Hi Grygorii, FYI, the error/warning still remains. tree: git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-rt-linux-5.10.y head: 43939f54c26e9885d7f59f18ee97dd76393606f9 commit: 6853acd9be4e17522e3c3b2ec30c3ce8e46b6b9e [7157/9316] HACK: net: ethernet: ti: cpsw: allow to configure min tx packet size config: mips-allyesconfig (attached as .config) compiler: mips-linux-gcc (GCC) 11.2.0 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 git remote add ti git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git git fetch --no-tags ti ti-rt-linux-5.10.y git checkout 6853acd9be4e17522e3c3b2ec30c3ce8e46b6b9e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/net/ethernet/ti/cpsw.c: In function 'cpsw_ndo_start_xmit': 916 | unsigned int len; | ^~~ vim +/len +916 drivers/net/ethernet/ti/cpsw.c 907 908 static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb, 909 struct net_device *ndev) 910 { 911 struct cpsw_priv *priv = netdev_priv(ndev); 912 struct cpsw_common *cpsw = priv->cpsw; 913 struct cpts *cpts = cpsw->cpts; 914 struct netdev_queue *txq; 915 struct cpdma_chan *txch; 917 int ret, q_idx; 918 919 if (skb_padto(skb, tx_packet_min)) { 920 cpsw_err(priv, tx_err, "packet pad failed\n"); 921 ndev->stats.tx_dropped++; 922 return NET_XMIT_DROP; 923 } 924 925 len = skb->len < tx_packet_min ? tx_packet_min : skb->len; 926 927 if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP && 928 priv->tx_ts_enabled && cpts_can_timestamp(cpts, skb)) 929 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 930 931 q_idx = skb_get_queue_mapping(skb); 932 if (q_idx >= cpsw->tx_ch_num) 933 q_idx = q_idx % cpsw->tx_ch_num; 934 935 txch = cpsw->txv[q_idx].ch; 936 txq = netdev_get_tx_queue(ndev, q_idx); 937 skb_tx_timestamp(skb); 938 ret = cpdma_chan_submit(txch, skb, skb->data, skb->len, 939 priv->emac_port + cpsw->data.dual_emac); 940 if (unlikely(ret != 0)) { 941 cpsw_err(priv, tx_err, "desc submit failed\n"); 942 goto fail; 943 } 944 945 /* If there is no more tx desc left free then we need to 946 * tell the kernel to stop sending us tx frames. 947 */ 948 if (unlikely(!cpdma_check_free_tx_desc(txch))) { 949 netif_tx_stop_queue(txq); 950 951 /* Barrier, so that stop_queue visible to other cpus */ 952 smp_mb__after_atomic(); 953 954 if (cpdma_check_free_tx_desc(txch)) 955 netif_tx_wake_queue(txq); 956 } 957 958 return NETDEV_TX_OK; 959 fail: 960 ndev->stats.tx_dropped++; 961 netif_tx_stop_queue(txq); 962 963 /* Barrier, so that stop_queue visible to other cpus */ 964 smp_mb__after_atomic(); 965 966 if (cpdma_check_free_tx_desc(txch)) 967 netif_tx_wake_queue(txq); 968 969 return NETDEV_TX_BUSY; 970 } 971 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org