From: Guojia Liao Date: Sat, 4 Jan 2020 02:49:29 +0000 (+0800) Subject: net: hns3: add protection when get SFP speed as 0 X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=2af8cb6126f36ffad848d1b0af714c09eb801b9d;p=openwrt%2Fstaging%2Fblogic.git net: hns3: add protection when get SFP speed as 0 In some case, the MAC speed get from hardware maybe 0, it should not be set to mac->speed. Signed-off-by: Guojia Liao Signed-off-by: Huazhong Tan Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c index 4a15510a4bab..8bddda7f9092 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c @@ -2835,6 +2835,12 @@ static int hclge_get_sfp_info(struct hclge_dev *hdev, struct hclge_mac *mac) return ret; } + /* In some case, mac speed get from IMP may be 0, it shouldn't be + * set to mac->speed. + */ + if (!le32_to_cpu(resp->speed)) + return 0; + mac->speed = le32_to_cpu(resp->speed); /* if resp->speed_ability is 0, it means it's an old version * firmware, do not update these params