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[v2,04/18] wifi: mac80211: relax RCU check in for_each_vif_active_link()

Message ID 20230920211508.858921bd2860.I01f456be8ce2a4fbd15e0d44302e2f7d72e91987@changeid (mailing list archive)
State Accepted
Delegated to: Johannes Berg
Headers show
Series cfg80211/mac80211 patches from our internal tree 2023-09-18 | expand

Commit Message

Greenman, Gregory Sept. 20, 2023, 6:25 p.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

To iterate the vif links we don't necessarily need to be in an
RCU critical section, it's also possible to hold the sdata/wdev
mutex. Annotate for_each_vif_active_link() accordingly.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
---
 include/net/mac80211.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 8d993f6ab919..7aea4787e62b 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1942,7 +1942,7 @@  static inline bool ieee80211_vif_is_mld(const struct ieee80211_vif *vif)
 	for (link_id = 0; link_id < ARRAY_SIZE((vif)->link_conf); link_id++)	\
 		if ((!(vif)->active_links ||					\
 		     (vif)->active_links & BIT(link_id)) &&			\
-		    (link = rcu_dereference((vif)->link_conf[link_id])))
+		    (link = link_conf_dereference_check(vif, link_id)))
 
 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif)
 {