Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 1331 insertions, 0 deletions

diff --git a/kernel/drivers/net/usb/kaweth.c b/kernel/drivers/net/usb/kaweth.c
new file mode 100644
index 000000000..1e9cdca37
--- /dev/null
+++ b/kernel/drivers/net/usb/kaweth.c
@@ -0,0 +1,1331 @@
+/****************************************************************
+ *
+ *     kaweth.c - driver for KL5KUSB101 based USB->Ethernet
+ *
+ *     (c) 2000 Interlan Communications
+ *     (c) 2000 Stephane Alnet
+ *     (C) 2001 Brad Hards
+ *     (C) 2002 Oliver Neukum
+ *
+ *     Original author: The Zapman <zapman@interlan.net>
+ *     Inspired by, and much credit goes to Michael Rothwell
+ *     <rothwell@interlan.net> for the test equipment, help, and patience
+ *     Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
+ *     Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
+ *     for providing the firmware and driver resources.
+ *
+ *     This program is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU General Public License as
+ *     published by the Free Software Foundation; either version 2, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ ****************************************************************/
+
+/* TODO:
+ * Develop test procedures for USB net interfaces
+ * Run test procedures
+ * Fix bugs from previous two steps
+ * Snoop other OSs for any tricks we're not doing
+ * Reduce arbitrary timeouts
+ * Smart multicast support
+ * Temporary MAC change support
+ * Tunable SOFs parameter - ioctl()?
+ * Ethernet stats collection
+ * Code formatting improvements
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/usb.h>
+#include <linux/types.h>
+#include <linux/ethtool.h>
+#include <linux/dma-mapping.h>
+#include <linux/wait.h>
+#include <linux/firmware.h>
+#include <asm/uaccess.h>
+#include <asm/byteorder.h>
+
+#undef DEBUG
+
+#define KAWETH_MTU			1514
+#define KAWETH_BUF_SIZE			1664
+#define KAWETH_TX_TIMEOUT		(5 * HZ)
+#define KAWETH_SCRATCH_SIZE		32
+#define KAWETH_FIRMWARE_BUF_SIZE	4096
+#define KAWETH_CONTROL_TIMEOUT		(30000)
+
+#define KAWETH_STATUS_BROKEN		0x0000001
+#define KAWETH_STATUS_CLOSING		0x0000002
+#define KAWETH_STATUS_SUSPENDING	0x0000004
+
+#define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
+
+#define KAWETH_PACKET_FILTER_PROMISCUOUS	0x01
+#define KAWETH_PACKET_FILTER_ALL_MULTICAST	0x02
+#define KAWETH_PACKET_FILTER_DIRECTED		0x04
+#define KAWETH_PACKET_FILTER_BROADCAST		0x08
+#define KAWETH_PACKET_FILTER_MULTICAST		0x10
+
+/* Table 7 */
+#define KAWETH_COMMAND_GET_ETHERNET_DESC	0x00
+#define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
+#define KAWETH_COMMAND_SET_PACKET_FILTER	0x02
+#define KAWETH_COMMAND_STATISTICS               0x03
+#define KAWETH_COMMAND_SET_TEMP_MAC     	0x06
+#define KAWETH_COMMAND_GET_TEMP_MAC             0x07
+#define KAWETH_COMMAND_SET_URB_SIZE		0x08
+#define KAWETH_COMMAND_SET_SOFS_WAIT		0x09
+#define KAWETH_COMMAND_SCAN			0xFF
+
+#define KAWETH_SOFS_TO_WAIT			0x05
+
+#define INTBUFFERSIZE				4
+
+#define STATE_OFFSET				0
+#define STATE_MASK				0x40
+#define	STATE_SHIFT				5
+
+#define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
+
+
+MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>");
+MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE("kaweth/new_code.bin");
+MODULE_FIRMWARE("kaweth/new_code_fix.bin");
+MODULE_FIRMWARE("kaweth/trigger_code.bin");
+MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
+
+static const char driver_name[] = "kaweth";
+
+static int kaweth_probe(
+		struct usb_interface *intf,
+		const struct usb_device_id *id	/* from id_table */
+	);
+static void kaweth_disconnect(struct usb_interface *intf);
+static int kaweth_internal_control_msg(struct usb_device *usb_dev,
+				       unsigned int pipe,
+				       struct usb_ctrlrequest *cmd, void *data,
+				       int len, int timeout);
+static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
+static int kaweth_resume(struct usb_interface *intf);
+
+/****************************************************************
+ *     usb_device_id
+ ****************************************************************/
+static struct usb_device_id usb_klsi_table[] = {
+	{ USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
+	{ USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
+	{ USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
+	{ USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
+	{ USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
+	{ USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
+	{ USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
+	{ USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
+	{ USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
+	{ USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
+	{ USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
+	{ USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
+	{ USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
+	{ USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
