offset = get_pipectr_addr(pipenum);
                pid = m66592_read(m66592, offset) & M66592_PID;
        } else
-               printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
+               pr_err("unexpect pipe num (%d)\n", pipenum);
 
        return pid;
 }
                offset = get_pipectr_addr(pipenum);
                m66592_mdfy(m66592, pid, M66592_PID, offset);
        } else
-               printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
+               pr_err("unexpect pipe num (%d)\n", pipenum);
 }
 
 static inline void pipe_start(struct m66592 *m66592, u16 pipenum)
                offset = get_pipectr_addr(pipenum);
                ret = m66592_read(m66592, offset);
        } else
-               printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
+               pr_err("unexpect pipe num (%d)\n", pipenum);
 
        return ret;
 }
                offset = get_pipectr_addr(pipenum);
                m66592_bset(m66592, M66592_SQCLR, offset);
        } else
-               printk(KERN_ERR "unexpect pipe num(%d)\n", pipenum);
+               pr_err("unexpect pipe num(%d)\n", pipenum);
 }
 
 static inline int get_buffer_size(struct m66592 *m66592, u16 pipenum)
                break;
        }
        if (m66592->bi_bufnum > M66592_MAX_BUFNUM) {
-               printk(KERN_ERR "m66592 pipe memory is insufficient(%d)\n",
+               pr_err("m66592 pipe memory is insufficient(%d)\n",
                                m66592->bi_bufnum);
                return -ENOMEM;
        }
                if (info->type == M66592_BULK)
                        m66592->bulk--;
        } else
-               printk(KERN_ERR "ep_release: unexpect pipenum (%d)\n",
+               pr_err("ep_release: unexpect pipenum (%d)\n",
                                info->pipe);
 }
 
        case USB_ENDPOINT_XFER_BULK:
                if (m66592->bulk >= M66592_MAX_NUM_BULK) {
                        if (m66592->isochronous >= M66592_MAX_NUM_ISOC) {
-                               printk(KERN_ERR "bulk pipe is insufficient\n");
+                               pr_err("bulk pipe is insufficient\n");
                                return -ENODEV;
                        } else {
                                info.pipe = M66592_BASE_PIPENUM_ISOC
                break;
        case USB_ENDPOINT_XFER_INT:
                if (m66592->interrupt >= M66592_MAX_NUM_INT) {
-                       printk(KERN_ERR "interrupt pipe is insufficient\n");
+                       pr_err("interrupt pipe is insufficient\n");
                        return -ENODEV;
                }
                info.pipe = M66592_BASE_PIPENUM_INT + m66592->interrupt;
                break;
        case USB_ENDPOINT_XFER_ISOC:
                if (m66592->isochronous >= M66592_MAX_NUM_ISOC) {
-                       printk(KERN_ERR "isochronous pipe is insufficient\n");
+                       pr_err("isochronous pipe is insufficient\n");
                        return -ENODEV;
                }
                info.pipe = M66592_BASE_PIPENUM_ISOC + m66592->isochronous;
                counter = &m66592->isochronous;
                break;
        default:
-               printk(KERN_ERR "unexpect xfer type\n");
+               pr_err("unexpect xfer type\n");
                return -EINVAL;
        }
        ep->type = info.type;
 
        ret = pipe_buffer_setting(m66592, &info);
        if (ret < 0) {
-               printk(KERN_ERR "pipe_buffer_setting fail\n");
+               pr_err("pipe_buffer_setting fail\n");
                return ret;
        }
 
                control_end(ep->m66592, 0);
                break;
        default:
-               printk(KERN_ERR "start_ep0: unexpect ctsq(%x)\n", ctsq);
+               pr_err("start_ep0: unexpect ctsq(%x)\n", ctsq);
                break;
        }
 }
        do {
                tmp = m66592_read(m66592, ep->fifoctr);
                if (i++ > 100000) {
-                       printk(KERN_ERR "pipe0 is busy. maybe cpu i/o bus "
+                       pr_err("pipe0 is busy. maybe cpu i/o bus "
                                "conflict. please power off this controller.");
                        return;
                }
        if (unlikely((tmp & M66592_FRDY) == 0)) {
                pipe_stop(m66592, pipenum);
                pipe_irq_disable(m66592, pipenum);
-               printk(KERN_ERR "write fifo not ready. pipnum=%d\n", pipenum);
+               pr_err("write fifo not ready. pipnum=%d\n", pipenum);
                return;
        }
 
