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From: Guangbin Huang <huangguangbin2@huawei.com>
To: <davem@davemloft.net>, <kuba@kernel.org>, <wangjie125@huawei.com>
Cc: <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<lipeng321@huawei.com>, <huangguangbin2@huawei.com>,
	<chenhao288@hisilicon.com>
Subject: [PATCH net 2/4] net: hns3: add check NULL address for page pool
Date: Fri, 26 Nov 2021 20:03:16 +0800	[thread overview]
Message-ID: <20211126120318.33921-3-huangguangbin2@huawei.com> (raw)
In-Reply-To: <20211126120318.33921-1-huangguangbin2@huawei.com>

From: Hao Chen <chenhao288@hisilicon.com>

When page pool is not enabled, its address value is still NULL and page
pool should not be accessed, so add a check for it.

Fixes: 850bfb912a6d ("net: hns3: debugfs add support dumping page pool info")
Signed-off-by: Hao Chen <chenhao288@hisilicon.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
index 67364ab63a1f..fbb8a5f08222 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
@@ -1106,6 +1106,11 @@ hns3_dbg_page_pool_info(struct hnae3_handle *h, char *buf, int len)
 		return -EFAULT;
 	}
 
+	if (!priv->ring[h->kinfo.num_tqps].page_pool) {
+		dev_err(&h->pdev->dev, "page pool is not initialized\n");
+		return -EFAULT;
+	}
+
 	for (i = 0; i < ARRAY_SIZE(page_pool_info_items); i++)
 		result[i] = &data_str[i][0];
 
-- 
2.33.0


  parent reply	other threads:[~2021-11-26 12:10 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-26 12:03 [PATCH net 0/4] net: hns3: add some fixes for -net Guangbin Huang
2021-11-26 12:03 ` [PATCH net 1/4] net: hns3: fix VF RSS failed problem after PF enable multi-TCs Guangbin Huang
2021-11-26 12:03 ` Guangbin Huang [this message]
2021-11-26 12:03 ` [PATCH net 3/4] net: hns3: fix one incorrect value of page pool info when queried by debugfs Guangbin Huang
2021-11-26 12:03 ` [PATCH net 4/4] net: hns3: fix incorrect components info of ethtool --reset command Guangbin Huang
2021-11-26 19:40 ` [PATCH net 0/4] net: hns3: add some fixes for -net patchwork-bot+netdevbpf

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