This is a note to let you know that I've just added the patch titled
wifi: mac80211: fix RCU usage warning in mesh fast-xmit
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-mac80211-fix-rcu-usage-warning-in-mesh-fast-xmi.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4dda23f93758ba16b39400af1d22768c7b124fdb
Author: Johannes Berg <johannes.berg@xxxxxxxxx>
Date: Mon Sep 11 11:57:52 2023 +0200
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 <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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);
