mISDN: hfcpci: don't call dev_kfree_skb/kfree_skb() under spin_lock_irqsave()

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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: 1700fe1a10 ("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>

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Yang Yingliang 2022-12-12 16:41:38 +08:00 • committed by Jakub Kicinski

parent ddc9648db1

commit f0f596bd75

1 changed files with 9 additions and 4 deletions

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drivers/isdn/hardware/mISDN/hfcpci.c

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