linux-kernel - [PATCH 5.4 059/215] net: ethernet: mvneta: Do not error out in non serdes modes

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Date:   Mon, 20 Jul 2020 17:35:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sascha Hauer <s.hauer@...gutronix.de>,
        Russell King <rmk+kernel@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 059/215] net: ethernet: mvneta: Do not error out in non serdes modes

From: Sascha Hauer <s.hauer@...gutronix.de>

[ Upstream commit d3d239dcb8aae6d7b10642d292b404e57604f7ea ]

In mvneta_config_interface() the RGMII modes are catched by the default
case which is an error return. The RGMII modes are valid modes for the
driver, so instead of returning an error add a break statement to return
successfully.

This avoids this warning for non comphy SoCs which use RGMII, like
SolidRun Clearfog:

WARNING: CPU: 0 PID: 268 at drivers/net/ethernet/marvell/mvneta.c:3512 mvneta_start_dev+0x220/0x23c

Fixes: b4748553f53f ("net: ethernet: mvneta: Fix Serdes configuration for SoCs without comphy")
Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
Reviewed-by: Russell King <rmk+kernel@...linux.org.uk>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/marvell/mvneta.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index ffdb7b113f172..d443cd19e8951 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -3206,7 +3206,7 @@ static int mvneta_config_interface(struct mvneta_port *pp,
 				    MVNETA_HSGMII_SERDES_PROTO);
 			break;
 		default:
-			return -EINVAL;
+			break;
 		}
 	}
 
-- 
2.25.1