val = MT_TXD6_FIXED_BW | 824 FIELD_PREP(MT_TXD6_TX_RATE, rate); 825 txwi[6] |= cpu_to_le32(val); 826 txwi[3] |= cpu_to_le32(MT_TXD3_BA_DISABLE); 827 } 828 830 (IEEE80211_FTYPE_DATA >> 2)) && 831 mt7921_next_txs_timeout(dev, wcid)) { 832 mt7921_next_txs_set(dev, wcid, 250); 833 pid = mt7921_next_pid(dev, wcid); 834 val = MT_TXD5_TX_STATUS_MCU | FIELD_PREP(MT_TXD5_PID, pid); 835 txwi[5] |= cpu_to_le32(val); 836 } 837 } 838 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org