From 2b4307f538ab31954e9b6d4ff64b6cf5b33196e1 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Wed, 24 Jan 2018 16:19:10 +0100 Subject: [PATCH] mt76: retry rx polling as long as there is budget left 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 Signed-off-by: Kalle Valo --- 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; } -- 2.30.2