+	{ USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
+	{ USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
+	{ USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
+	{ USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */
+	{ USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
+	{ USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
+	{ USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
+	{ USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
+	{ USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
+	{ USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
+	{ USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
+	{ USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
+	{ USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
+	{ USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
+	{ USB_DEVICE(0x1485, 0x0001) },	/* Silicom U2E */
+	{ USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
+	{ USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
+	{ USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
+	{ USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
+	{ USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
+	{ USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
+	{} /* Null terminator */
+};
+
+MODULE_DEVICE_TABLE (usb, usb_klsi_table);
+
+/****************************************************************
+ *     kaweth_driver
+ ****************************************************************/
+static struct usb_driver kaweth_driver = {
+	.name =		driver_name,
+	.probe =	kaweth_probe,
+	.disconnect =	kaweth_disconnect,
+	.suspend =	kaweth_suspend,
+	.resume =	kaweth_resume,
+	.id_table =     usb_klsi_table,
+	.supports_autosuspend =	1,
+	.disable_hub_initiated_lpm = 1,
+};
+
+typedef __u8 eth_addr_t[6];
+
+/****************************************************************
+ *     usb_eth_dev
+ ****************************************************************/
+struct usb_eth_dev {
+	char *name;
+	__u16 vendor;
+	__u16 device;
+	void *pdata;
+};
+
+/****************************************************************
+ *     kaweth_ethernet_configuration
+ *     Refer Table 8
+ ****************************************************************/
+struct kaweth_ethernet_configuration
+{
+	__u8 size;
+	__u8 reserved1;
+	__u8 reserved2;
+	eth_addr_t hw_addr;
+	__u32 statistics_mask;
+	__le16 segment_size;
+	__u16 max_multicast_filters;
+	__u8 reserved3;
+} __packed;
+
+/****************************************************************
+ *     kaweth_device
+ ****************************************************************/
+struct kaweth_device
+{
+	spinlock_t device_lock;
+
+	__u32 status;
+	int end;
+	int suspend_lowmem_rx;
+	int suspend_lowmem_ctrl;
+	int linkstate;
+	int opened;
+	struct delayed_work lowmem_work;
+
+	struct usb_device *dev;
+	struct usb_interface *intf;
+	struct net_device *net;
+	wait_queue_head_t term_wait;
+
+	struct urb *rx_urb;
+	struct urb *tx_urb;
+	struct urb *irq_urb;
+
+	dma_addr_t intbufferhandle;
+	__u8 *intbuffer;
+	dma_addr_t rxbufferhandle;
+	__u8 *rx_buf;
+
+	
+	struct sk_buff *tx_skb;
+
+	__u8 *firmware_buf;
+	__u8 scratch[KAWETH_SCRATCH_SIZE];
+	__u16 packet_filter_bitmap;
+
+	struct kaweth_ethernet_configuration configuration;
+
+	struct net_device_stats stats;
+};
+
+/****************************************************************
+ *     kaweth_control
+ ****************************************************************/
+static int kaweth_control(struct kaweth_device *kaweth,
+			  unsigned int pipe,
+			  __u8 request,
+			  __u8 requesttype,
+			  __u16 value,
+			  __u16 index,
+			  void *data,
+			  __u16 size,
+			  int timeout)
+{
+	struct usb_ctrlrequest *dr;
+	int retval;
+
+	netdev_dbg(kaweth->net, "kaweth_control()\n");
+
+	if(in_interrupt()) {
+		netdev_dbg(kaweth->net, "in_interrupt()\n");
+		return -EBUSY;
+	}
+
+	dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
+	if (!dr)
+		return -ENOMEM;
+
+	dr->bRequestType = requesttype;
+	dr->bRequest = request;
+	dr->wValue = cpu_to_le16(value);
+	dr->wIndex = cpu_to_le16(index);
+	dr->wLength = cpu_to_le16(size);
+
+	retval = kaweth_internal_control_msg(kaweth->dev,
+					     pipe,
+					     dr,
+					     data,
+					     size,
+					     timeout);
+
+	kfree(dr);
+	return retval;
+}
+
+/****************************************************************
+ *     kaweth_read_configuration
+ ****************************************************************/
+static int kaweth_read_configuration(struct kaweth_device *kaweth)
+{
+	int retval;
+
+	netdev_dbg(kaweth->net, "Reading kaweth configuration\n");
+
+	retval = kaweth_control(kaweth,
+				usb_rcvctrlpipe(kaweth->dev, 0),
+				KAWETH_COMMAND_GET_ETHERNET_DESC,
+				USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
+				0,
+				0,
+				(void *)&kaweth->configuration,
+				sizeof(kaweth->configuration),
+				KAWETH_CONTROL_TIMEOUT);
+
+	return retval;
+}
+
+/****************************************************************
+ *     kaweth_set_urb_size
