[PATCH net-next] net: ethernet: mtk_eth_soc: support per-flow accounting on MT7988

[kernel test robot]

Hi Daniel,

kernel test robot noticed the following build errors:

[auto build test ERROR on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Daniel-Golle/net-ethernet-mtk_eth_soc-support-per-flow-accounting-on-MT7988/20230729-215634
base:   net-next/main
patch link:    https://lore.kernel.org/r/801c89963e95e5ce8f1ab7dbda894dd9da0125cc.1690638748.git.daniel%40makrotopia.org
patch subject: [PATCH net-next] net: ethernet: mtk_eth_soc: support per-flow accounting on MT7988
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20230730/202307300133.j8MIsDCa-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20230730/202307300133.j8MIsDCa-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307300133.j8MIsDCa-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/net/ethernet/mediatek/mtk_ppe.c: In function 'mtk_mib_entry_read':
>> drivers/net/ethernet/mediatek/mtk_ppe.c:112:17: error: 'bytes_cnt_low' undeclared (first use in this function); did you mean 'byte_cnt_low'?
     112 |                 bytes_cnt_low = cnt_r0;
         |                 ^~~~~~~~~~~~~
         |                 byte_cnt_low
   drivers/net/ethernet/mediatek/mtk_ppe.c:112:17: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/net/ethernet/mediatek/mtk_ppe.c:113:17: error: 'bytes_cnt_high' undeclared (first use in this function); did you mean 'byte_cnt_high'?
     113 |                 bytes_cnt_high = cnt_r1;
         |                 ^~~~~~~~~~~~~~
         |                 byte_cnt_high


vim +112 drivers/net/ethernet/mediatek/mtk_ppe.c

    92	
    93	static int mtk_mib_entry_read(struct mtk_ppe *ppe, u16 index, u64 *bytes, u64 *packets)
    94	{
    95		u32 byte_cnt_low, byte_cnt_high, pkt_cnt_low, pkt_cnt_high;
    96		u32 val, cnt_r0, cnt_r1, cnt_r2;
    97		int ret;
    98	
    99		val = FIELD_PREP(MTK_PPE_MIB_SER_CR_ADDR, index) | MTK_PPE_MIB_SER_CR_ST;
   100		ppe_w32(ppe, MTK_PPE_MIB_SER_CR, val);
   101	
   102		ret = mtk_ppe_mib_wait_busy(ppe);
   103		if (ret)
   104			return ret;
   105	
   106		cnt_r0 = readl(ppe->base + MTK_PPE_MIB_SER_R0);
   107		cnt_r1 = readl(ppe->base + MTK_PPE_MIB_SER_R1);
   108		cnt_r2 = readl(ppe->base + MTK_PPE_MIB_SER_R2);
   109	
   110		if (mtk_is_netsys_v3_or_greater(ppe->eth)) {
   111			/* 64 bit for each counter */
 > 112			bytes_cnt_low = cnt_r0;
 > 113			bytes_cnt_high = cnt_r1;
   114			pkt_cnt_low = cnt_r2;
   115			pkt_cnt_high = readl(ppe->base + MTK_PPE_MIB_SER_R3);
   116		} else {
   117			/* 48 bit for each counter */
   118			byte_cnt_low = FIELD_GET(MTK_PPE_MIB_SER_R0_BYTE_CNT_LOW, cnt_r0);
   119			byte_cnt_high = FIELD_GET(MTK_PPE_MIB_SER_R1_BYTE_CNT_HIGH, cnt_r1);
   120			pkt_cnt_low = FIELD_GET(MTK_PPE_MIB_SER_R1_PKT_CNT_LOW, cnt_r1);
   121			pkt_cnt_high = FIELD_GET(MTK_PPE_MIB_SER_R2_PKT_CNT_HIGH, cnt_r2);
   122		}
   123	
   124		*bytes = ((u64)byte_cnt_high << 32) | byte_cnt_low;
   125		*packets = (pkt_cnt_high << 16) | pkt_cnt_low;
   126	
   127		return 0;
   128	}
   129	

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