[PATCH 1/2] ptp: ptp_s390: Add missing CC check for ptff()
From: Sven Schnelle <svens@linux.ibm.com>
Date: 2026-07-14 08:49:38
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
The code doesn't honor the returned condition code when issuing
the PTFF_QPT call. Fix this by checking the return code and returning
EIO if it is not zero.
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 | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/ptp/ptp_s390.c b/drivers/ptp/ptp_s390.c
index 29618eb9bf44..7299c3aae65f 100644
--- a/drivers/ptp/ptp_s390.c
+++ b/drivers/ptp/ptp_s390.c@@ -48,7 +48,8 @@ static int ptp_s390_qpt_gettime(struct ptp_clock_info *ptp, { unsigned long tod; - ptff(&tod, sizeof(tod), PTFF_QPT); + if (ptff(&tod, sizeof(tod), PTFF_QPT) != 0) + return -EOPNOTSUPP; *ts = tod_to_timespec64(tod); return 0; }
--
2.53.0