From: Johannes Berg Date: Mon, 11 Sep 2023 09:57:52 +0000 (+0200) Subject: wifi: mac80211: fix RCU usage warning in mesh fast-xmit X-Git-Tag: v6.5.12~508 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=13455e5b986485fa222fec4f1f82e2a7b7c45e40;p=thirdparty%2Fkernel%2Fstable.git wifi: mac80211: fix RCU usage warning in mesh fast-xmit [ Upstream commit 5ea82df1f50e42416d0a8a7c42d37cc1df1545fe ] In mesh_fast_tx_flush_addr() we already hold the lock, so don't need additional hashtable RCU protection. Use the rhashtable_lookup_fast() variant to avoid RCU protection warnings. Fixes: d5edb9ae8d56 ("wifi: mac80211: mesh fast xmit support") Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c index d32e304eeb4ba..3e52aaa57b1fc 100644 --- a/net/mac80211/mesh_pathtbl.c +++ b/net/mac80211/mesh_pathtbl.c @@ -648,7 +648,7 @@ void mesh_fast_tx_flush_addr(struct ieee80211_sub_if_data *sdata, cache = &sdata->u.mesh.tx_cache; spin_lock_bh(&cache->walk_lock); - entry = rhashtable_lookup(&cache->rht, addr, fast_tx_rht_params); + entry = rhashtable_lookup_fast(&cache->rht, addr, fast_tx_rht_params); if (entry) mesh_fast_tx_entry_free(cache, entry); spin_unlock_bh(&cache->walk_lock);