linux-kernel - [jpirko-mlxsw:ubridge 73/78] drivers/net/ethernet/mellanox/mlxsw/spectrum_fid.c:461:12: warning: stack frame size (1092) exceeds limit (1024) in 'mlxsw_sp_fid_erif_eport_to_vid

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Date:   Thu, 20 Jan 2022 11:27:58 +0800
From:   kernel test robot <lkp@...el.com>
To:     Amit Cohen <amcohen@...dia.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Ido Schimmel <idosch@...dia.com>
Subject: [jpirko-mlxsw:ubridge 73/78]
 drivers/net/ethernet/mellanox/mlxsw/spectrum_fid.c:461:12: warning: stack
 frame size (1092) exceeds limit (1024) in
 'mlxsw_sp_fid_erif_eport_to_vid_map'

tree:   https://github.com/jpirko/linux_mlxsw ubridge
head:   976afb368c2f7efc2dc2436013895cc96ab06774
commit: 6e0855a9b3824d98f266ac39a1a19c7bce925cd2 [73/78] mlxsw: spectrum_fid: Configure layer 3 egress VID classification
config: i386-allmodconfig (https://download.01.org/0day-ci/archive/20220120/202201201030.HA2UgQTx-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project f7b7138a62648f4019c55e4671682af1f851f295)
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://github.com/jpirko/linux_mlxsw/commit/6e0855a9b3824d98f266ac39a1a19c7bce925cd2
        git remote add jpirko-mlxsw https://github.com/jpirko/linux_mlxsw
        git fetch --no-tags jpirko-mlxsw ubridge
        git checkout 6e0855a9b3824d98f266ac39a1a19c7bce925cd2
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/net/ethernet/mellanox/mlxsw/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/net/ethernet/mellanox/mlxsw/spectrum_fid.c:461:12: warning: stack frame size (1092) exceeds limit (1024) in 'mlxsw_sp_fid_erif_eport_to_vid_map' [-Wframe-larger-than]
   static int mlxsw_sp_fid_erif_eport_to_vid_map(struct mlxsw_sp_fid *fid,
              ^
>> drivers/net/ethernet/mellanox/mlxsw/spectrum_fid.c:689:12: warning: stack frame size (1116) exceeds limit (1024) in '__mlxsw_sp_fid_port_vid_map' [-Wframe-larger-than]
   static int __mlxsw_sp_fid_port_vid_map(const struct mlxsw_sp_fid *fid,
              ^
   2 warnings generated.


vim +/mlxsw_sp_fid_erif_eport_to_vid_map +461 drivers/net/ethernet/mellanox/mlxsw/spectrum_fid.c

   460	
 > 461	static int mlxsw_sp_fid_erif_eport_to_vid_map(struct mlxsw_sp_fid *fid,
   462						      u16 rif_index, bool valid)
   463	{
   464		struct mlxsw_sp *mlxsw_sp = fid->fid_family->mlxsw_sp;
   465		struct mlxsw_sp_fid_port_vid *port_vid, *tmp;
   466		char reiv_pl[MLXSW_REG_REIV_LEN] = {};
   467		bool records_to_write = false;
   468		u8 rec_num, current_page = 0;
   469		u16 last_local_port;
   470		int err;
   471	
   472		mlxsw_reg_reiv_pack(reiv_pl, current_page, rif_index);
   473		last_local_port = current_page * MLXSW_REG_REIV_REC_MAX_COUNT +
   474				  MLXSW_REG_REIV_REC_MAX_COUNT - 1;
   475	
   476		list_for_each_entry_safe(port_vid, tmp, &fid->port_vid_list, list) {
   477			/* The list is sorted by local_port. */
   478			if (port_vid->local_port > last_local_port)
   479				goto reg_write;
   480	
   481	new_record_fill:
   482			rec_num = port_vid->local_port % MLXSW_REG_REIV_REC_MAX_COUNT;
   483			mlxsw_reg_reiv_rec_update_set(reiv_pl, rec_num, true);
   484			mlxsw_reg_reiv_rec_evid_set(reiv_pl, rec_num,
   485						    valid ? port_vid->vid : 0);
   486			records_to_write = true;
   487			goto next_list_node;
   488	
   489	reg_write:
   490		err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(reiv), reiv_pl);
   491		if (err)
   492			return err;
   493	
   494		records_to_write = false;
   495		current_page++;
   496		memset(reiv_pl, 0, MLXSW_REG_REIV_LEN);
   497		mlxsw_reg_reiv_pack(reiv_pl, current_page, rif_index);
   498		last_local_port = current_page * MLXSW_REG_REIV_REC_MAX_COUNT +
   499				  MLXSW_REG_REIV_REC_MAX_COUNT - 1;
   500		goto new_record_fill;
   501	
   502	next_list_node:
   503			continue;
   504		}
   505	
   506		if (records_to_write)
   507			return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(reiv),
   508					       reiv_pl);
   509		return 0;
   510	}
   511	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org