[PATCH 5.12 067/363] mt76: mt7915: always check return value from mt7915_mcu_alloc_wtbl_req

From: Greg Kroah-Hartman
Date: Mon May 17 2021 - 10:13:43 EST


From: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>

[ Upstream commit 45f93e368211fbbd247e1ece254ffb121e20fa10 ]

As done for mt76_connac_mcu_alloc_wtbl_req, even if this is not a real
bug since mt7915_mcu_alloc_wtbl_req routine can fails just if nskb is NULL,
always check return value from mt7915_mcu_alloc_wtbl_req in order to avoid
possible future mistake.

Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/wireless/mediatek/mt76/mt7915/mcu.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
index 443cb09ae7cb..c747349a4c13 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
@@ -1198,6 +1198,9 @@ mt7915_mcu_sta_ba(struct mt7915_dev *dev,

wtbl_hdr = mt7915_mcu_alloc_wtbl_req(dev, msta, WTBL_SET, sta_wtbl,
&skb);
+ if (IS_ERR(wtbl_hdr))
+ return PTR_ERR(wtbl_hdr);
+
mt7915_mcu_wtbl_ba_tlv(skb, params, enable, tx, sta_wtbl, wtbl_hdr);

ret = mt76_mcu_skb_send_msg(&dev->mt76, skb,
@@ -1714,6 +1717,9 @@ int mt7915_mcu_sta_update_hdr_trans(struct mt7915_dev *dev,
return -ENOMEM;

wtbl_hdr = mt7915_mcu_alloc_wtbl_req(dev, msta, WTBL_SET, NULL, &skb);
+ if (IS_ERR(wtbl_hdr))
+ return PTR_ERR(wtbl_hdr);
+
mt7915_mcu_wtbl_hdr_trans_tlv(skb, vif, sta, NULL, wtbl_hdr);

return mt76_mcu_skb_send_msg(&dev->mt76, skb, MCU_EXT_CMD(WTBL_UPDATE),
@@ -1738,6 +1744,9 @@ int mt7915_mcu_add_smps(struct mt7915_dev *dev, struct ieee80211_vif *vif,

wtbl_hdr = mt7915_mcu_alloc_wtbl_req(dev, msta, WTBL_SET, sta_wtbl,
&skb);
+ if (IS_ERR(wtbl_hdr))
+ return PTR_ERR(wtbl_hdr);
+
mt7915_mcu_wtbl_smps_tlv(skb, sta, sta_wtbl, wtbl_hdr);

return mt76_mcu_skb_send_msg(&dev->mt76, skb,
@@ -2263,6 +2272,9 @@ int mt7915_mcu_add_sta(struct mt7915_dev *dev, struct ieee80211_vif *vif,

wtbl_hdr = mt7915_mcu_alloc_wtbl_req(dev, msta, WTBL_RESET_AND_SET,
sta_wtbl, &skb);
+ if (IS_ERR(wtbl_hdr))
+ return PTR_ERR(wtbl_hdr);
+
if (enable) {
mt7915_mcu_wtbl_generic_tlv(skb, vif, sta, sta_wtbl, wtbl_hdr);
mt7915_mcu_wtbl_hdr_trans_tlv(skb, vif, sta, sta_wtbl, wtbl_hdr);
--
2.30.2