diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index d34e54d80149d0b9866989b11f201a7d0f19ba2a..02ea03d220e86cd8afa9d5cd755dc7a8d957c088 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -4414,7 +4414,7 @@ static long btrfs_ioctl_scrub_progress(struct btrfs_fs_info *fs_info,
 
 	ret = btrfs_scrub_progress(fs_info, sa->devid, &sa->progress);
 
-	if (copy_to_user(arg, sa, sizeof(*sa)))
+	if (ret == 0 && copy_to_user(arg, sa, sizeof(*sa)))
 		ret = -EFAULT;
 
 	kfree(sa);