netdev - [PATCH net 3/4] hamradio: don't call dev_kfree_skb() under spin_lock

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Date:   Wed, 7 Dec 2022 15:32:14 +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>, Yang Yingliang <yangyingliang@...wei.com>,
        Joerg Reuter <jreuter@...na.de>
Subject: [PATCH net 3/4] hamradio: don't call dev_kfree_skb() under spin_lock_irqsave()

It is not allowed to call consume_skb() from hardware interrupt context
or with interrupts being disabled. So replace dev_kfree_skb() with
dev_consume_skb_irq() under spin_lock_irqsave().

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
 drivers/net/hamradio/scc.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/hamradio/scc.c b/drivers/net/hamradio/scc.c
index f90830d3dfa6..bd80e8ca6c79 100644
--- a/drivers/net/hamradio/scc.c
+++ b/drivers/net/hamradio/scc.c
@@ -302,12 +302,12 @@ static inline void scc_discard_buffers(struct scc_channel *scc)
 	spin_lock_irqsave(&scc->lock, flags);	
 	if (scc->tx_buff != NULL)
 	{
-		dev_kfree_skb(scc->tx_buff);
+		dev_consume_skb_irq(scc->tx_buff);
 		scc->tx_buff = NULL;
 	}
 	
 	while (!skb_queue_empty(&scc->tx_queue))
-		dev_kfree_skb(skb_dequeue(&scc->tx_queue));
+		dev_consume_skb_irq(skb_dequeue(&scc->tx_queue));
 
 	spin_unlock_irqrestore(&scc->lock, flags);
 }
@@ -1668,7 +1668,7 @@ static netdev_tx_t scc_net_tx(struct sk_buff *skb, struct net_device *dev)
 	if (skb_queue_len(&scc->tx_queue) > scc->dev->tx_queue_len) {
 		struct sk_buff *skb_del;
 		skb_del = skb_dequeue(&scc->tx_queue);
-		dev_kfree_skb(skb_del);
+		dev_consume_skb_irq(skb_del);
 	}
 	skb_queue_tail(&scc->tx_queue, skb);
 	netif_trans_update(dev);
-- 
2.25.1