* Re: [PATCH net-next 13/13] net: renesas: rswitch: add vlan aware switching
[not found] <20260317-rswitch_add_vlans-v1-13-3a57bfa0f2d1@renesas.com>
@ 2026-03-19 1:29 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-03-19 1:29 UTC (permalink / raw)
To: Michael Dege, Yoshihiro Shimoda, Andrew Lunn, David S. Miller,
Eric Dumazet, Jakub Kicinski, Paolo Abeni
Cc: llvm, oe-kbuild-all, netdev, linux-renesas-soc, linux-kernel,
Michael Dege
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 <lkp@intel.com>
| 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
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