+ ****************************************************************/
+static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
+{
+	int retval;
+
+	netdev_dbg(kaweth->net, "Setting URB size to %d\n", (unsigned)urb_size);
+
+	retval = kaweth_control(kaweth,
+				usb_sndctrlpipe(kaweth->dev, 0),
+				KAWETH_COMMAND_SET_URB_SIZE,
+				USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+				urb_size,
+				0,
+				(void *)&kaweth->scratch,
+				0,
+				KAWETH_CONTROL_TIMEOUT);
+
+	return retval;
+}
+
+/****************************************************************
+ *     kaweth_set_sofs_wait
+ ****************************************************************/
+static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
+{
+	int retval;
+
+	netdev_dbg(kaweth->net, "Set SOFS wait to %d\n", (unsigned)sofs_wait);
+
+	retval = kaweth_control(kaweth,
+				usb_sndctrlpipe(kaweth->dev, 0),
+				KAWETH_COMMAND_SET_SOFS_WAIT,
+				USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+				sofs_wait,
+				0,
+				(void *)&kaweth->scratch,
+				0,
+				KAWETH_CONTROL_TIMEOUT);
+
+	return retval;
+}
+
+/****************************************************************
+ *     kaweth_set_receive_filter
+ ****************************************************************/
+static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
+				     __u16 receive_filter)
+{
+	int retval;
+
+	netdev_dbg(kaweth->net, "Set receive filter to %d\n",
+		   (unsigned)receive_filter);
+
+	retval = kaweth_control(kaweth,
+				usb_sndctrlpipe(kaweth->dev, 0),
+				KAWETH_COMMAND_SET_PACKET_FILTER,
+				USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+				receive_filter,
+				0,
+				(void *)&kaweth->scratch,
+				0,
+				KAWETH_CONTROL_TIMEOUT);
+
+	return retval;
+}
+
+/****************************************************************
+ *     kaweth_download_firmware
+ ****************************************************************/
+static int kaweth_download_firmware(struct kaweth_device *kaweth,
+				    const char *fwname,
+				    __u8 interrupt,
+				    __u8 type)
+{
+	const struct firmware *fw;
+	int data_len;
+	int ret;
+
+	ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
+	if (ret) {
+		dev_err(&kaweth->intf->dev, "Firmware request failed\n");
+		return ret;
+	}
+
+	if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
+		dev_err(&kaweth->intf->dev, "Firmware too big: %zu\n",
+			fw->size);
+		release_firmware(fw);
+		return -ENOSPC;
+	}
+	data_len = fw->size;
+	memcpy(kaweth->firmware_buf, fw->data, fw->size);
+
+	release_firmware(fw);
+
+	kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
+	kaweth->firmware_buf[3] = data_len >> 8;
+	kaweth->firmware_buf[4] = type;
+	kaweth->firmware_buf[5] = interrupt;
+
+	netdev_dbg(kaweth->net, "High: %i, Low:%i\n", kaweth->firmware_buf[3],
+		   kaweth->firmware_buf[2]);
+
+	netdev_dbg(kaweth->net,
+		   "Downloading firmware at %p to kaweth device at %p\n",
+		   kaweth->firmware_buf, kaweth);
+	netdev_dbg(kaweth->net, "Firmware length: %d\n", data_len);
+
+	return kaweth_control(kaweth,
+		              usb_sndctrlpipe(kaweth->dev, 0),
+			      KAWETH_COMMAND_SCAN,
+			      USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+			      0,
+			      0,
+			      (void *)kaweth->firmware_buf,
+			      data_len,
+			      KAWETH_CONTROL_TIMEOUT);
+}
+
+/****************************************************************
+ *     kaweth_trigger_firmware
+ ****************************************************************/
+static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
+				   __u8 interrupt)
+{
+	kaweth->firmware_buf[0] = 0xB6;
+	kaweth->firmware_buf[1] = 0xC3;
+	kaweth->firmware_buf[2] = 0x01;
+	kaweth->firmware_buf[3] = 0x00;
+	kaweth->firmware_buf[4] = 0x06;
+	kaweth->firmware_buf[5] = interrupt;
+	kaweth->firmware_buf[6] = 0x00;
+	kaweth->firmware_buf[7] = 0x00;
+
+	netdev_dbg(kaweth->net, "Triggering firmware\n");
+
+	return kaweth_control(kaweth,
+			      usb_sndctrlpipe(kaweth->dev, 0),
+			      KAWETH_COMMAND_SCAN,
+			      USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+			      0,
+			      0,
+			      (void *)kaweth->firmware_buf,
+			      8,
+			      KAWETH_CONTROL_TIMEOUT);
+}
+
+/****************************************************************
+ *     kaweth_reset
+ ****************************************************************/
+static int kaweth_reset(struct kaweth_device *kaweth)
+{
+	int result;
+
+	netdev_dbg(kaweth->net, "kaweth_reset(%p)\n", kaweth);
+	result = usb_reset_configuration(kaweth->dev);
+	mdelay(10);
+
+	netdev_dbg(kaweth->net, "kaweth_reset() returns %d.\n", result);
+
+	return result;
+}
+
+static void kaweth_usb_receive(struct urb *);
+static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
+
+/****************************************************************
+	int_callback
+*****************************************************************/
+
+static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
+{
+	int status;
+
+	status = usb_submit_urb (kaweth->irq_urb, mf);
