From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from nbd.name ([46.4.11.11]:48644 "EHLO nbd.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934010AbeAXPTU (ORCPT ); Wed, 24 Jan 2018 10:19:20 -0500 From: Felix Fietkau To: linux-wireless@vger.kernel.org Cc: kvalo@codeaurora.org Subject: [PATCH 1/8] mt76: retry rx polling as long as there is budget left Date: Wed, 24 Jan 2018 16:19:10 +0100 Message-Id: <20180124151917.70962-1-nbd@nbd.name> (sfid-20180124_161927_699492_05A0D71E) Sender: linux-wireless-owner@vger.kernel.org List-ID: 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 --- 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