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mt76: allow drivers to drop rx packets early

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This can be used to free received events without allocating an extra skb

Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Felix Fietkau
2021-12-03 18:01:54 +01:00
parent 678071ef70
commit 833b9d7fcf
2 changed files with 14 additions and 7 deletions
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dma.c
+12 -7
View File
@@ -572,9 +572,7 @@ mt76_dma_rx_process(struct mt76_dev *dev, struct mt76_queue *q, int budget)
if (data_len < len + q->buf_offset) {
dev_kfree_skb(q->rx_head);
q->rx_head = NULL;
skb_free_frag(data);
continue;
goto free_frag;
}
if (q->rx_head) {
@@ -582,11 +580,14 @@ mt76_dma_rx_process(struct mt76_dev *dev, struct mt76_queue *q, int budget)
continue;
}
if (!more && dev->drv->rx_check &&
!(dev->drv->rx_check(dev, data, len)))
goto free_frag;
skb = build_skb(data, q->buf_size);
if (!skb) {
skb_free_frag(data);
continue;
}
if (!skb)
goto free_frag;
skb_reserve(skb, q->buf_offset);
if (q == &dev->q_rx[MT_RXQ_MCU]) {
@@ -603,6 +604,10 @@ mt76_dma_rx_process(struct mt76_dev *dev, struct mt76_queue *q, int budget)
}
dev->drv->rx_skb(dev, q - dev->q_rx, skb);
continue;
free_frag:
skb_free_frag(data);
}
mt76_dma_rx_fill(dev, q);
mt76.h
+2
View File
@@ -373,6 +373,8 @@ struct mt76_driver_ops {
bool (*tx_status_data)(struct mt76_dev *dev, u8 *update);
bool (*rx_check)(struct mt76_dev *dev, void *data, int len);
void (*rx_skb)(struct mt76_dev *dev, enum mt76_rxq_id q,
struct sk_buff *skb);