linux-kernel - [PATCH AUTOSEL for 4.14 62/97] net: hns3: Fix a loop index error of tqp statistics query

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Message-ID: <20180319155411.12348-62-alexander.levin@microsoft.com>
Date:   Mon, 19 Mar 2018 15:55:51 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
CC:     Jian Shen <shenjian15@...wei.com>, Peng Li <lipeng321@...wei.com>,
        "David S . Miller" <davem@...emloft.net>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL for 4.14 62/97] net: hns3: Fix a loop index error of
 tqp statistics query

From: Jian Shen <shenjian15@...wei.com>

[ Upstream commit 94bfaafac9d2a3c0bcca00d01e38f7597b741799 ]

An error loop index was used while querying statistics data
of tqps, which may cause call trace.

Fixes: 496d03e960ae ("net: hns3: Add Ethtool support to HNS3 driver")
Signed-off-by: Jian Shen <shenjian15@...wei.com>
Signed-off-by: Peng Li <lipeng321@...wei.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c
index e590d96e434a..43ed4bc9e456 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c
@@ -189,13 +189,13 @@ static u64 *hns3_get_stats_tqps(struct hnae3_handle *handle, u64 *data)
 	struct hnae3_knic_private_info *kinfo = &handle->kinfo;
 	struct hns3_enet_ring *ring;
 	u8 *stat;
-	u32 i;
+	int i, j;
 
 	/* get stats for Tx */
 	for (i = 0; i < kinfo->num_tqps; i++) {
 		ring = nic_priv->ring_data[i].ring;
-		for (i = 0; i < HNS3_TXQ_STATS_COUNT; i++) {
-			stat = (u8 *)ring + hns3_txq_stats[i].stats_offset;
+		for (j = 0; j < HNS3_TXQ_STATS_COUNT; j++) {
+			stat = (u8 *)ring + hns3_txq_stats[j].stats_offset;
 			*data++ = *(u64 *)stat;
 		}
 	}
@@ -203,8 +203,8 @@ static u64 *hns3_get_stats_tqps(struct hnae3_handle *handle, u64 *data)
 	/* get stats for Rx */
 	for (i = 0; i < kinfo->num_tqps; i++) {
 		ring = nic_priv->ring_data[i + kinfo->num_tqps].ring;
-		for (i = 0; i < HNS3_RXQ_STATS_COUNT; i++) {
-			stat = (u8 *)ring + hns3_rxq_stats[i].stats_offset;
+		for (j = 0; j < HNS3_RXQ_STATS_COUNT; j++) {
+			stat = (u8 *)ring + hns3_rxq_stats[j].stats_offset;
 			*data++ = *(u64 *)stat;
 		}
 	}
-- 
2.14.1