[gustavoars-linux:testing/fam1 1/1] drivers/net/ethernet/qlogic/qed/qed_ll2.c:1228:14: error: invalid application of 'sizeof' to incomplete type 'struct <anonymous>[]'

[gustavoars-linux:testing/fam1 1/1] drivers/net/ethernet/qlogic/qed/qed_ll2.c:1228:14: error: invalid application of 'sizeof' to incomplete type 'struct <anonymous>[]'

[kbuild test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git testing/fam1
head:   30309535b17df9a28c626c44727821be46707e8a
commit: 30309535b17df9a28c626c44727821be46707e8a [1/1] treewide: Replace one-element array with flexible-array
config: s390-allyesconfig (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 30309535b17df9a28c626c44727821be46707e8a
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=s390 

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

All errors (new ones prefixed by >>):

   drivers/net/ethernet/qlogic/qed/qed_ll2.c: In function 'qed_ll2_acquire_connection_tx':
>> drivers/net/ethernet/qlogic/qed/qed_ll2.c:1228:14: error: invalid application of 'sizeof' to incomplete type 'struct <anonymous>[]'
    1228 |        sizeof(p_descq->bds_set));
         |              ^
   drivers/net/ethernet/qlogic/qed/qed_ll2.c: In function 'qed_ll2_establish_connection':
   drivers/net/ethernet/qlogic/qed/qed_ll2.c:1588:14: error: invalid application of 'sizeof' to incomplete type 'struct <anonymous>[]'
    1588 |        sizeof(p_pkt->bds_set));
         |              ^

vim +1228 drivers/net/ethernet/qlogic/qed/qed_ll2.c

0a7fb11c23c0fb Yuval Mintz     2016-10-01  1202  
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1203  static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
13c547717231aa Mintz, Yuval    2017-06-09  1204  					 struct qed_ll2_info *p_ll2_info)
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1205  {
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1206  	struct qed_ll2_tx_packet *p_descq;
f5823fe6897c44 Michal Kalderon 2017-10-09  1207  	u32 desc_size;
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1208  	u32 capacity;
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1209  	int rc = 0;
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1210  
13c547717231aa Mintz, Yuval    2017-06-09  1211  	if (!p_ll2_info->input.tx_num_desc)
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1212  		goto out;
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1213  
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1214  	rc = qed_chain_alloc(p_hwfn->cdev,
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1215  			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1216  			     QED_CHAIN_MODE_PBL,
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1217  			     QED_CHAIN_CNT_TYPE_U16,
13c547717231aa Mintz, Yuval    2017-06-09  1218  			     p_ll2_info->input.tx_num_desc,
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1219  			     sizeof(struct core_tx_bd),
1a4a69751f4d24 Mintz, Yuval    2017-06-20  1220  			     &p_ll2_info->tx_queue.txq_chain, NULL);
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1221  	if (rc)
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1222  		goto out;
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1223  
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1224  	capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
f5823fe6897c44 Michal Kalderon 2017-10-09  1225  	/* First element is part of the packet, rest are flexibly added */
f5823fe6897c44 Michal Kalderon 2017-10-09  1226  	desc_size = (sizeof(*p_descq) +
f5823fe6897c44 Michal Kalderon 2017-10-09  1227  		     (p_ll2_info->input.tx_max_bds_per_packet - 1) *
f5823fe6897c44 Michal Kalderon 2017-10-09 @1228  		     sizeof(p_descq->bds_set));
f5823fe6897c44 Michal Kalderon 2017-10-09  1229  
f5823fe6897c44 Michal Kalderon 2017-10-09  1230  	p_descq = kcalloc(capacity, desc_size, GFP_KERNEL);
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1231  	if (!p_descq) {
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1232  		rc = -ENOMEM;
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1233  		goto out;
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1234  	}
f5823fe6897c44 Michal Kalderon 2017-10-09  1235  	p_ll2_info->tx_queue.descq_mem = p_descq;
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1236  
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1237  	DP_VERBOSE(p_hwfn, QED_MSG_LL2,
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1238  		   "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
13c547717231aa Mintz, Yuval    2017-06-09  1239  		   p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc);
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1240  
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1241  out:
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1242  	if (rc)
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1243  		DP_NOTICE(p_hwfn,
0a7fb11c23c0fb Yuval Mintz     2016-10-01  1244  			  "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
13c547717231aa Mintz, Yuval    2017-06-09  1245  			  p_ll2_info->input.tx_num_desc);
13c547717231aa Mintz, Yuval    2017-06-09  1246  	return rc;
13c547717231aa Mintz, Yuval    2017-06-09  1247  }
13c547717231aa Mintz, Yuval    2017-06-09  1248  

:::::: The code at line 1228 was first introduced by commit
:::::: f5823fe6897c444265ef3919d8684b647eef904f qed: Add ll2 option to limit the number of bds per packet

:::::: TO: Michal Kalderon <Michal.Kalderon@cavium.com>
:::::: CC: David S. Miller <davem@davemloft.net>

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

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