From 8da2e59f9f8d7c586ac142956c9645a55ab3b6ee Mon Sep 17 00:00:00 2001
From: Andrew Bower <andrew.bower@amd.com>
Date: Mon, 23 Dec 2024 16:10:08 +0000
Subject: [PATCH] phc: record step on live clocks only. (Fixes
 Xilinx-CNS/sfptpd#17)

---
 src/sfptpd_clock.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/sfptpd_clock.c b/src/sfptpd_clock.c
index 6fd66723..43bdd32f 100644
--- a/src/sfptpd_clock.c
+++ b/src/sfptpd_clock.c
@@ -1095,7 +1095,8 @@ static void clock_record_step(void)
 	clock_lock();
 	for (clock = sfptpd_clock_list_head; clock != NULL; clock = clock->next) {
 		assert(clock->magic == SFPTPD_CLOCK_MAGIC);
-		if (clock->type != SFPTPD_CLOCK_TYPE_SYSTEM)
+		if (clock->type != SFPTPD_CLOCK_TYPE_SYSTEM &&
+		    clock->u.nic.phc != NULL)
 			sfptpd_phc_record_step(clock->u.nic.phc);
 	}
 	clock_unlock();