[PATCH] wifi: mt76: mt7996: fix NULL pointer dereference in mt7996_mcu_sta_bfer_eht

[Ma Ke]

Fix the NULL pointer dereference in mt7996_mcu_sta_bfer_eht.

Found by code review.

Cc: stable at vger.kernel.org
Fixes: ba01944adee9 ("wifi: mt76: mt7996: add EHT beamforming support")
Signed-off-by: Ma Ke <make24 at iscas.ac.cn>
---
 drivers/net/wireless/mediatek/mt76/mt7996/mcu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
index 2e4fa9f48dfb..d0fe2505ddbf 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
@@ -1605,6 +1605,9 @@ mt7996_mcu_sta_bfer_eht(struct ieee80211_sta *sta, struct ieee80211_vif *vif,
 				 IEEE80211_EHT_MCS_NSS_RX) - 1;
 	u8 snd_dim, sts;
 
+	if (!vc)
+		return;
+
 	bf->tx_mode = MT_PHY_TYPE_EHT_MU;
 
 	mt7996_mcu_sta_sounding_rate(bf);
-- 
2.25.1