Re: [PATCH wireless-next v3 15/21] wifi: mac80211: filter uplink and downlink frames based on SMD states

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

Hi Pooventhiran,

kernel test robot noticed the following build warnings:

[auto build test WARNING on b8e5b0ae8ff47240366d38e5d12c65f878724316]

url:    https://github.com/intel-lab-lkp/linux/commits/Pooventhiran-G/wifi-nl80211-define-Seamless-Mobility-Domain-SMD-device-capability/20261106-010836
base:   b8e5b0ae8ff47240366d38e5d12c65f878724316
patch link:    https://lore.kernel.org/r/20261106-smd-v3-15-1723950e3cf8%40oss.qualcomm.com
patch subject: [PATCH wireless-next v3 15/21] wifi: mac80211: filter uplink and downlink frames based on SMD states
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20261106/202611061037.MK46LPkJ-lkp@intel.com/config)
compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261106/202611061037.MK46LPkJ-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/202611061037.MK46LPkJ-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> net/mac80211/tx.c:318:48: warning: overlapping comparisons always evaluate to true [-Wtautological-overlap-compare]
     318 |             (tx->sdata->vif.type != NL80211_IFTYPE_AP ||
         |              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
     319 |              tx->sdata->vif.type != NL80211_IFTYPE_AP_VLAN) ||
         |              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +318 net/mac80211/tx.c

   310	
   311	static ieee80211_tx_result debug_noinline
   312	ieee80211_tx_h_smd_state(struct ieee80211_tx_data *tx)
   313	{
   314		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
   315		__le16 fc = hdr->frame_control;
   316	
   317		if (!tx->sta ||
 > 318		    (tx->sdata->vif.type != NL80211_IFTYPE_AP ||
   319		     tx->sdata->vif.type != NL80211_IFTYPE_AP_VLAN) ||
   320		    !test_sta_flag(tx->sta, WLAN_STA_ASSOC) ||
   321		    !(tx->flags & IEEE80211_TX_UNICAST))
   322			return TX_CONTINUE;
   323	
   324		switch (tx->sta->smd_state) {
   325		case IEEE80211_STA_SMD_NONE:
   326			break;
   327		case IEEE80211_STA_SMD_PREP:
   328			/* 4a: Class 3 disallowed except ST Execution Response */
   329			if (ieee80211_is_st_exec_resp(tx->skb))
   330				break;
   331			if (ieee80211_is_class3(tx->skb))
   332				return TX_DROP;
   333			break;
   334		case IEEE80211_STA_SMD_EXEC:
   335			/* 4b: no restriction */
   336			break;
   337		case IEEE80211_STA_SMD_DRAIN:
   338			/* 4c: Class 3 disallowed except Data, Control,
   339			 * UHR Reconfiguration Notify
   340			 */
   341			if (ieee80211_is_ctl(fc) || ieee80211_is_data(fc) ||
   342			    ieee80211_is_uhr_link_reconf_notify(tx->skb))
   343				break;
   344			if (ieee80211_is_class3(tx->skb))
   345				return TX_DROP;
   346			break;
   347		}
   348	
   349		return TX_CONTINUE;
   350	}
   351	

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki