From b37858dcf1bc1dec92729ccd03d6a11a96bbe3e4 Mon Sep 17 00:00:00 2001 From: Xi Wang Date: Mon, 15 Apr 2019 20:10:31 +0800 Subject: [PATCH] RDMA/hns: Fixs hw access invalid dma memory error driver inclusion category: bugfix bugzilla: NA CVE: NA When smmu is enable, if execute the perftest command and then use 'kill -9' to exit, follow this operation repeatedly, the kernel will have a high probability to print the following smmu event: [ 173.183547] arm-smmu-v3 arm-smmu-v3.1.auto: event 0x10 received: [ 173.191862] arm-smmu-v3 arm-smmu-v3.1.auto: 0x00007d0000000010 [ 173.200551] arm-smmu-v3 arm-smmu-v3.1.auto: 0x0000020900000080 [ 173.209235] arm-smmu-v3 arm-smmu-v3.1.auto: 0x00000000f47cf000 [ 173.217918] arm-smmu-v3 arm-smmu-v3.1.auto: 0x00000000f47cf000 This is because the hw will periodically refresh the qpc cache until the next reset. This patch fixed it by removing the action that release qpc memory in the 'hns_roce_qp_free' function. Fixes: 9a4435375cd1 ("IB/hns: Add driver files for hns RoCE driver") Signed-off-by: wangxi Signed-off-by: Xi Wang Reviewed-by: liuyixian Reviewed-by: Xie XiuQi Signed-off-by: Yang Yingliang --- drivers/infiniband/hw/hns/hns_roce_qp.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/infiniband/hw/hns/hns_roce_qp.c b/drivers/infiniband/hw/hns/hns_roce_qp.c index 91a722b67936..b8eb1450f173 100644 --- a/drivers/infiniband/hw/hns/hns_roce_qp.c +++ b/drivers/infiniband/hw/hns/hns_roce_qp.c @@ -319,7 +319,6 @@ void hns_roce_qp_free(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp) hns_roce_table_put(hr_dev, &qp_table->trrl_table, hr_qp->qpn); hns_roce_table_put(hr_dev, &qp_table->irrl_table, hr_qp->qpn); - hns_roce_table_put(hr_dev, &qp_table->qp_table, hr_qp->qpn); } } EXPORT_SYMBOL_GPL(hns_roce_qp_free); -- GitLab