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wifi: mt76: mt7996: disable beacons when going offchannel

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Avoid leaking beacons on unrelated channels during scanning/roc

Fixes: c56d6edebc ("wifi: mt76: mt7996: use emulated hardware scan support")
Reported-by: Chad Monroe <chad.monroe@adtran.com>
Link: https://patch.msgid.link/20250813121106.81559-1-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
2025-08-13 14:11:05 +02:00
parent 4c2334587b
commit f30906c55a
4 changed files with 42 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
drivers/net/wireless/mediatek/mt76/mt7996/mac.c
View File

@@ -1694,17 +1694,37 @@ mt7996_wait_reset_state(struct mt7996_dev *dev, u32 state)
static void
mt7996_update_vif_beacon(void *priv, u8 *mac, struct ieee80211_vif *vif)
{
struct ieee80211_hw *hw = priv;
struct ieee80211_bss_conf *link_conf;
struct mt7996_phy *phy = priv;
struct mt7996_dev *dev = phy->dev;
unsigned int link_id;
switch (vif->type) {
case NL80211_IFTYPE_MESH_POINT:
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_AP:
mt7996_mcu_add_beacon(hw, vif, &vif->bss_conf);
break;
default:
break;
return;
}
for_each_vif_active_link(vif, link_conf, link_id) {
struct mt7996_vif_link *link;
link = mt7996_vif_link(dev, vif, link_id);
if (!link || link->phy != phy)
continue;
mt7996_mcu_add_beacon(dev->mt76.hw, vif, link_conf);
}
}
void mt7996_mac_update_beacons(struct mt7996_phy *phy)
{
ieee80211_iterate_active_interfaces(phy->mt76->hw,
IEEE80211_IFACE_ITER_RESUME_ALL,
mt7996_update_vif_beacon, phy);
}
static void
@@ -1712,25 +1732,15 @@ mt7996_update_beacons(struct mt7996_dev *dev)
{
struct mt76_phy *phy2, *phy3;
ieee80211_iterate_active_interfaces(dev->mt76.hw,
IEEE80211_IFACE_ITER_RESUME_ALL,
mt7996_update_vif_beacon, dev->mt76.hw);
mt7996_mac_update_beacons(&dev->phy);
phy2 = dev->mt76.phys[MT_BAND1];
if (!phy2)
return;
ieee80211_iterate_active_interfaces(phy2->hw,
IEEE80211_IFACE_ITER_RESUME_ALL,
mt7996_update_vif_beacon, phy2->hw);
if (phy2)
mt7996_mac_update_beacons(phy2->priv);
phy3 = dev->mt76.phys[MT_BAND2];
if (!phy3)
return;
ieee80211_iterate_active_interfaces(phy3->hw,
IEEE80211_IFACE_ITER_RESUME_ALL,
mt7996_update_vif_beacon, phy3->hw);
if (phy3)
mt7996_mac_update_beacons(phy3->priv);
}
void mt7996_tx_token_put(struct mt7996_dev *dev)

5
drivers/net/wireless/mediatek/mt76/mt7996/main.c
View File

@@ -516,6 +516,9 @@ int mt7996_set_channel(struct mt76_phy *mphy)
struct mt7996_phy *phy = mphy->priv;
int ret;
if (mphy->offchannel)
mt7996_mac_update_beacons(phy);
ret = mt7996_mcu_set_chan_info(phy, UNI_CHANNEL_SWITCH);
if (ret)
goto out;
@@ -533,6 +536,8 @@ int mt7996_set_channel(struct mt76_phy *mphy)
mt7996_mac_reset_counters(phy);
phy->noise = 0;
if (!mphy->offchannel)
mt7996_mac_update_beacons(phy);
out:
ieee80211_queue_delayed_work(mphy->hw, &mphy->mac_work,

11
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
View File

@@ -2755,13 +2755,15 @@ int mt7996_mcu_add_beacon(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_bss_conf *link_conf)
{
struct mt7996_dev *dev = mt7996_hw_dev(hw);
struct mt76_vif_link *mlink = mt76_vif_conf_link(&dev->mt76, vif, link_conf);
struct mt7996_vif_link *link = mt7996_vif_conf_link(dev, vif, link_conf);
struct mt76_vif_link *mlink = link ? &link->mt76 : NULL;
struct ieee80211_mutable_offsets offs;
struct ieee80211_tx_info *info;
struct sk_buff *skb, *rskb;
struct tlv *tlv;
struct bss_bcn_content_tlv *bcn;
int len, extra_len = 0;
bool enabled = link_conf->enable_beacon;
if (link_conf->nontransmitted)
return 0;
@@ -2769,13 +2771,16 @@ int mt7996_mcu_add_beacon(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
if (!mlink)
return -EINVAL;
if (link->phy && link->phy->mt76->offchannel)
enabled = false;
rskb = __mt7996_mcu_alloc_bss_req(&dev->mt76, mlink,
MT7996_MAX_BSS_OFFLOAD_SIZE);
if (IS_ERR(rskb))
return PTR_ERR(rskb);
skb = ieee80211_beacon_get_template(hw, vif, &offs, link_conf->link_id);
if (link_conf->enable_beacon && !skb) {
if (enabled && !skb) {
dev_kfree_skb(rskb);
return -EINVAL;
}
@@ -2794,7 +2799,7 @@ int mt7996_mcu_add_beacon(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
len = ALIGN(sizeof(*bcn) + MT_TXD_SIZE + extra_len, 4);
tlv = mt7996_mcu_add_uni_tlv(rskb, UNI_BSS_INFO_BCN_CONTENT, len);
bcn = (struct bss_bcn_content_tlv *)tlv;
bcn->enable = link_conf->enable_beacon;
bcn->enable = enabled;
if (!bcn->enable)
goto out;

1
drivers/net/wireless/mediatek/mt76/mt7996/mt7996.h
View File

@@ -732,6 +732,7 @@ void mt7996_mac_write_txwi(struct mt7996_dev *dev, __le32 *txwi,
struct sk_buff *skb, struct mt76_wcid *wcid,
struct ieee80211_key_conf *key, int pid,
enum mt76_txq_id qid, u32 changed);
void mt7996_mac_update_beacons(struct mt7996_phy *phy);
void mt7996_mac_set_coverage_class(struct mt7996_phy *phy);
void mt7996_mac_work(struct work_struct *work);
void mt7996_mac_reset_work(struct work_struct *work);