+	if (unlikely(status == -ENOMEM)) {
+		kaweth->suspend_lowmem_ctrl = 1;
+		schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
+	} else {
+		kaweth->suspend_lowmem_ctrl = 0;
+	}
+
+	if (status)
+		dev_err(&kaweth->intf->dev,
+			"can't resubmit intr, %s-%s, status %d\n",
+			kaweth->dev->bus->bus_name,
+			kaweth->dev->devpath, status);
+}
+
+static void int_callback(struct urb *u)
+{
+	struct kaweth_device *kaweth = u->context;
+	int act_state;
+	int status = u->status;
+
+	switch (status) {
+	case 0:			/* success */
+		break;
+	case -ECONNRESET:	/* unlink */
+	case -ENOENT:
+	case -ESHUTDOWN:
+		return;
+	/* -EPIPE:  should clear the halt */
+	default:		/* error */
+		goto resubmit;
+	}
+
+	/* we check the link state to report changes */
+	if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
+		if (act_state)
+			netif_carrier_on(kaweth->net);
+		else
+			netif_carrier_off(kaweth->net);
+
+		kaweth->linkstate = act_state;
+	}
+resubmit:
+	kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
+}
+
+static void kaweth_resubmit_tl(struct work_struct *work)
+{
+	struct kaweth_device *kaweth =
+		container_of(work, struct kaweth_device, lowmem_work.work);
+
+	if (IS_BLOCKED(kaweth->status))
+		return;
+
+	if (kaweth->suspend_lowmem_rx)
+		kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
+
+	if (kaweth->suspend_lowmem_ctrl)
+		kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
+}
+
+
+/****************************************************************
+ *     kaweth_resubmit_rx_urb
+ ****************************************************************/
+static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
+						gfp_t mem_flags)
+{
+	int result;
+
+	usb_fill_bulk_urb(kaweth->rx_urb,
+		      kaweth->dev,
+		      usb_rcvbulkpipe(kaweth->dev, 1),
+		      kaweth->rx_buf,
+		      KAWETH_BUF_SIZE,
+		      kaweth_usb_receive,
+		      kaweth);
+	kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+	kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
+
+	if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
+		if (result == -ENOMEM) {
+			kaweth->suspend_lowmem_rx = 1;
+			schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
+		}
+		dev_err(&kaweth->intf->dev, "resubmitting rx_urb %d failed\n",
+			result);
+	} else {
+		kaweth->suspend_lowmem_rx = 0;
+	}
+
+	return result;
+}
+
+static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
+
+/****************************************************************
+ *     kaweth_usb_receive
+ ****************************************************************/
+static void kaweth_usb_receive(struct urb *urb)
+{
+	struct device *dev = &urb->dev->dev;
+	struct kaweth_device *kaweth = urb->context;
+	struct net_device *net = kaweth->net;
+	int status = urb->status;
+
+	int count = urb->actual_length;
+	int count2 = urb->transfer_buffer_length;
+
+	__u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
+
+	struct sk_buff *skb;
+
+	if (unlikely(status == -EPIPE)) {
+		kaweth->stats.rx_errors++;
+		kaweth->end = 1;
+		wake_up(&kaweth->term_wait);
+		dev_dbg(dev, "Status was -EPIPE.\n");
+		return;
+	}
+	if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
+		/* we are killed - set a flag and wake the disconnect handler */
+		kaweth->end = 1;
+		wake_up(&kaweth->term_wait);
+		dev_dbg(dev, "Status was -ECONNRESET or -ESHUTDOWN.\n");
+		return;
+	}
+	if (unlikely(status == -EPROTO || status == -ETIME ||
+		     status == -EILSEQ)) {
+		kaweth->stats.rx_errors++;
+		dev_dbg(dev, "Status was -EPROTO, -ETIME, or -EILSEQ.\n");
+		return;
+	}
+	if (unlikely(status == -EOVERFLOW)) {
+		kaweth->stats.rx_errors++;
+		dev_dbg(dev, "Status was -EOVERFLOW.\n");
+	}
+	spin_lock(&kaweth->device_lock);
+	if (IS_BLOCKED(kaweth->status)) {
+		spin_unlock(&kaweth->device_lock);
+		return;
+	}
+	spin_unlock(&kaweth->device_lock);
+
+	if(status && status != -EREMOTEIO && count != 1) {
+		dev_err(&kaweth->intf->dev,
+			"%s RX status: %d count: %d packet_len: %d\n",
+			net->name, status, count, (int)pkt_len);
+		kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
+                return;
+	}
+
+	if(kaweth->net && (count > 2)) {
+		if(pkt_len > (count - 2)) {
+			dev_err(&kaweth->intf->dev,
+				"Packet length too long for USB frame (pkt_len: %x, count: %x)\n",
+				pkt_len, count);
+			dev_err(&kaweth->intf->dev, "Packet len & 2047: %x\n",
+				pkt_len & 2047);
+			dev_err(&kaweth->intf->dev, "Count 2: %x\n", count2);
+		        kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
+                        return;
+                }
+
+		if(!(skb = dev_alloc_skb(pkt_len+2))) {
+		        kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
+                        return;
+		}
+
+		skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
+
+		skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
+
+		skb_put(skb, pkt_len);
+
+		skb->protocol = eth_type_trans(skb, net);
+
+		netif_rx(skb);
+
+		kaweth->stats.rx_packets++;
+		kaweth->stats.rx_bytes += pkt_len;
+	}
+
+	kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
