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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 5.13 123/266] mt76: mt7921: reset wfsys during hw probe
Date:   Thu, 15 Jul 2021 20:37:58 +0200
Message-Id: <20210715182635.612615526@linuxfoundation.org>
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From: Lorenzo Bianconi <lorenzo@kernel.org>

[ Upstream commit 01f7da40917923bf9d8fd8d5c9a6ed646004e47c ]

This patch fixes a mcu hang during device probe on
Marvell ESPRESSObin after a hot reboot.

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/dma.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/dma.c b/drivers/net/wireless/mediatek/mt76/mt7921/dma.c
index bd9143dc865f..7fca7dc466b8 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/dma.c
@@ -402,6 +402,10 @@ int mt7921_dma_init(struct mt7921_dev *dev)
 	if (ret)
 		return ret;
 
+	ret = mt7921_wfsys_reset(dev);
+	if (ret)
+		return ret;
+
 	/* init tx queue */
 	ret = mt7921_init_tx_queues(&dev->phy, MT7921_TXQ_BAND0,
 				    MT7921_TX_RING_SIZE);
-- 
2.30.2