interface = usb_find_interface(&adu_driver, subminor);
        if (!interface) {
-               err("%s - error, can't find device for minor %d",
-                   __func__, subminor);
+               printk(KERN_ERR "adutux: %s - error, can't find device for "
+                      "minor %d\n", __func__, subminor);
                retval = -ENODEV;
                goto exit_no_device;
        }
        /* verify that the device wasn't unplugged */
        if (dev->udev == NULL) {
                retval = -ENODEV;
-               err("No device or device unplugged %d", retval);
+               printk(KERN_ERR "adutux: No device or device unplugged %d\n",
+                      retval);
                goto exit;
        }
 
        /* verify that the device wasn't unplugged */
        if (dev->udev == NULL) {
                retval = -ENODEV;
-               err("No device or device unplugged %d", retval);
+               printk(KERN_ERR "adutux: No device or device unplugged %d\n",
+                      retval);
                goto exit;
        }
 
                        retval = usb_submit_urb(dev->interrupt_out_urb, GFP_KERNEL);
                        if (retval < 0) {
                                dev->out_urb_finished = 1;
-                               err("Couldn't submit interrupt_out_urb %d", retval);
+                               dev_err(&dev->udev->dev, "Couldn't submit "
+                                       "interrupt_out_urb %d\n", retval);
                                goto exit;
                        }
 
        /* register this driver with the USB subsystem */
        result = usb_register(&adu_driver);
        if (result < 0) {
-               err("usb_register failed for the "__FILE__" driver. "
-                   "Error number %d", result);
+               printk(KERN_ERR "usb_register failed for the "__FILE__
+                      " driver. Error number %d\n", result);
                goto exit;
        }
 
 
 exit:
        retval = usb_submit_urb(pdata->urb, GFP_ATOMIC);
        if (retval) {
-               err("%s - usb_submit_urb failed with result %d",
+               dev_err(&pdata->udev->dev,
+                       "%s - usb_submit_urb failed with result %d\n",
                        __func__, retval);
        }
 }
                }
        }
        if (!int_in_endpointAddr) {
-               err("Could not find int-in endpoint");
+               dev_err(&iface->dev, "Could not find int-in endpoint\n");
                return -EIO;
        }
 
        pdata = kzalloc(sizeof(struct appledisplay), GFP_KERNEL);
        if (!pdata) {
                retval = -ENOMEM;
-               err("Out of memory");
+               dev_err(&iface->dev, "Out of memory\n");
                goto error;
        }
 
        pdata->msgdata = kmalloc(ACD_MSG_BUFFER_LEN, GFP_KERNEL);
        if (!pdata->msgdata) {
                retval = -ENOMEM;
-               err("appledisplay: Allocating buffer for control messages "
-                       "failed");
+               dev_err(&iface->dev,
+                       "Allocating buffer for control messages failed\n");
                goto error;
        }
 
        pdata->urb = usb_alloc_urb(0, GFP_KERNEL);
        if (!pdata->urb) {
                retval = -ENOMEM;
-               err("appledisplay: Allocating URB failed");
+               dev_err(&iface->dev, "Allocating URB failed\n");
                goto error;
        }
 
                GFP_KERNEL, &pdata->urb->transfer_dma);
        if (!pdata->urbdata) {
                retval = -ENOMEM;
-               err("appledisplay: Allocating URB buffer failed");
+               dev_err(&iface->dev, "Allocating URB buffer failed\n");
                goto error;
        }
 
                pdata, 1);
        if (usb_submit_urb(pdata->urb, GFP_KERNEL)) {
                retval = -EIO;
-               err("appledisplay: Submitting URB failed");
+               dev_err(&iface->dev, "Submitting URB failed\n");
                goto error;
        }
 
        pdata->bd = backlight_device_register(bl_name, NULL, pdata,
                                                &appledisplay_bl_data);
        if (IS_ERR(pdata->bd)) {
-               err("appledisplay: Backlight registration failed");
+               dev_err(&iface->dev, "Backlight registration failed\n");
                goto error;
        }
 
 
        if (brightness < 0) {
                retval = brightness;
-               err("appledisplay: Error while getting initial brightness: %d", retval);
+               dev_err(&iface->dev,
+                       "Error while getting initial brightness: %d\n", retval);
                goto error;
        }
 
 {
        wq = create_singlethread_workqueue("appledisplay");
        if (!wq) {
-               err("Could not create work queue\n");
+               printk(KERN_ERR "appledisplay: Could not create work queue\n");
                return -ENOMEM;
        }
 
 
 
        /* register this driver with the USB subsystem */
        result = usb_register(&cypress_driver);
-       if (result) {
-               err("Function usb_register failed! Error number: %d\n", result);
-       }
+       if (result)
+               printk(KERN_ERR KBUILD_MODNAME ": usb_register failed! "
+                      "Error number: %d\n", result);
 
        return result;
 }
 
        int result;
 
        result = usb_register(&cytherm_driver);
-       if (result) 
-       {       
-               err("usb_register failed. Error number %d", result);
+       if (result) {
+               printk(KERN_ERR KBUILD_MODNAME ": usb_register failed! "
+                      "Error number: %d\n", result);
                return result;
        }
 
 
        unsigned char *buffer =  kmemdup(data, length, GFP_KERNEL);
 
        if (!buffer) {
-               err("emi26: kmalloc(%d) failed.", length);
+               dev_err(&dev->dev, "kmalloc(%d) failed.\n", length);
                return -ENOMEM;
        }
        /* Note: usb_control_msg returns negative value on error or length of the
        /* printk(KERN_DEBUG "%s - %d", __func__, reset_bit); */
        response = emi26_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0);
        if (response < 0) {
-               err("emi26: set_reset (%d) failed", reset_bit);
+               dev_err(&dev->dev, "set_reset (%d) failed\n", reset_bit);
        }
        return response;
 }
 
        buf = kmalloc(FW_LOAD_SIZE, GFP_KERNEL);
        if (!buf) {
-               err( "%s - error loading firmware: error = %d", __func__, -ENOMEM);
+               dev_err(&dev->dev, "%s - error loading firmware: error = %d\n",
+                       __func__, -ENOMEM);
                err = -ENOMEM;
                goto wraperr;
        }
                                    &dev->dev);
        if (err) {
        nofw:
-               err( "%s - request_firmware() failed", __func__);
+               dev_err(&dev->dev, "%s - request_firmware() failed\n",
+                       __func__);
                goto wraperr;
        }
 
        /* Assert reset (stop the CPU in the EMI) */
        err = emi26_set_reset(dev,1);
        if (err < 0) {
-               err( "%s - error loading firmware: error = %d", __func__, err);
+               dev_err(&dev->dev,"%s - error loading firmware: error = %d\n",
+                       __func__, err);
                goto wraperr;
        }