[PATCH 2/2] wifi: mt76: mt7921: prevent decap offload config before STA initialization

[Deren Wu]

From: Deren Wu <deren.wu at mediatek.com>

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 at vger.kernel.org
Fixes: 24299fc869f7 ("mt76: mt7921: enable rx header traslation offload")
Signed-off-by: Deren Wu <deren.wu at mediatek.com>
---
 drivers/net/wireless/mediatek/mt76/mt7921/main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
index 1fffa43379b2..77f73ae1d7ec 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
@@ -1180,6 +1180,9 @@ 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->deflink.wcid.sta)
+		return;
+
 	mt792x_mutex_acquire(dev);
 
 	if (enabled)
-- 
2.18.0