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wifi: mt76: use atomic iface iteration for pre-TBTT work

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In addition to the previous series I posted, over time I'd
also like to get rid of the iflist_mtx in mac80211. That
isn't easy now since lots of places use iteration and would
have to be audited, but even a cursory look suggests that
mt76 might be more problematic than most since holding the
wiphy lock for the latency-sensitive pre-TBTT work could be
an issue.

Convert the pre-TBTT work to use atomic iteration and then
sending the device commands outside of it.

Signed-off-by: Johannes Berg <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Johannes Berg
2023-09-11 15:13:56 +02:00
committed by Felix Fietkau
parent cd371fcc98
commit d71f8d1b17
3 changed files with 22 additions and 10 deletions
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mt76x02_beacon.c
+3 -5
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@@ -136,7 +136,8 @@ EXPORT_SYMBOL_GPL(mt76x02_resync_beacon_timer);
void
mt76x02_update_beacon_iter(void *priv, u8 *mac, struct ieee80211_vif *vif)
{
struct mt76x02_dev *dev = (struct mt76x02_dev *)priv;
struct beacon_bc_data *data = priv;
struct mt76x02_dev *dev = data->dev;
struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
struct sk_buff *skb = NULL;
@@ -147,7 +148,7 @@ mt76x02_update_beacon_iter(void *priv, u8 *mac, struct ieee80211_vif *vif)
if (!skb)
return;
mt76x02_mac_set_beacon(dev, skb);
__skb_queue_tail(&data->q, skb);
}
EXPORT_SYMBOL_GPL(mt76x02_update_beacon_iter);
@@ -182,9 +183,6 @@ mt76x02_enqueue_buffered_bc(struct mt76x02_dev *dev,
{
int i, nframes;
data->dev = dev;
__skb_queue_head_init(&data->q);
do {
nframes = skb_queue_len(&data->q);
ieee80211_iterate_active_interfaces_atomic(mt76_hw(dev),