[PATCH 07/15] wifi: mt76: mt7925: use OFDM-only PHY mode for NAN STA records

[Sean Wang <sean.wang@kernel.org>]

From: Stella Liu <yu-ching.liu@mediatek.com>

NAN operates with OFDM and does not support CCK, so the phy, rate
control and BSS rate TLVs must not fall back to 2.4 GHz. Borrow the
5 GHz band lookup to keep the STA records OFDM-only.

Fixes: 0f3605e4f8de ("wifi: mt76: mt7925: wire up NAN operations")
Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Stella Liu <yu-ching.liu@mediatek.com>
---
 drivers/net/wireless/mediatek/mt76/mt7925/mcu.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
index fa29c486a455..1cfc209f9be5 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
@@ -1914,11 +1914,9 @@ mt7925_mcu_sta_phy_tlv(struct sk_buff *skb,
 	phy = (struct sta_rec_phy *)tlv;
 
 	if (mt7925_vif_is_nan(vif)) {
-		enum nl80211_band band = chandef->chan ? chandef->chan->band
-						       : NL80211_BAND_2GHZ;
 		phy->phy_type = PHY_TYPE_BIT_OFDM | PHY_TYPE_BIT_ERP;
 		phy->phy_type |= mt76_connac_get_phy_mode_v2(mvif->phy->mt76, vif,
-							     band,
+							     NL80211_BAND_5GHZ,
 							     link_sta);
 	} else {
 		phy->phy_type = mt76_connac_get_phy_mode_v2(mvif->phy->mt76, vif,
@@ -2003,7 +2001,11 @@ mt7925_mcu_sta_rate_ctrl_tlv(struct sk_buff *skb,
 	ra_info = (struct sta_rec_ra_info *)tlv;
 
 	if (mt7925_vif_is_nan(vif))
-		band = chandef->chan ? chandef->chan->band : NL80211_BAND_2GHZ;
+		/* NAN is OFDM-only per spec; borrow the 5 GHz band lookup to
+		 * avoid PHY_TYPE_BIT_HR_DSSS/CCK bits being added to phy_type.
+		 * NAN interfaces have no chanctx, so chandef->chan is always NULL.
+		 */
+		band = NL80211_BAND_5GHZ;
 	else
 		band = chandef->chan->band;
 
@@ -2847,7 +2849,7 @@ mt7925_mcu_bss_bmc_tlv(struct sk_buff *skb, struct mt792x_phy *phy,
 	bmc = (struct bss_rate_tlv *)tlv;
 
 	if (mt7925_vif_is_nan(vif))
-		band = chandef->chan ? chandef->chan->band : NL80211_BAND_2GHZ;
+		band = NL80211_BAND_5GHZ;
 	else
 		band = chandef->chan->band;
 
-- 
2.43.0