linux-kernel - [PATCH][next] net: hns3: Fix return of uninitialized variable ret

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Message-Id: <20210521100146.42980-1-colin.king@canonical.com>
Date:   Fri, 21 May 2021 11:01:46 +0100
From:   Colin King <colin.king@...onical.com>
To:     Yisen Zhuang <yisen.zhuang@...wei.com>,
        Salil Mehta <salil.mehta@...wei.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Huazhong Tan <tanhuazhong@...wei.com>,
        Hao Chen <chenhao288@...ilicon.com>, netdev@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] net: hns3: Fix return of uninitialized variable ret

From: Colin Ian King <colin.king@...onical.com>

In the unlikely event that rule_cnt is zero the variable ret is
not assigned a value and function hclge_dbg_dump_fd_tcam can end
up returning an unitialized value in ret. Fix this by explicitly
setting ret to zero before the for-loop.

Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: b5a0b70d77b9 ("net: hns3: refactor dump fd tcam of debugfs")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c
index dd9eb6e6f5a7..0b7c6838d905 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c
@@ -1519,6 +1519,7 @@ static int hclge_dbg_dump_fd_tcam(struct hclge_dev *hdev, char *buf, int len)
 		goto out;
 	}
 
+	ret = 0;
 	for (i = 0; i < rule_cnt; i++) {
 		tcam_msg.stage = HCLGE_FD_STAGE_1;
 		tcam_msg.loc = rule_locs[i];
-- 
2.31.1