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-rw-r--r--drivers/ptp/ptp_chardev.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/ptp/ptp_chardev.c b/drivers/ptp/ptp_chardev.c
index a8d03aeb4051..93fa22de5977 100644
--- a/drivers/ptp/ptp_chardev.c
+++ b/drivers/ptp/ptp_chardev.c
@@ -46,7 +46,8 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
caps.n_ext_ts = ptp->info->n_ext_ts;
caps.n_per_out = ptp->info->n_per_out;
caps.pps = ptp->info->pps;
- err = copy_to_user((void __user *)arg, &caps, sizeof(caps));
+ if (copy_to_user((void __user *)arg, &caps, sizeof(caps)))
+ err = -EFAULT;
break;
case PTP_EXTTS_REQUEST: