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mt76: use rcu_read_lock_bh in mt76_dma_rx_poll

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Fixes potential RCU issues and avoids calling ieee80211_rx_napi with softirq
enabled.

Reported-by: Markus Theil <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Felix Fietkau
2019-11-20 12:37:28 +01:00
parent faf5e6fedd
commit 44825e88a4
1 changed files with 2 additions and 2 deletions
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dma.c
+2 -2
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@@ -528,7 +528,7 @@ mt76_dma_rx_poll(struct napi_struct *napi, int budget)
dev = container_of(napi->dev, struct mt76_dev, napi_dev);
qid = napi - dev->napi;
rcu_read_lock();
rcu_read_lock_bh();
do {
cur = mt76_dma_rx_process(dev, &dev->q_rx[qid], budget - done);
@@ -536,7 +536,7 @@ mt76_dma_rx_poll(struct napi_struct *napi, int budget)
done += cur;
} while (cur && done < budget);
rcu_read_unlock();
rcu_read_unlock_bh();
if (done < budget && napi_complete(napi))
dev->drv->rx_poll_complete(dev, qid);