On Tue, Nov 25, 2025 at 10:50:02PM +0800, Rohan G Thomas via B4 Relay wrote:
From: Rohan G Thomas <redacted>
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