wifi: mt76: mt7921: prevent decap offload config before STA initialization

[ Upstream commit 7035a082348acf1d43ffb9ff735899f8e3863f8f ]

The decap offload configuration should only be applied after the STA has
been successfully initialized. Attempting to configure it earlier can lead
to corruption of the MAC configuration in the chip's hardware state.

Add an early check for `msta->deflink.wcid.sta` to ensure the station peer
is properly initialized before proceeding with decapsulation offload
configuration.

Cc: stable@vger.kernel.org
Fixes: 24299fc869f7 ("mt76: mt7921: enable rx header traslation offload")
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Link: https://patch.msgid.link/f23a72ba7a3c1ad38ba9e13bb54ef21d6ef44ffb.1748149855.git.deren.wu@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
[ Changed msta->deflink.wcid.sta to msta->wcid.sta ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
index 8e2ec395633171604eff97cb9b83c5590c209916..15b7d22d3639f255fb5ef784abff1511f7f89839 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
@@ -1087,6 +1087,9 @@ static void mt7921_sta_set_decap_offload(struct ieee80211_hw *hw,
        struct mt792x_sta *msta = (struct mt792x_sta *)sta->drv_priv;
        struct mt792x_dev *dev = mt792x_hw_dev(hw);
 
+       if (!msta->wcid.sta)
+               return;
+
        mt792x_mutex_acquire(dev);
 
        if (enabled)