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| /openbmc/linux/drivers/net/ethernet/mscc/ |
| H A D | ocelot.c | diff fba01283d85a09e0e2ef552c6e764b903111d90a Tue Oct 12 06:40:38 CDT 2021 Vladimir Oltean <vladimir.oltean@nxp.com> net: mscc: ocelot: deny TX timestamping of non-PTP packets
It appears that Ocelot switches cannot timestamp non-PTP frames,
I tested this using the isochron program at:
https://github.com/vladimiroltean/tsn-scripts
with the result that the driver increments the ocelot_port->ts_id
counter as expected, puts it in the REW_OP, but the hardware seems to
not timestamp these packets at all, since no IRQ is emitted.
Therefore check whether we are sending PTP frames, and refuse to
populate REW_OP otherwise.
Fixes: 4e3b0468e6d7 ("net: mscc: PTP Hardware Clock (PHC) support")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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