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mt76: mt7915: do not do any work in napi poll after calling napi_complete_done()

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Fixes a race condition where multiple tx cleanup or sta poll tasks could run
in parallel.

Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Felix Fietkau
2020-08-08 09:32:03 +02:00
parent f2e71f0c1b
commit 1eb94624bb
1 changed files with 3 additions and 6 deletions
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mt7915/dma.c
+3 -6
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@@ -95,16 +95,13 @@ static int mt7915_poll_tx(struct napi_struct *napi, int budget)
dev = container_of(napi, struct mt7915_dev, mt76.tx_napi);
mt7915_tx_cleanup(dev);
if (napi_complete_done(napi, 0))
mt7915_irq_enable(dev, MT_INT_TX_DONE_ALL);
mt7915_tx_cleanup(dev);
mt7915_mac_sta_poll(dev);
tasklet_schedule(&dev->mt76.tx_tasklet);
if (napi_complete_done(napi, 0))
mt7915_irq_enable(dev, MT_INT_TX_DONE_ALL);
return 0;
}