This is a smatch thing.
net/mac80211/rc80211_minstrel_ht.c +639 minstrel_ht_update_caps(15)
warn: variable dereferenced before check 'sta'
631 struct ieee80211_mcs_info *mcs = &sta->ht_cap.mcs;
632 struct ieee80211_local *local = hw_to_local(mp->hw);
633 u16 sta_cap = sta->ht_cap.cap;
^^^^^^^^^^^^^^^
Dereferenced here.
634 int ack_dur;
635 int stbc;
636 int i;
637
638 /* fall back to the old minstrel for legacy stations */
639 if (sta && !sta->ht_cap.ht_supported) {
^^^
Checked here.
640 msp->is_ht = false;
641 memset(&msp->legacy, 0, sizeof(msp->legacy));
It seems like a bug, but I'm not sure how to deal with it.
regards,
dan carpenter
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