                req->req.status = -EPIPE;
                pipe_stop(m66592, pipenum);
                pipe_irq_disable(m66592, pipenum);
-               printk(KERN_ERR "read fifo not ready");
+               pr_err("read fifo not ready");
                return;
        }
 
                break;
        default:
                m66592->gadget.speed = USB_SPEED_UNKNOWN;
-               printk(KERN_ERR "USB speed unknown\n");
+               pr_err("USB speed unknown\n");
        }
 }
 
                control_end(m66592, 0);
                break;
        default:
-               printk(KERN_ERR "ctrl_stage: unexpect ctsq(%x)\n", ctsq);
+               pr_err("ctrl_stage: unexpect ctsq(%x)\n", ctsq);
                break;
        }
 }
 
        retval = device_add(&m66592->gadget.dev);
        if (retval) {
-               printk(KERN_ERR "device_add error (%d)\n", retval);
+               pr_err("device_add error (%d)\n", retval);
                goto error;
        }
 
        retval = driver->bind (&m66592->gadget);
        if (retval) {
-               printk(KERN_ERR "bind to driver error (%d)\n", retval);
+               pr_err("bind to driver error (%d)\n", retval);
                device_del(&m66592->gadget.dev);
                goto error;
        }
                        (char *)udc_name);
        if (!res) {
                ret = -ENODEV;
-               printk(KERN_ERR "platform_get_resource_byname error.\n");
+               pr_err("platform_get_resource_byname error.\n");
                goto clean_up;
        }
 
        irq = platform_get_irq(pdev, 0);
        if (irq < 0) {
                ret = -ENODEV;
-               printk(KERN_ERR "platform_get_irq error.\n");
+               pr_err("platform_get_irq error.\n");
                goto clean_up;
        }
 
        reg = ioremap(res->start, resource_len(res));
        if (reg == NULL) {
                ret = -ENOMEM;
-               printk(KERN_ERR "ioremap error.\n");
+               pr_err("ioremap error.\n");
                goto clean_up;
        }
 
        /* initialize ucd */
        m66592 = kzalloc(sizeof(struct m66592), GFP_KERNEL);
        if (m66592 == NULL) {
-               printk(KERN_ERR "kzalloc error\n");
+               pr_err("kzalloc error\n");
                goto clean_up;
        }
 
        ret = request_irq(irq, m66592_irq, IRQF_DISABLED | IRQF_SHARED,
                        udc_name, m66592);
        if (ret < 0) {
-               printk(KERN_ERR "request_irq error (%d)\n", ret);
+               pr_err("request_irq error (%d)\n", ret);
                goto clean_up;
        }
 
 
 #endif
 
 #define gs_debug(format, arg...) \
-       do { if (debug) printk(KERN_DEBUG format, ## arg); } while(0)
+       do { if (debug) pr_debug(format, ## arg); } while (0)
 #define gs_debug_level(level, format, arg...) \
-       do { if (debug>=level) printk(KERN_DEBUG format, ## arg); } while(0)
+       do { if (debug >= level) pr_debug(format, ## arg); } while (0)
 
 
 /* Thanks to NetChip Technologies for donating this product ID.
 
        retval = usb_gadget_register_driver(&gs_gadget_driver);
        if (retval) {
-               printk(KERN_ERR "gs_module_init: cannot register gadget driver, ret=%d\n", retval);
+               pr_err("gs_module_init: cannot register gadget driver, "
+                       "ret=%d\n", retval);
                return retval;
        }
 
        if (retval) {
                usb_gadget_unregister_driver(&gs_gadget_driver);
                put_tty_driver(gs_tty_driver);
-               printk(KERN_ERR "gs_module_init: cannot register tty driver, ret=%d\n", retval);
+               pr_err("gs_module_init: cannot register tty driver, "
+                               "ret=%d\n", retval);
                return retval;
        }
 
