[PATCH 2/2] ptp: ptp_s390: Add missing facility check
From: Sven Schnelle <svens@linux.ibm.com>
Date: 2026-07-14 08:49:36
Also in:
linux-s390, lkml
Subsystem:
networking drivers, ptp hardware clock support, s390 ptp driver, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Richard Cochran, Sven Schnelle, Linus Torvalds
Only register the physical clock when facility 28 is installed.
Fixes: 2d7de7a3010d ("s390/time: Add PtP driver")
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Cc: stable@kernel.org
---
drivers/ptp/ptp_s390.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/ptp/ptp_s390.c b/drivers/ptp/ptp_s390.c
index 7299c3aae65f..3ea94648cdde 100644
--- a/drivers/ptp/ptp_s390.c
+++ b/drivers/ptp/ptp_s390.c@@ -108,6 +108,9 @@ static __init int ptp_s390_init(void) if (IS_ERR(ptp_stcke_clock)) return PTR_ERR(ptp_stcke_clock); + if (!test_facility(28)) + return 0; + ptp_qpt_clock = ptp_clock_register(&ptp_s390_qpt_info, NULL); if (IS_ERR(ptp_qpt_clock)) { ptp_clock_unregister(ptp_stcke_clock);
@@ -118,7 +121,8 @@ static __init int ptp_s390_init(void) static __exit void ptp_s390_exit(void) { - ptp_clock_unregister(ptp_qpt_clock); + if (ptp_qpt_clock) + ptp_clock_unregister(ptp_qpt_clock); ptp_clock_unregister(ptp_stcke_clock); }
--
2.53.0