Hi Felix, I love your patch! Perhaps something to improve: [auto build test WARNING on jberg-mac80211-next/master] [also build test WARNING on v5.15 next-20211112] [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] url: https://github.com/0day-ci/linux/commits/Felix-Fietkau/mac80211-fix-throu... base: https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git master config: i386-defconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/e7c97026e87b3302843d614f414335bef... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Felix-Fietkau/mac80211-fix-throughput-LED-trigger/20211112-185656 git checkout e7c97026e87b3302843d614f414335befbeab31e # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): net/mac80211/tx.c: In function '__ieee80211_tx': 1732 | __le16 fc; | ^~ vim +/fc +1732 net/mac80211/tx.c 11127e9121d4dd Johannes Berg 2011-11-16 1719 11127e9121d4dd Johannes Berg 2011-11-16 1720 /* 11127e9121d4dd Johannes Berg 2011-11-16 1721 * Returns false if the frame couldn't be transmitted but was queued instead. 11127e9121d4dd Johannes Berg 2011-11-16 1722 */ 11127e9121d4dd Johannes Berg 2011-11-16 1723 static bool __ieee80211_tx(struct ieee80211_local *local, e7c97026e87b33 Felix Fietkau 2021-11-12 1724 struct sk_buff_head *skbs, struct sta_info *sta, e7c97026e87b33 Felix Fietkau 2021-11-12 1725 bool txpending) 11127e9121d4dd Johannes Berg 2011-11-16 1726 { 11127e9121d4dd Johannes Berg 2011-11-16 1727 struct ieee80211_tx_info *info; 11127e9121d4dd Johannes Berg 2011-11-16 1728 struct ieee80211_sub_if_data *sdata; 11127e9121d4dd Johannes Berg 2011-11-16 1729 struct ieee80211_vif *vif; 11127e9121d4dd Johannes Berg 2011-11-16 1730 struct sk_buff *skb; 958574cbcc3ae3 Colin Ian King 2021-03-28 1731 bool result; 11127e9121d4dd Johannes Berg 2011-11-16 @1732 __le16 fc; 11127e9121d4dd Johannes Berg 2011-11-16 1733 11127e9121d4dd Johannes Berg 2011-11-16 1734 if (WARN_ON(skb_queue_empty(skbs))) 11127e9121d4dd Johannes Berg 2011-11-16 1735 return true; 11127e9121d4dd Johannes Berg 2011-11-16 1736 11127e9121d4dd Johannes Berg 2011-11-16 1737 skb = skb_peek(skbs); 11127e9121d4dd Johannes Berg 2011-11-16 1738 fc = ((struct ieee80211_hdr *)skb->data)->frame_control; 11127e9121d4dd Johannes Berg 2011-11-16 1739 info = IEEE80211_SKB_CB(skb); 5061b0c2b9066d Johannes Berg 2009-07-14 1740 sdata = vif_to_sdata(info->control.vif); 11127e9121d4dd Johannes Berg 2011-11-16 1741 if (sta && !sta->uploaded) 11127e9121d4dd Johannes Berg 2011-11-16 1742 sta = NULL; 11127e9121d4dd Johannes Berg 2011-11-16 1743 5061b0c2b9066d Johannes Berg 2009-07-14 1744 switch (sdata->vif.type) { 5061b0c2b9066d Johannes Berg 2009-07-14 1745 case NL80211_IFTYPE_MONITOR: d82121845d4433 Aviya Erenfeld 2016-08-29 1746 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { c82b5a74cc7393 Johannes Berg 2013-07-14 1747 vif = &sdata->vif; c82b5a74cc7393 Johannes Berg 2013-07-14 1748 break; c82b5a74cc7393 Johannes Berg 2013-07-14 1749 } 4b6f1dd6a6faf4 Johannes Berg 2012-04-03 1750 sdata = rcu_dereference(local->monitor_sdata); 3a25a8c8b75b43 Johannes Berg 2012-04-03 1751 if (sdata) { 4b6f1dd6a6faf4 Johannes Berg 2012-04-03 1752 vif = &sdata->vif; 3a25a8c8b75b43 Johannes Berg 2012-04-03 1753 info->hw_queue = 3a25a8c8b75b43 Johannes Berg 2012-04-03 1754 vif->hw_queue[skb_get_queue_mapping(skb)]; 30686bf7f5b3c3 Johannes Berg 2015-06-02 1755 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { 63b4d8b3736b83 Johannes Berg 2015-11-24 1756 ieee80211_purge_tx_queue(&local->hw, skbs); 3a25a8c8b75b43 Johannes Berg 2012-04-03 1757 return true; 3a25a8c8b75b43 Johannes Berg 2012-04-03 1758 } else 11127e9121d4dd Johannes Berg 2011-11-16 1759 vif = NULL; 5061b0c2b9066d Johannes Berg 2009-07-14 1760 break; 5061b0c2b9066d Johannes Berg 2009-07-14 1761 case NL80211_IFTYPE_AP_VLAN: 11127e9121d4dd Johannes Berg 2011-11-16 1762 sdata = container_of(sdata->bss, 11127e9121d4dd Johannes Berg 2011-11-16 1763 struct ieee80211_sub_if_data, u.ap); fc0561dc6a9c61 Gustavo A. R. Silva 2020-07-07 1764 fallthrough; 5061b0c2b9066d Johannes Berg 2009-07-14 1765 default: 11127e9121d4dd Johannes Berg 2011-11-16 1766 vif = &sdata->vif; 5061b0c2b9066d Johannes Berg 2009-07-14 1767 break; 5061b0c2b9066d Johannes Berg 2009-07-14 1768 } 5061b0c2b9066d Johannes Berg 2009-07-14 1769 4fd0328d2f6314 Johannes Berg 2019-10-01 1770 result = ieee80211_tx_frags(local, vif, sta, skbs, txpending); 21f5fc75deca63 Luis R. Rodriguez 2009-07-24 1771 4db4e0a17fb0e7 Johannes Berg 2011-11-24 1772 WARN_ON_ONCE(!skb_queue_empty(skbs)); 252b86c43225d0 Johannes Berg 2011-11-16 1773 11127e9121d4dd Johannes Berg 2011-11-16 1774 return result; e2ebc74d7e3d71 Johannes Berg 2007-07-27 1775 } e2ebc74d7e3d71 Johannes Berg 2007-07-27 1776 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org