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mt76: disable bh in mt76_dma_rx_poll

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

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
2019-12-05 17:46:42 +01:00
parent 2703bafcdb
commit 37a68e0015
1 changed files with 2 additions and 0 deletions
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2
drivers/net/wireless/mediatek/mt76/dma.c
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@@ -538,6 +538,7 @@ mt76_dma_rx_poll(struct napi_struct *napi, int budget)
dev = container_of(napi->dev, struct mt76_dev, napi_dev);
qid = napi - dev->napi;
local_bh_disable();
rcu_read_lock();
do {
@@ -547,6 +548,7 @@ mt76_dma_rx_poll(struct napi_struct *napi, int budget)
} while (cur && done < budget);
rcu_read_unlock();
local_bh_enable();
if (done < budget && napi_complete(napi))
dev->drv->rx_poll_complete(dev, qid);