+}
+
+/****************************************************************
+ *     kaweth_open
+ ****************************************************************/
+static int kaweth_open(struct net_device *net)
+{
+	struct kaweth_device *kaweth = netdev_priv(net);
+	int res;
+
+	netdev_dbg(kaweth->net, "Opening network device.\n");
+
+	res = usb_autopm_get_interface(kaweth->intf);
+	if (res) {
+		dev_err(&kaweth->intf->dev, "Interface cannot be resumed.\n");
+		return -EIO;
+	}
+	res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
+	if (res)
+		goto err_out;
+
+	usb_fill_int_urb(
+		kaweth->irq_urb,
+		kaweth->dev,
+		usb_rcvintpipe(kaweth->dev, 3),
+		kaweth->intbuffer,
+		INTBUFFERSIZE,
+		int_callback,
+		kaweth,
+		250); /* overriding the descriptor */
+	kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
+	kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
+	if (res) {
+		usb_kill_urb(kaweth->rx_urb);
+		goto err_out;
+	}
+	kaweth->opened = 1;
+
+	netif_start_queue(net);
+
+	kaweth_async_set_rx_mode(kaweth);
+	return 0;
+
+err_out:
+	usb_autopm_put_interface(kaweth->intf);
+	return -EIO;
+}
+
+/****************************************************************
+ *     kaweth_kill_urbs
+ ****************************************************************/
+static void kaweth_kill_urbs(struct kaweth_device *kaweth)
+{
+	usb_kill_urb(kaweth->irq_urb);
+	usb_kill_urb(kaweth->rx_urb);
+	usb_kill_urb(kaweth->tx_urb);
+
+	cancel_delayed_work_sync(&kaweth->lowmem_work);
+
+	/* a scheduled work may have resubmitted,
+	   we hit them again */
+	usb_kill_urb(kaweth->irq_urb);
+	usb_kill_urb(kaweth->rx_urb);
+}
+
+/****************************************************************
+ *     kaweth_close
+ ****************************************************************/
+static int kaweth_close(struct net_device *net)
+{
+	struct kaweth_device *kaweth = netdev_priv(net);
+
+	netif_stop_queue(net);
+	kaweth->opened = 0;
+
+	kaweth->status |= KAWETH_STATUS_CLOSING;
+
+	kaweth_kill_urbs(kaweth);
+
+	kaweth->status &= ~KAWETH_STATUS_CLOSING;
+
+	usb_autopm_put_interface(kaweth->intf);
+
+	return 0;
+}
+
+static u32 kaweth_get_link(struct net_device *dev)
+{
+	struct kaweth_device *kaweth = netdev_priv(dev);
+
+	return kaweth->linkstate;
+}
+
+static const struct ethtool_ops ops = {
+	.get_link	= kaweth_get_link
+};
+
+/****************************************************************
+ *     kaweth_usb_transmit_complete
+ ****************************************************************/
+static void kaweth_usb_transmit_complete(struct urb *urb)
+{
+	struct kaweth_device *kaweth = urb->context;
+	struct sk_buff *skb = kaweth->tx_skb;
+	int status = urb->status;
+
+	if (unlikely(status != 0))
+		if (status != -ENOENT)
+			dev_dbg(&urb->dev->dev, "%s: TX status %d.\n",
+				kaweth->net->name, status);
+
+	netif_wake_queue(kaweth->net);
+	dev_kfree_skb_irq(skb);
+}
+
+/****************************************************************
+ *     kaweth_start_xmit
+ ****************************************************************/
+static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
+					   struct net_device *net)
+{
+	struct kaweth_device *kaweth = netdev_priv(net);
+	__le16 *private_header;
+
+	int res;
+
+	spin_lock_irq(&kaweth->device_lock);
+
+	kaweth_async_set_rx_mode(kaweth);
+	netif_stop_queue(net);
+	if (IS_BLOCKED(kaweth->status)) {
+		goto skip;
+	}
+
+	/* We now decide whether we can put our special header into the sk_buff */
+	if (skb_cloned(skb) || skb_headroom(skb) < 2) {
+		/* no such luck - we make our own */
+		struct sk_buff *copied_skb;
+		copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
+		dev_kfree_skb_irq(skb);
+		skb = copied_skb;
+		if (!copied_skb) {
+			kaweth->stats.tx_errors++;
+			netif_start_queue(net);
+			spin_unlock_irq(&kaweth->device_lock);
+			return NETDEV_TX_OK;
+		}
+	}
+
+	private_header = (__le16 *)__skb_push(skb, 2);
+	*private_header = cpu_to_le16(skb->len-2);
+	kaweth->tx_skb = skb;
+
+	usb_fill_bulk_urb(kaweth->tx_urb,
+		      kaweth->dev,
+		      usb_sndbulkpipe(kaweth->dev, 2),
+		      private_header,
+		      skb->len,
+		      kaweth_usb_transmit_complete,
+		      kaweth);
+	kaweth->end = 0;
+
+	if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
+	{
+		dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
+skip:
+		kaweth->stats.tx_errors++;
+
+		netif_start_queue(net);
+		dev_kfree_skb_irq(skb);
+	}
+	else
+	{
+		kaweth->stats.tx_packets++;
+		kaweth->stats.tx_bytes += skb->len;
+	}
+
+	spin_unlock_irq(&kaweth->device_lock);
+
+	return NETDEV_TX_OK;
+}
+
+/****************************************************************
+ *     kaweth_set_rx_mode
+ ****************************************************************/
+static void kaweth_set_rx_mode(struct net_device *net)
+{
+	struct kaweth_device *kaweth = netdev_priv(net);
+
+	__u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
+                                     KAWETH_PACKET_FILTER_BROADCAST |
