Re: [PATCH v2 net 5/9] net: enetc: update UDP checksum when updating originTimestamp field

On Wed, Feb 19, 2025 at 01:42:43PM +0800, Wei Fang wrote:

There is an issue with one-step timestamp based on UDP/IP. The peer will discard the sync packet because of the wrong UDP checksum. For ENETC v1, the software needs to update the UDP checksum when updating the originTimestamp field, so that the hardware can correctly update the UDP checksum when updating the correction field. Otherwise, the UDP checksum in the sync packet will be wrong.

Fixes: 7294380c5211 ("enetc: support PTP Sync packet one-step timestamping") Cc: stable@vger.kernel.org Signed-off-by: Wei Fang wei.fang@nxp.com

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Reviewed-by: Vladimir Oltean vladimir.oltean@nxp.com Tested-by: Vladimir Oltean vladimir.oltean@nxp.com

Really good catch!