btusb_submit_isoc_urb
if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
btusb_submit_isoc_urb(hdev, GFP_KERNEL);
if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
btusb_submit_isoc_urb(hdev, GFP_NOIO);