linux-kernel - [PATCH 4.17 134/324] ARM64: dts: meson-axg: fix ethernet stability issue

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Message-Id: <20180823075002.676024933@linuxfoundation.org>
Date:   Thu, 23 Aug 2018 09:53:20 +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, Jerome Brunet <jbrunet@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.17 134/324] ARM64: dts: meson-axg: fix ethernet stability issue

4.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jerome Brunet <jbrunet@...libre.com>

[ Upstream commit 6d28d577510f1a51f7ffbe830fdbf42077e0058b ]

Like the odroid-c2 and wetek, the s400 uses the RTL8211F and seems to
suffer from the kind of stability issue.

Doing an iperf3 download test, we can see a significant number of LPI
interrupts on the tx path. After a short while (5 to 15 seconds), the
network connection dies. If using rootfs over NFS, the connection may
also break during the boot sequence.

We still don't have a real explanation for this problem so let's disable
EEE once again.

Fixes: f6f6ac914b82 ("ARM64: dts: meson-axg: enable ethernet for A113D S400 board")
Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
Reviewed-by: Neil Armstrong <narmstrong@...libre.com>
Signed-off-by: Kevin Hilman <khilman@...libre.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/arm64/boot/dts/amlogic/meson-axg-s400.dts |   15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

--- a/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
@@ -19,9 +19,22 @@
 
 &ethmac {
 	status = "okay";
-	phy-mode = "rgmii";
 	pinctrl-0 = <&eth_rgmii_y_pins>;
 	pinctrl-names = "default";
+	phy-handle = <&eth_phy0>;
+	phy-mode = "rgmii";
+
+	mdio {
+		compatible = "snps,dwmac-mdio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		eth_phy0: ethernet-phy@0 {
+			/* Realtek RTL8211F (0x001cc916) */
+			reg = <0>;
+			eee-broken-1000t;
+		};
+	};
 };
 
 &uart_A {