+		                     KAWETH_PACKET_FILTER_MULTICAST;
+
+	netdev_dbg(net, "Setting Rx mode to %d\n", packet_filter_bitmap);
+
+	netif_stop_queue(net);
+
+	if (net->flags & IFF_PROMISC) {
+		packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
+	}
+	else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
+		packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
+	}
+
+	kaweth->packet_filter_bitmap = packet_filter_bitmap;
+	netif_wake_queue(net);
+}
+
+/****************************************************************
+ *     kaweth_async_set_rx_mode
+ ****************************************************************/
+static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
+{
+	int result;
+	__u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
+
+	kaweth->packet_filter_bitmap = 0;
+	if (packet_filter_bitmap == 0)
+		return;
+
+	if (in_interrupt())
+		return;
+
+	result = kaweth_control(kaweth,
+				usb_sndctrlpipe(kaweth->dev, 0),
+				KAWETH_COMMAND_SET_PACKET_FILTER,
+				USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+				packet_filter_bitmap,
+				0,
+				(void *)&kaweth->scratch,
+				0,
+				KAWETH_CONTROL_TIMEOUT);
+
+	if(result < 0) {
+		dev_err(&kaweth->intf->dev, "Failed to set Rx mode: %d\n",
+			result);
+	}
+	else {
+		netdev_dbg(kaweth->net, "Set Rx mode to %d\n",
+			   packet_filter_bitmap);
+	}
+}
+
+/****************************************************************
+ *     kaweth_netdev_stats
+ ****************************************************************/
+static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
+{
+	struct kaweth_device *kaweth = netdev_priv(dev);
+	return &kaweth->stats;
+}
+
+/****************************************************************
+ *     kaweth_tx_timeout
+ ****************************************************************/
+static void kaweth_tx_timeout(struct net_device *net)
+{
+	struct kaweth_device *kaweth = netdev_priv(net);
+
+	dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
+	kaweth->stats.tx_errors++;
+	net->trans_start = jiffies;
+
+	usb_unlink_urb(kaweth->tx_urb);
+}
+
+/****************************************************************
+ *     kaweth_suspend
+ ****************************************************************/
+static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	struct kaweth_device *kaweth = usb_get_intfdata(intf);
+	unsigned long flags;
+
+	dev_dbg(&intf->dev, "Suspending device\n");
+	spin_lock_irqsave(&kaweth->device_lock, flags);
+	kaweth->status |= KAWETH_STATUS_SUSPENDING;
+	spin_unlock_irqrestore(&kaweth->device_lock, flags);
+
+	kaweth_kill_urbs(kaweth);
+	return 0;
+}
+
+/****************************************************************
+ *     kaweth_resume
+ ****************************************************************/
+static int kaweth_resume(struct usb_interface *intf)
+{
+	struct kaweth_device *kaweth = usb_get_intfdata(intf);
+	unsigned long flags;
+
+	dev_dbg(&intf->dev, "Resuming device\n");
+	spin_lock_irqsave(&kaweth->device_lock, flags);
+	kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
+	spin_unlock_irqrestore(&kaweth->device_lock, flags);
+
+	if (!kaweth->opened)
+		return 0;
+	kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
+	kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
+
+	return 0;
+}
+
+/****************************************************************
+ *     kaweth_probe
+ ****************************************************************/
+
+
+static const struct net_device_ops kaweth_netdev_ops = {
+	.ndo_open =			kaweth_open,
+	.ndo_stop =			kaweth_close,
+	.ndo_start_xmit =		kaweth_start_xmit,
+	.ndo_tx_timeout =		kaweth_tx_timeout,
+	.ndo_set_rx_mode =		kaweth_set_rx_mode,
+	.ndo_get_stats =		kaweth_netdev_stats,
+	.ndo_change_mtu =		eth_change_mtu,
+	.ndo_set_mac_address =		eth_mac_addr,
+	.ndo_validate_addr =		eth_validate_addr,
+};
+
+static int kaweth_probe(
+		struct usb_interface *intf,
+		const struct usb_device_id *id      /* from id_table */
+	)
+{
+	struct device *dev = &intf->dev;
+	struct usb_device *udev = interface_to_usbdev(intf);
+	struct kaweth_device *kaweth;
+	struct net_device *netdev;
+	const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
+	int result = 0;
+
+	dev_dbg(dev,
+		"Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x\n",
+		udev->devnum, le16_to_cpu(udev->descriptor.idVendor),
+		le16_to_cpu(udev->descriptor.idProduct),
+		le16_to_cpu(udev->descriptor.bcdDevice));
+
+	dev_dbg(dev, "Device at %p\n", udev);
+
+	dev_dbg(dev, "Descriptor length: %x type: %x\n",
+		(int)udev->descriptor.bLength,
+		(int)udev->descriptor.bDescriptorType);
+
+	netdev = alloc_etherdev(sizeof(*kaweth));
+	if (!netdev)
+		return -ENOMEM;
+
+	kaweth = netdev_priv(netdev);
+	kaweth->dev = udev;
+	kaweth->net = netdev;
+
+	spin_lock_init(&kaweth->device_lock);
+	init_waitqueue_head(&kaweth->term_wait);
+
+	dev_dbg(dev, "Resetting.\n");
+
+	kaweth_reset(kaweth);
+
+	/*
+	 * If high byte of bcdDevice is nonzero, firmware is already
+	 * downloaded. Don't try to do it again, or we'll hang the device.
