linux-kernel - [PATCH v2][next] RDMA/hns: Fix uninitialized variable bug

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Date:   Fri, 27 Mar 2020 21:35:39 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Lijun Ou <oulijun@...wei.com>,
        "Wei Hu(Xavier)" <huwei87@...ilicon.com>,
        Weihang Li <liweihang@...wei.com>,
        Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...pe.ca>, Xi Wang <wangxi11@...wei.com>
Cc:     linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: [PATCH v2][next] RDMA/hns: Fix uninitialized variable bug

There is a potential execution path in which variable *ret* is returned
without being properly initialized, previously.

Fix this by initializing variable *ret* to 0.

Addresses-Coverity-ID: 1491917 ("Uninitialized scalar variable")
Fixes: 2f49de21f3e9 ("RDMA/hns: Optimize mhop get flow for multi-hop addressing")
Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
Changes in v2:
 - Set ret to 0 instead of -ENODEV. Thanks Weihang Li, for the feedback.

 drivers/infiniband/hw/hns/hns_roce_hem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/hns/hns_roce_hem.c b/drivers/infiniband/hw/hns/hns_roce_hem.c
index c96378718f88..263338b90d7a 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hem.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hem.c
@@ -603,7 +603,7 @@ static int set_mhop_hem(struct hns_roce_dev *hr_dev,
 {
 	struct ib_device *ibdev = &hr_dev->ib_dev;
 	int step_idx;
-	int ret;
+	int ret = 0;
 
 	if (index->inited & HEM_INDEX_L0) {
 		ret = hr_dev->hw->set_hem(hr_dev, table, obj, 0);
-- 
2.26.0