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| author | Sven Schnelle <svens@linux.ibm.com> | 2026-07-14 15:03:42 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-07-23 07:02:34 -0700 |
| commit | e78f1ac37afcb16cb6fef8a2c92591eab6558956 (patch) | |
| tree | 98f78a6a71bbcac7528ea2d607832dbb36be9543 /drivers | |
| parent | 9de445d8296a7f2b011ebb5834fdc94dcda5c778 (diff) | |
| download | linux-e78f1ac37afcb16cb6fef8a2c92591eab6558956.tar.gz linux-e78f1ac37afcb16cb6fef8a2c92591eab6558956.tar.bz2 linux-e78f1ac37afcb16cb6fef8a2c92591eab6558956.zip | |
ptp: ptp_s390: Add missing facility check
Only register the physical clock when facility 28 is installed
and PTFF QAF returns that PTFF QPT is available.
Fixes: 2d7de7a3010d ("s390/time: Add PtP driver")
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Cc: stable@kernel.org
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Link: https://patch.msgid.link/20260714130342.1971700-3-svens@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers')
| -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); } |