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wifi: mt76: mt7996: fix EAPOL source BSS for non-MLD stations

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A non-MLD station's EAPOL and data frames are tagged with link_id ==
IEEE80211_LINK_UNSPECIFIED, which now skips the per-link lookup in
mt7996_mac_write_txwi() and leaves omac_idx/band_idx/wmm_idx at slot
0. When the radio also runs AP VAPs the station's omac is non-zero
(get_omac_idx() prefers HW BSSID slots 1-3), so its EAPOL frames
egress from the wrong BSS and the 4-way handshake times out even
though association succeeds.

In mt7996_tx_prepare_skb(), resolve the link from the peer wcid when
link_id is UNSPECIFIED and the wcid is not the global entry, restoring
the pre-MLO behaviour for station traffic.

Fixes: 934f647104 ("wifi: mt76: mt7996: fix reading zeroed info->control.flags after mt76_tx_status_skb_add()")
Signed-off-by: Chad Monroe <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Chad Monroe
2026-06-30 14:24:23 +02:00
committed by Felix Fietkau
parent f6cf5faff4
commit fe40221e05
1 changed files with 5 additions and 0 deletions
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mt7996/mac.c
+5
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@@ -1030,6 +1030,11 @@ int mt7996_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
IEEE80211_TX_CTRL_MLO_LINK);
}
/* non-MLD frames are LINK_UNSPECIFIED; use the wcid's own link */
if (link_id == IEEE80211_LINK_UNSPECIFIED &&
wcid != &dev->mt76.global_wcid)
link_id = wcid->link_id;
if (link_id != wcid->link_id && link_id != IEEE80211_LINK_UNSPECIFIED) {
if (msta) {
struct mt7996_sta_link *msta_link =