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wifi: mac80211: tighten locking check 

When we remove a link that doesn't have a channel context,
we don't really need the local->mtx locking. Tighten the
check here.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2022-07-06 10:09:57 +02:00
parent cdf0a0a80c
commit 939c4c7e82
1 changed files with 4 additions and 3 deletions
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7
net/mac80211/chan.c
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@ -1991,10 +1991,11 @@ void ieee80211_link_release_channel(struct ieee80211_link_data *link)
WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev));
lockdep_assert_held(&sdata->local->mtx);
mutex_lock(&sdata->local->chanctx_mtx);
__ieee80211_link_release_channel(link);
if (rcu_access_pointer(link->conf->chanctx_conf)) {
lockdep_assert_held(&sdata->local->mtx);
__ieee80211_link_release_channel(link);
}
mutex_unlock(&sdata->local->chanctx_mtx);
}