Sending frames to mac80211 needs time, which could allow for more rx packets to end up in the DMA ring. Retry polling until there are no more frames left. Improves rx latency under load.
Signed-off-by: Felix Fietkau <[email protected]> --- drivers/net/wireless/mediatek/mt76/dma.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c index ecd409a4a89b..e539b3838b94 100644 --- a/drivers/net/wireless/mediatek/mt76/dma.c +++ b/drivers/net/wireless/mediatek/mt76/dma.c @@ -387,17 +387,21 @@ static int mt76_dma_rx_poll(struct napi_struct *napi, int budget) { struct mt76_dev *dev; - int qid, done; + int qid, done = 0, cur; dev = container_of(napi->dev, struct mt76_dev, napi_dev); qid = napi - dev->napi; - done = mt76_dma_rx_process(dev, &dev->q_rx[qid], budget); + do { + cur = mt76_dma_rx_process(dev, &dev->q_rx[qid], budget - done); + mt76_rx_complete(dev, qid); + done += cur; + } while (cur && done < budget); + if (done < budget) { napi_complete(napi); dev->drv->rx_poll_complete(dev, qid); } - mt76_rx_complete(dev, qid); return done; } -- 2.14.2