-       printk(KERN_INFO "gs_module_init: %s %s loaded\n", GS_LONG_NAME, GS_VERSION_STR);
+       pr_info("gs_module_init: %s %s loaded\n",
+                       GS_LONG_NAME, GS_VERSION_STR);
        return 0;
 }
 
        put_tty_driver(gs_tty_driver);
        usb_gadget_unregister_driver(&gs_gadget_driver);
 
-       printk(KERN_INFO "gs_module_exit: %s %s unloaded\n", GS_LONG_NAME, GS_VERSION_STR);
+       pr_info("gs_module_exit: %s %s unloaded\n",
+                       GS_LONG_NAME, GS_VERSION_STR);
 }
 
 /* TTY Driver */
        gs_debug("gs_open: (%d,%p,%p)\n", port_num, tty, file);
 
        if (port_num < 0 || port_num >= GS_NUM_PORTS) {
-               printk(KERN_ERR "gs_open: (%d,%p,%p) invalid port number\n",
+               pr_err("gs_open: (%d,%p,%p) invalid port number\n",
                        port_num, tty, file);
                return -ENODEV;
        }
        dev = gs_device;
 
        if (dev == NULL) {
-               printk(KERN_ERR "gs_open: (%d,%p,%p) NULL device pointer\n",
+               pr_err("gs_open: (%d,%p,%p) NULL device pointer\n",
                        port_num, tty, file);
                return -ENODEV;
        }
 
        mtx = &gs_open_close_lock[port_num];
        if (mutex_lock_interruptible(mtx)) {
-               printk(KERN_ERR
-               "gs_open: (%d,%p,%p) interrupted waiting for mutex\n",
+               pr_err("gs_open: (%d,%p,%p) interrupted waiting for mutex\n",
                        port_num, tty, file);
                return -ERESTARTSYS;
        }
        spin_lock_irqsave(&dev->dev_lock, flags);
 
        if (dev->dev_config == GS_NO_CONFIG_ID) {
-               printk(KERN_ERR
-                       "gs_open: (%d,%p,%p) device is not connected\n",
+               pr_err("gs_open: (%d,%p,%p) device is not connected\n",
                        port_num, tty, file);
                ret = -ENODEV;
                goto exit_unlock_dev;
        port = dev->dev_port[port_num];
 
        if (port == NULL) {
-               printk(KERN_ERR "gs_open: (%d,%p,%p) NULL port pointer\n",
+               pr_err("gs_open: (%d,%p,%p) NULL port pointer\n",
                        port_num, tty, file);
                ret = -ENODEV;
                goto exit_unlock_dev;
        spin_unlock(&dev->dev_lock);
 
        if (port->port_dev == NULL) {
-               printk(KERN_ERR "gs_open: (%d,%p,%p) port disconnected (1)\n",
+               pr_err("gs_open: (%d,%p,%p) port disconnected (1)\n",
                        port_num, tty, file);
                ret = -EIO;
                goto exit_unlock_port;
 
                /* might have been disconnected while asleep, check */
                if (port->port_dev == NULL) {
-                       printk(KERN_ERR
-                               "gs_open: (%d,%p,%p) port disconnected (2)\n",
+                       pr_err("gs_open: (%d,%p,%p) port disconnected (2)\n",
                                port_num, tty, file);
                        port->port_in_use = 0;
                        ret = -EIO;
                }
 
                if ((port->port_write_buf=buf) == NULL) {
-                       printk(KERN_ERR "gs_open: (%d,%p,%p) cannot allocate port write buffer\n",
+                       pr_err("gs_open: (%d,%p,%p) cannot allocate "
+                               "port write buffer\n",
                                port_num, tty, file);
                        port->port_in_use = 0;
                        ret = -ENOMEM;
 