+	 */
+
+	if (le16_to_cpu(udev->descriptor.bcdDevice) >> 8) {
+		dev_info(dev, "Firmware present in device.\n");
+	} else {
+		/* Download the firmware */
+		dev_info(dev, "Downloading firmware...\n");
+		kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
+		if ((result = kaweth_download_firmware(kaweth,
+						      "kaweth/new_code.bin",
+						      100,
+						      2)) < 0) {
+			dev_err(dev, "Error downloading firmware (%d)\n",
+				result);
+			goto err_fw;
+		}
+
+		if ((result = kaweth_download_firmware(kaweth,
+						      "kaweth/new_code_fix.bin",
+						      100,
+						      3)) < 0) {
+			dev_err(dev, "Error downloading firmware fix (%d)\n",
+				result);
+			goto err_fw;
+		}
+
+		if ((result = kaweth_download_firmware(kaweth,
+						      "kaweth/trigger_code.bin",
+						      126,
+						      2)) < 0) {
+			dev_err(dev, "Error downloading trigger code (%d)\n",
+				result);
+			goto err_fw;
+
+		}
+
+		if ((result = kaweth_download_firmware(kaweth,
+						      "kaweth/trigger_code_fix.bin",
+						      126,
+						      3)) < 0) {
+			dev_err(dev, "Error downloading trigger code fix (%d)\n", result);
+			goto err_fw;
+		}
+
+
+		if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
+			dev_err(dev, "Error triggering firmware (%d)\n", result);
+			goto err_fw;
+		}
+
+		/* Device will now disappear for a moment...  */
+		dev_info(dev, "Firmware loaded.  I'll be back...\n");
+err_fw:
+		free_page((unsigned long)kaweth->firmware_buf);
+		free_netdev(netdev);
+		return -EIO;
+	}
+
+	result = kaweth_read_configuration(kaweth);
+
+	if(result < 0) {
+		dev_err(dev, "Error reading configuration (%d), no net device created\n", result);
+		goto err_free_netdev;
+	}
+
+	dev_info(dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
+	dev_info(dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
+	dev_info(dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
+	dev_info(dev, "Read MAC address %pM\n", kaweth->configuration.hw_addr);
+
+	if(!memcmp(&kaweth->configuration.hw_addr,
+                   &bcast_addr,
+		   sizeof(bcast_addr))) {
+		dev_err(dev, "Firmware not functioning properly, no net device created\n");
+		goto err_free_netdev;
+	}
+
+	if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
+		dev_dbg(dev, "Error setting URB size\n");
+		goto err_free_netdev;
+	}
+
+	if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
+		dev_err(dev, "Error setting SOFS wait\n");
+		goto err_free_netdev;
+	}
+
+	result = kaweth_set_receive_filter(kaweth,
+                                           KAWETH_PACKET_FILTER_DIRECTED |
+                                           KAWETH_PACKET_FILTER_BROADCAST |
+                                           KAWETH_PACKET_FILTER_MULTICAST);
+
+	if(result < 0) {
+		dev_err(dev, "Error setting receive filter\n");
+		goto err_free_netdev;
+	}
+
+	dev_dbg(dev, "Initializing net device.\n");
+
+	kaweth->intf = intf;
+
+	kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!kaweth->tx_urb)
+		goto err_free_netdev;
+	kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!kaweth->rx_urb)
+		goto err_only_tx;
+	kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!kaweth->irq_urb)
+		goto err_tx_and_rx;
+
+	kaweth->intbuffer = usb_alloc_coherent(	kaweth->dev,
+						INTBUFFERSIZE,
+						GFP_KERNEL,
+						&kaweth->intbufferhandle);
+	if (!kaweth->intbuffer)
+		goto err_tx_and_rx_and_irq;
+	kaweth->rx_buf = usb_alloc_coherent(	kaweth->dev,
+						KAWETH_BUF_SIZE,
+						GFP_KERNEL,
+						&kaweth->rxbufferhandle);
+	if (!kaweth->rx_buf)
+		goto err_all_but_rxbuf;
+
+	memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
+	memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
+               sizeof(kaweth->configuration.hw_addr));
+
+	netdev->netdev_ops = &kaweth_netdev_ops;
+	netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
+	netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
+	netdev->ethtool_ops = &ops;
+
+	/* kaweth is zeroed as part of alloc_netdev */
+	INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
+	usb_set_intfdata(intf, kaweth);
+
+#if 0
+// dma_supported() is deeply broken on almost all architectures
