Hi Ansuel, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Ansuel-Smith/Add-support-for-qca... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 59d58d93af94d7b546f12438b4a3d781b7190095 config: arm-randconfig-s031-20211209 (https://download.01.org/0day-ci/archive/20211210/202112100354.XoEu9gUo-lk...) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 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: v0.6.4-dirty # https://github.com/0day-ci/linux/commit/1283a493fbd646756be33415ab9d3830d... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Ansuel-Smith/Add-support-for-qca8k-mdio-rw-in-Ethernet-packet/20211208-114220 git checkout 1283a493fbd646756be33415ab9d3830d6ffb0af # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm SHELL=/bin/bash drivers/net/bonding/ drivers/net/dsa/ 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/dsa/qca8k.c:205:26: sparse: expected unsigned short [usertype] hdr drivers/net/dsa/qca8k.c:205:26: sparse: got restricted __be16 [usertype] vim +205 drivers/net/dsa/qca8k.c 173 174 static struct sk_buff *qca8k_alloc_mdio_header(struct qca8k_port_tag *header, enum mdio_cmd cmd, 175 u32 reg, u32 *val) 176 { 177 struct mdio_ethhdr *mdio_ethhdr; 178 struct sk_buff *skb; 179 u16 hdr; 180 181 skb = dev_alloc_skb(QCA_HDR_MDIO_PKG_LEN); 182 183 prefetchw(skb->data); 184 185 skb_reset_mac_header(skb); 186 skb_set_network_header(skb, skb->len); 187 188 mdio_ethhdr = skb_push(skb, QCA_HDR_MDIO_HEADER_LEN + QCA_HDR_LEN); 189 190 hdr = FIELD_PREP(QCA_HDR_XMIT_VERSION, QCA_HDR_VERSION); 191 hdr |= QCA_HDR_XMIT_FROM_CPU; 192 hdr |= FIELD_PREP(QCA_HDR_XMIT_DP_BIT, BIT(0)); 193 hdr |= FIELD_PREP(QCA_HDR_XMIT_CONTROL, QCA_HDR_XMIT_TYPE_RW_REG); 194 195 mdio_ethhdr->seq = FIELD_PREP(QCA_HDR_MDIO_SEQ_NUM, 200); 196 197 mdio_ethhdr->command = FIELD_PREP(QCA_HDR_MDIO_ADDR, reg); 198 mdio_ethhdr->command |= FIELD_PREP(QCA_HDR_MDIO_LENGTH, 4); 199 mdio_ethhdr->command |= FIELD_PREP(QCA_HDR_MDIO_CMD, cmd); 200 mdio_ethhdr->command |= FIELD_PREP(QCA_HDR_MDIO_CHECK_CODE, MDIO_CHECK_CODE_VAL); 201 202 if (cmd == MDIO_WRITE) 203 mdio_ethhdr->mdio_data = *val; 204 206 207 skb_put_zero(skb, QCA_HDR_MDIO_DATA2_LEN); 208 skb_put_zero(skb, QCA_HDR_MDIO_PADDING_LEN); 209 210 return skb; 211 } 212 213 static int qca8k_read_eth(struct qca8k_priv *priv, u32 reg, u32 *val) 214 { 215 struct qca8k_port_tag *header = priv->header_mdio; 216 struct sk_buff *skb; 217 bool ack; 218 int ret; 219 221 skb->dev = dsa_to_port(priv->ds, 0)->master; 222 223 mutex_lock(&header->mdio_mutex); 224 225 reinit_completion(&header->rw_done); 226 header->seq = 200; 227 header->ack = false; 228 229 dev_queue_xmit(skb); 230 231 ret = wait_for_completion_timeout(&header->rw_done, QCA8K_MDIO_RW_ETHERNET); 232 233 *val = header->data[0]; 234 ack = header->ack; 235 236 mutex_unlock(&header->mdio_mutex); 237 238 if (ret <= 0) 239 return -ETIMEDOUT; 240 241 if (!ack) 242 return -EINVAL; 243 244 return 0; 245 } 246 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org