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crypto: hisilicon/qm - fix the call trace when unbind device

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Call trace will appear in the Hisilicon crypto driver unbinding or
disabling SRIOV during task running with TFMs on the corresponding
function.
The log looks like this:
	[  293.908078] Call trace:
	[  293.908080]  __queue_work+0x494/0x548
	[  293.908081]  queue_work_on+0x84/0xd8
	[  293.908092]  qm_irq+0x4c/0xd0 [hisi_qm]
	[  293.908096]  __handle_irq_event_percpu+0x74/0x2a0
	[  293.908098]  handle_irq_event_percpu+0x40/0x98
	[  293.908099]  handle_irq_event+0x4c/0x80
	[  293.908101]  handle_fasteoi_irq+0xb0/0x170
	[  293.908102]  generic_handle_irq+0x3c/0x58
	[  293.908103]  __handle_domain_irq+0x68/0xc0
	[  293.908104]  gic_handle_irq+0xb4/0x298
	[  293.908105]  el1_irq+0xcc/0x180
	[  293.908107]  arch_cpu_idle+0x38/0x228
	[  293.908110]  default_idle_call+0x20/0x40
	[  293.908113]  do_idle+0x1cc/0x2b8
	[  293.908114]  cpu_startup_entry+0x2c/0x30
	[  293.908115]  rest_init+0xdc/0xe8
	[  293.908117]  arch_call_rest_init+0x14/0x1c
	[  293.908117]  start_kernel+0x490/0x4c4

This patch adds a waiting logic as user doing the above two operations
to avoid panic. The two operations will hold on in the driver
remove function until the tasks release all their relative TFMs.

Signed-off-by: Hui Tang <tanghui20@huawei.com>
Signed-off-by: Weili Qian <qianweili@huawei.com>
Signed-off-by: Yang Shen <shenyang39@huawei.com>
Reviewed-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Weili Qian
2020-08-15 17:56:16 +08:00
committed by Herbert Xu
parent 64dfe49528
commit daa31783c0
5 changed files with 99 additions and 9 deletions
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3
drivers/crypto/hisilicon/sec2/sec_main.c
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@@ -917,12 +917,13 @@ static void sec_remove(struct pci_dev *pdev)
struct sec_dev *sec = pci_get_drvdata(pdev);
struct hisi_qm *qm = &sec->qm;
hisi_qm_wait_task_finish(qm, &sec_devices);
sec_unregister_from_crypto();
hisi_qm_del_from_list(qm, &sec_devices);
if (qm->fun_type == QM_HW_PF && qm->vfs_num)
hisi_qm_sriov_disable(pdev);
hisi_qm_sriov_disable(pdev, qm->is_frozen);
sec_debugfs_exit(qm);