Commit fbe50d9a authored by Felix Fietkau's avatar Felix Fietkau
Browse files

mt76: allow drivers to drop rx packets early 



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

Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
parent 5360522a

drivers/net/wireless/mediatek/mt76/dma.c

+12 −7
Original line number Diff line number Diff line
@@ -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);

drivers/net/wireless/mediatek/mt76/mt76.h

+2 −0
Original line number Diff line number Diff line
@@ -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);