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mt76: usb: fix use of q->head and q->tail 

Their use is reversed compared to DMA. The order for DMA makes more sense,
so let's use that

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2020-08-23 12:42:18 +02:00
parent d407afcbd6
commit 95f61e17ef
1 changed files with 15 additions and 15 deletions
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30
drivers/net/wireless/mediatek/mt76/usb.c
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@ -497,8 +497,8 @@ mt76u_get_next_rx_entry(struct mt76_queue *q)
spin_lock_irqsave(&q->lock, flags);
if (q->queued > 0) {
urb = q->entry[q->head].urb;
q->head = (q->head + 1) % q->ndesc;
urb = q->entry[q->tail].urb;
q->tail = (q->tail + 1) % q->ndesc;
q->queued--;
}
spin_unlock_irqrestore(&q->lock, flags);
@ -622,10 +622,10 @@ static void mt76u_complete_rx(struct urb *urb)
}
spin_lock_irqsave(&q->lock, flags);
if (WARN_ONCE(q->entry[q->tail].urb != urb, "rx urb mismatch"))
if (WARN_ONCE(q->entry[q->head].urb != urb, "rx urb mismatch"))
goto out;
q->tail = (q->tail + 1) % q->ndesc;
q->head = (q->head + 1) % q->ndesc;
q->queued++;
tasklet_schedule(&dev->usb.rx_tasklet);
out:
@ -808,17 +808,17 @@ static void mt76u_tx_tasklet(unsigned long data)
q = sq->q;
while (q->queued > n_dequeued) {
if (!q->entry[q->head].done)
if (!q->entry[q->tail].done)
break;
if (q->entry[q->head].schedule) {
q->entry[q->head].schedule = false;
if (q->entry[q->tail].schedule) {
q->entry[q->tail].schedule = false;
n_sw_dequeued++;
}
entry = q->entry[q->head];
q->entry[q->head].done = false;
q->head = (q->head + 1) % q->ndesc;
entry = q->entry[q->tail];
q->entry[q->tail].done = false;
q->tail = (q->tail + 1) % q->ndesc;
n_dequeued++;
dev->drv->tx_complete_skb(dev, i, &entry);
@ -913,7 +913,7 @@ mt76u_tx_queue_skb(struct mt76_dev *dev, enum mt76_txq_id qid,
struct mt76_tx_info tx_info = {
.skb = skb,
};
u16 idx = q->tail;
u16 idx = q->head;
int err;
if (q->queued == q->ndesc)
@ -932,7 +932,7 @@ mt76u_tx_queue_skb(struct mt76_dev *dev, enum mt76_txq_id qid,
q->entry[idx].urb, mt76u_complete_tx,
&q->entry[idx]);
q->tail = (q->tail + 1) % q->ndesc;
q->head = (q->head + 1) % q->ndesc;
q->entry[idx].skb = tx_info.skb;
q->queued++;
@ -944,7 +944,7 @@ static void mt76u_tx_kick(struct mt76_dev *dev, struct mt76_queue *q)
struct urb *urb;
int err;
while (q->first != q->tail) {
while (q->first != q->head) {
urb = q->entry[q->first].urb;
trace_submit_urb(dev, urb);
@ -1071,8 +1071,8 @@ void mt76u_stop_tx(struct mt76_dev *dev)
/* Assure we are in sync with killed tasklet. */
spin_lock_bh(&q->lock);
while (q->queued) {
entry = q->entry[q->head];
q->head = (q->head + 1) % q->ndesc;
entry = q->entry[q->tail];
q->tail = (q->tail + 1) % q->ndesc;
q->queued--;
dev->drv->tx_complete_skb(dev, i, &entry);