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From: "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com>
To: Jerome Brunet <jbrunet@baylibre.com>
CC: "stable@vger.kernel.org" <stable@vger.kernel.org>,
        Kevin Hilman <khilman@baylibre.com>,
        Arnd Bergmann <arnd@arndb.de>
Subject: Re: [PATCH for v4.9 LTS 064/111] ARM64: dts: meson-gxbb-odroidc2: fix
 GbE tx link breakage
Date: Sun, 11 Jun 2017 14:31:06 +0000
Message-ID: <20170611143119.2ifddumkuk7hxbyl@sasha-lappy>
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On Sun, Jun 04, 2017 at 10:45:49PM +0200, Jerome Brunet wrote:
> On Sun, 2017-06-04 at 08:12 +0000, Levin, Alexander (Sasha Levin) wrote:
> > From: Jerome Brunet <jbrunet@baylibre.com>
> >=20
> > [ Upstream commit feb3cbea0946c67060e2d5bcb7499b0a6f6700fe ]
> >=20
> > OdroidC2 GbE link breaks under heavy tx transfer. This happens even if =
the
> > MAC does not enable Energy Efficient Ethernet (No Low Power state Idle =
on
> > the Tx path). The problem seems to come from the phy Rx path, entering =
the
> > LPI state.
> >=20
> > Disabling EEE advertisement on the phy prevent this feature to be
> > negociated with the link partner and solve the issue.
> >=20
> > Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
> > Signed-off-by: Kevin Hilman <khilman@baylibre.com>
> > Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> > Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
>=20
> Alexander,
>=20
> unfortunately, this dt change alone won't fix the problem. The code relat=
ed to
> eee-broken-**** has been merged into mainline around the same time as thi=
s
> particular change.
>=20
> For this flag to actually do something you'll need the following commits:
>=20
> d853d145ea3e63387a2ac759aa41d5e43876e561
> 1fc31357ad194fb98691f3d122bcd47e59239e83
> 3bb9ab63276696988d8224f52db20e87194deb4b
> 57f3986231bb2c69a55ccab1d2b30a00818027ac
> 308d3165d8b2b98d3dc3d97d6662062735daea67

Thanks, Jerome!

--=20

Thanks,
Sasha=