rmw->or_value = F020_MASK_ADC0CF_AMP0GN2;
                break;
        default:
-               err("Illegal gain %d\n", gain);
+               dev_err(&dev->interface->dev, "Illegal gain %d\n", gain);
 
        }
 }
        iface_desc = interface->cur_altsetting;
 
        if (iface_desc->desc.bNumEndpoints != 5) {
-               err("Wrong number of endpoints.");
+               dev_err(&interface->dev, "Wrong number of endpoints.\n");
                retval = -ENODEV;
                goto error;
        }
        }
 
        if (dt9812_read_info(dev, 1, &dev->vendor, sizeof(dev->vendor)) != 0) {
-               err("Failed to read vendor.");
+               dev_err(&interface->dev, "Failed to read vendor.\n");
                retval = -ENODEV;
                goto error;
        }
        if (dt9812_read_info(dev, 3, &dev->product, sizeof(dev->product)) != 0) {
-               err("Failed to read product.");
+               dev_err(&interface->dev, "Failed to read product.\n");
                retval = -ENODEV;
                goto error;
        }
        if (dt9812_read_info(dev, 5, &dev->device, sizeof(dev->device)) != 0) {
-               err("Failed to read device.");
+               dev_err(&interface->dev, "Failed to read device.\n");
                retval = -ENODEV;
                goto error;
        }
        if (dt9812_read_info(dev, 7, &dev->serial, sizeof(dev->serial)) != 0) {
-               err("Failed to read serial.");
+               dev_err(&interface->dev, "Failed to read serial.\n");
                retval = -ENODEV;
                goto error;
        }
        result = comedi_driver_register(&dt9812_comedi_driver);
        if (result) {
                usb_deregister(&dt9812_usb_driver);
-               err("comedi_driver_register failed. Error number %d", result);
+               printk(KERN_ERR KBUILD_MODNAME
+                       ": comedi_driver_register failed. Error number %d\n",
+                       result);
        }
 
        return result;