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net: emaclite: don't call dev_kfree_skb() under spin_lock_irqsave()

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[ Upstream commit d1678bf45f21fa5ae4a456f821858679556ea5f8 ]

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 xemaclite_tx_timeout() to
drop the SKB, when tx timeout, so replace it with dev_kfree_skb_irq().

Fixes: bb81b2ddfa ("net: add Xilinx emac lite device driver")
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 22:21:44 +08:00 • committed by Greg Kroah-Hartman
commit 3b748ba07b
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/xilinx/xilinx_emaclite.c
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@ -541,7 +541,7 @@ static void xemaclite_tx_timeout(struct net_device *dev)
xemaclite_enable_interrupts(lp);
if (lp->deferred_skb) {
dev_kfree_skb(lp->deferred_skb);
dev_kfree_skb_irq(lp->deferred_skb);
lp->deferred_skb = NULL;
dev->stats.tx_errors++;
}