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ethernet: s2io: don't call dev_kfree_skb() under spin_lock_irqsave()

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[ Upstream commit 6cee96e09d ]

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 this case, dev_kfree_skb() is called in free_tx_buffers() to drop
the SKBs in tx buffers, when the card is down, so replace it with
dev_kfree_skb_irq() here.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Yingliang 2022-12-08 20:01:21 +08:00 • committed by Greg Kroah-Hartman
commit 0b3f452d0c
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/neterion/s2io.c
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@ -2384,7 +2384,7 @@ static void free_tx_buffers(struct s2io_nic *nic)
skb = s2io_txdl_getskb(&mac_control->fifos[i], txdp, j);
if (skb) {
swstats->mem_freed += skb->truesize;
dev_kfree_skb(skb);
dev_kfree_skb_irq(skb);
cnt++;
}
}