From 37a68e001578ed1cd7def6a0666f60d2aade4f26 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Thu, 5 Dec 2019 17:46:42 +0100 Subject: [PATCH] mt76: disable bh in mt76_dma_rx_poll Fixes potential RCU issues and avoids calling ieee80211_rx_napi with softirq enabled. Signed-off-by: Felix Fietkau --- drivers/net/wireless/mediatek/mt76/dma.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c index 2298a4e91943..9e03a7871ff4 100644 --- a/drivers/net/wireless/mediatek/mt76/dma.c +++ b/drivers/net/wireless/mediatek/mt76/dma.c @@ -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); -- 2.11.0