        /* might have been disconnected while asleep, check */
        if (port->port_dev == NULL) {
-               printk(KERN_ERR "gs_open: (%d,%p,%p) port disconnected (3)\n",
+               pr_err("gs_open: (%d,%p,%p) port disconnected (3)\n",
                        port_num, tty, file);
                port->port_in_use = 0;
                ret = -EIO;
        struct mutex *mtx;
 
        if (port == NULL) {
-               printk(KERN_ERR "gs_close: NULL port pointer\n");
+               pr_err("gs_close: NULL port pointer\n");
                return;
        }
 
        spin_lock_irq(&port->port_lock);
 
        if (port->port_open_count == 0) {
-               printk(KERN_ERR
-                       "gs_close: (%d,%p,%p) port is already closed\n",
+               pr_err("gs_close: (%d,%p,%p) port is already closed\n",
                        port->port_num, tty, file);
                goto exit;
        }
        int ret;
 
        if (port == NULL) {
-               printk(KERN_ERR "gs_write: NULL port pointer\n");
+               pr_err("gs_write: NULL port pointer\n");
                return -EIO;
        }
 
        spin_lock_irqsave(&port->port_lock, flags);
 
        if (port->port_dev == NULL) {
-               printk(KERN_ERR "gs_write: (%d,%p) port is not connected\n",
+               pr_err("gs_write: (%d,%p) port is not connected\n",
                        port->port_num, tty);
                ret = -EIO;
                goto exit;
        }
 
        if (port->port_open_count == 0) {
-               printk(KERN_ERR "gs_write: (%d,%p) port is closed\n",
+               pr_err("gs_write: (%d,%p) port is closed\n",
                        port->port_num, tty);
                ret = -EBADF;
                goto exit;
        struct gs_port *port = tty->driver_data;
 
        if (port == NULL) {
-               printk(KERN_ERR "gs_put_char: NULL port pointer\n");
+               pr_err("gs_put_char: NULL port pointer\n");
                return;
        }
 
        spin_lock_irqsave(&port->port_lock, flags);
 
        if (port->port_dev == NULL) {
-               printk(KERN_ERR "gs_put_char: (%d,%p) port is not connected\n",
+               pr_err("gs_put_char: (%d,%p) port is not connected\n",
                        port->port_num, tty);
                goto exit;
        }
 
        if (port->port_open_count == 0) {
-               printk(KERN_ERR "gs_put_char: (%d,%p) port is closed\n",
+               pr_err("gs_put_char: (%d,%p) port is closed\n",
                        port->port_num, tty);
                goto exit;
        }
        struct gs_port *port = tty->driver_data;
 
        if (port == NULL) {
-               printk(KERN_ERR "gs_flush_chars: NULL port pointer\n");
+               pr_err("gs_flush_chars: NULL port pointer\n");
                return;
        }
 
        spin_lock_irqsave(&port->port_lock, flags);
 
        if (port->port_dev == NULL) {
-               printk(KERN_ERR
-                       "gs_flush_chars: (%d,%p) port is not connected\n",
+               pr_err("gs_flush_chars: (%d,%p) port is not connected\n",
                        port->port_num, tty);
                goto exit;
        }
 
        if (port->port_open_count == 0) {
-               printk(KERN_ERR "gs_flush_chars: (%d,%p) port is closed\n",
+               pr_err("gs_flush_chars: (%d,%p) port is closed\n",
                        port->port_num, tty);
                goto exit;
        }
        struct gs_port *port = tty->driver_data;
 
        if (port == NULL) {
-               printk(KERN_ERR "gs_ioctl: NULL port pointer\n");
+               pr_err("gs_ioctl: NULL port pointer\n");
                return -EIO;
        }
 
        struct gs_req_entry *req_entry;
 
        if (dev == NULL) {
-               printk(KERN_ERR "gs_send: NULL device pointer\n");
+               pr_err("gs_send: NULL device pointer\n");
                return -ENODEV;
        }
 
