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[for-next,7/8] RDMA/hns: Fixs hw access invalid dma memory error

Message ID 1561376872-111496-8-git-send-email-oulijun@huawei.com (mailing list archive)
State Accepted
Delegated to: Jason Gunthorpe
Headers show
Series Some fixes from hns | expand

Commit Message

Lijun Ou June 24, 2019, 11:47 a.m. UTC 
From: Xi Wang <wangxi11@huawei.com>

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: Xi Wang <wangxi11@huawei.com>
---
 drivers/infiniband/hw/hns/hns_roce_qp.c | 1 -
 1 file changed, 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/infiniband/hw/hns/hns_roce_qp.c b/drivers/infiniband/hw/hns/hns_roce_qp.c
index d56c03d..9320773 100644
--- a/drivers/infiniband/hw/hns/hns_roce_qp.c
+++ b/drivers/infiniband/hw/hns/hns_roce_qp.c
@@ -257,7 +257,6 @@  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);