Subject: [patch 16/24] virtio_rtc: Use provided clock ID for history snapshot

From: Thomas Gleixner <[email-masked]>
Date: Tue, 26 May 2026 19:14:47 +0200

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 <[email-masked]>
Cc: Peter Hilber <[email-masked]>
Cc: "Michael S. Tsirkin" <[email-masked]>
Cc: [email-masked]
---
 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(&history_begin, xtstamp->clock_id);
 	if (history_begin.cs_id != cs_id)
 		return -EOPNOTSUPP;