This is a note to let you know that I've just added the patch titled
gianfar: Disable EEE autoneg by default
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
gianfar-disable-eee-autoneg-by-default.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Fri Feb 23 11:48:40 CET 2018
From: Claudiu Manoil <claudiu.manoil@xxxxxxx>
Date: Thu, 7 Dec 2017 18:44:23 +0200
Subject: gianfar: Disable EEE autoneg by default
From: Claudiu Manoil <claudiu.manoil@xxxxxxx>
[ Upstream commit b6b5e8a691185606dfffff3198c89e3b4fd9d4f6 ]
This controller does not support EEE, but it may connect to a PHY
which supports EEE and advertises EEE by default, while its link
partner also advertises EEE. If this happens, the PHY enters low
power mode when the traffic rate is low and causes packet loss.
This patch disables EEE advertisement by default for any PHY that
gianfar connects to, to prevent the above unwanted outcome.
Signed-off-by: Shaohui Xie <Shaohui.Xie@xxxxxxx>
Tested-by: Yangbo Lu <Yangbo.lu@xxxxxxx>
Signed-off-by: Claudiu Manoil <claudiu.manoil@xxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/freescale/gianfar.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -1789,6 +1789,7 @@ static int init_phy(struct net_device *d
GFAR_SUPPORTED_GBIT : 0;
phy_interface_t interface;
struct phy_device *phydev;
+ struct ethtool_eee edata;
priv->oldlink = 0;
priv->oldspeed = 0;
@@ -1813,6 +1814,10 @@ static int init_phy(struct net_device *d
/* Add support for flow control, but don't advertise it by default */
phydev->supported |= (SUPPORTED_Pause | SUPPORTED_Asym_Pause);
+ /* disable EEE autoneg, EEE not supported by eTSEC */
+ memset(&edata, 0, sizeof(struct ethtool_eee));
+ phy_ethtool_set_eee(phydev, &edata);
+
return 0;
}
Patches currently in stable-queue which might be from claudiu.manoil@xxxxxxx are
queue-4.9/gianfar-disable-eee-autoneg-by-default.patch