tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 4b74e088fef6ce8cc513f935ce236c38bdf5f67b commit: def975307c01191b6f0170048c3724b0ed3348af [3051/3376] net: dsa: qca8k: add LAG support config: x86_64-randconfig-a002-20211124 (https://download.01.org/0day-ci/archive/20211125/202111250337.3sBzIJgK-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 67a1c45def8a75061203461ab0060c75c864df1c) 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://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 def975307c01191b6f0170048c3724b0ed3348af # save the config file to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64 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 >>): if (info->hash_type != NETDEV_LAG_HASH_L2 || ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~ hash |= QCA8K_TRUNK_HASH_SIP_EN; ^~~~ drivers/net/dsa/qca8k.c:2246:10: note: initialize the variable 'hash' to silence this warning u32 hash; ^ = 0 2 warnings generated. vim +2231 drivers/net/dsa/qca8k.c 2208 2209 static bool 2210 qca8k_lag_can_offload(struct dsa_switch *ds, 2211 struct net_device *lag, 2212 struct netdev_lag_upper_info *info) 2213 { 2214 struct dsa_port *dp; 2215 int id, members = 0; 2216 2217 id = dsa_lag_id(ds->dst, lag); 2218 if (id < 0 || id >= ds->num_lag_ids) 2219 return false; 2220 2221 dsa_lag_foreach_port(dp, ds->dst, lag) 2222 /* Includes the port joining the LAG */ 2223 members++; 2224 2225 if (members > QCA8K_NUM_PORTS_FOR_LAG) 2226 return false; 2227 2228 if (info->tx_type != NETDEV_LAG_TX_TYPE_HASH) 2229 return false; 2230 2232 info->hash_type != NETDEV_LAG_HASH_L23) 2233 return false; 2234 2235 return true; 2236 } 2237 2238 static int 2239 qca8k_lag_setup_hash(struct dsa_switch *ds, 2240 struct net_device *lag, 2241 struct netdev_lag_upper_info *info) 2242 { 2243 struct qca8k_priv *priv = ds->priv; 2244 bool unique_lag = true; 2245 int i, id; 2246 u32 hash; 2247 2248 id = dsa_lag_id(ds->dst, lag); 2249 2250 switch (info->hash_type) { 2251 case NETDEV_LAG_HASH_L23: 2253 hash |= QCA8K_TRUNK_HASH_DIP_EN; 2254 fallthrough; 2255 case NETDEV_LAG_HASH_L2: 2256 hash |= QCA8K_TRUNK_HASH_SA_EN; 2257 hash |= QCA8K_TRUNK_HASH_DA_EN; 2258 break; 2259 default: /* We should NEVER reach this */ 2260 return -EOPNOTSUPP; 2261 } 2262 2263 /* Check if we are the unique configured LAG */ 2264 dsa_lags_foreach_id(i, ds->dst) 2265 if (i != id && dsa_lag_dev(ds->dst, i)) { 2266 unique_lag = false; 2267 break; 2268 } 2269 2270 /* Hash Mode is global. Make sure the same Hash Mode 2271 * is set to all the 4 possible lag. 2272 * If we are the unique LAG we can set whatever hash 2273 * mode we want. 2274 * To change hash mode it's needed to remove all LAG 2275 * and change the mode with the latest. 2276 */ 2277 if (unique_lag) { 2278 priv->lag_hash_mode = hash; 2279 } else if (priv->lag_hash_mode != hash) { 2280 netdev_err(lag, "Error: Mismateched Hash Mode across different lag is not supported\n"); 2281 return -EOPNOTSUPP; 2282 } 2283 2284 return regmap_update_bits(priv->regmap, QCA8K_TRUNK_HASH_EN_CTRL, 2285 QCA8K_TRUNK_HASH_MASK, hash); 2286 } 2287 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org