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net: hns3: add protection when get SFP speed as 0

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In some case, the MAC speed get from hardware maybe 0, it should
not be set to mac->speed.

Signed-off-by: Guojia Liao <liaoguojia@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Guojia Liao 2020-01-04 10:49:29 +08:00 committed by David S. Miller
parent f97c4d823f
commit 2af8cb6126
1 changed files with 6 additions and 0 deletions
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6
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
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@ -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