                        req->length = len;
                        spin_unlock_irqrestore(&dev->dev_lock, flags);
                        if ((ret=usb_ep_queue(ep, req, GFP_ATOMIC))) {
-                               printk(KERN_ERR
+                               pr_err(
                                "gs_send: cannot queue read request, ret=%d\n",
                                        ret);
                                spin_lock_irqsave(&dev->dev_lock, flags);
        port = dev->dev_port[0];
 
        if (port == NULL) {
-               printk(KERN_ERR
-                       "gs_send_packet: port=%d, NULL port pointer\n",
-                       0);
+               pr_err("gs_send_packet: port=%d, NULL port pointer\n", 0);
                return -EIO;
        }
 
        port = dev->dev_port[0];
 
        if (port == NULL) {
-               printk(KERN_ERR "gs_recv_packet: port=%d, NULL port pointer\n",
+               pr_err("gs_recv_packet: port=%d, NULL port pointer\n",
                        port->port_num);
                return -EIO;
        }
        spin_lock(&port->port_lock);
 
        if (port->port_open_count == 0) {
-               printk(KERN_ERR "gs_recv_packet: port=%d, port is closed\n",
+               pr_err("gs_recv_packet: port=%d, port is closed\n",
                        port->port_num);
                ret = -EIO;
                goto exit;
        tty = port->port_tty;
 
        if (tty == NULL) {
-               printk(KERN_ERR "gs_recv_packet: port=%d, NULL tty pointer\n",
+               pr_err("gs_recv_packet: port=%d, NULL tty pointer\n",
                        port->port_num);
                ret = -EIO;
                goto exit;
        }
 
        if (port->port_tty->magic != TTY_MAGIC) {
-               printk(KERN_ERR "gs_recv_packet: port=%d, bad tty magic\n",
+               pr_err("gs_recv_packet: port=%d, bad tty magic\n",
                        port->port_num);
                ret = -EIO;
                goto exit;
        struct gs_dev *dev = ep->driver_data;
 
        if (dev == NULL) {
-               printk(KERN_ERR "gs_read_complete: NULL device pointer\n");
+               pr_err("gs_read_complete: NULL device pointer\n");
                return;
        }
 
 requeue:
                req->length = ep->maxpacket;
                if ((ret=usb_ep_queue(ep, req, GFP_ATOMIC))) {
-                       printk(KERN_ERR
+                       pr_err(
                        "gs_read_complete: cannot queue read request, ret=%d\n",
                                ret);
                }
 
        default:
                /* unexpected */
-               printk(KERN_ERR
+               pr_err(
                "gs_read_complete: unexpected status error, status=%d\n",
                        req->status);
                goto requeue;
        struct gs_req_entry *gs_req = req->context;
 
        if (dev == NULL) {
-               printk(KERN_ERR "gs_write_complete: NULL device pointer\n");
+               pr_err("gs_write_complete: NULL device pointer\n");
                return;
        }
 
                /* normal completion */
 requeue:
                if (gs_req == NULL) {
-                       printk(KERN_ERR
-                               "gs_write_complete: NULL request pointer\n");
+                       pr_err("gs_write_complete: NULL request pointer\n");
                        return;
                }
 
                break;
 
        default:
-               printk(KERN_ERR
+               pr_err(
                "gs_write_complete: unexpected status error, status=%d\n",
                        req->status);
                goto requeue;
                gs_device_desc.bcdDevice =
                                cpu_to_le16(GS_VERSION_NUM | gcnum);
        else {
-               printk(KERN_WARNING "gs_bind: controller '%s' not recognized\n",
+               pr_warning("gs_bind: controller '%s' not recognized\n",
                        gadget->name);
                /* unrecognized, but safe unless bulk is REALLY quirky */
                gs_device_desc.bcdDevice =
        if (use_acm) {
                ep = usb_ep_autoconfig(gadget, &gs_fullspeed_notify_desc);
                if (!ep) {
-                       printk(KERN_ERR "gs_bind: cannot run ACM on %s\n", gadget->name);
+                       pr_err("gs_bind: cannot run ACM on %s\n", gadget->name);
                        goto autoconf_fail;
                }
                gs_device_desc.idProduct = __constant_cpu_to_le16(
        set_gadget_data(gadget, dev);
 
        if ((ret=gs_alloc_ports(dev, GFP_KERNEL)) != 0) {
-               printk(KERN_ERR "gs_bind: cannot allocate ports\n");
+               pr_err("gs_bind: cannot allocate ports\n");
                gs_unbind(gadget);
                return ret;
        }
 
        gadget->ep0->driver_data = dev;
 
