linux-kernel - [PATCH 5.12 541/677] mt76: mt7921: always wake the device in mt7921_remove

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Message-Id: <20210512144855.340664768@linuxfoundation.org>
Date:   Wed, 12 May 2021 16:49:47 +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, Sean Wang <sean.wang@...iatek.com>,
        Leon Yen <leon.yen@...iatek.com>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Felix Fietkau <nbd@....name>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.12 541/677] mt76: mt7921: always wake the device in mt7921_remove_interface

From: Lorenzo Bianconi <lorenzo@...nel.org>

[ Upstream commit 859c85fd19715349ce01539459095fd5fc7e483a ]

Make sure the mcu is not in sleep mode before sending mcu messages in
mt7921_remove_interface routine.

Fixes: 1d8efc741df80 ("mt76: mt7921: introduce Runtime PM support")
Co-developed-by: Sean Wang <sean.wang@...iatek.com>
Signed-off-by: Sean Wang <sean.wang@...iatek.com>
Co-developed-by: Leon Yen <leon.yen@...iatek.com>
Signed-off-by: Leon Yen <leon.yen@...iatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
Signed-off-by: Felix Fietkau <nbd@....name>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/mediatek/mt76/mt7921/main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
index 3566059e5704..166c9c0eb5fd 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
@@ -348,6 +348,7 @@ static void mt7921_remove_interface(struct ieee80211_hw *hw,
 	if (vif == phy->monitor_vif)
 		phy->monitor_vif = NULL;
 
+	mt7921_mutex_acquire(dev);
 	mt76_connac_free_pending_tx_skbs(&dev->pm, &msta->wcid);
 
 	if (dev->pm.enable) {
@@ -360,7 +361,6 @@ static void mt7921_remove_interface(struct ieee80211_hw *hw,
 
 	rcu_assign_pointer(dev->mt76.wcid[idx], NULL);
 
-	mt7921_mutex_acquire(dev);
 	dev->mt76.vif_mask &= ~BIT(mvif->mt76.idx);
 	phy->omac_mask &= ~BIT_ULL(mvif->mt76.omac_idx);
 	mt7921_mutex_release(dev);
-- 
2.30.2