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From: Kurt Kanzenbach <kurt@linutronix.de>
To: Tan Tee Min <tee.min.tan@linux.intel.com>,
	Giuseppe Cavallaro <peppe.cavallaro@st.com>,
	Alexandre Torgue <alexandre.torgue@foss.st.com>,
	Jose Abreu <joabreu@synopsys.com>,
	"David S . Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	Michael Sit Wei Hong <michael.wei.hong.sit@intel.com>,
	Xiaoliang Yang <xiaoliang.yang_1@nxp.com>,
	Wong Vee Khee <vee.khee.wong@linux.intel.com>,
	Tan Tee Min <tee.min.tan@linux.intel.com>,
	Ling Pei Lee <pei.lee.ling@intel.com>,
	Bhupesh Sharma <bhupesh.sharma@linaro.org>
Cc: netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, stable@vger.kernel.org,
	Voon Wei Feng <weifeng.voon@intel.com>,
	Song Yoong Siang <yoong.siang.song@intel.com>,
	Ong@vger.kernel.org, Boon Leong <boon.leong.ong@intel.com>,
	Tan Tee Min <tee.min.tan@intel.com>
Subject: Re: [PATCH net 1/1] net: stmmac: disable Split Header (SPH) for Intel platforms
Date: Tue, 26 Apr 2022 15:58:56 +0200	[thread overview]
Message-ID: <8735i0ndy7.fsf@kurt> (raw)
In-Reply-To: <20220426074531.4115683-1-tee.min.tan@linux.intel.com>


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Hi,

On Tue Apr 26 2022, Tan Tee Min wrote:
> Based on DesignWare Ethernet QoS datasheet, we are seeing the limitation
> of Split Header (SPH) feature is not supported for Ipv4 fragmented packet.
> This SPH limitation will cause ping failure when the packets size exceed
> the MTU size. For example, the issue happens once the basic ping packet
> size is larger than the configured MTU size and the data is lost inside
> the fragmented packet, replaced by zeros/corrupted values, and leads to
> ping fail.
>
> So, disable the Split Header for Intel platforms.

Does this issue only apply on Intel platforms?

Thanks,
Kurt

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WARNING: multiple messages have this Message-ID (diff)
From: Kurt Kanzenbach <kurt@linutronix.de>
To: Tan Tee Min <tee.min.tan@linux.intel.com>,
	Giuseppe Cavallaro <peppe.cavallaro@st.com>,
	Alexandre Torgue <alexandre.torgue@foss.st.com>,
	Jose Abreu <joabreu@synopsys.com>,
	"David S . Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	Michael Sit Wei Hong <michael.wei.hong.sit@intel.com>,
	Xiaoliang Yang <xiaoliang.yang_1@nxp.com>,
	Wong Vee Khee <vee.khee.wong@linux.intel.com>,
	Tan Tee Min <tee.min.tan@linux.intel.com>,
	Ling Pei Lee <pei.lee.ling@intel.com>,
	Bhupesh Sharma <bhupesh.sharma@linaro.org>
Cc: netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, stable@vger.kernel.org,
	Voon Wei Feng <weifeng.voon@intel.com>,
	Song Yoong Siang <yoong.siang.song@intel.com>,
	Ong@vger.kernel.org, Boon Leong <boon.leong.ong@intel.com>,
	Tan Tee Min <tee.min.tan@intel.com>
Subject: Re: [PATCH net 1/1] net: stmmac: disable Split Header (SPH) for Intel platforms
Date: Tue, 26 Apr 2022 15:58:56 +0200	[thread overview]
Message-ID: <8735i0ndy7.fsf@kurt> (raw)
In-Reply-To: <20220426074531.4115683-1-tee.min.tan@linux.intel.com>

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Hi,

On Tue Apr 26 2022, Tan Tee Min wrote:
> Based on DesignWare Ethernet QoS datasheet, we are seeing the limitation
> of Split Header (SPH) feature is not supported for Ipv4 fragmented packet.
> This SPH limitation will cause ping failure when the packets size exceed
> the MTU size. For example, the issue happens once the basic ping packet
> size is larger than the configured MTU size and the data is lost inside
> the fragmented packet, replaced by zeros/corrupted values, and leads to
> ping fail.
>
> So, disable the Split Header for Intel platforms.

Does this issue only apply on Intel platforms?

Thanks,
Kurt

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  reply	other threads:[~2022-04-26 14:04 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-26  7:45 [PATCH net 1/1] net: stmmac: disable Split Header (SPH) for Intel platforms Tan Tee Min
2022-04-26 13:58 ` Kurt Kanzenbach [this message]
2022-04-26 13:58   ` Kurt Kanzenbach
2022-04-28  1:55   ` Tan Tee Min
2022-04-28  1:55     ` Tan Tee Min
2022-04-28  7:05     ` Paolo Abeni
2022-04-28  7:05       ` Paolo Abeni

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