-       printk(KERN_INFO "gs_bind: %s %s bound\n",
+       pr_info("gs_bind: %s %s bound\n",
                GS_LONG_NAME, GS_VERSION_STR);
 
        return 0;
 
 autoconf_fail:
-       printk(KERN_ERR "gs_bind: cannot autoconfigure on %s\n", gadget->name);
+       pr_err("gs_bind: cannot autoconfigure on %s\n", gadget->name);
        return -ENODEV;
 }
 
                set_gadget_data(gadget, NULL);
        }
 
-       printk(KERN_INFO "gs_unbind: %s %s unbound\n", GS_LONG_NAME,
+       pr_info("gs_unbind: %s %s unbound\n", GS_LONG_NAME,
                GS_VERSION_STR);
 }
 
                break;
 
        default:
-               printk(KERN_ERR "gs_setup: unknown request, type=%02x, request=%02x, value=%04x, index=%04x, length=%d\n",
+               pr_err("gs_setup: unknown request, type=%02x, request=%02x, "
+                       "value=%04x, index=%04x, length=%d\n",
                        ctrl->bRequestType, ctrl->bRequest,
                        wValue, wIndex, wLength);
                break;
                                && (ret % gadget->ep0->maxpacket) == 0;
                ret = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC);
                if (ret < 0) {
-                       printk(KERN_ERR "gs_setup: cannot queue response, ret=%d\n",
+                       pr_err("gs_setup: cannot queue response, ret=%d\n",
                                ret);
                        req->status = 0;
                        gs_setup_complete(gadget->ep0, req);
                break;
 
        default:
-               printk(KERN_ERR "gs_setup: unknown standard request, type=%02x, request=%02x, value=%04x, index=%04x, length=%d\n",
+               pr_err("gs_setup: unknown standard request, type=%02x, "
+                       "request=%02x, value=%04x, index=%04x, length=%d\n",
                        ctrl->bRequestType, ctrl->bRequest,
                        wValue, wIndex, wLength);
                break;
                 * handler copy that data to port->port_line_coding (iff
                 * it's valid) and maybe pass it on.  Until then, fail.
                 */
-               printk(KERN_WARNING "gs_setup: set_line_coding "
+               pr_warning("gs_setup: set_line_coding "
                                "unuspported\n");
                break;
 
                 * handler use that to set the state (iff it's valid) and
                 * maybe pass it on.  Until then, fail.
                 */
-               printk(KERN_WARNING "gs_setup: set_control_line_state "
+               pr_warning("gs_setup: set_control_line_state "
                                "unuspported\n");
                break;
 
        default:
-               printk(KERN_ERR "gs_setup: unknown class request, "
+               pr_err("gs_setup: unknown class request, "
                                "type=%02x, request=%02x, value=%04x, "
                                "index=%04x, length=%d\n",
                        ctrl->bRequestType, ctrl->bRequest,
 static void gs_setup_complete(struct usb_ep *ep, struct usb_request *req)
 {
        if (req->status || req->actual != req->length) {
-               printk(KERN_ERR "gs_setup_complete: status error, status=%d, actual=%d, length=%d\n",
+               pr_err("gs_setup_complete: status error, status=%d, "
+                       "actual=%d, length=%d\n",
                        req->status, req->actual, req->length);
        }
 }
 
        /* re-allocate ports for the next connection */
        if (gs_alloc_ports(dev, GFP_ATOMIC) != 0)
-               printk(KERN_ERR "gs_disconnect: cannot re-allocate ports\n");
+               pr_err("gs_disconnect: cannot re-allocate ports\n");
 
        spin_unlock_irqrestore(&dev->dev_lock, flags);
 
