linux-kernel - [PATCH net v2] net: thunderx: start phy before starting autonegotiation

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Date:   Thu,  5 Dec 2019 10:41:16 +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, sergei.shtylyov@...entembedded.com,
        andrew@...n.ch, Mian Yousaf Kaukab <ykaukab@...e.de>
Subject: [PATCH net v2] net: thunderx: start phy before starting autonegotiation

Since commit 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.

As phy_start() takes care of calling phy_start_aneg(), drop the explicit
call to phy_start_aneg().

Network fails without this patch on Octeon TX.

Fixes: 2b3e88ea6528 ("net: phy: improve phy state checking")
Signed-off-by: Mian Yousaf Kaukab <ykaukab@...e.de>
---
v2:
-Add fixes tag and net tree as suggested by Andrew Lunn
v1:
-Remove call to phy_start_aneg() as suggested by Andrew Lunn
-Fix reference to patch in change log as suggested by Sergei Shtylyov

 drivers/net/ethernet/cavium/thunder/thunder_bgx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
index 1e09fdb63c4f..c4f6ec0cd183 100644
--- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
+++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
@@ -1115,7 +1115,7 @@ static int bgx_lmac_enable(struct bgx *bgx, u8 lmacid)
 				       phy_interface_mode(lmac->lmac_type)))
 			return -ENODEV;
 
-		phy_start_aneg(lmac->phydev);
+		phy_start(lmac->phydev);
 		return 0;
 	}
 
-- 
2.16.4