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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Lorenzo Bianconi <lorenzo@kernel.org>,
        Felix Fietkau <nbd@nbd.name>, Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.16 0317/1039] mt76: connac: fix last_chan configuration in mt76_connac_mcu_rate_txpower_band
Date:   Mon, 24 Jan 2022 19:35:06 +0100
Message-Id: <20220124184135.951734676@linuxfoundation.org>
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From: Lorenzo Bianconi <lorenzo@kernel.org>

[ Upstream commit 73c7c0443685d8d152c3451e7305a2c2bc47b32e ]

last_ch configuration must not be dependent on the current configured band
but it is defined by hw capabilities since the fw always expects the
following order:
- 2GHz
- 5GHz
- 6GHz

Fixes: 9b2ea8eee42a1 ("mt76: connac: set 6G phymode in single-sku support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
index 61c4c86e79c88..b15bbd650a90c 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
@@ -2008,12 +2008,12 @@ mt76_connac_mcu_rate_txpower_band(struct mt76_phy *phy,
 	}
 	batch_size = DIV_ROUND_UP(n_chan, batch_len);
 
-	if (!phy->cap.has_5ghz)
-		last_ch = chan_list_2ghz[n_chan - 1];
-	else if (phy->cap.has_6ghz)
-		last_ch = chan_list_6ghz[n_chan - 1];
+	if (phy->cap.has_6ghz)
+		last_ch = chan_list_6ghz[ARRAY_SIZE(chan_list_6ghz) - 1];
+	else if (phy->cap.has_5ghz)
+		last_ch = chan_list_5ghz[ARRAY_SIZE(chan_list_5ghz) - 1];
 	else
-		last_ch = chan_list_5ghz[n_chan - 1];
+		last_ch = chan_list_2ghz[ARRAY_SIZE(chan_list_2ghz) - 1];
 
 	for (i = 0; i < batch_size; i++) {
 		struct mt76_connac_tx_power_limit_tlv tx_power_tlv = {};
-- 
2.34.1