diff options
Diffstat (limited to 'drivers/ptp/ptp_s390.c')
| -rw-r--r-- | drivers/ptp/ptp_s390.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/ptp/ptp_s390.c b/drivers/ptp/ptp_s390.c index 29618eb9bf44..02d624d89a0a 100644 --- a/drivers/ptp/ptp_s390.c +++ b/drivers/ptp/ptp_s390.c @@ -107,6 +107,9 @@ static __init int ptp_s390_init(void) if (IS_ERR(ptp_stcke_clock)) return PTR_ERR(ptp_stcke_clock); + if (!test_facility(28) || !ptff_query(PTFF_QPT)) + 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); @@ -117,7 +120,8 @@ 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); } |