linux-kernel - [PATCH 5.2 40/85] mt76: mt76x0e: disable 5GHz band for MT7630E

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Message-Id: <20190918061235.404229511@linuxfoundation.org>
Date:   Wed, 18 Sep 2019 08:18:58 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Stanislaw Gruszka <sgruszka@...hat.com>,
        Kalle Valo <kvalo@...eaurora.org>
Subject: [PATCH 5.2 40/85] mt76: mt76x0e: disable 5GHz band for MT7630E

From: Stanislaw Gruszka <sgruszka@...hat.com>

commit 70702265a04aa0ce5a7bde77d13456209992b32f upstream.

MT7630E hardware does support 5GHz, but we do not properly configure phy
for 5GHz channels. Scanning at this band not only do not show any APs
but also can hang the firmware.

Since vendor reference driver do not support 5GHz we don't know how
properly configure 5GHz channels. So disable this band for MT7630E .

Cc: stable@...r.kernel.org
Signed-off-by: Stanislaw Gruszka <sgruszka@...hat.com>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/wireless/mediatek/mt76/mt76x0/eeprom.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/net/wireless/mediatek/mt76/mt76x0/eeprom.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/eeprom.c
@@ -59,6 +59,11 @@ static void mt76x0_set_chip_cap(struct m
 		dev_dbg(dev->mt76.dev, "mask out 2GHz support\n");
 	}
 
+	if (is_mt7630(dev)) {
+		dev->mt76.cap.has_5ghz = false;
+		dev_dbg(dev->mt76.dev, "mask out 5GHz support\n");
+	}
+
 	if (!mt76x02_field_valid(nic_conf1 & 0xff))
 		nic_conf1 &= 0xff00;