linux-kernel - [PATCH net-next 2/4] net: phy: xpcs: Return error upon RX/TX fault

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Message-Id: <7918fdf6bbe6505a64e54ae360c59c905aa3fe1d.1584106347.git.Jose.Abreu@synopsys.com>
Date:   Fri, 13 Mar 2020 14:39:41 +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>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next 2/4] net: phy: xpcs: Return error upon RX/TX fault

RX/TX fault status results in link errors. Return error upon these cases
so that XPCS can be correctly resumed.

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

---
Cc: Jose Abreu <Jose.Abreu@...opsys.com>
Cc: Andrew Lunn <andrew@...n.ch>
Cc: Florian Fainelli <f.fainelli@...il.com>
Cc: Heiner Kallweit <hkallweit1@...il.com>
Cc: Russell King <linux@...linux.org.uk>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: netdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/net/phy/mdio-xpcs.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/mdio-xpcs.c b/drivers/net/phy/mdio-xpcs.c
index a4cbeecc6d42..23516397b982 100644
--- a/drivers/net/phy/mdio-xpcs.c
+++ b/drivers/net/phy/mdio-xpcs.c
@@ -190,10 +190,14 @@ static int xpcs_read_fault(struct mdio_xpcs_args *xpcs,
 	if (ret < 0)
 		return ret;
 
-	if (ret & MDIO_STAT2_RXFAULT)
+	if (ret & MDIO_STAT2_RXFAULT) {
 		xpcs_warn(xpcs, state, "Receiver fault detected!\n");
-	if (ret & MDIO_STAT2_TXFAULT)
+		return -EFAULT;
+	}
+	if (ret & MDIO_STAT2_TXFAULT) {
 		xpcs_warn(xpcs, state, "Transmitter fault detected!\n");
+		return -EFAULT;
+	}
 
 	ret = xpcs_read_vendor(xpcs, MDIO_MMD_PCS, DW_VR_XS_PCS_DIG_STS);
 	if (ret < 0)
-- 
2.7.4