+	if (dma_supported (dev, 0xffffffffffffffffULL))
+		kaweth->net->features |= NETIF_F_HIGHDMA;
+#endif
+
+	SET_NETDEV_DEV(netdev, dev);
+	if (register_netdev(netdev) != 0) {
+		dev_err(dev, "Error registering netdev.\n");
+		goto err_intfdata;
+	}
+
+	dev_info(dev, "kaweth interface created at %s\n",
+		 kaweth->net->name);
+
+	dev_dbg(dev, "Kaweth probe returning.\n");
+
+	return 0;
+
+err_intfdata:
+	usb_set_intfdata(intf, NULL);
+	usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
+err_all_but_rxbuf:
+	usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
+err_tx_and_rx_and_irq:
+	usb_free_urb(kaweth->irq_urb);
+err_tx_and_rx:
+	usb_free_urb(kaweth->rx_urb);
+err_only_tx:
+	usb_free_urb(kaweth->tx_urb);
+err_free_netdev:
+	free_netdev(netdev);
+
+	return -EIO;
+}
+
+/****************************************************************
+ *     kaweth_disconnect
+ ****************************************************************/
+static void kaweth_disconnect(struct usb_interface *intf)
+{
+	struct kaweth_device *kaweth = usb_get_intfdata(intf);
+	struct net_device *netdev;
+
+	dev_info(&intf->dev, "Unregistering\n");
+
+	usb_set_intfdata(intf, NULL);
+	if (!kaweth) {
+		dev_warn(&intf->dev, "unregistering non-existent device\n");
+		return;
+	}
+	netdev = kaweth->net;
+
+	netdev_dbg(kaweth->net, "Unregistering net device\n");
+	unregister_netdev(netdev);
+
+	usb_free_urb(kaweth->rx_urb);
+	usb_free_urb(kaweth->tx_urb);
+	usb_free_urb(kaweth->irq_urb);
+
+	usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
+	usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
+
+	free_netdev(netdev);
+}
+
+
+// FIXME this completion stuff is a modified clone of
+// an OLD version of some stuff in usb.c ...
+struct usb_api_data {
+	wait_queue_head_t wqh;
+	int done;
+};
+
+/*-------------------------------------------------------------------*
+ * completion handler for compatibility wrappers (sync control/bulk) *
+ *-------------------------------------------------------------------*/
+static void usb_api_blocking_completion(struct urb *urb)
+{
+        struct usb_api_data *awd = (struct usb_api_data *)urb->context;
+
+	awd->done=1;
+	wake_up(&awd->wqh);
+}
+
+/*-------------------------------------------------------------------*
+ *                         COMPATIBILITY STUFF                       *
+ *-------------------------------------------------------------------*/
+
+// Starts urb and waits for completion or timeout
+static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
+{
+	struct usb_api_data awd;
+        int status;
+
+        init_waitqueue_head(&awd.wqh);
+        awd.done = 0;
+
+        urb->context = &awd;
+        status = usb_submit_urb(urb, GFP_ATOMIC);
+        if (status) {
+                // something went wrong
+                usb_free_urb(urb);
+                return status;
+        }
+
+	if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
+                // timeout
+                dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
+                usb_kill_urb(urb);  // remove urb safely
+                status = -ETIMEDOUT;
+        }
+	else {
+                status = urb->status;
+	}
+
+        if (actual_length) {
+                *actual_length = urb->actual_length;
+	}
+
+        usb_free_urb(urb);
+        return status;
+}
+
+/*-------------------------------------------------------------------*/
+// returns status (negative) or length (positive)
+static int kaweth_internal_control_msg(struct usb_device *usb_dev,
+				       unsigned int pipe,
+				       struct usb_ctrlrequest *cmd, void *data,
+				       int len, int timeout)
+{
+        struct urb *urb;
+        int retv;
+        int length = 0; /* shut up GCC */
+
+	urb = usb_alloc_urb(0, GFP_ATOMIC);
+        if (!urb)
+                return -ENOMEM;
+
+        usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
+			 len, usb_api_blocking_completion, NULL);
+
+        retv = usb_start_wait_urb(urb, timeout, &length);
+        if (retv < 0) {
+                return retv;
+	}
+        else {
+                return length;
+	}
+}
+
+module_usb_driver(kaweth_driver);