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From 4f83ed07a25427cafd91d3722c08dc7f1f6d185f Mon Sep 17 00:00:00 2001
From: Sudheesh Mavila <sudheesh.mavila@amd.com>
Date: Tue, 12 Jan 2021 15:11:03 +0530
Subject: [PATCH 13/21] amd-xgbe: Fix for Network fluctuations
BEL SFP, when connected to amd-xgbe shows frequent link down and up events on dmesg.
Refer ticket EMBDEV-8951. This fix avoids the frquent link up/down issue.
Signed-off-by: Sudheesh Mavila <sudheesh.mavila@amd.com>
---
drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
index fcb3a06fc70f..59554673c142 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
@@ -1045,6 +1045,18 @@ static int xgbe_phy_find_phy_device(struct xgbe_prv_data *pdata)
}
phy_data->phydev = phydev;
+ switch (phy_data->port_mode) {
+ case XGBE_PORT_MODE_SFP:
+ /* reset the sfp phy EMBDEV-8951 */
+ if(phydev)
+ genphy_soft_reset(phydev);
+ else
+ netdev_err(pdata->netdev, "phy reset failed\n");
+ break;
+ default:
+ break;
+ }
+
xgbe_phy_external_phy_quirks(pdata);
linkmode_and(phydev->advertising, phydev->advertising,
--
2.17.1
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