When header translation failure is indicated, the hardware will insert
an extra 2-byte field containing the data length after the protocol
type field. This happens either when the LLC-SNAP pattern did not match,
or if a VLAN header was detected.
The previous commit accidentally breaks the logic, so reverts back.
Fixes: 27db47ab1f47 (wifi: mt76: mt7996: enable mesh HW amsdu/de-amsdu support)
Signed-off-by: Ryder Lee <ryder.lee@xxxxxxxxxxxx>
---
drivers/net/wireless/mediatek/mt76/mt7996/mac.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mac.c b/drivers/net/wireless/mediatek/mt76/mt7996/mac.c
index 39a4a73ef8e6..4c03d5a3bcea 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/mac.c
@@ -836,14 +836,19 @@ mt7996_mac_fill_rx(struct mt7996_dev *dev, struct sk_buff *skb)
skb_pull(skb, hdr_gap);
if (!hdr_trans && status->amsdu && !(ieee80211_has_a4(fc) && is_mesh)) {
pad_start = ieee80211_get_hdrlen_from_skb(skb);
- } else if (hdr_trans && (rxd2 & MT_RXD2_NORMAL_HDR_TRANS_ERROR) &&
- get_unaligned_be16(skb->data + pad_start) == ETH_P_8021Q) {
+ } else if (hdr_trans && (rxd2 & MT_RXD2_NORMAL_HDR_TRANS_ERROR)) {
/* When header translation failure is indicated,
* the hardware will insert an extra 2-byte field
* containing the data length after the protocol
- * type field.
+ * type field. This happens either when the LLC-SNAP
+ * pattern did not match, or if a VLAN header was
+ * detected.
*/
- pad_start = 16;
+ pad_start = 12;
+ if (get_unaligned_be16(skb->data + pad_start) == ETH_P_8021Q)
+ pad_start += 4;
+ else
+ pad_start = 0;
}
if (pad_start) {
--
2.18.0
