[PATCH 2/2] mt76: mt76x2: Disable VHT on 0x76320044 ASIC

[Henk Vergonet <henk.vergonet@gmail.com>]

From: Henk Vergonet <Henk.Vergonet@gmail.com>

VHT is not supported on ASIC revision 0x76320044

This fixes the 5G connectibity issue on LiteOn WN4519R module
see https://github.com/openwrt/mt76/issues/971

And may also fix the 5G issues on the XBox One Wireless Adapter
see https://github.com/openwrt/mt76/issues/200
---
 drivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c b/drivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c
index 33a14365ec9b..fbb337ef6b68 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c
@@ -191,6 +191,7 @@ int mt76x2u_register_device(struct mt76x02_dev *dev)
 {
 	struct ieee80211_hw *hw = mt76_hw(dev);
 	struct mt76_usb *usb = &dev->mt76.usb;
+	bool vht_flag;
 	int err;
 
 	INIT_DELAYED_WORK(&dev->cal_work, mt76x2u_phy_calibrate);
@@ -217,7 +218,15 @@ int mt76x2u_register_device(struct mt76x02_dev *dev)
 
 	/* check hw sg support in order to enable AMSDU */
 	hw->max_tx_fragments = dev->mt76.usb.sg_en ? MT_TX_SG_MAX_SIZE : 1;
-	err = mt76_register_device(&dev->mt76, true, mt76x02_rates,
+	switch(dev->mt76.rev ) {
+		/* these ASIC revisions do not support VHT */
+		case 0x76320044:
+			vht_flag = false;
+			break;
+		default:
+			vht_flag = true;
+	}
+	err = mt76_register_device(&dev->mt76, vht_flag, mt76x02_rates,
 				   ARRAY_SIZE(mt76x02_rates));
 	if (err)
 		goto fail;
-- 
2.45.2