tree b797af6e7912e8cbbce188b0da22ed6c913ad81c
parent ddc9648db162eee556edd5222d2808fe33730203
author Yang Yingliang <yangyingliang@huawei.com> 1670834498 +0800
committer Jakub Kicinski <kuba@kernel.org> 1670988292 -0800

mISDN: hfcpci: don't call dev_kfree_skb/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.

skb_queue_purge() is called under spin_lock_irqsave() in hfcpci_l2l1D(),
kfree_skb() is called in it, to fix this, use skb_queue_splice_init()
to move the dch->squeue to a free queue, also enqueue the tx_skb and
rx_skb, at last calling __skb_queue_purge() to free the SKBs afer unlock.

Fixes: 1700fe1a10dc ("Add mISDN HFC PCI driver")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>