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Date: Sat, 10 Mar 2018 11:29:32 +0800 From: Peng Li <lipeng321@...wei.com> To: <davem@...emloft.net> CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linuxarm@...wei.com>, <salil.mehta@...wei.com>, <lipeng321@...wei.com> Subject: [PATCH net-next 11/12] net: hns3: add existence checking before adding unicast mac address From: Jian Shen <shenjian15@...wei.com> It's not allowed to add two same unicast mac address entries to the mac_vlan table. When modify the uc mac address of a VF device to the same value with the PF device's, the PF device will lose its entry of the mac_vlan table. Lookup the mac address in the mac_vlan table, and add it if the entry is inexistent. Fixes: 46a3df9f9718 ("net: hns3: Add HNS3 Acceleration Engine & Compatibility Layer Support") Signed-off-by: Jian Shen <shenjian15@...wei.com> Signed-off-by: Peng Li <lipeng321@...wei.com> --- drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c index 47dcc98..d70619b 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c @@ -4107,6 +4107,7 @@ int hclge_add_uc_addr_common(struct hclge_vport *vport, { struct hclge_dev *hdev = vport->back; struct hclge_mac_vlan_tbl_entry_cmd req; + struct hclge_desc desc; u16 egress_port = 0; int ret; @@ -4140,7 +4141,21 @@ int hclge_add_uc_addr_common(struct hclge_vport *vport, hclge_prepare_mac_addr(&req, addr); - ret = hclge_add_mac_vlan_tbl(vport, &req, NULL); + /* Lookup the mac address in the mac_vlan table, and add + * it if the entry is inexistent. Repeated unicast entry + * is not allowed in the mac vlan table. + */ + ret = hclge_lookup_mac_vlan_tbl(vport, &req, &desc, false); + if (ret == -ENOENT) + return hclge_add_mac_vlan_tbl(vport, &req, NULL); + + /* check if we just hit the duplicate */ + if (!ret) + ret = -EINVAL; + + dev_err(&hdev->pdev->dev, + "PF failed to add unicast entry(%pM) in the MAC table\n", + addr); return ret; } -- 2.9.3
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