[patch V2 16/25] virtio_rtc: Use provided clock ID for history snapshot

From: Thomas Gleixner

Date: Fri May 29 2026 - 16:16:23 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/virtio/virtio_rtc_ptp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/virtio/virtio_rtc_ptp.c
+++ b/drivers/virtio/virtio_rtc_ptp.c
@@ -139,7 +139,7 @@ static int viortc_ptp_getcrosststamp(str
if (ret)
return ret;

- ktime_get_snapshot(&history_begin);
+ ktime_get_snapshot_id(xtstamp->clock_id, &history_begin);
if (history_begin.cs_id != cs_id)
return -EOPNOTSUPP;