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[net,3/3] net: hns3: add check for HNS3_NIC_STATE_INITED in hns3_reset_notify_up_enet()

Message ID 1619685292-46644-4-git-send-email-tanhuazhong@huawei.com (mailing list archive)
State Accepted
Commit b4047aac4ec1066bab6c71950623746d7bcf7154
Delegated to: Netdev Maintainers
Headers show
Series net: hns3: add some fixes for -net | expand

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netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 11 lines checked
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Commit Message

Huazhong Tan April 29, 2021, 8:34 a.m. UTC 
From: Jian Shen <shenjian15@huawei.com>

In some cases, the device is not initialized because reset failed.
If another task calls hns3_reset_notify_up_enet() before reset
retry, it will cause an error since uninitialized pointer access.
So add check for HNS3_NIC_STATE_INITED before calling
hns3_nic_net_open() in hns3_reset_notify_up_enet().

Fixes: bb6b94a896d4 ("net: hns3: Add reset interface implementation in client")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index bf4302a..22ce73e 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -4554,6 +4554,11 @@  static int hns3_reset_notify_up_enet(struct hnae3_handle *handle)
 	struct hns3_nic_priv *priv = netdev_priv(kinfo->netdev);
 	int ret = 0;
 
+	if (!test_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
+		netdev_err(kinfo->netdev, "device is not initialized yet\n");
+		return -EFAULT;
+	}
+
 	clear_bit(HNS3_NIC_STATE_RESETTING, &priv->state);
 
 	if (netif_running(kinfo->netdev)) {