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mt76: mt7615: rework mt7615_mac_sta_poll for usb code

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Since usb code can't access device registers in interrupt context, move
rcu_read_lock/rcu_read_unlock in mt7615_poll_tx routine. Moreover loop
over a local msta list in mt7615_mac_sta_poll since mt7663u driver will
not be able to complete the inner while loop before sta_poll_list list
is refilled by mt7615_mac_add_txs/mt7615_mac_fill_rx

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Lorenzo Bianconi 2020-04-22 10:47:23 +02:00 committed by Felix Fietkau
parent fdf433121f
commit a621372a04
2 changed files with 10 additions and 12 deletions
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2
drivers/net/wireless/mediatek/mt76/mt7615/dma.c
View File

@ -121,7 +121,9 @@ static int mt7615_poll_tx(struct napi_struct *napi, int budget)
mt7615_tx_cleanup(dev);
rcu_read_lock();
mt7615_mac_sta_poll(dev);
rcu_read_unlock();
tasklet_schedule(&dev->mt76.tx_tasklet);

20
drivers/net/wireless/mediatek/mt76/mt7615/mac.c
View File

@ -724,22 +724,20 @@ void mt7615_mac_sta_poll(struct mt7615_dev *dev)
struct ieee80211_sta *sta;
struct mt7615_sta *msta;
u32 addr, tx_time[4], rx_time[4];
struct list_head sta_poll_list;
int i;
rcu_read_lock();
INIT_LIST_HEAD(&sta_poll_list);
spin_lock_bh(&dev->sta_poll_lock);
list_splice_init(&dev->sta_poll_list, &sta_poll_list);
spin_unlock_bh(&dev->sta_poll_lock);
while (true) {
while (!list_empty(&sta_poll_list)) {
bool clear = false;
spin_lock_bh(&dev->sta_poll_lock);
if (list_empty(&dev->sta_poll_list)) {
spin_unlock_bh(&dev->sta_poll_lock);
break;
}
msta = list_first_entry(&dev->sta_poll_list,
struct mt7615_sta, poll_list);
msta = list_first_entry(&sta_poll_list, struct mt7615_sta,
poll_list);
list_del_init(&msta->poll_list);
spin_unlock_bh(&dev->sta_poll_lock);
addr = mt7615_mac_wtbl_addr(dev, msta->wcid.idx) + 19 * 4;
@ -779,8 +777,6 @@ void mt7615_mac_sta_poll(struct mt7615_dev *dev)
rx_cur);
}
}
rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(mt7615_mac_sta_poll);