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Message-ID: <20221208142147.2376671-3-yangyingliang@huawei.com>
Date: Thu, 8 Dec 2022 22:21:45 +0800
From: Yang Yingliang <yangyingliang@...wei.com>
To: <netdev@...r.kernel.org>
CC: <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
<pabeni@...hat.com>, <leon@...nel.org>,
Yang Yingliang <yangyingliang@...wei.com>,
Ilya Yanok <yanok@...raft.com>
Subject: [PATCH net v3 2/4] net: ethernet: dnet: don't call dev_kfree_skb() under spin_lock_irqsave()
It is not allowed to call kfree_skb() or consume_skb() from hardware
interrupt context or with hardware interrupts being disabled.
In this case, the lock is used to protected 'bp', so we can move
dev_kfree_skb() after the spin_unlock_irqrestore().
Fixes: 4796417417a6 ("dnet: Dave DNET ethernet controller driver (updated)")
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
drivers/net/ethernet/dnet.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/dnet.c b/drivers/net/ethernet/dnet.c
index 08184f20f510..151ca9573be9 100644
--- a/drivers/net/ethernet/dnet.c
+++ b/drivers/net/ethernet/dnet.c
@@ -550,11 +550,11 @@ static netdev_tx_t dnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
skb_tx_timestamp(skb);
+ spin_unlock_irqrestore(&bp->lock, flags);
+
/* free the buffer */
dev_kfree_skb(skb);
- spin_unlock_irqrestore(&bp->lock, flags);
-
return NETDEV_TX_OK;
}
--
2.25.1
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