Re: [PATCH 3/3] net: j2: Introduce J-Core EMAC

[kernel test robot <lkp@intel.com>]

Hi Artur,

kernel test robot noticed the following build warnings:

[auto build test WARNING on robh/for-next]
[also build test WARNING on linus/master v6.17-rc1 next-20250815]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Artur-Rojek/dt-bindings-vendor-prefixes-Document-J-Core/20250816-042354
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20250815194806.1202589-4-contact%40artur-rojek.eu
patch subject: [PATCH 3/3] net: j2: Introduce J-Core EMAC
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20250816/202508161930.ergOga3z-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250816/202508161930.ergOga3z-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/202508161930.ergOga3z-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/net/ethernet/jcore_emac.c:231:2: warning: label at end of compound statement is a C2x extension [-Wc2x-extensions]
     231 |         }
         |         ^
   1 warning generated.


vim +231 drivers/net/ethernet/jcore_emac.c

   192	
   193	static void jcore_emac_set_rx_mode(struct net_device *ndev)
   194	{
   195		struct jcore_emac *priv = netdev_priv(ndev);
   196		struct netdev_hw_addr *ha;
   197		unsigned int reg, i, idx = 0, set_mask = 0, clear_mask = 0, addr = 0;
   198	
   199		if (ndev->flags & IFF_PROMISC)
   200			set_mask |= JCORE_EMAC_PROMISC;
   201		else
   202			clear_mask |= JCORE_EMAC_PROMISC;
   203	
   204		if (ndev->flags & IFF_ALLMULTI)
   205			set_mask |= JCORE_EMAC_MCAST;
   206		else
   207			clear_mask |= JCORE_EMAC_MCAST;
   208	
   209		regmap_update_bits(priv->map, JCORE_EMAC_CONTROL, set_mask | clear_mask,
   210				   set_mask);
   211	
   212		if (!(ndev->flags & IFF_MULTICAST))
   213			return;
   214	
   215		netdev_for_each_mc_addr(ha, ndev) {
   216			/* Only the first 3 octets are used in a hardware mcast mask. */
   217			memcpy(&addr, ha->addr, 3);
   218	
   219			for (i = 0; i < idx; i++) {
   220				regmap_read(priv->map, JCORE_EMAC_MCAST_MASK(i), &reg);
   221				if (reg == addr)
   222					goto next_ha;
   223			}
   224	
   225			regmap_write(priv->map, JCORE_EMAC_MCAST_MASK(idx), addr);
   226			if (++idx >= JCORE_EMAC_MCAST_ADDRS) {
   227				netdev_warn(ndev, "Multicast list limit reached\n");
   228				break;
   229			}
   230	next_ha:
 > 231		}
   232	
   233		/* Clear the remaining mask entries. */
   234		for (i = idx; i < JCORE_EMAC_MCAST_ADDRS; i++)
   235			regmap_write(priv->map, JCORE_EMAC_MCAST_MASK(i), 0);
   236	}
   237	

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