diff options
| author | Yang Yingliang <yangyingliang@huawei.com> | 2022-12-08 22:21:46 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-12-12 09:56:17 +0000 |
| commit | 3727f742915f04f6fc550b80cf406999bd4e90d0 (patch) | |
| tree | 5c727f096288466efaa44e8a893f2a4cb006b92c /drivers/net | |
| parent | f07fadcbee2a5e84caa67c7c445424200bffb60b (diff) | |
| download | linux-3727f742915f04f6fc550b80cf406999bd4e90d0.tar.bz2 | |
hamradio: 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.
It should use dev_kfree_skb_irq() or dev_consume_skb_irq() instead.
The difference between them is free reason, dev_kfree_skb_irq() means
the SKB is dropped in error and dev_consume_skb_irq() means the SKB
is consumed in normal.
In scc_discard_buffers(), dev_kfree_skb() is called to discard the SKBs,
so replace it with dev_kfree_skb_irq().
In scc_net_tx(), dev_kfree_skb() is called to drop the SKB that exceed
queue length, so replace it with dev_kfree_skb_irq().
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/hamradio/scc.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/hamradio/scc.c b/drivers/net/hamradio/scc.c index f90830d3dfa6..a9184a78650b 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_kfree_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_kfree_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_kfree_skb_irq(skb_del); } skb_queue_tail(&scc->tx_queue, skb); netif_trans_update(dev); |