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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Michael Dege Subject: Re: [PATCH net-next 13/13] net: renesas: rswitch: add vlan aware switching Message-ID: <202603190927.5oLw58VC-lkp@intel.com> References: <20260317-rswitch_add_vlans-v1-13-3a57bfa0f2d1@renesas.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260317-rswitch_add_vlans-v1-13-3a57bfa0f2d1@renesas.com> Hi Michael, kernel test robot noticed the following build warnings: [auto build test WARNING on 1f318b96cc84d7c2ab792fcc0bfd42a7ca890681] url: https://github.com/intel-lab-lkp/linux/commits/Michael-Dege/net-renesas-rswitch-improve-port-change-mode-functions/20260318-221709 base: 1f318b96cc84d7c2ab792fcc0bfd42a7ca890681 patch link: https://lore.kernel.org/r/20260317-rswitch_add_vlans-v1-13-3a57bfa0f2d1%40renesas.com patch subject: [PATCH net-next 13/13] net: renesas: rswitch: add vlan aware switching config: sparc64-allmodconfig (https://download.01.org/0day-ci/archive/20260319/202603190927.5oLw58VC-lkp@intel.com/config) compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 4abb927bacf37f18f6359a41639a6d1b3bffffb5) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260319/202603190927.5oLw58VC-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202603190927.5oLw58VC-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/net/ethernet/renesas/rswitch_l2.c:268:7: warning: variable 'err' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized] 268 | case SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED: | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/renesas/rswitch_l2.c:275:6: note: uninitialized use occurs here 275 | if (err < 0) | ^~~ drivers/net/ethernet/renesas/rswitch_l2.c:264:7: warning: variable 'err' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized] 264 | case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/renesas/rswitch_l2.c:275:6: note: uninitialized use occurs here 275 | if (err < 0) | ^~~ drivers/net/ethernet/renesas/rswitch_l2.c:251:9: note: initialize the variable 'err' to silence this warning 251 | int err; | ^ | = 0 2 warnings generated. vim +/err +268 drivers/net/ethernet/renesas/rswitch_l2.c 244 245 static int rswitch_handle_port_attr_set(struct net_device *ndev, 246 struct notifier_block *nb, 247 struct switchdev_notifier_port_attr_info *info) 248 { 249 const struct switchdev_attr *attr = info->attr; 250 struct rswitch_private *priv; 251 int err; 252 253 priv = container_of(nb, struct rswitch_private, rswitch_switchdev_blocking_nb); 254 255 switch (attr->id) { 256 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 257 err = rswitch_port_update_stp_state(ndev, attr->u.stp_state); 258 259 break; 260 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 261 err = rswitch_update_ageing_time(priv, attr->u.ageing_time); 262 263 break; 264 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 265 rswitch_update_vlan_filtering(priv, attr->u.vlan_filtering); 266 267 break; > 268 case SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED: 269 270 break; 271 default: 272 return -EOPNOTSUPP; 273 } 274 275 if (err < 0) 276 return err; 277 278 info->handled = true; 279 280 return NOTIFY_DONE; 281 } 282 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki