linux-kernel - [RFC net-next 1/8] net: stmmac: selftests: Do not fail if PHY is not attached

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Date:   Mon, 27 Jan 2020 12:09:06 +0100
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     netdev@...r.kernel.org
Cc:     Joao Pinto <Joao.Pinto@...opsys.com>,
        Jose Abreu <Jose.Abreu@...opsys.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Jose Abreu <Jose.Abreu@...opsys.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [RFC net-next 1/8] net: stmmac: selftests: Do not fail if PHY is not attached

If a PHY is not attached, we can still run the tests with MAC loopback
mode. Return -EOPNOTSUPP error code in PHY loopback test so that global
status is not a failure.

Signed-off-by: Jose Abreu <Jose.Abreu@...opsys.com>

---
Cc: Giuseppe Cavallaro <peppe.cavallaro@...com>
Cc: Alexandre Torgue <alexandre.torgue@...com>
Cc: Jose Abreu <joabreu@...opsys.com>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Jakub Kicinski <kuba@...nel.org>
Cc: Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc: Russell King <linux@...linux.org.uk>
Cc: Andrew Lunn <andrew@...n.ch>
Cc: Florian Fainelli <f.fainelli@...il.com>
Cc: Heiner Kallweit <hkallweit1@...il.com>
Cc: netdev@...r.kernel.org
Cc: linux-stm32@...md-mailman.stormreply.com
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
index 2aba2673d6c3..586a657be984 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
@@ -380,7 +380,7 @@ static int stmmac_test_phy_loopback(struct stmmac_priv *priv)
 	int ret;
 
 	if (!priv->dev->phydev)
-		return -EBUSY;
+		return -EOPNOTSUPP;
 
 	ret = phy_loopback(priv->dev->phydev, true);
 	if (ret)
-- 
2.7.4