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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 5.12 613/677] mt76: mt7921: run mt7921_mcu_fw_log_2_host holding mt76 mutex
Date:   Wed, 12 May 2021 16:50:59 +0200
Message-Id: <20210512144857.739993206@linuxfoundation.org>
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From: Lorenzo Bianconi <lorenzo@kernel.org>

[ Upstream commit 987c8fb4de437344f19a23d074c06faf67520a11 ]

Wake the chip before configuring the mcu log level

Fixes: 1d8efc741df8 ("mt76: mt7921: introduce Runtime PM 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/mt7921/debugfs.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c
index 6aa11ca6fc81..87a7ea12f3b3 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c
@@ -9,10 +9,13 @@ mt7921_fw_debug_set(void *data, u64 val)
 {
 	struct mt7921_dev *dev = data;
 
-	dev->fw_debug = (u8)val;
+	mt7921_mutex_acquire(dev);
 
+	dev->fw_debug = (u8)val;
 	mt7921_mcu_fw_log_2_host(dev, dev->fw_debug);
 
+	mt7921_mutex_release(dev);
+
 	return 0;
 }
 
-- 
2.30.2