[PATCH mt76-next 07/25] wifi: mt76: mt7996: advertise preamble puncturing support

[Felix Fietkau <nbd@nbd.name>]

nl80211 refuses a non-zero NL80211_ATTR_PUNCT_BITMAP for a driver
without NL80211_EXT_FEATURE_PUNCT, so an mt7996 AP cannot start or
switch to a punctured channel.

Advertise the feature. mt7996_set_channel() sends the puncturing bitmap
of every chanctx to the firmware, including after a puncturing-only
chanctx change.

Co-developed-by: Shayne Chen <shayne.chen@mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 drivers/net/wireless/mediatek/mt76/mt7996/init.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/init.c b/drivers/net/wireless/mediatek/mt76/mt7996/init.c
index cc94eade9950..f44a3a8588d3 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/init.c
@@ -526,6 +526,7 @@ mt7996_init_wiphy(struct ieee80211_hw *hw, struct mtk_wed_device *wed)
 	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
 	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER);
 	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_SET_SCAN_DWELL);
+	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_PUNCT);
 
 	if (mt7996_eeprom_has_background_radar(dev) &&
 	    (!mdev->dev->of_node ||
-- 
2.47.3