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Re: [PATCH] mac80211: fix throughput LED trigger

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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-throughput-LED-trigger/20211112-185656
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/e7c97026e87b3302843d614f414335befbeab31e
        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@xxxxxxxxx>

All warnings (new ones prefixed by >>):

   net/mac80211/tx.c: In function '__ieee80211_tx':
>> net/mac80211/tx.c:1732:9: warning: variable 'fc' set but not used [-Wunused-but-set-variable]
    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@xxxxxxxxxxxx

Attachment: .config.gz
Description: application/gzip


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