-       printk(KERN_INFO "gs_disconnect: %s disconnected\n", GS_LONG_NAME);
+       pr_info("gs_disconnect: %s disconnected\n", GS_LONG_NAME);
 }
 
 /*
        struct gs_req_entry *req_entry;
 
        if (dev == NULL) {
-               printk(KERN_ERR "gs_set_config: NULL device pointer\n");
+               pr_err("gs_set_config: NULL device pointer\n");
                return 0;
        }
 
                                dev->dev_notify_ep = ep;
                                dev->dev_notify_ep_desc = ep_desc;
                        } else {
-                               printk(KERN_ERR "gs_set_config: cannot enable notify endpoint %s, ret=%d\n",
+                               pr_err("gs_set_config: cannot enable NOTIFY "
+                                       "endpoint %s, ret=%d\n",
                                        ep->name, ret);
                                goto exit_reset_config;
                        }
                                dev->dev_in_ep = ep;
                                dev->dev_in_ep_desc = ep_desc;
                        } else {
-                               printk(KERN_ERR "gs_set_config: cannot enable in endpoint %s, ret=%d\n",
+                               pr_err("gs_set_config: cannot enable IN "
+                                       "endpoint %s, ret=%d\n",
                                        ep->name, ret);
                                goto exit_reset_config;
                        }
                                dev->dev_out_ep = ep;
                                dev->dev_out_ep_desc = ep_desc;
                        } else {
-                               printk(KERN_ERR "gs_set_config: cannot enable out endpoint %s, ret=%d\n",
+                               pr_err("gs_set_config: cannot enable OUT "
+                                       "endpoint %s, ret=%d\n",
                                        ep->name, ret);
                                goto exit_reset_config;
                        }
 
        if (dev->dev_in_ep == NULL || dev->dev_out_ep == NULL
        || (config != GS_BULK_CONFIG_ID && dev->dev_notify_ep == NULL)) {
-               printk(KERN_ERR "gs_set_config: cannot find endpoints\n");
+               pr_err("gs_set_config: cannot find endpoints\n");
                ret = -ENODEV;
                goto exit_reset_config;
        }
                if ((req=gs_alloc_req(ep, ep->maxpacket, GFP_ATOMIC))) {
                        req->complete = gs_read_complete;
                        if ((ret=usb_ep_queue(ep, req, GFP_ATOMIC))) {
-                               printk(KERN_ERR "gs_set_config: cannot queue read request, ret=%d\n",
-                                       ret);
+                               pr_err("gs_set_config: cannot queue read "
+                                       "request, ret=%d\n", ret);
                        }
                } else {
-                       printk(KERN_ERR "gs_set_config: cannot allocate read requests\n");
+                       pr_err("gs_set_config: cannot allocate "
+                                       "read requests\n");
                        ret = -ENOMEM;
                        goto exit_reset_config;
                }
                        req_entry->re_req->complete = gs_write_complete;
                        list_add(&req_entry->re_entry, &dev->dev_req_list);
                } else {
-                       printk(KERN_ERR "gs_set_config: cannot allocate write requests\n");
+                       pr_err("gs_set_config: cannot allocate "
+                                       "write requests\n");
                        ret = -ENOMEM;
                        goto exit_reset_config;
                }
        }
 
-       printk(KERN_INFO "gs_set_config: %s configured, %s speed %s config\n",
+       pr_info("gs_set_config: %s configured, %s speed %s config\n",
                GS_LONG_NAME,
                gadget->speed == USB_SPEED_HIGH ? "high" : "full",
                config == GS_BULK_CONFIG_ID ? "BULK" : "CDC-ACM");
        struct gs_req_entry *req_entry;
 
        if (dev == NULL) {
-               printk(KERN_ERR "gs_reset_config: NULL device pointer\n");
+               pr_err("gs_reset_config: NULL device pointer\n");
                return;
        }