From: Vladimir Oltean <olteanv@gmail.com>
To: Daniel Golle <daniel@makrotopia.org>
Cc: netdev@vger.kernel.org, linux-mediatek@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
"Russell King" <linux@armlinux.org.uk>,
"Heiner Kallweit" <hkallweit1@gmail.com>,
"Lorenzo Bianconi" <lorenzo@kernel.org>,
"Mark Lee" <Mark-MC.Lee@mediatek.com>,
"John Crispin" <john@phrozen.org>, "Felix Fietkau" <nbd@nbd.name>,
"AngeloGioacchino Del Regno"
<angelogioacchino.delregno@collabora.com>,
"Matthias Brugger" <matthias.bgg@gmail.com>,
"DENG Qingfang" <dqfext@gmail.com>,
"Landen Chao" <Landen.Chao@mediatek.com>,
"Sean Wang" <sean.wang@mediatek.com>,
"Paolo Abeni" <pabeni@redhat.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"Eric Dumazet" <edumazet@google.com>,
"David S. Miller" <davem@davemloft.net>,
"Florian Fainelli" <f.fainelli@gmail.com>,
"Andrew Lunn" <andrew@lunn.ch>,
"Vladimir Oltean" <vladimir.oltean@nxp.com>,
"Bjørn Mork" <bjorn@mork.no>,
arinc9.unal@gmail.com, frank-w@public-files.de
Subject: Re: [PATCH net] net: ethernet: mtk_eth_soc: fix RX data corruption issue
Date: Mon, 6 Mar 2023 14:15:48 +0200 [thread overview]
Message-ID: <20230306121548.k33fgu7adg44zruu@skbuf> (raw)
In-Reply-To: <138da2735f92c8b6f8578ec2e5a794ee515b665f.1677937317.git.daniel@makrotopia.org> <138da2735f92c8b6f8578ec2e5a794ee515b665f.1677937317.git.daniel@makrotopia.org>
On Sat, Mar 04, 2023 at 01:43:20PM +0000, Daniel Golle wrote:
> Fix data corruption issue with SerDes connected PHYs operating at 1.25
> Gbps speed where we could previously observe about 30% packet loss while
> the bad packet counter was increasing.
>
> As almost all boards with MediaTek MT7622 or MT7986 use either the MT7531
> switch IC operating at 3.125Gbps SerDes rate or single-port PHYs using
> rate-adaptation to 2500Base-X mode, this issue only got exposed now when
> we started trying to use SFP modules operating with 1.25 Gbps with the
> BananaPi R3 board.
>
> The fix is to set bit 12 which disables the RX FIFO clear function when
> setting up MAC MCR, MediaTek SDK did the same change stating:
> "If without this patch, kernel might receive invalid packets that are
> corrupted by GMAC."[1]
>
> [1]: https://git01.mediatek.com/plugins/gitiles/openwrt/feeds/mtk-openwrt-feeds/+/d8a2975939a12686c4a95c40db21efdc3f821f63
>
> Fixes: 42c03844e93d ("net-next: mediatek: add support for MediaTek MT7622 SoC")
> Tested-by: Bjørn Mork <bjorn@mork.no>
> Signed-off-by: Daniel Golle <daniel@makrotopia.org>
> ---
I don't see something particularly controversial with this change.
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
next prev parent reply other threads:[~2023-03-06 12:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-04 13:43 [PATCH net] net: ethernet: mtk_eth_soc: fix RX data corruption issue Daniel Golle
2023-03-06 12:15 ` Vladimir Oltean [this message]
2023-03-06 17:31 ` Florian Fainelli
2023-03-06 22:00 ` patchwork-bot+netdevbpf
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