[patch V2 15/25] net/mlx5: Use provided clock ID for history snapshot

From: Thomas Gleixner

Date: Fri May 29 2026 - 16:05:04 EST


From: Thomas Gleixner <tglx@xxxxxxxxxx>

The PTP core indicates in system_device_crosststamp::clock_id the clock ID
for which the system time stamp should be taken. That allows to utilize
hardware timestamps with e.g. AUX clocks.

Use ktime_get_snapshot_id() and hand the provided clock ID in.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxx>
Tested-by: Arthur Kiyanovski <akiyano@xxxxxxxxxx>
Reviewed-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
Reviewed-by: Jacob Keller <jacob.e.keller@xxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
@@ -340,7 +340,7 @@ static int mlx5_ptp_getcrosststamp(struc
goto unlock;
}

- ktime_get_snapshot(&history_begin);
+ ktime_get_snapshot_id(cts->clock_id, &history_begin);

err = get_device_system_crosststamp(mlx5_mtctr_syncdevicetime, mdev,
&history_begin, cts);
@@ -366,7 +366,7 @@ static int mlx5_ptp_getcrosscycles(struc
goto unlock;
}

- ktime_get_snapshot(&history_begin);
+ ktime_get_snapshot_id(cts->clock_id, &history_begin);

err = get_device_system_crosststamp(mlx5_mtctr_syncdevicecyclestime,
mdev, &history_begin, cts);