From: Sean Wang sean.wang@mediatek.com
[ Upstream commit 59c20b91786d5f140ee7be2f24c242b5f8986046 ]
Add mt7921_mutex_acquire at mt7921_[start, stop]_ap to fix the race with the context holding dev->muxtex and the driver might access the device in low power state.
Fixes: 24299fc869f7 ("mt76: mt7921: enable rx header traslation offload") Tested-by: AngeloGioacchino Del Regno angelogioacchino.delregno@collabora.com Acked-by: Lorenzo Bianconi lorenzo@kernel.org Signed-off-by: Sean Wang sean.wang@mediatek.com Signed-off-by: Felix Fietkau nbd@nbd.name Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/mediatek/mt76/mt7921/main.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c index 63fd33dcd3af..7214735011d0 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c @@ -1404,6 +1404,8 @@ static void mt7921_sta_set_decap_offload(struct ieee80211_hw *hw, struct mt7921_sta *msta = (struct mt7921_sta *)sta->drv_priv; struct mt7921_dev *dev = mt7921_hw_dev(hw);
+ mt7921_mutex_acquire(dev); + if (enabled) set_bit(MT_WCID_FLAG_HDR_TRANS, &msta->wcid.flags); else @@ -1411,6 +1413,8 @@ static void mt7921_sta_set_decap_offload(struct ieee80211_hw *hw,
mt76_connac_mcu_sta_update_hdr_trans(&dev->mt76, vif, &msta->wcid, MCU_UNI_CMD(STA_REC_UPDATE)); + + mt7921_mutex_release(dev); }
#if IS_ENABLED(CONFIG_IPV6)