wifi: mac80211: fix MLO + AP_VLAN check

Instead of preventing adding AP_VLAN to MLO enabled APs, this check was
preventing adding more than one 4-addr AP_VLAN regardless of the MLO status.
Fix this by adding missing extra checks.

Fixes: ae960ee90bb1 ("wifi: mac80211: prevent VLANs on MLDs")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20221214130326.37756-1-nbd@nbd.name
Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index d49a5906a94351f37644a3ccca4eba90379ee591..e20c3fe9a0b19439794a5b6fb9f696ee6b87ce8d 100644 (file)
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -364,7 +364,9 @@ static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
 
                        /* No support for VLAN with MLO yet */
                        if (iftype == NL80211_IFTYPE_AP_VLAN &&
-                           nsdata->wdev.use_4addr)
+                           sdata->wdev.use_4addr &&
+                           nsdata->vif.type == NL80211_IFTYPE_AP &&
+                           nsdata->vif.valid_links)
                                return -EOPNOTSUPP;
 
                        /*