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mt76: retry rx polling as long as there is budget left

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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]>
This commit is contained in:
Felix Fietkau
2018-01-30 10:23:03 +01:00
parent 50ca27f230
commit 8d9cdd96ca
1 changed files with 7 additions and 3 deletions
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dma.c
+7 -3
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@@ -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;
}