summaryrefslogtreecommitdiffstats
path: root/drivers/ptp/ptp_clock.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/ptp/ptp_clock.c')
-rw-r--r--drivers/ptp/ptp_clock.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c
index 790f9250b381..80f74e38c2da 100644
--- a/drivers/ptp/ptp_clock.c
+++ b/drivers/ptp/ptp_clock.c
@@ -135,11 +135,15 @@ static int ptp_clock_adjtime(struct posix_clock *pc, struct __kernel_timex *tx)
ptp->dialed_frequency = tx->freq;
} else if (tx->modes & ADJ_OFFSET) {
if (ops->adjphase) {
+ s32 max_phase_adj = ops->getmaxphase(ops);
s32 offset = tx->offset;
if (!(tx->modes & ADJ_NANO))
offset *= NSEC_PER_USEC;
+ if (offset > max_phase_adj || offset < -max_phase_adj)
+ return -ERANGE;
+
err = ops->adjphase(ops, offset);
}
} else if (tx->modes == 0) {