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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 <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2020-08-07 20:57:46 +02:00
parent 6e4f584e2b
commit 38b04398c5
1 changed files with 3 additions and 6 deletions
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9
drivers/net/wireless/mediatek/mt76/mt7915/dma.c
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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;
}