[anolis-intel-cloud:devel-5.10 1/1] drivers/net/ethernet/3snic/sssnic/nic/sss_nic_rx.c:718:13: error: variable '_wqe_num' set but not used

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

Hi Steven,

FYI, the error/warning still remains.

tree:   https://gitee.com/anolis/intel-cloud-kernel.git devel-5.10
head:   b17ac1b8b619f685007233e0a43f915bbd5d194c
commit: 3f63e55de387ff1ef9405747ecd67ea49dd18ed9 [1/1] Net: ethernet: Support 3snic 3s9xx network card
config: x86_64-anolis-intel-cloud-devel-5.10 (https://download.01.org/0day-ci/archive/20251125/202511252130.W71CwEGz-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.4.0-5) 12.4.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251125/202511252130.W71CwEGz-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/202511252130.W71CwEGz-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/net/ethernet/3snic/sssnic/nic/sss_nic_rx.c: In function 'sss_nic_recv_one_packet':
>> drivers/net/ethernet/3snic/sssnic/nic/sss_nic_rx.c:718:13: error: variable '_wqe_num' set but not used [-Werror=unused-but-set-variable]
     718 |         u16 _wqe_num = 1; \
         |             ^~~~~~~~
   drivers/net/ethernet/3snic/sssnic/nic/sss_nic_rx.c:805:9: note: in expansion of macro 'sss_nic_bpf_prog_run_xdp'
     805 |         sss_nic_bpf_prog_run_xdp(rq_desc, pkt_len, &xdp_result);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors


vim +/_wqe_num +718 drivers/net/ethernet/3snic/sssnic/nic/sss_nic_rx.c

   712	
   713	#define sss_nic_bpf_prog_run_xdp(rq_desc, pkt_size, result)	\
   714	do { \
   715		struct bpf_prog *xdp_prog = NULL; \
   716		struct sss_nic_rx_desc *rx_desc = NULL; \
   717		struct xdp_buff xdp; \
 > 718		u16 _wqe_num = 1; \
   719		u8 *_data = NULL; \
   720		u32 _ret; \
   721	\
   722		rcu_read_lock(); \
   723	\
   724		xdp_prog = READ_ONCE((rq_desc)->xdp_prog); \
   725		if (!xdp_prog) { \
   726			*(result) = SSSNIC_XDP_PKT_PASS; \
   727		} else if (unlikely((pkt_size) > (rq_desc)->buf_len)) { \
   728			SSSNIC_RQ_STATS_INC((rq_desc), large_xdp_pkts); \
   729			_wqe_num = (u16)((pkt_size) >> (rq_desc)->buff_size_shift) + \
   730				  (((pkt_size) & ((rq_desc)->buf_len - 1)) ? 1 : 0); \
   731			SSSNIC_RQ_STATS_INC((rq_desc), xdp_dropped); \
   732			sss_nic_xdp_update_rx_info((rq_desc), _wqe_num); \
   733			*(result) = SSSNIC_XDP_PKT_DROP; \
   734		} else { \
   735			rx_desc = &(rq_desc)->rx_desc_group[(rq_desc)->ci & (rq_desc)->qid_mask]; \
   736			_data = (u8 *)page_address(rx_desc->page) + rx_desc->page_offset; \
   737			prefetch(_data); \
   738			dma_sync_single_range_for_cpu((rq_desc)->dev, rx_desc->buf_daddr, \
   739						      rx_desc->page_offset, (rq_desc)->buf_len, \
   740						      DMA_FROM_DEVICE); \
   741			xdp.data = _data; \
   742			xdp.data_hard_start = xdp.data; \
   743			xdp.data_end = xdp.data + (pkt_size); \
   744			SSSNIC_SET_XDP_FRAME_SZ(&xdp, (rq_desc)->buf_len); \
   745			SSSNIC_XDP_SET_DATA_META_INVALID(&xdp); \
   746			prefetchw(xdp.data_hard_start); \
   747	\
   748			_ret = bpf_prog_run_xdp(xdp_prog, &xdp); \
   749			if (_ret == XDP_PASS) { \
   750				*(result) = SSSNIC_XDP_PKT_PASS; \
   751			} else { \
   752				*(result) = SSSNIC_XDP_PKT_DROP; \
   753				if (_ret != XDP_DROP) { \
   754					SSSNIC_BDF_WARN_INVALID_XDP_ACTION((rq_desc)->netdev, \
   755						xdp_prog, _ret); \
   756				} \
   757				SSSNIC_RQ_STATS_INC((rq_desc), xdp_dropped); \
   758				sss_nic_xdp_update_rx_info((rq_desc), _wqe_num); \
   759			} \
   760		} \
   761	\
   762		rcu_read_unlock(); \
   763	} while (0)
   764	#endif
   765	

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