Messages in this thread Patch in this message | | | From | Huazhong Tan <> | Subject | [PATCH V2 net-next 10/12] net: hns3: do not initialize MDIO bus when PHY is inexistent | Date | Sun, 14 Apr 2019 09:47:44 +0800 |
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From: Jian Shen <shenjian15@huawei.com>
For some cases, PHY may not be connected to MDIO bus, then the driver will initialize fail since MDIO bus initialization fails.
This patch fixes it by skipping the MDIO bus initialization when PHY is inexistent.
Signed-off-by: Jian Shen <shenjian15@huawei.com> Signed-off-by: Peng Li <lipeng321@huawei.com> Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com> --- drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mdio.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mdio.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mdio.c index 48eda2c..12be4e2 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mdio.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mdio.c @@ -121,12 +121,18 @@ static int hclge_mdio_read(struct mii_bus *bus, int phyid, int regnum) int hclge_mac_mdio_config(struct hclge_dev *hdev) { +#define PHY_INEXISTENT 255 + struct hclge_mac *mac = &hdev->hw.mac; struct phy_device *phydev; struct mii_bus *mdio_bus; int ret; - if (hdev->hw.mac.phy_addr >= PHY_MAX_ADDR) { + if (hdev->hw.mac.phy_addr == PHY_INEXISTENT) { + dev_info(&hdev->pdev->dev, + "no phy device is connected to mdio bus\n"); + return 0; + } else if (hdev->hw.mac.phy_addr >= PHY_MAX_ADDR) { dev_err(&hdev->pdev->dev, "phy_addr(%d) is too large.\n", hdev->hw.mac.phy_addr); return -EINVAL; -- 2.7.4
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