[PATCH net 4/5] net: hns3: differentiate autoneg default values between copper and fiber

[Jijie Shao]

From: Shuaisong Yang <yangshuaisong@xxxxxxxxxxxxxx>

Fix a link loss issue during driver initialization on optical ports
connected to forced-mode (non-autoneg) remote switches.

Previously, during driver probe or initialization, hclge_configure()
blindly hardcoded hdev->hw.mac.req_autoneg to AUTONEG_ENABLE for all
media types. While this is necessary for copper (BASE-T) ports to
establish a link, many high-speed optical (fiber) ports in data
centers are connected to switches running in forced mode (fixed speed,
autoneg disabled). Forcing autoneg on these optical ports during
initialization causes a permanent link failure since the remote end
refuses to respond to autoneg pulses.

Fix this by implementing media-type differentiated initialization in
hclge_init_ae_dev(). Copper ports continue to default to
AUTONEG_ENABLE, while optical ports strictly inherit the preset
autoneg status pre-configured by the firmware (hdev->hw.mac.autoneg),
preserving native compatibility with forced-mode network environments.

Fixes: 05eb60e9648c ("net: hns3: using user configure after hardware reset")
Signed-off-by: Shuaisong Yang <yangshuaisong@xxxxxxxxxxxxxx>
Signed-off-by: Jijie Shao <shaojijie@xxxxxxxxxx>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 63e7b7458de0..853e97b0b6ff 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -11916,6 +11916,9 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
 	if (ret)
 		goto err_ptp_uninit;
 
+	if (hdev->hw.mac.media_type != HNAE3_MEDIA_TYPE_COPPER)
+		hdev->hw.mac.req_autoneg = hdev->hw.mac.autoneg;
+
 	ret = hclge_set_autoneg_speed_dup(hdev);
 	if (ret) {
 		dev_err(&pdev->dev,
-- 
2.33.0