From: Yangyang Li <liyangyang20@huawei.com>
Date: Sat, 19 Sep 2020 18:03:16 +0800
Subject: RDMA/hns: Add interception for resizing SRQs
Patch-mainline: v5.10-rc1
Git-commit: 221109e64316e089b79e604adaec9057e0c4785a
References: jsc#SLE-14777

HIP08 doesn't support modifying the maximum number of outstanding WR in an
SRQ. However, the driver does not return a failure message, and users may
mistakenly think that the resizing is executed successfully. So the driver
needs to intercept this operation.

Fixes: ffb1308b88b6 ("RDMA/hns: Move SRQ code to the reasonable place")
Link: https://lore.kernel.org/r/1600509802-44382-3-git-send-email-liweihang@huawei.com
Signed-off-by: Yangyang Li <liyangyang20@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/hns/hns_roce_hw_v2.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -5004,6 +5004,10 @@ static int hns_roce_v2_modify_srq(struct
 	struct hns_roce_cmd_mailbox *mailbox;
 	int ret;
 
+	/* Resizing SRQs is not supported yet */
+	if (srq_attr_mask & IB_SRQ_MAX_WR)
+		return -EINVAL;
+
 	if (srq_attr_mask & IB_SRQ_LIMIT) {
 		if (srq_attr->srq_limit >= srq->wqe_cnt)
 			return -EINVAL;