net: emaclite: don't call dev_kfree_skb() under spin_lock_irqsave()
authorYang Yingliang <yangyingliang@huawei.com>
Thu, 8 Dec 2022 14:21:44 +0000 (22:21 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 31 Dec 2022 12:14:19 +0000 (13:14 +0100)
commitef08e1082c45288d9d62898cb78c943c81976360
treed3a33392b9a081843c211175bb77f45a73fae4f0
parent2786ef4066d9b1e0dfd751edc4b44fbefccc3225
net: emaclite: don't call dev_kfree_skb() under spin_lock_irqsave()

[ 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: bb81b2ddfa19 ("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>
drivers/net/ethernet/xilinx/xilinx_emaclite.c