tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   ec2618180c3450d06a6a4ba951d4c9a2c689b517
commit: a1166b2653db2f3de7338b9fb8a0f6e924b904ee [2265/2770] ath10k: add CCMP PN replay protection for fragmented frames for PCIe
config: h8300-randconfig-r035-20210513 (attached as .config)
compiler: h8300-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=a1166b2653db2f3de7338b9fb8a0f6e924b904ee
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout a1166b2653db2f3de7338b9fb8a0f6e924b904ee
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=h8300 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/net/wireless/ath/ath10k/htt_rx.c: In function 'ath10k_htt_rx_h_frag_pn_check':
>> drivers/net/wireless/ath/ath10k/htt_rx.c:1780:7: warning: variable 'more_frags' set but not used [-Wunused-but-set-variable]
    1780 |  bool more_frags;
         |       ^~~~~~~~~~


vim +/more_frags +1780 drivers/net/wireless/ath/ath10k/htt_rx.c

  1770	
  1771	static bool ath10k_htt_rx_h_frag_pn_check(struct ath10k *ar,
  1772						  struct sk_buff *skb,
  1773						  u16 peer_id,
  1774						  u16 offset,
  1775						  enum htt_rx_mpdu_encrypt_type enctype)
  1776	{
  1777		struct ath10k_peer *peer;
  1778		union htt_rx_pn_t *last_pn, new_pn = {0};
  1779		struct ieee80211_hdr *hdr;
> 1780		bool more_frags;
  1781		u8 tid, frag_number;
  1782		u32 seq;
  1783	
  1784		peer = ath10k_peer_find_by_id(ar, peer_id);
  1785		if (!peer) {
  1786			ath10k_dbg(ar, ATH10K_DBG_HTT, "invalid peer for frag pn check\n");
  1787			return false;
  1788		}
  1789	
  1790		hdr = (struct ieee80211_hdr *)(skb->data + offset);
  1791		if (ieee80211_is_data_qos(hdr->frame_control))
  1792			tid = ieee80211_get_tid(hdr);
  1793		else
  1794			tid = ATH10K_TXRX_NON_QOS_TID;
  1795	
  1796		last_pn = &peer->frag_tids_last_pn[tid];
  1797		new_pn.pn48 = ath10k_htt_rx_h_get_pn(ar, skb, offset, enctype);
  1798		more_frags = ieee80211_has_morefrags(hdr->frame_control);
  1799		frag_number = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
  1800		seq = (__le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4;
  1801	
  1802		if (frag_number == 0) {
  1803			last_pn->pn48 = new_pn.pn48;
  1804			peer->frag_tids_seq[tid] = seq;
  1805		} else {
  1806			if (seq != peer->frag_tids_seq[tid])
  1807				return false;
  1808	
  1809			if (new_pn.pn48 != last_pn->pn48 + 1)
  1810				return false;
  1811	
  1812			last_pn->pn48 = new_pn.pn48;
  1813		}
  1814	
  1815		return true;
  1816	}
  1817	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org