From 10534f0ef2ca73e8e59a38e51969cae864f9fbbf Mon Sep 17 00:00:00 2001
From: wenglianfa <wenglianfa@huawei.com>
Date: Thu, 13 Mar 2025 17:26:51 +0800
Subject: [PATCH 54/55] libhns: Fix wrong max inline data value

mainline inclusion
from mainline-v56.0-65
commit 8307b7c54ed81c343ec874e2066de79260b666d2
category: bugfix
bugzilla: https://gitee.com/src-openeuler/rdma-core/issues/IC1V44
CVE: NA

Reference: https://github.com/linux-rdma/rdma-core/pull/1579/commits/8307b7c54ed81c343e...

---------------------------------------------------------------------

When cap.max_inline_data is 0, it will be modified to 1 since
roundup_pow_of_two(0) == 1, which violates users' expectations.
Here fix it.

Fixes: 2aff0d55098c ("libhns: Fix the problem of sge nums")
Signed-off-by: wenglianfa <wenglianfa@huawei.com>
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
Signed-off-by: Xinghai Cen <cenxinghai@h-partners.com>
---
 providers/hns/hns_roce_u_verbs.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/providers/hns/hns_roce_u_verbs.c b/providers/hns/hns_roce_u_verbs.c
index f0098ed..5fe169e 100644
--- a/providers/hns/hns_roce_u_verbs.c
+++ b/providers/hns/hns_roce_u_verbs.c
@@ -1494,6 +1494,16 @@ static unsigned int get_sge_num_from_max_inl_data(bool is_ud,
 	return inline_sge;
 }
 
+static uint32_t get_max_inline_data(struct hns_roce_context *ctx,
+				    struct ibv_qp_cap *cap)
+{
+	if (cap->max_inline_data)
+		return min_t(uint32_t, roundup_pow_of_two(cap->max_inline_data),
+			     ctx->max_inline_data);
+
+	return 0;
+}
+
 static void set_ext_sge_param(struct hns_roce_context *ctx,
 			      struct ibv_qp_init_attr_ex *attr,
 			      struct hns_roce_qp *qp, unsigned int wr_cnt)
@@ -1510,9 +1520,7 @@ static void set_ext_sge_param(struct hns_roce_context *ctx,
 							attr->cap.max_send_sge);
 
 	if (ctx->config & HNS_ROCE_RSP_EXSGE_FLAGS) {
-		attr->cap.max_inline_data = min_t(uint32_t, roundup_pow_of_two(
-						  attr->cap.max_inline_data),
-						  ctx->max_inline_data);
+		attr->cap.max_inline_data = get_max_inline_data(ctx, &attr->cap);
 
 		inline_ext_sge = max(ext_wqe_sge_cnt,
 				     get_sge_num_from_max_inl_data(is_ud,
-- 
2.33.0