From: Yangyang Li <liyangyang20@huawei.com>
Date: Sun, 7 Apr 2019 13:23:39 +0800
Subject: RDMA/hns: Bugfix for SCC hem free
Patch-mainline: v5.1-rc5
Git-commit: 00fb67ec6b98114a887d9ef26fc7c3e566e7f665
References: bsc#1104427 FATE#326416 bsc#1137236

The method of hem free for SCC context is different from qp context.

In the current version, if free SCC hem during the execution of qp free,
there may be smmu error as below:

 arm-smmu-v3 arm-smmu-v3.1.auto: event 0x10 received:
 arm-smmu-v3 arm-smmu-v3.1.auto:  0x00007d0000000010
 arm-smmu-v3 arm-smmu-v3.1.auto:  0x000012000000017c
 arm-smmu-v3 arm-smmu-v3.1.auto:  0x00000000000009e0
 arm-smmu-v3 arm-smmu-v3.1.auto:  0x0000000000000000

As SCC context is still used by hardware after qp free, we can solve this
problem by removing SCC hem free from hns_roce_qp_free.

Fixes: 6a157f7d1b14 ("RDMA/hns: Add SCC context allocation support for hip08")
Signed-off-by: Yangyang Li <liyangyang20@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/hns/hns_roce_qp.c |    3 ---
 1 file changed, 3 deletions(-)

--- a/drivers/infiniband/hw/hns/hns_roce_qp.c
+++ b/drivers/infiniband/hw/hns/hns_roce_qp.c
@@ -273,9 +273,6 @@ void hns_roce_qp_free(struct hns_roce_de
 	wait_for_completion(&hr_qp->free);
 
 	if ((hr_qp->ibqp.qp_type) != IB_QPT_GSI) {
-		if (hr_dev->caps.sccc_entry_sz)
-			hns_roce_table_put(hr_dev, &qp_table->sccc_table,
-					   hr_qp->qpn);
 		if (hr_dev->caps.trrl_entry_sz)
 			hns_roce_table_put(hr_dev, &qp_table->trrl_table,
 					   hr_qp->qpn);