[PATCH] wifi: mt76: connac: check for null before dereferencing

[Muhammad Usama Anjum]

The wcid can be NULL. It should be checked for validity before
dereferencing it to avoid crash.

Fixes: 098428c400ff ("wifi: mt76: connac: set correct muar_idx for mt799x chipsets")
Signed-off-by: Muhammad Usama Anjum <usama.anjum@xxxxxxxxxxxxx>
---
 drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
index af0c2b2aacb00..7af60eebe517a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
@@ -283,7 +283,7 @@ __mt76_connac_mcu_alloc_sta_req(struct mt76_dev *dev, struct mt76_vif *mvif,
 	};
 	struct sk_buff *skb;
 
-	if (is_mt799x(dev) && !wcid->sta)
+	if (is_mt799x(dev) && wcid && !wcid->sta)
 		hdr.muar_idx = 0xe;
 
 	mt76_connac_mcu_get_wlan_idx(dev, wcid, &hdr.wlan_idx_lo,
-- 
2.39.2