Re: [PATCH] wifi: mt76: add tx checksum offload for mt7915, mt7921, mt7981 and mt7986

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

Hi Aleksander,

kernel test robot noticed the following build warnings:

[auto build test WARNING on wireless-next/main]
[also build test WARNING on wireless/main linus/master v6.18-rc2 next-20251017]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Aleksander-Jan-Bajkowski/wifi-mt76-add-tx-checksum-offload-for-mt7915-mt7921-mt7981-and-mt7986/20251019-235515
base:   https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git main
patch link:    https://lore.kernel.org/r/20251019155316.3537185-1-olek2%40wp.pl
patch subject: [PATCH] wifi: mt76: add tx checksum offload for mt7915, mt7921, mt7981 and mt7986
config: loongarch-allyesconfig (https://download.01.org/0day-ci/archive/20251020/202510201250.Hpsrohca-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 754ebc6ebb9fb9fbee7aef33478c74ea74949853)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251020/202510201250.Hpsrohca-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/202510201250.Hpsrohca-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/net/wireless/mediatek/mt76/mt792x_core.c:636:19: warning: expression result unused [-Wunused-value]
     636 |                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
         |                 ~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +636 drivers/net/wireless/mediatek/mt76/mt792x_core.c

   618	
   619	int mt792x_init_wiphy(struct ieee80211_hw *hw)
   620	{
   621		struct mt792x_phy *phy = mt792x_hw_phy(hw);
   622		struct mt792x_dev *dev = phy->dev;
   623		struct wiphy *wiphy = hw->wiphy;
   624	
   625		hw->queues = 4;
   626		if (dev->has_eht) {
   627			hw->max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_EHT;
   628			hw->max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_EHT;
   629		} else {
   630			hw->max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HE;
   631			hw->max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HE;
   632		}
   633		hw->netdev_features = NETIF_F_RXCSUM;
   634	
   635		if (is_mt7921(&dev->mt76))
 > 636			NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
   637	
   638		hw->radiotap_timestamp.units_pos =
   639			IEEE80211_RADIOTAP_TIMESTAMP_UNIT_US;
   640	
   641		phy->slottime = 9;
   642	
   643		hw->sta_data_size = sizeof(struct mt792x_sta);
   644		hw->vif_data_size = sizeof(struct mt792x_vif);
   645		hw->chanctx_data_size = sizeof(struct mt792x_chanctx);
   646	
   647		if (dev->fw_features & MT792x_FW_CAP_CNM) {
   648			wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
   649			wiphy->iface_combinations = if_comb_chanctx;
   650			wiphy->n_iface_combinations = ARRAY_SIZE(if_comb_chanctx);
   651		} else {
   652			wiphy->flags &= ~WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
   653			wiphy->iface_combinations = if_comb;
   654			wiphy->n_iface_combinations = ARRAY_SIZE(if_comb);
   655		}
   656		wiphy->flags &= ~(WIPHY_FLAG_IBSS_RSN | WIPHY_FLAG_4ADDR_AP |
   657				  WIPHY_FLAG_4ADDR_STATION);
   658		wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
   659					 BIT(NL80211_IFTYPE_AP) |
   660					 BIT(NL80211_IFTYPE_P2P_CLIENT) |
   661					 BIT(NL80211_IFTYPE_P2P_GO) |
   662					 BIT(NL80211_IFTYPE_P2P_DEVICE);
   663		wiphy->max_remain_on_channel_duration = 5000;
   664		wiphy->max_scan_ie_len = MT76_CONNAC_SCAN_IE_LEN;
   665		wiphy->max_scan_ssids = 4;
   666		wiphy->max_sched_scan_plan_interval =
   667			MT76_CONNAC_MAX_TIME_SCHED_SCAN_INTERVAL;
   668		wiphy->max_sched_scan_ie_len = IEEE80211_MAX_DATA_LEN;
   669		wiphy->max_sched_scan_ssids = MT76_CONNAC_MAX_SCHED_SCAN_SSID;
   670		wiphy->max_match_sets = MT76_CONNAC_MAX_SCAN_MATCH;
   671		wiphy->max_sched_scan_reqs = 1;
   672		wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH |
   673				WIPHY_FLAG_SPLIT_SCAN_6GHZ;
   674	
   675		wiphy->features |= NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
   676				   NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
   677		wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_SET_SCAN_DWELL);
   678		wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_BEACON_RATE_LEGACY);
   679		wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_BEACON_RATE_HT);
   680		wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_BEACON_RATE_VHT);
   681		wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_BEACON_RATE_HE);
   682		wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_ACK_SIGNAL_SUPPORT);
   683		wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
   684	
   685		ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
   686		ieee80211_hw_set(hw, HAS_RATE_CONTROL);
   687		ieee80211_hw_set(hw, SUPPORTS_TX_ENCAP_OFFLOAD);
   688		ieee80211_hw_set(hw, SUPPORTS_RX_DECAP_OFFLOAD);
   689		ieee80211_hw_set(hw, WANT_MONITOR_VIF);
   690		ieee80211_hw_set(hw, SUPPORTS_PS);
   691		ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
   692		ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
   693		ieee80211_hw_set(hw, CONNECTION_MONITOR);
   694		ieee80211_hw_set(hw, NO_VIRTUAL_MONITOR);
   695		ieee80211_hw_set(hw, SUPPORTS_MULTI_BSSID);
   696		ieee80211_hw_set(hw, SUPPORTS_ONLY_HE_MULTI_BSSID);
   697	
   698		if (is_mt7921(&dev->mt76)) {
   699			ieee80211_hw_set(hw, CHANCTX_STA_CSA);
   700		}
   701	
   702		if (dev->pm.enable)
   703			ieee80211_hw_set(hw, CONNECTION_MONITOR);
   704	
   705		hw->max_tx_fragments = 4;
   706	
   707		return 0;
   708	}
   709	EXPORT_SYMBOL_GPL(mt792x_init_wiphy);
   710	

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https://github.com/intel/lkp-tests/wiki