From: Andrew Lunn <andrew@lunn.ch>
To: rohan.g.thomas@altera.com
Cc: Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>,
Richard Cochran <richardcochran@gmail.com>,
Jose Abreu <Jose.Abreu@synopsys.com>,
Fugang Duan <fugang.duan@nxp.com>,
Kurt Kanzenbach <kurt@linutronix.de>,
netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next] net: stmmac: Fix E2E delay mechanism
Date: Tue, 25 Nov 2025 17:26:43 +0100 [thread overview]
Message-ID: <e721d2d5-73cc-4c32-b99c-55f0fb625563@lunn.ch> (raw)
In-Reply-To: <20251125-ext-ptp-fix-v1-1-83f9f069cb36@altera.com>
On Tue, Nov 25, 2025 at 10:50:02PM +0800, Rohan G Thomas via B4 Relay wrote:
> From: Rohan G Thomas <rohan.g.thomas@altera.com>
>
> For E2E delay mechanism, "received DELAY_REQ without timestamp" error
> messages shows up for dwmac v3.70+ and dwxgmac IPs.
>
> This issue affects socfpga platforms, Agilex7 (dwmac 3.70) and
> Agilex5 (dwxgmac). According to the databook, to enable timestamping
> for all events, the SNAPTYPSEL bit in the MAC_Timestamp_Control
> register must be set to 2'b00, and the TSEVNTENA bit must be cleared
> to 0'b0.
>
> Commit 3cb958027cb8 ("net: stmmac: Fix E2E delay mechanism") already
> addresses this problem for all dwmacs above version v4.10. However,
> same holds true for v3.70 and above, as well as for dwxgmac. Updates
> the check accordingly.
>
> Fixes: 14f347334bf2 ("net: stmmac: Correctly take timestamp for PTPv2")
> Fixes: f2fb6b6275eb ("net: stmmac: enable timestamp snapshot for required PTP packets in dwmac v5.10a")
> Fixes: 3cb958027cb8 ("net: stmmac: Fix E2E delay mechanism")
Given the list of Fixes: do you want this back ported to stable? If
so, you should not submit it for net-next.
Andrew
next prev parent reply other threads:[~2025-11-25 16:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-25 14:50 Rohan G Thomas via B4 Relay
2025-11-25 16:26 ` Andrew Lunn [this message]
2025-11-26 4:24 ` G Thomas, Rohan
2025-11-25 23:19 ` Russell King (Oracle)
2025-11-26 6:01 ` G Thomas, Rohan
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