linux-kernel - [PATCH] net: thunderx: start phy before starting autonegotiation

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Date:   Wed,  4 Dec 2019 16:26:51 +0100
From:   Mian Yousaf Kaukab <ykaukab@...e.de>
To:     netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        tharvey@...eworks.com, davem@...emloft.net, rric@...nel.org,
        sgoutham@...ium.com, Mian Yousaf Kaukab <ykaukab@...e.de>
Subject: [PATCH] net: thunderx: start phy before starting autonegotiation

Since "2b3e88ea6528 net: phy: improve phy state checking"
phy_start_aneg() expects phy state to be >= PHY_UP. Call phy_start()
before calling phy_start_aneg() during probe so that autonegotiation
is initiated.

Network fails without this patch on Octeon TX.

Signed-off-by: Mian Yousaf Kaukab <ykaukab@...e.de>
---
 drivers/net/ethernet/cavium/thunder/thunder_bgx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
index 1e09fdb63c4f..504644257aff 100644
--- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
+++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
@@ -1115,6 +1115,7 @@ static int bgx_lmac_enable(struct bgx *bgx, u8 lmacid)
 				       phy_interface_mode(lmac->lmac_type)))
 			return -ENODEV;
 
+		phy_start(lmac->phydev);
 		phy_start_aneg(lmac->phydev);
 		return 0;
 	}
-- 
2.16.4