From: Yu'an Wang <wangyuan46@huawei.com> driver inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I82LC6 CVE: NA -------------------------------- The function qm_poll_qp() may take a while due to complex req_cb, so soft lockup may occur in kernel with preemption disabled. Add a cond_resched() to prevent that. Signed-off-by: Yu'an Wang <wangyuan46@huawei.com> --- drivers/crypto/hisilicon/qm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c index e0fd83465dce..739b1a6565fd 100644 --- a/drivers/crypto/hisilicon/qm.c +++ b/drivers/crypto/hisilicon/qm.c @@ -540,6 +540,8 @@ static void qm_poll_qp(struct hisi_qp *qp, struct hisi_qm *qm) qm_db(qm, qp->qp_id, QM_DOORBELL_CMD_CQ, qp->qp_status.cq_head, 0); atomic_dec(&qp->qp_status.used); + + cond_resched(); } /* set c_flag */ qm_db(qm, qp->qp_id, QM_DOORBELL_CMD_CQ, -- 2.30.0