line6pcm->max_packet_size_out =
usb_maxpacket(line6->usbdev,
usb_sndisocpipe(line6->usbdev, ep_write), 1);
+ if (!line6pcm->max_packet_size_in || !line6pcm->max_packet_size_out) {
+ dev_err(line6pcm->line6->ifcdev,
+ "cannot get proper max packet size\n");
+ return -EINVAL;
+ }
spin_lock_init(&line6pcm->out.lock);
spin_lock_init(&line6pcm->in.lock);