From 4df22710a77d2365e56d720bc4106e54c1dfa2ff Mon Sep 17 00:00:00 2001 From: Jose Ignacio Tornos Martinez Date: Thu, 2 Jul 2026 12:43:37 +0200 Subject: [PATCH] wifi: mt76: mt7996: remove beacon_int_min_gcd from ADHOC interface combinations The driver fails to register with error -22 (EINVAL) due to a cfg80211 validation failure in wiphy_verify_iface_combinations(). Commit 5ef0e8e2653b ("wifi: mt76: mt7996: fix iface combination for different chipsets") added beacon_int_min_gcd to if_comb_global and if_comb_global_7992, but these combinations include ADHOC (IBSS) interface type. This violates a cfg80211 rule from commit 56271da29c52 ("cfg80211: disallow beacon_int_min_gcd with IBSS") that explicitly forbids combining ADHOC with beacon_int_min_gcd. The restriction exists because beacon_int_min_gcd requires static, predictable beacon intervals to coordinate multiple beaconing interfaces, but ADHOC interfaces have dynamic beacon intervals that change when joining different networks, making the GCD constraint unenforceable. Remove beacon_int_min_gcd from the interface combinations that include ADHOC because they are not necessary for ADHOC operation. The if_comb combination (AP/MESH/STA only, without ADHOC) correctly retains beacon_int_min_gcd for multi-AP coordination. Fixes: 5ef0e8e2653b ("wifi: mt76: mt7996: fix iface combination for different chipsets") Signed-off-by: Jose Ignacio Tornos Martinez Tested-by: Alex Gavin Link: https://patch.msgid.link/20260702104337.679536-1-jtornosm@redhat.com Signed-off-by: Felix Fietkau --- drivers/net/wireless/mediatek/mt76/mt7996/init.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/init.c b/drivers/net/wireless/mediatek/mt76/mt7996/init.c index 70902395bc96..fb635a092584 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/init.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/init.c @@ -34,7 +34,6 @@ static const struct ieee80211_iface_combination if_comb_global = { BIT(NL80211_CHAN_WIDTH_40) | BIT(NL80211_CHAN_WIDTH_80) | BIT(NL80211_CHAN_WIDTH_160), - .beacon_int_min_gcd = 100, }; static const struct ieee80211_iface_combination if_comb_global_7992 = { @@ -47,7 +46,6 @@ static const struct ieee80211_iface_combination if_comb_global_7992 = { BIT(NL80211_CHAN_WIDTH_40) | BIT(NL80211_CHAN_WIDTH_80) | BIT(NL80211_CHAN_WIDTH_160), - .beacon_int_min_gcd = 100, }; static const struct ieee80211_iface_limit if_limits[] = {