netdev - Re: [PATCH net-next 05/13] net: stmmac: selftests: Add selftest for L3/L4 Filters

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Date:   Mon, 2 Sep 2019 18:35:01 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Jose Abreu <Jose.Abreu@...opsys.com>
Cc:     kbuild-all@...org, netdev@...r.kernel.org,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        Jose Abreu <Jose.Abreu@...opsys.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        "David S. Miller" <davem@...emloft.net>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 05/13] net: stmmac: selftests: Add selftest for
 L3/L4 Filters

Hi Jose,

I love your patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Jose-Abreu/net-stmmac-Improvements-for-next/20190902-160927
config: mips-allmodconfig (attached as .config)
compiler: mips-linux-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=mips 

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

All warnings (new ones prefixed by >>):

   drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c: In function '__stmmac_test_l3filt':
>> drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c:1249:1: warning: the frame size of 1280 bytes is larger than 1024 bytes [-Wframe-larger-than=]
    }
    ^
   drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c: In function '__stmmac_test_l4filt':
   drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c:1362:1: warning: the frame size of 1280 bytes is larger than 1024 bytes [-Wframe-larger-than=]
    }
    ^

vim +1249 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c

  1170	
  1171	#ifdef CONFIG_NET_CLS_ACT
  1172	static int __stmmac_test_l3filt(struct stmmac_priv *priv, u32 dst, u32 src,
  1173					u32 dst_mask, u32 src_mask)
  1174	{
  1175		struct flow_dissector_key_ipv4_addrs key, mask;
  1176		unsigned long dummy_cookie = 0xdeadbeef;
  1177		struct flow_dissector dissector = { };
  1178		struct stmmac_packet_attrs attr = { };
  1179		struct flow_cls_offload cls = { };
  1180		struct flow_rule *rule;
  1181		int ret;
  1182	
  1183		if (!tc_can_offload(priv->dev))
  1184			return -EOPNOTSUPP;
  1185		if (!priv->dma_cap.l3l4fnum)
  1186			return -EOPNOTSUPP;
  1187		if (priv->rss.enable) {
  1188			struct stmmac_rss rss = { .enable = false, };
  1189	
  1190			stmmac_rss_configure(priv, priv->hw, &rss,
  1191					     priv->plat->rx_queues_to_use);
  1192		}
  1193	
  1194		dissector.used_keys |= (1 << FLOW_DISSECTOR_KEY_IPV4_ADDRS);
  1195		dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] = 0;
  1196	
  1197		cls.common.chain_index = 0;
  1198		cls.command = FLOW_CLS_REPLACE;
  1199		cls.cookie = dummy_cookie;
  1200	
  1201		rule = kzalloc(struct_size(rule, action.entries, 1), GFP_KERNEL);
  1202		if (!rule) {
  1203			ret = -ENOMEM;
  1204			goto cleanup_rss;
  1205		}
  1206	
  1207		rule->match.dissector = &dissector;
  1208		rule->match.key = (void *)&key;
  1209		rule->match.mask = (void *)&mask;
  1210	
  1211		key.src = htonl(src);
  1212		key.dst = htonl(dst);
  1213		mask.src = src_mask;
  1214		mask.dst = dst_mask;
  1215	
  1216		cls.rule = rule;
  1217	
  1218		rule->action.entries[0].id = FLOW_ACTION_DROP;
  1219		rule->action.num_entries = 1;
  1220	
  1221		attr.dst = priv->dev->dev_addr;
  1222		attr.ip_dst = dst;
  1223		attr.ip_src = src;
  1224	
  1225		/* Shall receive packet */
  1226		ret = __stmmac_test_loopback(priv, &attr);
  1227		if (ret)
  1228			goto cleanup_rule;
  1229	
  1230		ret = stmmac_tc_setup_cls(priv, priv, &cls);
  1231		if (ret)
  1232			goto cleanup_rule;
  1233	
  1234		/* Shall NOT receive packet */
  1235		ret = __stmmac_test_loopback(priv, &attr);
  1236		ret = ret ? 0 : -EINVAL;
  1237	
  1238		cls.command = FLOW_CLS_DESTROY;
  1239		stmmac_tc_setup_cls(priv, priv, &cls);
  1240	cleanup_rule:
  1241		kfree(rule);
  1242	cleanup_rss:
  1243		if (priv->rss.enable) {
  1244			stmmac_rss_configure(priv, priv->hw, &priv->rss,
  1245					     priv->plat->rx_queues_to_use);
  1246		}
  1247	
  1248		return ret;
> 1249	}
  1250	#else
  1251	static int __stmmac_test_l3filt(struct stmmac_priv *priv, u32 dst, u32 src,
  1252					u32 dst_mask, u32 src_mask)
  1253	{
  1254		return -EOPNOTSUPP;
  1255	}
  1256	#endif
  1257	

---
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