2023-03-03 08:37:57

by Shayne Chen

[permalink] [raw]
Subject: [PATCH 4/7] wifi: mt76: mt7996: fix pointer calculation in ie countdown event

From: Peter Chiu <[email protected]>

Fix the tail and data pointers. The rxd->len in mt7996_mcu_rxd does not
include the length of general rxd. It only includes the length of
firmware event rxd. Use skb->length to get the correct length.

Fixes: 98686cd21624 ("wifi: mt76: mt7996: add driver for MediaTek Wi-Fi 7 (802.11be) devices")
Signed-off-by: Peter Chiu <[email protected]>
Signed-off-by: Shayne Chen <[email protected]>
---
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
index 90d8135a649a..c11e92db5f07 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
@@ -422,7 +422,8 @@ mt7996_mcu_ie_countdown(struct mt7996_dev *dev, struct sk_buff *skb)
if (hdr->band && dev->mt76.phys[hdr->band])
mphy = dev->mt76.phys[hdr->band];

- tail = skb->data + le16_to_cpu(rxd->len);
+ tail = skb->data + skb->len;
+ data += sizeof(struct header);
while (data + sizeof(struct tlv) < tail && le16_to_cpu(tlv->len)) {
switch (le16_to_cpu(tlv->tag)) {
case UNI_EVENT_IE_COUNTDOWN_CSA:
--
2.39.2